Characterization of plastic and creep behavior in thick aluminum wire for power modules
| Autor: | Yuto Kumagai, Noriyuki Miyazaki, Nobuyuki Shishido, Yutaka Hayama, Toru Ikeda, Yoshiki Setoguchi, Masaaki Koganemaru |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Wire bonding Materials science 020208 electrical & electronic engineering Constitutive equation Strain energy density function 02 engineering and technology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Finite element method Surfaces Coatings and Films Electronic Optical and Magnetic Materials Stress (mechanics) Creep Power module 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Composite material Safety Risk Reliability and Quality Tensile testing |
| Zdroj: | Microelectronics Reliability. 123:114185 |
| ISSN: | 0026-2714 |
| DOI: | 10.1016/j.microrel.2021.114185 |
| Popis: | One of the common reliability concern on most of power modules is a failure of its bonding. Stress, strain, and displacement fields around those bonding in power modules are required for highly-reliable design based on physically/mechanically based failure model. They can be accurately obtained from CAE tools such as finite element computer codes for stress analysis with mechanical properties of materials not only in the elastic region but also in the inelastic region. In this paper, for the reliability study of an aluminum bonding wire, an experimental study was performed to acquire its plastic and creep characteristics. The temperature-dependent constitutive equations for plastic and creep behavior of an aluminum wire are presented based on the isothermal tensile test data. These constitutive equations can be used at the temperatures ranging from 20 °C to 250°C, and are useful for estimating fatigue life predictions of bonding wires, when we utilize the failure models based on the physical quantities such as the inelastic strain range, the inelastic strain energy density range, the nonlinear fracture mechanics parameter T* range and so on. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect