Invention Grant
- Patent Title: Multi-layered composite bonding materials and power electronics assemblies incorporating the same
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Application No.: US15494090Application Date: 2017-04-21
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Publication No.: US10886251B2Publication Date: 2021-01-05
- Inventor: Shailesh N. Joshi
- Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.
- Applicant Address: US TX Plano
- Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
- Current Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
- Current Assignee Address: US TX Plano
- Agency: Dinsmore & Shohl LLP
- Main IPC: H01L23/00
- IPC: H01L23/00 ; H01L23/473 ; H01L23/04 ; H01L23/36 ; H01L25/07

Abstract:
A multilayer composite bonding material for transient liquid phase bonding a semiconductor device to a metal substrate includes thermal stress compensation layers sandwiched between a pair of bonding layers. The thermal stress compensation layers may include a core layer with a first stiffness sandwiched between a pair of outer layers with a second stiffness that is different than the first stiffness such that a graded stiffness extends across a thickness of the thermal stress compensation layers. The thermal stress compensation layers have a melting point above a sintering temperature and the bonding layers have a melting point below the sintering temperature. The graded stiffness across the thickness of the thermal stress compensation layers compensates for thermal contraction mismatch between the semiconductor device and the metal substrate during cooling from the sintering temperature to ambient temperature.
Public/Granted literature
- US20180308820A1 MULTI-LAYERED COMPOSITE BONDING MATERIALS AND POWER ELECTRONICS ASSEMBLIES INCORPORATING THE SAME Public/Granted day:2018-10-25
Information query
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