SMT Stencil Guide: Design, Printing & Manufacturing
Your hub for SMT solder paste stencils — aperture and thickness design, materials and coatings, paste-printing techniques and defect prevention, cleaning and maintenance, selection and ordering, and how stencils are made. Practical, standards-based guidance to improve solder paste transfer and first-pass yield, for prototyping and mass production.
Latest Posts
SMT Stencil Application & Printing
Pin-in-Paste: Through-Hole Reflow With a Stencil
Key Takeaways One Reflow Process: Pin-in-paste combines SMT and through-hole soldering into a single reflow pass, eliminating the need for separate wave, selective, or hand-soldering steps when the board has only a few through-hole components. Paste Volume Is Critical: Solder paste is roughly 50% flux by volume, so you need to print about twice the solder volume the finished joint requires. Stencil design—overprint apertures and step-up zones—makes or breaks the process. Target 75% Barrel Fill: Per IP......
Aug 25, 2026
SMT Stencil Design
Stencil Aperture Design: Geometry, Area Ratio & Tips
Key Takeaways Stencil aperture design controls paste volume, deposit shape, and print registration — it's the key controllable variable in SMT print quality. As per IPC-7525B, two math rules are non-negotiable: stencil area ratio ≥ 0.66 and stencil aspect ratio ≥ 1.5. Aperture geometry is component-dependent: 1:1 with pad for BGA, window-pane splits for QFN/BGA thermal pads, home-plate shapes for 0201/01005 chips, and modest reductions for fine-pitch QFP. Aperture reductions intentionally decrease the......
Aug 25, 2026
Stencil Selection & Ordering
DIY PCB Stencil: How to Make a Solder Paste Stencil
Key Takeaways DIY is possible: You can make a working solder paste stencil from Kapton, Mylar, or vinyl using a craft knife, vinyl cutter, or laser for larger SMD components and low-volume prototyping. 0.5 mm pitch is the practical boundary: DIY stencils work well above 0.5 mm pitch but struggle with finer QFNs, QFPs, and BGAs due to poor aperture quality and paste release. Match thickness to your smallest pad: Use 0.10–0.15 mm (4–6 mil) sheet stock, choosing thinner material for smaller pads and thic......
Aug 25, 2026
SMT Stencil Design
Red Glue Stencil: Types, Thickness & Ordering Guide
Key Takeaways A red glue stencil deposits adhesive dots under component bodies, not solder paste on electrical pads. Its main use is holding bottom-side SMD parts during wave soldering of through-hole leads. SMT red glue is commonly dyed red so operators can confirm each deposit during inspection. Printable adhesive families include epoxy, acrylic, and UV- or dual-cure materials. Glue stencils are commonly thicker than paste stencils because the dot must reach the component underside. A custom o......
Aug 24, 2026
SMT Stencil Design
DFN Package Guide: Footprint, Soldering & Stencil Tips
Key Takeaways What a DFN is: A DFN (Dual Flat No-Lead) package is a leadless chip-scale IC package with connection pads on two opposing sides of its underside, usually plus a central exposed thermal pad. Assembly requirements: DFN joints sit hidden under the body, so it needs reflow soldering with a stencil and X-ray or AOI inspection, not hand soldering. Design essentials: Follow IPC-7351 land patterns and IPC-7525 aperture rules, use a thinner stencil foil around 0.1-0.12 mm, and segment the thermal......
Aug 24, 2026
SMT Stencil Application & Printing
Mixed Technology PCB Assembly: Combining SMT and THT on One Board
As technologies become increasingly more complex, the demand for sophisticated printed circuit boards continues to rise. In the electronics industry, the two most prevalent PCB Assembly technologies are SMT and THT, which differ mainly in the manner at which the components are attached. SMT places the components on the surface of the board whereas THT makes use of drilled holes to solder components. While these technologies individually cater to specific applications, advancements in the electronics i......
