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. 21, 1994
Filed:
Feb. 09, 1993
Applicant:
Inventor:
Namiki Moriga, Itami, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257704 ; 257710 ; 257666 ;
Abstract
A semiconductor device includes: a base and a cap having sealing surfaces furnished with a structure to prevent outflow of resin on the inner side of each corner thereof; and a lead frame arranged between the sealing surfaces of the base and the cap, with a part of the lead frame extending into each corner of the sealing surfaces, whereby the generation of recesses and holes in the resin sealing portion is prevented and a high-quality semiconductor device can be obtained which provides a satisfactory production yield.