... access the services we offer, the following is a guide to the preferred requirements for producing quality Printed Circuit Boards. Can be supplied as | PRINTED WIRING BOARDS 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 | PRINTED WIRING BOARDS 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 | PRINTED WIRING BOARDS 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 | PRINTED WIRING BOARDS 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 | PRINTED WIRING BOARDS FABRICATORS | stuck to the backing sheet, track to pad & track to track joints complete and the backing sheet clean. - Scale must be given and | PRINTED WIRING BOARDS FABRICATORS | be at least 2:1. Plots must also offer sharp edge definition and traces dense enough for blocking light when photographing. - ...
[ Printed Wiring Boards Fabricators ]


... - Always required even when a drill file is supplied, to enable inspection of panels immediately after drilling and finished boards prior to despatching. | PRINTED WIRING BOARDS FABRICATORS | Hole sizes must be clearly represented with distinct differences between each size. Tolerances are not required unless different to our standard of +0.1 / -0.05 | PRINTED WIRING BOARDS FABRICATORS | mm. - Preferred with overall mechanical dimensions including notches, cutouts and slots. Also preferred is a positioning (datum) dimension (drilled hole is best). Tolerances are | PRINTED WIRING BOARDS FABRICATORS | not required unless different to our standard of + / -0.25 mm. Other information required for all boards includes: board thickness (standard = 1.6mm) base | PRINTED WIRING BOARDS FABRICATORS | copper thickness (std = 18mm) solder mask colour (std = green) solder mask type (std = liquid photoimageable) component legend colour (std = white) bare | PRINTED WIRING BOARDS FABRICATORS | board testing requirement (std for multilayer and fine line production runs) Extra information required for multilayers includes: special dielectric spacing requirements (if ...
[ Printed Wiring Boards Fabricators ]


... must be processed by Tenting) 5.4 Plating and aspect ratio The thickness of copper plating is a result of exposure time and amperage in | PRINTED WIRING BOARDS FABRICATORS | the electrolytic plating process. Basically 20 to 25 µ are plated during the process on surface and in hole. Plating of thicker copper is possible | PRINTED WIRING BOARDS FABRICATORS | but it needs advisory service of the technical department. Copper clad laminate Electrolytic copper plating Final copper thickness 18 µ ca. 20 µ ca. 38 | PRINTED WIRING BOARDS FABRICATORS | µ 35 µ ca. 20 µ ca. 55 µ 50 µ ca. 20 µ ca. 70 µ 70 µ ca. 20 µ ca. 90 µ | PRINTED WIRING BOARDS FABRICATORS | 105 µ ca. 20 µ ca. 125 µ The capability of the electrolytic plating process is expressed in aspect ratio = maximum aspect ratio of | PRINTED WIRING BOARDS FABRICATORS | board thickness/smallest drilled hole diameter that can be plated. Standard Special technical limit 5,5 8 10 5.5 Exposure Our technical range of line structuring theoretically | PRINTED WIRING BOARDS FABRICATORS | reaches the level of 50µ track width due to collimated light exposure systems. But with regard to the restrictions of material quality and the copper | PRINTED WIRING BOARDS FABRICATORS | balance of the PCB-design we ...
[ Printed Wiring Boards Fabricators ]