... and operated with the local CNC routine. Bordering takes place at the same time to remove the copper and epoxide projections from the edges | PRINTED CIRCUIT BOARDS PLANT | of the Panel and to achieve its specified dimensions Of course the layer recognition routine takes longer than a conventional CNC procedure, but it is | PRINTED CIRCUIT BOARDS PLANT | not presumptuous to claim that immediately after pressing the multi layer has the quality of a plated throug circuit The art of viewing chicken eggs | PRINTED CIRCUIT BOARDS PLANT | clearly. Although the fundamental idea appears ingeniously simple, the most sophisticated German technology was necessary to carry it out. It was extremely complicated to develop | PRINTED CIRCUIT BOARDS PLANT | a camera system which can not only see all spatial levels equally clearly, but is also able to see the lines located at different distances, | PRINTED CIRCUIT BOARDS PLANT | and to measure them. (To give some idea of the difficulty, one could compare viewing a boiled egg from above and trying to see the | PRINTED CIRCUIT BOARDS PLANT | egg cup as well as the tip of the egg clearly). The Frauenhofer Institute’s achievements in the ...
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... subsequent infrared solidification which, in turn, also calls for further investment in facilities. The potential for a lead-free alternative For a lead free altenative | PRINTED CIRCUIT BOARDS PLANT | provided the PCB manufacturer ensures optimal conditions for immersion nickel gold coating, the results of wave soldering are equally good to solder levelling. Good storage | PRINTED CIRCUIT BOARDS PLANT | ability is also achieved by covering the pad and smd sides with gold. In our opinion, however, immersion nickel / gold will never become an | PRINTED CIRCUIT BOARDS PLANT | established alternative to HAL. As already mentioned, the processing costs are the greatest handicap for this method. However, due to the lack of other alternatives | PRINTED CIRCUIT BOARDS PLANT | in the lead-free future immersion nickel / gold will retain its position in the area of fine pitch and COB applications. Cost disadvantages of the | PRINTED CIRCUIT BOARDS PLANT | immersion nickel / gold process could be balanced, in particular in the production of large series (consumer goods), if the use of chip-on-board is considered. | PRINTED CIRCUIT BOARDS PLANT | It is often worth purchasing “bare” chips ...
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... on to the panel. Foto Resist Flüssiger oder fester Film, der sich beim Belichten mit vorzugsweise UV-Licht so umwandelt, dass sich die unbelichteten oder | PRINTED CIRCUIT BOARDS PLANT | belichteten Stellen durch einen Entwickler herauslösen lassen. Unterschieden werden Positivresiste oder Negativresiste, je nach Belichtungsart mit positiver oder negativer Leiterbahnstruktur auf dem Film. Entsprechend Dicke | PRINTED CIRCUIT BOARDS PLANT | und chemischen Verhalten unterscheidet man Galvano- oder Ätzresiste. | PINHOLE | A small imperfection that penetrates entirely through the conductor. Nadelloch Nadelstichartige Löcher in Leiterbahnen | PRINTED CIRCUIT BOARDS PLANT | durch Ätzfehler, Fehlbelichtungen oder im Lötstopplack. |PINK-RING | An area of bad adhesion around an innerlayer pad Pinkring oder Redring Rot-Ring Zone schlechter Haftung, auch | PRINTED CIRCUIT BOARDS PLANT | Rotring genannt, die durch das Eindringen von Säure in die haftvermittelnde Kupferoxidschicht der Innenlagen entsteht (meist über Bohrungen). | PADF | The portion of the | PRINTED CIRCUIT BOARDS PLANT | conductive pattern on printed circuits designed for the mounting ...
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