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


... are good. No possible soldermask flaking. Spacing between the drills is just right. You hand the data set to the fabricator, and voila! No | CIRCUIT BOARD FABRICATORS | unexpected phone calls, no changes in the layout, and the fabricator happily sends back a good set of boards on time. Our recommendations for the | CIRCUIT BOARD FABRICATORS | correct storage of PCBs and MLBs A.1 ) Brief desricption of the problem: PCB`s, especially Multilayer boards are extremly sensitive towards moisture The microscopic structure | CIRCUIT BOARD FABRICATORS | of the Multilayer material develops a strong capillary power that soaks up the humidity of the surrounding air. Even under very dry conditions it is | CIRCUIT BOARD FABRICATORS | a question of time that water accumulates in the stored PCB`s. For example: At storage conditions of 20 C° and 35 % of humidity the | CIRCUIT BOARD FABRICATORS | weight of the epoxyraisin of the Multilayer PCB`s rises 0,12 % due to the accumulation of moisture. If the capillary effect leads to an increase | CIRCUIT BOARD FABRICATORS | of more than 0,17 % a gas pressure of 8-10 bar can be reached, causing delamination Even if delamination ...
[ Circuit Board Fabricators ]


... are automatically fed into the autoexposure unit.  The panel is aligned to the top and bottom circuit films and a vacuum pump removes the | CIRCUIT BOARD FABRICATORS | air between the panel and the film. Exposure is controlled by an integrator located near the panels.The imaging process is carried out in a controlled | CIRCUIT BOARD FABRICATORS | environment to minimise the effects of temperature and humidity variation and maximise the yield of quality product. After exposure, the panel is ejected from the | CIRCUIT BOARD FABRICATORS | exposure system and loaded onto an accumulator. Developing Image After the panel has been exposed, it is finally developed to remove all areas of unexposed | CIRCUIT BOARD FABRICATORS | resist. The chemistry in the developer is controlled by an automatic replenishment system. This fully automatic system assures consistent and uniform development and eliminates down | CIRCUIT BOARD FABRICATORS | time for cleaning and replacement of the chemistry. The copper tracks and pads thus defined are then ready for the electrolytic plating process or for | CIRCUIT BOARD FABRICATORS | etching. Remaining resist acts as an etchant ...
[ Circuit Board Fabricators ]