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. 26, 1984
Filed:
Jun. 14, 1982
Applicant:
Inventor:
Hiroshi Ohtani, Mi-Ne, JP;
Assignee:
Narumi China Corporation, Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428 35 ; 428 81 ; 428131 ; 428192 ; 428426 ;
Abstract
A ceramic substrate for use as a semiconductor package which includes a plate member having an engraved cavity portion on a first face portion thereof and having a rounded corner on a peripheral surface opposite the first face portion and having a first and second stepped crest formed along the edge formed at the boundary of a second face portion opposite said first face portion for increasing impact resistance to chipping and cracking of the ceramic substrate.