SLVAFH0 December   2023 CSD13201W10 , CSD13302W , CSD13303W1015 , CSD13306W , CSD13380F3 , CSD13381F4 , CSD13383F4 , CSD13385F5 , CSD15380F3 , CSD17381F4 , CSD17382F4 , CSD17483F4 , CSD17484F4 , CSD17585F5 , CSD18541F5 , CSD22202W15 , CSD22204W , CSD22205L , CSD22206W , CSD23202W10 , CSD23203W , CSD23280F3 , CSD23285F5 , CSD23381F4 , CSD23382F4 , CSD25202W15 , CSD25211W1015 , CSD25213W10 , CSD25304W1015 , CSD25480F3 , CSD25481F4 , CSD25483F4 , CSD25484F4 , CSD25485F5 , CSD25501F3 , CSD75207W15 , CSD75208W1015 , CSD83325L , CSD85302L , CSD86311W1723 , CSD87501L

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Solving Assembly Issues with Chip Scale Power MOSFETs
  5. 2Land Grid Array (LGA) MOSFET Packaging Technology
  6. 3Wafer Level Chip Scale Packaging Technology
  7. 4Common Issues
  8. 5Best Practices
  9. 6Considerations When There are Problems
    1. 6.1 Tilted or Misaligned Packages
    2. 6.2 Solder Balls, Poor, or no Solder
    3. 6.3 Chipped or Cracked Devices
  10. 7Summary
  11. 8References

Common Issues

Common problems reported by customers include misalignment, tilting, poor/no solder joint, solder balls and chipping/cracking of the device. Figure 4-1, Figure 4-2, and Figure 4-3 show examples of common assembly issues.

GUID-20221005-SS0I-DVZL-TXH4-6NFRPNF7Q4C2-low.jpg GUID-20221005-SS0I-P2ZP-MDQK-DCHMJDXQVSL0-low.jpg GUID-20221005-SS0I-L9XS-NRSZ-CGF6CFTXZHJR-low.jpg

Figure 4-1 Examples of Tilted Packages Post Reflow

GUID-20221005-SS0I-CRHN-DF8J-FHLB6CDSJT3K-low.jpg GUID-20221005-SS0I-RC4Z-2WCH-ZXCQJKT3JXRG-low.jpg GUID-20221005-SS0I-BMWL-QL2L-4KPKV3R3PRFQ-low.jpg

Figure 4-2 Examples of Chipped Packages

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Figure 4-3 X-ray Images of Solder Balls