Pcb Fabricators The individual PCBs are kept within this Panel with milling fixing tabs of 1.5 mm

... clearances in a solder layer so that mask doesn't end up on pads. On the flip side, copper is not supposed to be exposed. | PCB FABRICATORS | The two requirements - no mask on pads and unwanted exposed copper - must be balanced. It is not easy to do. How can the | PCB FABRICATORS | designer help? Devise a standardized clearance, or set the clearances at 1:1, and let the shop do the soldermask enhancement. Here's another issue: the soldermask | PCB FABRICATORS | webbing between pads on fine-pitch surface mount devices. Most masks can go to 0.003" without the resist flaking off. However, if the pads are so | PCB FABRICATORS | tightly grouped that the dams between them are less than 0.003", it's better to construct a mask opening over the entire group. That will make | PCB FABRICATORS | the fabricator's life much simpler. Bear in mind that a fabricator's spacing tolerances likely differ from yours. For example, take the drill data. When laying | PCB FABRICATORS | out a board, you usually work with finished hole sizes. However, a fabricator must drill a hole larger than the finished one, about ...
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... the hole by at least factor 1.5. Otherwise some or all of the pads may be removed. | 11. DATA PROVIDED (DATA INCONSISTENCY) | | PCB FABRICATORS | 11.1 If drilling and measurement plans are included that do not match the drilling program or the contour according to the gerber-data, then the drilling | PCB FABRICATORS | program and the gerber-data will be binding in all cases. | 12. PCB CONTOUR | 12.1 If not otherwise stipulated, the PCB contour will be | PCB FABRICATORS | determined by the centre (=centre vector) of the contour lines provided in the order data. If Slots are represented by you by rectangular outlines, then | PCB FABRICATORS | we assume generally that the corner radius is contained. | 13. TECHNICAL SPECIFICATIONS | PRINTED CIRCUIT BOARDS | 13.1 For further technical specifications of our | PCB FABRICATORS | manufacturing processes, please refer to our Process & Capability Manual in the "Standard" category. These standard technical criteria also apply even if your manufacturing data | PCB FABRICATORS | and documents call for other features (special technical requirements are available ...
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... file in the message section. Do not forget to send your commercial order (indicating the zip file name) by E-mail or fax. 3.3 Design | PCB FABRICATORS | rule check All CAD data supplied to us are checked using a standard design rule check and customized DFM- functions, which has been drawn up | PCB FABRICATORS | in accordance with the required IPC guidelines, our capability matrix and customer´s engineers. If you have any questions regarding this issue, please contact the head | PCB FABRICATORS | of our pre-production office, Mr. Vornholt. Should the CAD data prove not to be suitable for production, the person responsible for the data will be | PCB FABRICATORS | contacted by the pre- production engineer dealing with the order. 3.4 Order confirmation After the clearance of all technical and commercial details, an order confirmation | PCB FABRICATORS | is sent to the customer. The order confirmation contains the following details (rough outline): 1. Basic technical data (dimensions of pcb; type of multilayer construction | PCB FABRICATORS | etc.) 2. Basic commercial data (ordered quantities; delivery ...
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