US Patent 7252872 Joined structures of ceramics

Patent 7252872 was granted and assigned to NGK Insulators on August, 2007 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

NGK Insulators

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

72528720

Patent Inventor Names

Akiyoshi Hattori0

Tomoyuki Fujii0

Date of Patent

August 7, 2007

Patent Application Number

107559130

Date Filed

January 13, 2004

Patent Primary Examiner

‌

Michael E. Lavilla

Patent 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.