Macro- and Micro-Deformation Behavior of Sintered-Copper Die-Attach Material
| Autor: | Tomohisa Suzuki, Toshiaki Morita, Takeshi Terasaki, Dai Ishikawa, Kawana Yuki, Hideo Nakako, Kazuhiko Kurafuchi, Yusuke Yasuda, Masato Nishimura |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.product_category chemistry.chemical_element Sintering 02 engineering and technology 01 natural sciences Electronic mail Condensed Matter::Materials Science Condensed Matter::Superconductivity 0103 physical sciences Ultimate tensile strength Physics::Chemical Physics Electrical and Electronic Engineering Composite material Safety Risk Reliability and Quality Porosity Tensile testing 010302 applied physics 021001 nanoscience & nanotechnology Copper Computer Science::Other Electronic Optical and Magnetic Materials chemistry Physics::Accelerator Physics Die (manufacturing) Deformation (engineering) 0210 nano-technology business |
| Zdroj: | IEEE Transactions on Device and Materials Reliability. 18:54-63 |
| ISSN: | 1558-2574 1530-4388 |
| DOI: | 10.1109/tdmr.2017.2787756 |
| Popis: | Macro- and micro-deformation properties of sintered copper die-attach material were evaluated. The macro-deformation properties are the properties, including the contribution of voids, and the micro-deformation properties are the properties, excluding the contribution of voids. Macro-deformation properties were evaluated by tensile tests at room temperature along with finite-element analysis (FEA). The specimens for these tests were made by sintering copper-oxide nano particles in the form of paste in a hydrogen atmosphere under low and high pressures. The micro-deformation properties were estimated by tensile test and FEA using a model that reproduces the micro-porous structure obtained from processing focused-ion beam scanning electron microscope data. The micro-stress/strain curve estimated for sintered copper was found to lie above the sintered silver and below the bulk copper. The porosity dependency of the macro-deformation properties of sintered copper was calculated using FEA models and the estimated micro-deformation property. The results obtained show that the macro-deformation properties of sintered copper are higher than those of sintered silver with similar porosity. This suggests that sintered copper die-attach material requires a lower sintering pressure than for sintered silver to achieve the same strength. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|