The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 2003
Filed:
Jan. 02, 2001
Kyocera Corporation, Kyoto, JP;
Abstract
A ceramic heater including a ceramic body and a heating element buried in the ceramic body under the surface of thereof is provided, wherein metal pads are disposed on the outside of the ceramic body and electrically connected to the heating element, outer leads are joined by a braze layer onto a metal plated layer covering each of the pads, and the braze layer contains an amount of 500 ppm or less by weight of palladium in a brazing metal material based on Au, Cu, or Ni. The plated layer may be formed on the surface of the metal pads which have been activated with an activating solution containing an amount of 90 ppm of less by weight of Pd, in order to reduce the Pd content as defined above in the braze layer, preventing the braze layer from being cracked and enhancing the useful life of the ceramic heater.