Joined structures of ceramics
AssigneeNGK Insulators, Ltd.
InventorsTomoyuki Fujii, Akiyoshi Hattori
Life of this patent
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Abstract
An object of the present invention is to provide a joined structure effective for preventing crack formation after thermal cycles. The joined structure has a ceramic member 1, a metal member 4 to be joined, and a metal fixed member 3 fixed to the ceramic member 1 and having an exposed face 3b exposed along the joining face 1d of the ceramic member 1. A joining layer 7 is provided between the ceramic member 1 and the metal member 4 and between the exposed face 3b of the fixed member 3 and the metal member 4. The joining layer 7 has thicker and thinner portions 7a and 7b. Alternatively, the joining layer 7 has a maximum thickness of 0.15 mm or more.
Claims9
A joined structure comprising:
- a ceramic member;
- a metal member to be joined having a joining face, said metal member further comprising a protrusion on said joining face, said protrusion being integrated with said metal member and being of the same material as said metal member;
- a metal fixed member fixed to said ceramic member and having an exposed face;
- and
- a joining layer provided between said ceramic member and said joining face of said metal member and between said exposed face of said fixed member and said joining face of said metal member, said joining layer comprising thicker and thinner portions, said thicker portion being thicker than said thinner portion, and said thinner portion being interposed between said protrusions and said ceramic member.
Dependencies are inferred from the claim text.