PCB Via Quiz

by | Aug 18, 2020 | 9 comments

The miniaturization of electronic devices was made possible thanks to the advancements in PCB via technology. Manufacturers get a bit dizzy when PCB designers don’t follow the rules concerning their via specs. Find out how well you know about this topic in this PCB via quiz.

 

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#1. What is the ideal aspect ratio for microvia?

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#2. Why is a smaller aspect ratio better for vias?

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#3. What is the main difference between plated holes (PTH) and non-plated holes (NPTH)?

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Different Types of PCB Vias

#4. Which via should be used to save space on the outer layers of a PCB?

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#5. Which of these statements about via hole drilling is false?

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Annular Ring

#6. What is the name of the pad around the hole in a via?

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#7. According to IPC standards, the diameter of buried and blind vias should be:

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Via In Pad

#8. What is the main reason to choose via-in-pad over conventional vias?

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via in pad

#9. Why does via-in-pad require a non-conductive epoxy fill?

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#10. When do you implement back-drilling?

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#11. Which of the following is not part of the PCB via finish process?

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#12. What is the purpose of DFM?

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#13. What is the difference between vias and pads?

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#14. What is the IPC standard for via size and tolerance?

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#15. Choose the correct statement for thermal vias.

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#16. Which of the following is a wrong statement regarding thermal management?

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#17. Select the standard that governs via construction in flex PCBs.

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#18. Which of the following is not a filling technique used to fill stacked vias?

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#19. Which is the cost-effective way to connect microvias from one layer to another?

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Any layer via structure

#20. Name the via structure used in the picture.

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#21. Which of the following is a wrong statement about vias used in flex PCBs?

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#22. Name the routing method where a via is offset from the pad and placed at the center of four pads.

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#23. What is the difference between via stitching and via shielding?

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#24. Which is not a function of via stitching?

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9 Comments

  1. Amba Prasad
    Amba Prasad on August 4, 2020 at 9:15 PM

    Thanks For Sierra Circuits For Keeping Technical Content Running.

    Reply
  2. Amba Prasad
    Amba Prasad on August 4, 2020 at 9:17 PM

    Thanks for Sierra Circuits in keeping Technical Content running

    Reply
  3. Bill Robinson
    Bill Robinson on September 9, 2020 at 8:28 AM

    It appears that I have a lot to learn about via’s!! Thanks for the test, it is very interesting to see what you are doing.

    Reply
  4. Patrick R Singh
    Patrick R Singh on September 9, 2020 at 10:45 AM

    Thank you for keeping Technical Content running and now I need to read more on DFM Handbook

    Reply
  5. Patrick Singr
    Patrick Singr on September 9, 2020 at 11:34 AM

    Thank you

    Reply
  6. Dave
    Dave on September 9, 2020 at 2:39 PM

    Fun quiz

    Reply
  7. Anonymous
    Anonymous on September 10, 2020 at 8:51 AM

    Good Quiz

    Reply
  8. Stephen Surtees
    Stephen Surtees on January 5, 2021 at 3:29 PM

    Question 13 – answer should be 2 (not 4) – as with smaller Rs and Cs the actual pads will be a lot smaller than HDI pads, hence you cannot place them onto a part smaller than 0201(imp).

    Reply
    • Yadav Venugopal
      Yadav Venugopal on January 11, 2021 at 8:59 AM

      Hi Stephen,

      Thank you for your comment. We have corrected the answer to question 13 as option 2.

      Regards,
      Yadav

      Reply

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