... step forward. In this approach, the books are enclosed in a vacuum tight chamber, permitting lamination to take place in a vacuum environment. The | CIRCUIT BOARDS PRODUCE | press applies heat and pressure so that the thermosetting resin in the prepreg undergoes cross-linking which bonds all layers together. The press then goes through | CIRCUIT BOARDS PRODUCE | a critical cooling cycle before the book is removed and pulled apart. The edges of the multilayer panels are then trimmed to eliminate any of | CIRCUIT BOARDS PRODUCE | the resin outflow and to smooth out uneven or rough edges. Special attention was given to environmental compatibility and safety conditions. Furthermore, the facility was | CIRCUIT BOARDS PRODUCE | designed to accommodate future expansions. The requirements were as follows: - LP formats: Up to 640 x 610 mm - LP thickness: 0.30 – 10.0 | CIRCUIT BOARDS PRODUCE | mm - Materials: FR- 4, BT-epoxy, polyimide, “Thermount”/RCF - Heat ramp rates: 5-6°C/min. (measured as a package) Great emphasis was put on automation for stacking | CIRCUIT BOARDS PRODUCE | and for enclosed separation sheet circulation. The flow directions for ...
[ Circuit Boards Produce ]


... quickly access the services we offer, the following is a guide to the preferred requirements for producing quality Printed Circuit Boards. Can be supplied | CIRCUIT BOARDS PRODUCE | as artworks, penplots, photoplots or photoplot files, so long as the quality and registration of the images is of a standard that will enable a | CIRCUIT BOARDS PRODUCE | good quality board to be produced. Another important criteria is the presence of orientation marks within the boundary of board. These marks could be the | CIRCUIT BOARDS PRODUCE | board reference so long as it cannot be read from the other side. (This is for your protection to prevent the boards made inside out). | CIRCUIT BOARDS PRODUCE | Images should comply with design rules that will result in a board that will meet performance and cost requirements. - Scale must be given, tapes | CIRCUIT BOARDS PRODUCE | securely stuck to the backing sheet, track to pad & track to track joints complete and the backing sheet clean. - Scale must be given | CIRCUIT BOARDS PRODUCE | and be at least 2:1. Plots must also offer sharp edge definition and traces dense enough for blocking light when photographing. ...
[ Circuit Boards Produce ]


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