Printed circuit board silkscreen
white, although other colors are available: yellow, black, blue, red. Screen printing is used to render useful information on the PCB board that can help users during assembly. It is used to Capability Manufacturing PCB mark component values, part numbers, test points, polarity, etc. Screen printing does not influence the
Controlled impedances of printed circuits
it possible to measure the quality of copper tracks. The impedance is an alternating current (AC) characteristic that increases with frequency and becomes critical for printed circuits operating at frequencies above Manufacturing PCB Capability 200 or 300 Mhz. Impedance calculator software is a good starting point to determine the track width (w) and
Printed circuit board assembly
for multilayer printed circuit boards with more than two, four and especially more than six PCB Capability Manufacturing layers of copper has been concurrent with the adoption of surface mount technology. "Through holes" components are assembled by their legs passing through the board and glued to the pads on the other side.