Aug 24, 2026
Hand Soldering & Stencils
How to Solder QFN Components: A Step-by-Step Guide
Key Takeaways A solder paste stencil is the most reliable way to achieve consistent QFN solder joints. Always use a window-pane paste pattern on the center thermal pad instead of one large paste deposit. Control solder paste volume to prevent floating, bridging, and excessive voiding. Reflow needs a proper soak-then-reflow-then-cool profile Hand soldering is practical only for certain QFN packages and usually cannot solder the center thermal pad effectively. Because QFN solder joints are hidden beneat......
Aug 24, 2026
Hand Soldering & Stencils
How to Solder Pin Headers: A Step-by-Step Guide
Key Takeaways Breadboard or jig: Use a breadboard or jig to hold the header pin square while you work. Tack one pin first: Check alignment before soldering the rest. Keep heat brief: So the plastic housing doesn't melt. Cut breakaway strips: Score the plastic between pins, not by forcing a cut mid-pin. SMD headers: Soldered with paste and reflow rather than through-hole technique. Desolder a pin: Add fresh solder plus wick or a pump, or use hot air. Introduction You solder a header pin, look at it, an......
Aug 24, 2026
SMT Stencil Application & Printing
Moisture Sensitivity Level (MSL): Baking Guide
Key Takeaways Moisture Sensitivity Level (MSL) is a 1-6 classification under IPC/JEDEC J-STD-020 that indicates how quickly a non-hermetic surface-mount package can absorb enough moisture to become vulnerable during reflow. MSL 1 has unlimited floor life at its reference condition, while MSL 6 requires baking before use and reflow within the time printed on the caution label. The floor-life clock begins when the moisture barrier bag is opened and exposure to factory air starts. Baking according to IPC......
Aug 24, 2026
SMT Stencil Types & Manufacturing
Nano-Coating vs Electropolishing for SMT Stencils
Key Takeaways Electropolishing improves the underlying metal surface by smoothing aperture walls. Nano-coating adds a low-friction, hydrophobic surface that helps paste release and reduces residue. Both treatments can improve fine-pitch paste release and support more consistent deposits and higher first-pass yield. Nano-coating is especially useful for BGA/QFN assemblies and high-volume runs, where cleaning frequency and paste-release consistency matter more. Electropolishing and nano-coating are comp......
Aug 24, 2026
SMT Stencil Types & Manufacturing
Stencil in PCB: A Comprehensive Guide to PCB Stencil Design, Fabrication, and JLCPCB Solutions
Figures 1 Solder paste application using a stainless steel stencil to achieve high-precision results. In PCB assembly based on Surface-Mount Technology (SMT), precision is a key factor that determines the final quality of electronic products. One critical element that strongly influences soldering accuracy is the stencil. The stencil functions as a physical template that controls the distribution of solder paste onto PCB pads before components are placed. Accurate solder paste application produces rel......
Aug 12, 2026
Stencil Selection & Ordering
How to Choose an SMT Stencil
What is an SMT stencil? SMT Stencil is a thin metal sheet used in the soldering process for SMT (Surface Mount Technology) and it plays an essential role in the SMT soldering process. Smt Stencil allows the direct placement of solder paste onto the SMD pads of PCB, which can help prevent errors and defects during the reflow soldering process. This results in a precise amount of tin coverage once the work is completed. Types of SMT Stencils Depending on the application of solder paste, there are three ......
Aug 12, 2026
SMT Stencil Types & Manufacturing
Unlocking the Secrets of Nano-Coated Stencil Manufacturing
Nano-Coated Stencil Manufacturing Process The manufacturing of nano-coated stencils involves a series of precision engineering steps including design and drafting, laser cutting, polishing, nano-coating deposition, and quality inspection. Below is a detailed description of each process stage: 1. Design and Drafting (1) Data Acquisition: Accurate data is obtained from customer-supplied design files (e.g., Gerber files, PCB layouts) or physical product samples. This includes stencil dimensions, pad layo......
Aug 12, 2026
SMT Stencil Types & Manufacturing
The ROI of Nano-Coated Stencils in PCB Assembly Lines
Nano coatings offer several benefits. They are hydrophobic and repel water-based chemistry or flux, and some are also oleophobic and repel oil-based chemistry or flux. When applied to the bottom or board side of the stencil, these coatings will prevent solder paste squeeze-out during the print process between the stencil and PCB from sticking to the bottom of the stencil when the stencil separates from the board. As a result, the next print will be as good as the initial print, and bridging is reduced......
