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:
Sep. 10, 1991
Filed:
Oct. 11, 1989
Yasuhiko Akao, Fuchi, JP;
Takehiro Sakurai, Fuchi, JP;
Anelva Corporation, Tokyo, JP;
Abstract
Magnetron discharge type sputtering apparatus for sputtering a target with plasma. The apparatus comprises a flat target, a magnetic field application unit disposed in the vicinity of the back surface of said target and rotating means for rotating a magnetic field provided on the surface of the target by said magnetic field application unit. The magnetic field application unit is constructed such that erosion produced in the target by the sputtering tends to be deeper at an edge portion of an erosion area than at a central portion thereof. Further, there is disclosed a method of magnetron plasma discharge type sputtering of a flat target, wherein erosion produced in the target by the sputtering tends to be deeper at an edge portion of the target than at a central portion thereof.