... spindle ball bearing routing maschine and cleaned prior to being released to the next stage of manufacture. CNC & Laser- Drilling-Department CNC - Driller | MULTILAYER CIRCUIT BOARDS MANUFACTURING | Guide to Documentation Requirements Images To help you quickly access the services we offer, the following is a guide to the preferred requirements for producing | MULTILAYER CIRCUIT BOARDS MANUFACTURING | quality Printed Circuit Boards. Can be supplied as artworks, penplots, photoplots or photoplot files, so long as the quality and registration of the images is | MULTILAYER CIRCUIT BOARDS MANUFACTURING | of a standard that will enable a good quality board to be produced. Another important criteria is the presence of orientation marks within the boundary | MULTILAYER CIRCUIT BOARDS MANUFACTURING | of board. These marks could be the board reference so long as it cannot be read from the other side. (This is for your protection | MULTILAYER CIRCUIT BOARDS MANUFACTURING | to prevent the boards made inside out). Images should comply with design rules that will result in a board that will meet performance and cost | MULTILAYER CIRCUIT BOARDS MANUFACTURING | requirements. - Scale must be given, tapes securely stuck to the backing sheet, track to pad & ...
[ Multilayer Circuit Boards Manufacturing ]


... to the hardest tests in the UL laboratories and they existed even the extremely heavy 130 C° long term test. That qualifies us without | MULTILAYER CIRCUIT BOARDS MANUFACTURING | reservation for the US-American and Canadian safety standards. Down you see our "Yellow Card" shown with the valid parameters for a UL marking.     A (black | MULTILAYER CIRCUIT BOARDS MANUFACTURING | triangle ) Symbol is marked on those products within a given type designation that comply with direct support of current-carrying parts performance level requirements of | MULTILAYER CIRCUIT BOARDS MANUFACTURING | UL 796. "All" is used to indicate that all base materials under that type designation comply with direct support of current-carrying parts performance level requirements | MULTILAYER CIRCUIT BOARDS MANUFACTURING | of UL 796     For use only in equipment where the acceptability of the combination is determined by Underwriter Laboratories Inc. Explanations concerning the UL certification | MULTILAYER CIRCUIT BOARDS MANUFACTURING | Clad Cond Width Min The minimum conductor width is 150 µm, except the distance of the track to the outer contour is smaller than 400 | MULTILAYER CIRCUIT BOARDS MANUFACTURING | µm. Clad Cond Width Min Edge If the distance ...
[ Multilayer Circuit Boards Manufacturing ]


... The main purpose of this treatment is to remove any epoxy smeared onto the edge of the inner layer copper pads whilst drilling. The | MULTILAYER CIRCUIT BOARDS MANUFACTURING | smear is the result of a hot drill melting the epoxy resin and spreading it across the hole wall during its up and down motion. | MULTILAYER CIRCUIT BOARDS MANUFACTURING | The epoxy smear causes poor and in some cases non electrical continuity to the innerlayers as well as poor adhesion of the plated copper to | MULTILAYER CIRCUIT BOARDS MANUFACTURING | the hole wall. In desmear, the chemical attack is designed to remove only the surface smear of resin from the hole wall, without attacking the | MULTILAYER CIRCUIT BOARDS MANUFACTURING | wall structure itself. For most needs desmearing is sufficient whilst for some military applications it is necessary to etchback 75mm for what is referred to | MULTILAYER CIRCUIT BOARDS MANUFACTURING | as 3 point contact. Etchback is a stronger chemical attack than desmearing. It is designed to remove not only the smeared resin, but also additional | MULTILAYER CIRCUIT BOARDS MANUFACTURING | resin from the wall structure and the remaining protruding glass fibres. There are various methods of desmearing and etchback available to ...
[ Multilayer Circuit Boards Manufacturing ]