Printed
circuit board Manufacturer, Photoplotting
All types of Pcb, surface mount sm, PTH, SS single
sided, ML multi layer prototypes. Cheap
high quality PCBs Printed circuit boards.
Best described as a thick normally blue plastic covering which is
resistant to soldering processes. It's designed to tent over component
or mounting holes and prevent them from filling with solder during wave
soldering. Another use is as an alternative to masking tape in order to
protect edge connectors. The ink in the tin before use closely resembles
window putty, and also requires a special silk screen covered with a
very course mesh. Once applied it only takes an odd minute of baking to
turn it into its solid dry form.
Please note that on conventional non PTH circuits by either taking a
small section out of a pad or creating a solder relief area using ink,
it is possible to reduce the number of holes that fill with solder. The
removed or covered section optimum shape is best described as a Packman
mouth which is almost closed.