Aug 12, 2026
SMT Stencil Types & Manufacturing
What Are Laser Cut Stencils？ A Guide for PCB Assembly
Traditional PCB assembly processes require the manual placement of electronic components before soldering. However, the increasing complexity of electronic printed circuit boards, combined with the need for miniaturisation, necessitates mechanical assembly and solder paste application using SMT stencils. Placing and soldering many small components on a small circuit board is no longer practical.Stencils replace the hand soldering of surface mount components and the inconsistencies caused by hand solde......
Aug 12, 2026
SMT Stencil Types & Manufacturing
Stencil Cutting Machine Guide: Choosing the Best Solution for PCB Stencil Manufacturing
In the PCB assembly process using Surface-Mount Technology (SMT), precision plays a critical role in determining the final quality of a market-ready product. One of the most crucial stages in SMT is the solder paste printing process, which is the first step in the SMT production line. In this process, the stencil functions as the medium that distributes solder paste onto each component pad. At this stage, the stencil cutting machine plays a vital role in determining the overall success of the assembly......
Aug 12, 2026
SMT Stencil Application & Printing
Understanding SMT Stencil Printers for Accurate PCB Solder Paste Printing
Stencil printing is a critical process in SMT (Surface Mount Technology) assembly, significantly impacting the quality and reliability of solder joints on PCBs. The crucial machine for implementing this is the SMT Stencil Printer, which applies an appropriate measure of solder paste to each pad of the PCB board before it goes to the placement of components. For those of you looking to work out what a stencil printer is and why it matters in manufacturing, you've come to the right place. This is the ba......
Aug 12, 2026
SMT Stencil Application & Printing
Surface Mount Stencil: A Practical Guide for SMT Printing and Solder Paste Application
It starts with a slim piece of metal, slipped in early during assembly. Before any part lands in place, before heat ever touches the board, that layer shapes the flow. Where the paste spreads comes down to its design. How thick it is, how it's cut - those details decide what sticks and what washes away. For engineers looking for reliable stencils, JLCPCB provides high-precision SMT stencils that integrate seamlessly with PCB production workflows. Down goes solder paste, slipping through narrow cuts in......
Aug 12, 2026
Stencil Selection & Ordering
Order Custom Stencils for PCB Assembly: How to Make, Buy, and Choose the Right Supplier
Surface Mount Technology (SMT) stencils are essential tools in modern PCB assembly. They are thin sheets of metal, usually stainless steel, with precise cut-outs that allow solder paste to be applied accurately to PCB pads. The quality of the stencil directly affects solder paste deposition, which in turn impacts the reliability of the final assembled PCB. Engineers often need to order custom stencils instead of relying on generic options. Every PCB design has unique pad layouts, component densities, ......
Aug 12, 2026
Stencil Selection & Ordering
Custom Stencils for PCB Assembly: Design, Ordering, and Usage Guide
Have you ever faced solder bridging or insufficient solder issues that ruined an entire production batch? In many cases, the problem is not the pick-and-place machine, but the very first step of the process: solder paste printing. This is where custom stencils make the difference between a reliable product and one that requires extensive rework. Unlike rigid standard stencils, a custom SMT stencil gives engineers full control over solder paste volume, allowing precise adjustment to match increasingly ......
Aug 12, 2026
SMT Stencil Application & Printing
Solder Bead Prevention: How PCB Stencil Design & Process Control Deliver Defect-Free Reflow Soldering
In modern SMT assembly, solder joint quality is determined long before the reflow oven starts—at the solder paste printing stage. When this step is not properly controlled, the consequences appear after reflow as tiny spherical solder particles scattered around component pads: solder beads. For engineers working with high-density assemblies, these defects are familiar and frustrating because they reappear whenever a process variable drifts outside its optimum range. This guide takes an engineering-fir......
