Patent ID: 11871676
Assignee: NIPPON ELECTRIC GLASS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 0:
1. A hermetic package comprising a package base and a glass cover hermetically sealed with each other via a sealing material layer,
wherein the package base comprises a base part and a frame part formed on the base part,
wherein the package base has an internal device housed within the frame part,
wherein the sealing material layer is arranged between a top of the frame part of the package base and the glass cover,
wherein an end portion of the sealing material layer protrudes laterally in an arc shape in sectional view,
wherein the sealing material layer comprises a sintered body of composite powder containing at least bismuth-based glass powder and refractory filler powder, and
wherein the bismuth-based glass powder comprises as a glass composition, in terms of mol %, 28% to 60% of Bi2O3, 0% of BaO, 15% to 37% of B2O3, 1% to 30% of ZnO, 1% to 40% of CuO, and 0.1% to 10% of Fe2O3.