Invention Grant
- Patent Title: Hermetically sealed package having stress reducing layer
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Application No.: US15048106Application Date: 2016-02-19
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Publication No.: US09708181B2Publication Date: 2017-07-18
- Inventor: Adam M. Kennedy , Buu Q. Diep , Stephen H. Black , Tse E. Wong , Thomas Allan Kocian , Gregory D. Tracy
- Applicant: Raytheon Company
- Applicant Address: US MA Waltham
- Assignee: Raytheon Company
- Current Assignee: Raytheon Company
- Current Assignee Address: US MA Waltham
- Agency: Daly, Crowley, Mofford & Durkee, LLP
- Main IPC: H01L21/50
- IPC: H01L21/50 ; B81C1/00 ; B81B7/00

Abstract:
A sealed package having a device disposed on a wafer structure and a lid structure boned to the device wafer. The device wafer includes: a substrate; a metal ring disposed on a surface portion of substrate around the device and a bonding material disposed on the metal ring. The metal ring extends laterally beyond at least one of an inner and outer edge of the bonding material. A first layer of the metal ring includes a stress relief buffer layer having a higher ductility than that of the surface portion of the substrate and a width greater than the width of the bonding material. The metal ring extends laterally beyond at least one of the inner and outer edges of the bonding material. The stress relief buffer layer has a coefficient of thermal expansion greater than the coefficient of expansion of the surface portion of the substrate and less than the coefficient of expansion of the bonding material.
Public/Granted literature
- US20160167959A1 HERMETICALLY SEALED PACKAGE HAVING STRESS REDUCING LAYER Public/Granted day:2016-06-16
Information query
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