Aug 12, 2026
SMT Stencil Application & Printing
How to Use a BGA Stencil for SMT Assembly and Reballing (Design & Process Guide)
Anyone who's spent time in a lab knows the look. You flip over a BGA chip and stare at the bottom. Flat. Featureless. No legs. No leads. Just a grid of tiny silver bumps. First thought? How the hell am I supposed to solder this? The Ball Grid Array (BGA) package is a trade-off. You get insane I/O density in a tiny footprint. But every single connection is hidden. You can't see them, and you can't poke them with an iron. Here's the thing I learned after lifting more pads than I'd like to admit: learnin......
Aug 12, 2026
SMT Stencil Application & Printing
Best Manual Pick and Place Tools for Precise PCB Assembly
While fully automated robotic SMT lines handle mass production efficiently, every hardware innovation begins on a workbench. Engineers shifting from soldering large through-hole components to microscopic surface-mount devices (SMD) by hand quickly realize that precision and control are everything. Achieving factory-level assembly on your desk is absolutely possible with the right setup. This guide reviews the essential tool categories needed to build an effective prototyping workbench, covering precis......
Aug 12, 2026
SMT Stencil Application & Printing
Solder Paste Printing Defects: How Precision Stencils Prevent Assembly Failures
Key Takeaways 70% Rule: Approximately 70% of SMT defects originate from the solder paste printing stage, making it the most critical process to optimize. Root Causes: Defects like bridging, insufficient paste, misalignment, and slumping are caused by stencil tension, process parameters (pressure, speed), and paste chemistry/environment. Area Ratio Matters: Maintaining an aperture Area Ratio (AR) above 0.66 (per IPC-7525) is essential to ensure proper paste transfer efficiency and prevent chronic insuf......
Aug 12, 2026
SMT Stencil Application & Printing
Manual Pick and Place: A Cost-Effective SMT Alternative
Key Takeaways for Manual Pick and Place Manual pick and place uses a hand-held vacuum wand and positioning stage to place SMD components by hand, replacing tweezers in prototype assembly. It is most cost-effective for production runs of 1 to 50 boards, where an automated SMT pick-and-place machine cannot justify its $10,000+ setup cost. A complete manual workstation runs $300 to $500, compared with $10,000+ for an entry-level automated pick and place machine. SMT stencil quality is the single largest ......
Aug 12, 2026
SMT Stencil Application & Printing
Solder Paste Printing Machine Guide: Selection, Settings & Stencil Optimization
Key Takeaways at a Glance A solder paste printing machine forces paste through stencil apertures onto PCB pads, setting the volume and registration that every later stage depends on. Printing is where most SMT defects begin — industry studies commonly attribute more than half of assembly defects to the paste-print stage. Manual printers fit prototypes and low volume, semi-automatic suits mid-volume EMS work, and fully automatic inline systems handle continuous, high-throughput production. Typical indu......
Aug 12, 2026
SMT Stencil Application & Printing
Solder Paste Stencil Defects: Causes and Fixes for Higher SMT Yield
Usually, the circuit board stencil is responsible for roughly 60% to 70% of all SMT defects. That number surprises people. It shouldn't. The stencil controls paste volume, deposit geometry, and positional accuracy all at once. When it gets wrong, everything downstream pays for it. The shift in thinking that separates good engineers from great ones is simple: stop seeing the PCB stencil as a metal sheet with holes in it. It is a precision fluid delivery system. Every aperture wall, every micron of foil......
Aug 11, 2026
SMT Stencil Application & Printing
SMD Glue & Red Glue: A PCB Assembly Application Guide 2026
The reality of modern PCB assembly is that "mixed-technology" is still very much the norm. When a board hits the wave soldering machine, bottom-side SMD components face a high-velocity river of molten metal. Without a solid mechanical bond, they’ll simply wash away into the solder pot. That’s where the precision application of SMD glue becomes the difference between a successful run and a bin full of scrap. Quick Answer: How to Apply SMD Glue in SMT If you need to configure your SMT stencil for adhesi......
Aug 11, 2026
SMT Stencil Cleaning & Maintenance
Stencil Cleaning Methods: Manual vs Automatic
For precise and reliable solder paste pattern application on the PCB pads in Surface Mount Technology (SMT) printed circuit board assembly, stencils are utilized. To keep the print quality high and avoid mistakes, it's important to clean the cutouts often. Although automatic stencil cleaners are frequently used in manufacturing, hand cleaning is recommended when assembling prototype PCBs or in smaller quantities. Because it determines the process's yield and return on investment, stencil cleaning is a......
