Patent ID: 11865829
Assignee: SONY GROUP CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A method of manufacturing a functional element, the method comprising:
forming a first metal film on a first substrate, wherein
the first metal film includes a first buffer layer and a microcrystalline structure, and
the first buffer layer includes at least one of inorganic oxide, inorganic nitride, inorganic oxynitride, or inorganic fluoride;

forming a second metal film on a second substrate,
wherein the second metal film includes a microcrystalline structure; and

forming a buffer layer by performing heat treatment after bonding the first metal film and the second metal film, wherein
the heat treatment includes leaving the first substrate and the second substrate under an environment of 100° C. or higher and 800° C. or lower, and
the first metal film and the second metal film are oxidized based on the heat treatment.