... each new job and should contain the following information to ensure that the finished board is to your requirements. - Always required even when | MULTILAYER CIRCUIT BOARDS ONLINE | a drill file is supplied, to enable inspection of panels immediately after drilling and finished boards prior to despatching. Hole sizes must be clearly represented | MULTILAYER CIRCUIT BOARDS ONLINE | with distinct differences between each size. Tolerances are not required unless different to our standard of +0.1 / -0.05 mm. - Preferred with overall mechanical | MULTILAYER CIRCUIT BOARDS ONLINE | dimensions including notches, cutouts and slots. Also preferred is a positioning (datum) dimension (drilled hole is best). Tolerances are not required unless different to our | MULTILAYER CIRCUIT BOARDS ONLINE | standard of + / -0.25 mm. Other information required for all boards includes: board thickness (standard = 1.6mm) base copper thickness (std = 18mm) solder | MULTILAYER CIRCUIT BOARDS ONLINE | mask colour (std = green) solder mask type (std = liquid photoimageable) component legend colour (std = white) bare board testing requirement (std for multilayer | MULTILAYER CIRCUIT BOARDS ONLINE | and fine line production ...
[ Multilayer Circuit Boards Online ]


... new job and should contain the following information to ensure that the finished board is to your requirements. - Always required even when a | MULTILAYER CIRCUIT BOARDS ONLINE | drill file is supplied, to enable inspection of panels immediately after drilling and finished boards prior to despatching. Hole sizes must be clearly represented with | MULTILAYER CIRCUIT BOARDS ONLINE | distinct differences between each size. Tolerances are not required unless different to our standard of +0.1 / -0.05 mm. - Preferred with | OVERALL MECHANICAL | MULTILAYER CIRCUIT BOARDS ONLINE | DIMENSIONS | including notches, cutouts and slots. Also preferred is a positioning (datum) dimension (drilled hole is best). Tolerances are not required unless different to | MULTILAYER CIRCUIT BOARDS ONLINE | our standard of + / -0.25 mm. | OTHER INFORMATION REQUIRED FOR ALL BOARDS INCLUDES: | board thickness (standard = 1.6mm) base copper thickness (std | MULTILAYER CIRCUIT BOARDS ONLINE | = 18mm) solder mask colour (std = green) solder mask type (std = liquid photoimageable) component legend colour (std = white) bare board testing requirement | MULTILAYER CIRCUIT BOARDS ONLINE | (std for multilayer and fine line production ...
[ Multilayer Circuit Boards Online ]


... AND PROCESSES Not only the expense of the material makes a high gold plating undesirable;  the problem of soldering bath pollution is also a | MULTILAYER CIRCUIT BOARDS ONLINE | reason for as thin a coating as possible. It is not only the use of a precious metal, gold, which increases the price but especially | MULTILAYER CIRCUIT BOARDS ONLINE | the processing costs. The number of machine hours alone is far higher than for solder levelling as the facilities required are similarly complex to those | MULTILAYER CIRCUIT BOARDS ONLINE | for galvanization, which additionally require a complex waste water processing infrastructure. The immersion nickel gold process also requires staff intensive attention as the chemical baths | MULTILAYER CIRCUIT BOARDS ONLINE | call for a great deal of analysis and supervision due to the narrow processing slit. The process of solder mask coating as well as de- | MULTILAYER CIRCUIT BOARDS ONLINE | oxidation of bare copper surfaces (activation) must perfectly match the gold plating. To prevent the risk of poor metallic deposition on the gold surface, vias must | MULTILAYER CIRCUIT BOARDS ONLINE | be completely free of solder mask coating or be completely closed by ...
[ Multilayer Circuit Boards Online ]