Aug 11, 2026
SMT Stencil Cleaning & Maintenance
SMT Stencil Cleaning Guide: Process, Frequency, and Tips
Key Takeaways about SMT Stencil Cleaning SMT stencil cleaning removes solder paste residue from aperture walls and the stencil underside, keeping paste transfer efficiency between 80% and 100%. Industry analysis attributes over 60% of SMT defects to the paste-print step — most of which trace back to a stencil cleaning lapse. Two stages matter: under-screen cleaning (between cycles, typically every 5–10 prints) and off-line cleaning (after production completes). IPA handles standard flux residue; dedic......
Aug 11, 2026
SMT Stencil Design
A Beginners Guide to Step-Up and Step-Down Stencils
As everyone knows, companies are moving down to 2nm, and electronics are at their peak right now. The component sizes of a PCB likewise drastically shrink during a ten-year period. From 1206, BGAs have shrunk to 0402, 0201, and even smaller. Due to the small size of the components and the requirement for high throughput, defects such as tombstoning, bridging, or poor connections may occur during the soldering process. To address these challenges, specialized stencil technologies such as step-up and st......
Aug 11, 2026
SMT Stencil Design
Design Guidelines for Industry-Standard Solder Stencil
Solder paste printing is one of the most important processes in PCB assembly, and the design of a stencil directly affects the quality of solder paste application. In a previous article, we discussed stencils and their types in detail. JLCPCB’s advanced stencil options, including step-up/step-down and nano-coated stencils, help engineers achieve higher printing accuracy and assembly reliability. In electronics hardware design, following proper design rules is just as crucial as having the right tools.......
Aug 11, 2026
SMT Stencil Design
SMT Stencil Design Tips for Improving Solder Paste Deposition
Solder paste deposition through stencil is a method to mass produce the units. Even with advanced placement machines and reflow profiles. Defects like bridging - tombstoning and insufficient solder joints can often be traced back to poor stencil design. Proper stencil design helps in achieving consistent and high-quality solder joints. As component sizes continue to shrink and circuit densities increase, JLCPCB provides high-precision stencils with options like step designs, electropolishing, and nano......
Aug 11, 2026
SMT Stencil Design
Solder Paste Layer: How to Create and Optimize It
While designing a PCB, you've probably noticed two layers in your EDA tool that look almost identical: the solder paste layer and the solder mask. Both sit alongside the copper layers and use pad-shaped outlines, making it easy to assume they serve the same purpose. They don't, and knowing the difference matters for how your board gets assembled. This guide breaks down the solder paste layer (a.k.a. cream layer) — what it is, how it differs from the solder mask, how to generate it, and how to optimize......
Aug 03, 2026
Stencil Selection & Ordering
SMT Stencil Thickness Guide 2026: How to Choose the Right Solder Paste Stencil
In SMT assembly, the stencil quietly decides whether a production run succeeds or fails. Problems like bridging, tombstoning, and insufficient wetting are frequently traced back not to PCB design errors, but to incorrect stencil selection or poorly controlled paste volume. Quick Answer: How to Choose a Solder Paste Stencil If you need to define your stencil parameters immediately, follow this quick decision guide: Select thickness based on component pitch: Use component density as your primary baselin......
Jul 31, 2026
SMT Stencil Application & Printing
SMD Assembly vs THT Assembly: A Practical Guide
Every PCB design eventually faces the same fork: should this part be SMD or THT, and what does that choice actually mean for the manufacturing line? The distinction between SMD and THT assembly extends far beyond component selection. It requires two completely separate manufacturing toolchains and introduces entirely distinct defect modes. For mixed-technology layouts, a critical intermediate step is the bottom-side adhesive process. This stage involves dispensing precise dots of thermosetting epoxy t......
