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. 02, 1993
Filed:
Apr. 07, 1992
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
The present invention consists of a sputtering target wherein target pieces made of at least two different kinds of materials are compositely arrayed in a manner as to be divided into the respective materials, characterized by having at least one irregular erosion region which is defined as a region enclosed with a circle having an erosion width as its diameter, located at a region farthest from the center of gravity of the sputtering target within a region to be eroded in a curvilinear shape, the irregular erosion region being formed at least partly of target pieces made of at least two kinds of materials having either shapes or surface areas thereof different from those of the target pieces lying outside the irregular erosion region and are compositely arrayed in a manner as to be divided into the respective materials.