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US 12,539,690 B2Granted
Joined body
AssigneeNGK Insulators, Ltd.
InventorsTomoki Nagae, Takahiro Yamadera, Kota Ozeki, Hirotomo Takahama
Life of this patent
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Abstract
A joined body includes: a first plate; a second plate of a same type as or a different type from a type of the first plate; an amorphous layer existing at a joint interface between the first plate and the second plate; a first plate alteration layer existing on a side of the first plate in contact with the amorphous layer; and a second plate alteration layer existing on a side of the second plate in contact with the amorphous layer.
Claims5
A joined body comprising:
- a first plate;
- a second plate of a same type as or a different type from a type of the first plate;
- an amorphous layer existing at a joint interface between the first plate and the second plate;
- a first plate alteration layer existing on a side of the first plate in contact with the amorphous layer;
- and
- a second plate alteration layer existing on a side of the second plate in contact with the amorphous layer,
- wherein the first plate and the second plate are both formed of dense alumina ceramic,
- wherein the surface roughness Ra of the first plate on the side of the first plate in contact with the amorphous layer is less than or equal to 1 nm, and
- wherein the surface roughness Ra of the second plate on the side of the second plate in contact with the amorphous layer is less than or equal to 1 nm.
6 more elements
Dependencies are inferred from the claim text.