Jul 30, 2026
SMT Stencil Design
Step Stencil Design: The Complete Technical Guide
Key Takeaways A multi-level stencil places different foil thicknesses in distinct zones—thinner for fine-pitch components, thicker where high-mass joints need more paste volume. Typical step depths run 0.025 mm to 0.05 mm (25–50% of base foil thickness). Exceeding 50% risks mechanical failure, foil fatigue, and print inconsistency. Maintain 1.5–2.0 mm clearance between any aperture and the nearest step edge to prevent squeegee bounce, paste scooping, and volume variation. Modern step stencil manufactu......
Jul 11, 2026
SMT Stencil Application & Printing
The Complete Stencil Guide for Lead-Free Solder Paste Printing
Key Takeaways SAC305 is the global standard: Sn96.5/Ag3.0/Cu0.5 offers a near-eutectic melting range of 217–220°C, excellent mechanical reliability, and broad industry acceptance. SN100C (Sn-Cu-Ni+Ge) is the leading silver-free alternative for high-volume cost reduction. 34°C higher melting point shrinks process window: Lead-free alloys melt ~34°C higher than Sn63/Pb37, requiring tight reflow profiles with peak temperatures of 235–250°C and TAL of 45–90 seconds. Paste storage is non-negotiable: Store ......
Jun 15, 2026
SMT Stencil Design
SMT Stencil Fiducial: Types, Design Rules, and Placement
Key Takeaways Alignment accuracy is critical: Even a ±0.003 mm precision stencil will produce defective boards if misaligned by 50 microns — fiducials are the only way to prevent this. Half-etched (blind) fiducials are the professional standard: They deliver maximum optical contrast without paste contamination risks, ideal for pitches below 0.5 mm. Three-point triangulation is essential for fine-pitch: Two fiducials correct X, Y, and rotation, but only a third enables scaling compensation to catch FR4......
Jun 10, 2026
Hand Soldering & Stencils
Hot Air Surface Mount Soldering: A Step-by-Step Guide
Key Takeaways Heat Control Is Everything: Hot air SMD soldering delivers uniform heat across all pads simultaneously, eliminating the lifted pads and cold joints common with iron-based soldering of fine-pitch components. Airflow Kills Small Parts: Set airflow to just 10–20% for 0402/0201 passives to avoid the Bernoulli Effect that turns tiny resistors into projectiles. Stencil Precision Prevents Tombstoning: A precision-cut SMT stencil deposits equal paste volume on both pads, balancing surface tensio......
May 28, 2026
Hand Soldering & Stencils
Solder Bridging: Preventing a Common PCB Soldering Defect
Modern electronics demand compact PCB layouts with dense pad spacing and miniature components. Engineers deploy 0201 packages, fine pitch QFN devices, and large BGA arrays across SMT assembly lines. These layout conditions increase complexity during reflow soldering and raise the probability of PCB soldering defects. Solder bridging appears frequently within high-density boards that contain narrow pad spacing and large solder paste deposits. A solder bridge forms an unintended conductive path between ......
Mar 27, 2026
Hand Soldering & Stencils
How to Master PCB Reflow Soldering at Home Using a Hot Plate and Stencil
Soldering small SMD components like 0402s, QFNs, or BGAs with a standard iron produces inconsistent joints and defects. Reflow soldering at home using a hot plate offers a controlled, repeatable method for melting solder paste across multiple pads simultaneously. Engineers and hobbyists achieve uniform joints and reduced bridging with proper temperature control. High-precision PCB stencils guide solder paste placement, ensuring each pad receives the exact volume for fine-pitch and high-density layouts......
Mar 27, 2026
Hand Soldering & Stencils
Top 5 PCB Soldering Defects and How to Prevent Them
PCB design takes hours of careful work. You verify every trace and check every footprint. However, a single solder bridge or a brittle cold joint can ruin the entire project. Soldering defects like these can be an immense frustration for every engineer out there. While a good soldering iron is essential, manual assembly has limits as components get smaller. That's where you have to approach the whole thing with strategy. Identifying the common defects isn't rocket science once you know what to look fo......
Mar 27, 2026
Hand Soldering & Stencils
How to Prevent Solder Balls in PCB Assembly: A Complete Guide
Take one of the boards off the line, and put it under the microscope, and there they are, little metallic balls here and there on the solder mask. This is one of the reasons why solder balls are dangerous, because they do not lead to immediate failure. A ball sitting clear of any conductor looks harmless until the product vibrates, thermally cycles, and the ball migrates into a gap between two traces. Six months later: an intermittent fault with no obvious cause. They're also a process signal where co......
