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Blog - JLCPCB

PCB Design
PCB Manufacturing
PCB Knowledge
PCB Assembly

Blind vs Buried Vias: A Comprehensive Guide for PCB Design

A printed circuit board (PCB) is made up of layers of copper foil circuits stacked on top of each other, and the connections between different circuit layers rely on vias. If the holes drilled by a drilling machine or laser are left as is, they will not conduct electricity, because the surface of the original drilled hole is only resin, which is not conductive. Therefore, a layer of conductive material (usually copper) must be plated on the surface of the drilled hole. In this way, current propagates ......

Sept 29, 2024

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Key Notes on PCB Via Design
High-quality PCB design not only requires innovative concepts but also relies on a deep understanding of PCB manufacturing processes. Via design, as one of the critical steps in PCB design, is crucial for both PCB performance and manufacturing efficiency. Can vias be designed in any size? To answer this question, let’s first understand how holes on a PCB are created. 1. Cutting the Material: PCB manufacturers use automatic cutting machines to slice large copper-clad laminates into substrates of specif......
Jan 22, 2025
Step-by-Step Guide to Create Custom PCB Footprints
If you need a PCB footprint, but it does not exist in EasyEDA's component library, then you can create it yourself. And creating a device also requires a footprint library to complete. The usage method of the footprint library tool is the same as that of the PCB tool under PCB, but there are some unnecessary functions in the toolbar. The footprint library is the various parameters of electronic components, chips, etc. (such as the size of components, length and width, in-line, patch, pad size, length ......
Jan 19, 2025
What is a Pad in PCB Design and Development
Pads serve as the landing spots for the legs or leads of electronic components, allowing these components to be soldered onto the PCB securely. They are small, copper exposed conductive areas that enable both electrical and mechanical connections between components and the board. Traces can be routed from pads to all over the PCB, they also help to hold the component pins in place with the application of soldering. Pads are critical because they: Ensure strong electrical connections between components......
Jan 19, 2025
Thermal Vias in PCB Design for Heat Management
Thermal vias are specialized vias designed to transfer heat from one layer of a PCB to another. These vias are placed near heat-generating components to create a thermal pathway, helping to dissipate heat and reduce the risk of overheating. They are often used with heat sinks, thermal pads, or copper planes to enhance their effectiveness. They are simply plated through holes (PTHs) that are located under a surface-mounted heat source component in a printed circuit board (PCB) that allow heat transfer.......
Jan 20, 2025
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Understanding Industrial PCB Production
Nearly all electrical devices are built on Printed Circuit Boards (PCBs), which also act as the backbone supporting and linking components. The need for dependable and effective mass-produced PCBs has increased significantly as sectors of industry keep developing. Large-scale production of these boards intended for use in areas including automotive, aerospace, consumer electronics, and telecommunications forms part of industrial PCB production. From materials and techniques to best practices for maxim......
Jan 14, 2025
Process of PCB Production
Modern electronics are built on printed circuit boards (PCBs), which also provide the platform connecting and running almost every electronic device, from industrial equipment to cellphones. PCBs have transformed the way that electronic components are combined to enable the creation of more dependable, small, and potent devices. Considering all of the steps involved, different types of PCBs, and their uses across sectors, this article covers the complex process of PCB production. What is PCB Productio......
Jan 13, 2025
Printed Circuit Board Assembly (PCBA): A Step-by-Step Guide
One of the most important factors to create a working circuit board is the assembly technique and process, such a step has to be controlled and carefully executed to ensure the wellness of the final produced device. Printed Circuit Board Assembly (PCBA) is the process of assembling electronic components onto a printed circuit board (PCB) to create a functional electronic device. The assembly process involves various stages, from placing components on the board to testing the final product. This guide ......
Jan 10, 2025
Custom PCBs: The Ultimate Guide to Designing and Ordering Your Own PCB
Custom PCBs (Printed Circuit Boards) are customized circuit boards designed to meet specific requirements or applications that standard off-the-shelf PCBs cannot fulfill. They are utilized in a broad array of electronic devices and systems, serving as a base for mounting and connecting electronic components like resistors, capacitors, integrated circuits, and connectors. Custom PCBs facilitate the creation of specialized and innovative electronic devices, offering the adaptability to fulfill particula......
Jan 3, 2025
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The Impact of Inner Layer Residual Copper Rate on Board Thickness
When we were kids, we heard the children's story "The Crow Drinks Water," where a crow raises the water level by dropping stones into a fixed amount of water in a bottle. The same principle applies to multilayer PCB lamination, where during high temperature and high pressure, PP sheets flow in a liquid state to fill the gaps between the layers. This process is called "resin filling." As seen in the diagram, when the copper coverage in the inner layer is minimal, PP sheets of the same thickness need to......
Jan 22, 2025
AOI Detection Working Principle
#1 What is AOI Detection? Automated Optical Inspection (AOI) is a technology that uses optical principles and image processing techniques to inspect component solder joints on PCBA boards. It can quickly identify subtle defects in solder joints, effectively overcoming the limitations of manual visual inspection. (Image source: Internet) #2 AOI Detection Working Principle AOI detection equipment mainly relies on the principle of light reflection to identify and inspect component solder joints on PCBA b......
Jan 22, 2025
PCB Silkscreen: All You Need to Know
Silk screen is the topmost layer of a PCB, adding a silkscreen layer is the final step in PCB manufacturing. This layer adds ink markings to identify PCB components, test points, symbols, logos, and other important details. Silkscreen plays a crucial role in helping manufacturers and designers easily identify components by annotating them on PCB. The silkscreen ink is a specially non-conductive formulated epoxy. It comes in various colors, the most common in the industry are black and white. PCB desig......
Jan 18, 2025
PCB Board Thickness: Importance and Considerations
An integral component of a printed circuit boards (PCB) design and utility is its thickness. It influences its mechanical stability, electrical performance, and simplicity of construction as well as mechanical strength. Knowing what thickness is optimum for each application is crucial since electronics must get ever smaller. This article discusses the importance of PCB board thickness, the elements affecting it, the accepted thicknesses, and how one should pick the best one. What is PCB Board Thicknes......
Jan 16, 2025
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PCB Soldering Basic Techniques and Overview
Soldering means joining metal components with a melted metal called solder, which has a low melting point compared to other metals. Soldering is crucial in the electronics industry and is the primary method of joining electrical components. There are different types of soldering materials based on quality and their melting points. The most common combination is a tin or lead metal alloy mixed with silver or brass. The soldering iron melts the metal so it can be used like glue to connect two pieces. On......
Nov 1, 2024
The Risks of Using Tin-Spray Process for BGA Packages and Solutions
As integrated circuit (IC) technology evolves, coupled with advancements in equipment and high-precision PCB manufacturing, consumer electronics are trending toward being lighter, thinner, and more powerful. Traditional through-hole or standard surface-mount components (SMT) are no longer sufficient to meet these demands. With the increasing integration level of silicon chips, the packaging method has transitioned to Ball Grid Array (BGA) technology. The Rise of BGA Packaging BGA package offers severa......
Sept 25, 2024
The Comprehensive Guide to PCB Assembly Process at JLCPCB: Efficient and Reliable PCB Manufacturing
One of the most important factors to create a working circuit board is the assembly technique and process, such a step has to be controlled and carefully executed to ensure the wellness of the final produced device. JLCPCB provides PCB Assembly by taking charge of the full steps of soldering each component to its placement on the board based on their capabilities which shortens the path for engineers and companies by saving more time. The PCB Assembly process comes directly after the PCB manufacturing......
Sept 24, 2024
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......
July 27, 2024