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:
Jun. 13, 2000
Filed:
May. 29, 1998
Applicant:
Inventors:
Assignee:
Denso Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
29611 ; 29619 ; 219552 ; 219542 ; 338254 ;
Abstract
Several heater patterns are printed on a ceramic green sheet for substrates, and the ceramic green sheet is laminated with a ceramic green sheet for cover plates, thereby forming a lamination body. Then, the lamination body is cut so that it is divided into several intermediate bodies, each of which holds a corresponding one of the heater patterns therein and has a side surface on which a terminal portion of the heater pattern is exposed. Then, the intermediate body is baked. As a result, a ceramic heater composed of a heater substrate holding the heater pattern and a cover plate disposed on the heater substrate to cover the heater pattern can be provided without any micro-cracks therein.