Questions & Answers
Frequently asked questions and answers about circuit boards, assembly, services and technologies
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Questions & answers about circuit boards, assembly and technologies

Here you can find several frequently asked questions and answers about our printed circuit boards. You may browse through the categories or use the search. If your question remains unanswered, please contact us by email, phone or contact form. We will reply you as soon as possible.

FAQ:

  1. What do I have to consider to achieve the highest ductility possible for flexible printed circuits (FPC)?

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  2. Is it possible to apply plated-through drillings throughout the flexible printed circuits (FPC)?

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  3. Is it possible to mount SMDs onto flexible printed circuits (FPC)?

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  4. Is it possible to carry out double-sided FPCs with Leiton Flex?

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  5. Is it possible to carry out flexible multi-layer FPC with Leiton Flex?

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  6. May flexible printed circuits (FPC) be buckled?

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  7. Is a soldering mask lacquer applied onto flexible printed circuits (FPC)?

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  8. Which surface materials can be chosen for flexible printed circuits (FPC)?

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  9. What is the Tg of Flex-boards?

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  10. Are flexible printed circuit boards UL-compliant?

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  11. Are polyimide and Kapton identical?

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  12. What is the maximum operating temperature of flexible PCBs with polyimide foil?

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  13. What is polyimide?

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  14. Can flexible printed circuit boards be used for high-frequency applications?

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  15. What is the value for the dielectricity constant of flexible polyimide foils?

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  16. What is the value for voltage resistance of polyimide?

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  17. What is the value of leakage resistance (CTI) of polyimide?

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  18. Is specialised machinery required for the fabrication of flexible PCBs?

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  19. Which mechanical procedures can be applied when fabricating flexible PCBs?

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  20. Is it possible to order production-run amounts when I am satisfied with the fabricated prototypes?

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  21. Does polyimide have any disadvantages?

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  22. What are the delivery periods for flexible printed circuit boards?

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  23. Where are most of the flexible PCBs applied?

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  24. Are flexible PCBs RoHS-compliant?

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  25. How thin are flexible printed circuits (FPC)?

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  26. How thick is the copper layer on flexible printed circuits (FPC)?

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  27. Which base materials are used for Flex-PCBs?

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  28. Is it recommendable to apply tear-drops for connecting the pads?

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  29. Can circuit paths be placed at will on FPCs?

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  30. Do I have to consider certain directions or angles for placing circuit paths on flexible PCBs?

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  31. Can I be creative in designing the layout of flexible printed circuit boards?

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  32. What are the advantages of flexible printed circuits (FPC)?

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  33. What has to be considered in designing the layout of flexible printed circuits?

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Additional information about Printed Circuit Boards (PCBs):
  • wikipedia.org
    Online Encyclopedia - Topic PCBs
  • www.vde.com
    VDE - Verband Elektrotechnik Elektronik Informationstechnik e.V.
  • www.vdi.de
    VDI - Verein deutscher Ingenieure
  • www.zvei.de
    ZVEI - Zentralverband Elektrotechnik- und Elektronikindustrie e.V.
  • www.leuze-verlag.de
    Leuze Verlag - Literature about PCBs and PCB production
  • www.elektronikpraxis.vogel.de
    Elektronik Praxis - Magazine covering electronics in general and news in the PCB production industry.
  • www.elektor.de
    Elektor - Electronics Magazine with manuals and layouts for home made PCBs and PCBAs
  • www.ibfriedrich.com (Target 3001)
    The Engineering office Friedrich has been developing layout and CAD software for PCB design and Application Oriented Special Integrated Circuits (ASICs) since 1989.
  • www.cadsoft.de
    CadSoft offers user-friendly, powerful, and inexpensive solutions for PCB designs including circuit diagrams, layouts, and autorouting routines.
  • https://news.google.de/news
    Worldwide news about Printed Circuit Boards (PCBs)
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UL approvals for various types of circuit boards
  • UL for rigid FR4 PCBs
  • UL for flexible circuit boards
  • UL for aluminum IMS boards