Effect of Loading Type on Fatigue Lifetime of Sintered-Silver Die Attach
| Autor: | Hideo Nakako, Toshiaki Morita, Kazuhiko Kurafuchi, Takeshi Terasaki, Tomohisa Suzuki, Yusuke Yasuda, Kawana Yuki, Dai Ishikawa, Masato Nishimura |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science business.product_category 02 engineering and technology Type (model theory) 021001 nanoscience & nanotechnology 01 natural sciences Temperature measurement Electronic Optical and Magnetic Materials Compression load Stress (mechanics) 0103 physical sciences Air atmosphere Die (manufacturing) Electrical and Electronic Engineering Composite material 0210 nano-technology Safety Risk Reliability and Quality business Strain gauge Tensile testing |
| Zdroj: | IEEE Transactions on Device and Materials Reliability. 18:350-358 |
| ISSN: | 1558-2574 1530-4388 |
| DOI: | 10.1109/tdmr.2018.2847638 |
| Popis: | The effect of loading type on the fatigue lifetime of sintered-silver die attach was investigated. The fatigue lifetime was measured by fatigue testing with micro-load testing equipment. The fatigue tests were conducted under displacement control with (reversed loading (stress ratio ${R}= -1$ ), pulsating-tensile loading ( ${R} =0$ ), and pulsating-compression loading ( ${R} = -\infty $ )) at room temperature. The strain of the fatigue test was estimated by strain-displacement relation obtained from previous tensile test using the strain gauge. Sintered-silver specimens were made from prebaked microscale silver paste and pressurized at 10 MPa for 10 minutes in air atmosphere at 573 K. The fatigue lifetime of reversed-loading case was 1000 cycles, that of pulsating-tensile-loading case was 4000 cycles, and the pulsating-compression-loading case remained unbroken. This suggests that compression load does not contribute to the destruction of the sintered silver. These measured fatigue lifetimes were aligned in a row when these are organized by maximum stress (tensile stress range). For fatigue lifetime evaluation of sintered silver, evaluation focusing on tensile stress seems to be important. |
| Databáze: | OpenAIRE |
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