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Evaluation of Fatigue Strength for Solder Joints on NSMD Pads in Electronic Packages(<Special Issue>Thermal and Mechanical Reliability of Electronic Device and Mechanical Engineering)
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- NAKA Yasuhiro
- Mechanical Engineering Research Laboratory, Hitachi, Ltd.
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- YAGUCHI Akihiro
- Mechanical Engineering Research Laboratory, Hitachi, Ltd.
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- TANIE Hisashi
- Mechanical Engineering Research Laboratory, Hitachi, Ltd.
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- KIMOTO Ryosuke
- (株)ルネサステクノロジ生産本部
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- YAMAMOTO Kenichi
- (株)ルネサステクノロジ生産本部
Bibliographic Information
- Other Title
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- 半導体パッケージNSMDはんだ接続部の疲労強度評価(<小特集>電子機器の熱・機械信頼性と機械工学)
- 半導体パッケージNSMDはんだ接続部の疲労強度評価
- ハンドウタイ パッケージ NSMD ハンダ セツゾクブ ノ ヒロウ キョウド ヒョウカ
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Description
We developed a method for evaluating the life of solder joints for an electronic package with non-solder-mask-defined (NSMD) solder pads. Generally, the thermal-cycling life of a package with NSMD pads is longer than that of a package with solder-mask-defined (SMD) pads, which are usually used in packages. However, the fractural mechanism of joints on NSMD pads has not been sufficiently investigated. Therefore, we conducted mechanical fatigue tests on the joints of NSMD pads. We found that the crack propagation behavior in NSMD joints is different from that in SMD, and found that the difference of that behavior causes the life span of NSMD joints to be longer than that of SMD. In addition, we found that the life of a package with NSMD pads can be predicted from the strain in the solder bumps that is analyzed by using a finite element method, which compares the relationships between the strain and life span in the mechanical test data, although the relationship between the strain and life in NSMD joints is different from that in SMD.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 75 (755), 807-814, 2009
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390001204477212928
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- NII Article ID
- 110007339917
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- NII Book ID
- AN0018742X
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- ISSN
- 18848338
- 03875008
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- NDL BIB ID
- 10388513
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed