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Study on High Reliability of Lead-Free Solder Joint on Metal Substrate

[+] Author Affiliations
Kanji Takagi, Masaki Wakabayashi, Junichi Inoue

Omron Automotive Electronics Co. Ltd., Komaki, Aichi, Japan

Qiang Yu, Takahiro Akutsu

Yokohama National University, Yokohama, Kanagawa, Japan

Paper No. IPACK2011-52044, pp. 143-148; 6 pages
doi:10.1115/IPACK2011-52044
From:
  • ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems
  • ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems, MEMS and NEMS: Volume 1
  • Portland, Oregon, USA, July 6–8, 2011
  • ISBN: 978-0-7918-4461-8
  • Copyright © 2011 by ASME

abstract

This paper proposes the high reliable design method for lead-free solder joint on metal substrate on chip component. First, the crack propagation analysis method for estimating rupture life of solder joint was constructed. And then, the effect of material properties of insulating layer on metal substrate and solder joint shape for rupture life of solder joint was evaluated using crack propagation analysis. As the result, the relation between young’s modulus of insulating layer and rupture life was indicated quantitatively. Also, the relation of filet length for rupture life of solder joint was evaluated. Secondary, evaluation method of heat dissipation for metal substrate was proposed. Because thermal conductivity of insulating layer affects temperature rise of heating device. And, the relation between thermal conductivity of insulating layer and temperature rise of heating device was indicated.

Copyright © 2011 by ASME

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