PROMAX-JOHNTON CORP. has been recognized as a leading manufacture of linear integrated circuits, such as operational amplifier, comparaton, low dropout regulators, DC to DC converters, various kinds of discrete devices. PROMAX-JOHNTON owns fab and assembly plants both in Keelung, Taiwan and in Ningbo, China significantly increasing production, quality assurance, and delivery capabilities. Due to additional automation, new machinery, and improved process control, productivity has been greatly augmented with escalated yield.