Mar 27, 2026
SMT Stencil Types & Manufacturing
The Essential Guide to SMT Stencils in PCB Assembly
Introduction In the dynamic world of electronics manufacturing, Surface Mount Technology (SMT) plays a crucial role in achieving efficiency and precision in printed circuit board (PCB) assembly. Central to the SMT process is the SMT stencil, an indispensable tool for the accurate application of solder paste. This ensures solid electrical connections between components and PCBs. This guide delves into the specifics of SMT stencils, examining their types, materials, manufacturing methods, advantages, ch......
Mar 23, 2026
SMT Stencil Types & Manufacturing
Nano-Coatings in PCB Manufacturing: How They Outperform Traditional Stencils
Nano coating is a thin hydrophobic (water repellent) and oleophobic (oil repellent) treatment used on the undersides and edges of solder paste stencils. With this the surface becomes non-stick which reduces the number of cleaning cycles required for the solder paste printing process. Upon application, the less than 5 nanometer coating bonds with the stencil foil at the microscopic level, which does not change the size and shape of the stencil. Nano coating is an industry proven process which shows imm......
Mar 23, 2026
Stencil Selection & Ordering
Custom Cut Stencils for PCB Assembly: How to Cut, Use and Choose the Right PCB Stencil
Custom-cut stencil and Solder paste printing are two of the most vital processes in Surface Mount Technology (SMT) PCB assembly, concerning solder joint quality, electrical performance, and product reliability over time. SMT stencils are used to deposit solder paste in accurate amounts onto PCB pads, or for depositing and compressing adhesive pastes which are arranged in the form of a column on components such as connectors and sockets. While PCB designs have seen a trend toward increased density, fin......
Jan 31, 2026
Stencil Selection & Ordering
Custom Stencil Maker: How Custom SMT Stencils Are Designed, Made, and Used
Custom stencils and solder paste printing are two of the most critical processes in Surface Mount Technology (SMT) Assembly, which directly affect the quality, reliability, and performance of electronic products. Before a component is placed on it, the SMT stencil is responsible for controlling how much and where solder paste is applied onto PCB pads. A well-defined stencil leads to less variation in joint geometry and size, as well as producing better production yield. To reach that level of accuracy......
Jan 30, 2026
Stencil Selection & Ordering
Choosing the Right Stencil Maker for PCB Assembly
Surface mount technology assembly relies on controlled solder paste deposition across dense PCB pad layouts. SMT stencil makers regulate paste volume through apertures that match copper land patterns. A stencil maker machine influences solder joint geometry, electrical continuity, and reflow consistency. Laser cut stencil maker systems achieve aperture accuracy and stencil flatness for automated printing. Stencil makers exist as local stencil maker near me services and scalable online stencil maker pl......
Jan 29, 2026
SMT Stencil Types & Manufacturing
Laser Cut Stencil for PCB Assembly: Materials, Machines, and Key Advantages
Modern surface mount assembly relies on precise solder paste transfer across dense PCB pad arrays. Inconsistent paste volume produces opens, solder bridges, and unstable joints during reflow. PCB stencils control paste deposition through apertures that match copper land patterns, ensuring accurate and repeatable printing. Laser cut stencils achieve high dimensional accuracy with uniform aperture walls, which improve paste release for fine pitch components. These stencils handle prototype and productio......
Jan 23, 2026
SMT Stencil Types & Manufacturing
Why PCB Stencil Are Key to High-Quality SMT Assembly
PCB(Printed Circuit Board) stencil is a critical component of Surface Mount Technology (SMT) assembly. It plays a vital role in ensuring the accuracy and consistency of SMT assembly results, which directly affects the functionality and performance of the final product. PCB stencil also called SMT stencil, Circuit Board stencil is used to apply solder paste to the PCB, which is then used to attach SMT components to the board. Without the use of PCB stencil, it becomes challenging to achieve high-qualit......
