Patent ID: 9334154
Filing Date: 2016-05-10
CPC Classification: B81B,B81C

Claim Text:
1. A hermetically sealed package, comprising: a substrate having a surface comprising silicon; a device disposed on the surface of the substrate; a metal seal ring, disposed on the surface of the substrate about the device, the metal seal ring comprising: a bonding material disposed on the metal seal ring; wherein the bonding material has a yield strength in the same order of magnitude as the yield strength of the metal stress relief buffer layer; a lid structure; wherein the bonding material and the metal seal ring, absent the metal stress relief buffer layer, cause cracking of the surface of the substrate; and wherein the metal stress relief buffer layer extends laterally beyond at least one of an inner and outer edge of the metal seal ring a length sufficient to prevent cracking of the substrate in bonding the metal seal ring to the lid structure with the bonding material to form the hermetically sealed package.