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:
Mar. 31, 1981
Filed:
Sep. 28, 1978
Applicant:
Inventor:
Hiroshi Gamo, Itami, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 55 ; 29583 ; 357 38 ; 357 56 ;
Abstract
A semiconductor wafer is provided with a plurality of semiconductor pellets arranged in rows and columns in a checkered pattern on its main opposite faces. A groove in the form of a closed loop is disposed around each pellet on one of the main faces and is spaced from grooves encircling the adjacent pellets to leave a grid between the pellets, and grooves are disposed on the other main face which simply separate the pellets. All the grooves are covered with glass passivation layers. The wafer is divided into the semiconductor pellets by dicing it along the central lines of the bars forming the grid.