Jan 23, 2026
SMT Stencil Types & Manufacturing
How does Electropolishing Work in PCB Stencil
To ensure optimum solder paste release, PCB stencil producers must offer superior finishes. One method for enhancing the functionality of stencils is electropolishing. How does electropolishing improve PCB stencils, and what is it? The continuous application of laser beams during the PCB stencil-making process causes the opening or aperture wall to become rough. This occurs as a result of the sheet material being melted by the laser beam, which causes certain surface irregularities. Electropolishing i......
Dec 29, 2025
SMT Stencil Types & Manufacturing
Types of Solder Stencils: Laser-Cut, Electroformed and Etched
I had covered a lot of stencils in the past, they are awesome tools for an electronics designer. At this point everyone knows they are a simple thin piece of steel which acts as a mask for soldering paste. Once applied we can put the components and heat them. And we have our PCB ready! Too simple. Although there are some steps which we have to look into such as soldering paste thermal profile and heating process of the PCB. If heated in the wrong way components can also be damaged. Today we are not go......
Dec 29, 2025
Stencil Selection & Ordering
SMD Stencils in Prototyping vs Mass Production
SMD stencils are known for mass production and easy solder paste dispensing. They are widely used in the industry. The stencils are very useful when you are mass-producing a unit. Today, we are not going into physics or manufacturing but talking about the different use case scenarios. However, the stencil requirements for prototyping are quite different from those in mass production. In mass production, we need yield, the better the yield more efficient the production. For these needs, JLCPCB offers c......
Dec 29, 2025
SMT Stencil Types & Manufacturing
When to Choose Electroformed Stencils
A high-quality PCB stencil is necessary for accurate solder paste application. Ordering PCB stencil is simple with JLCPCB, no matter whether you're working on small-scale production or prototypes. The method of electroforming involves depositing atoms one after the other to create metal, stencils, or pieces. This method turns a mandrel or master surface into an extremely exact duplicate. Another notable feature of electroforming is its repeatability. With 0.01-mil increments, electroform stencils can ......
Dec 29, 2025
SMT Stencil Types & Manufacturing
How Nano Coatings Affect Stencil Performance in SMT Printing
The undersides and edges of solder paste stencils are treated with a thin layer of nano coating, which is oleophobic (oil repellent) and hydrophobic (water resistant). This makes the surface non-stick, which lowers the number of cleaning cycles needed for the printing process using solder paste. The less than 5 nanometer coating does not alter the stencil's size or shape upon application; instead, it forms a tiny bond with the stencil foil.JLCPCB offers nano-coated stencils that leverage this technolo......
Dec 29, 2025
Stencil Selection & Ordering
The Importance of High Precision in PCB Stencil Manufacturing
PCB stencils play a crucial role in the manufacturing process, especially when dealing with small pitch components. High precision in stencil manufacturing ensures accurate solder paste deposition, which is essential for reliable and high-performance electronic assemblies. In this article, we will highlight the importance of high precision in stencil manufacturing using an example from JLCPCB. We will also demonstrate the exact manufactured dimensions compared to the desired dimensions using measureme......
Sep 19, 2025
SMT Stencil Types & Manufacturing
SAM vs Ceramic: Choosing the Right Nano-Coating for Your PCB Stencil
As SMT designs evolve, tighter pitches and smaller components are introduced in electronics. Traditional stencil services can be used for bigger SMD pads but as the innovation goes on nano coated stencils comes to the market. Nano coatings are hydrophobic and oleophobic and repel water, oil and solder paste flux. Some benefits of using these coatings are improved transfer efficiency, reduced need (or frequency) of underside cleaning, and reduced bridging after print. There are two types of Nano-coatin......
May 13, 2025
SMT Stencil Types & Manufacturing
Reducing Solder Bridging and Cleaning Costs with Nano-Coated Stencils
The ongoing trend for miniaturization of electronic devices ensures that the surface mount assembly process will continue to provide new challenges. Components and stencil apertures are getting smaller and tighter in pitch. The demands on the solder paste printing process require improvements in technology. Nano-coatings for stencils have been available for many years. The coatings are supplied in two common forms. The most common form is a multiple step liquid coating which is applied by wiping onto ......
May 13, 2025
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