ICプラスチックパッケージ内応力測定素子の開発とその応用

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タイトル別名
  • Development and application of the stress sensing test chip for IC plastic packages.
  • IC プラスチック パッケージナイ オウリョク ソクテイ ソシ ノ カイハツ

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A stress sending Si chip utilizing the piezoresistive effect of Si single crystals has been developed. This chip can measure 3-dimensional stress components, σx, σy, σz and shear stress τxy in the chip surface. The stress sensitivity is 0.1 MPa in the range of -100 MPa to 100 MPa. Temperature sensors are arranged in the chip and they have linear response between -100°C and 200°C. This chip is useful for the structural design and reliability tests of IC packages. The residual stress in a chip after the die bonding process is measured using this chip. It is found that rubber paste is useful in reducing stress in that process.

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