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. 25, 2007
Filed:
Sep. 16, 2005
Kiyoshi Yamada, Funabashi, JP;
Hirofumi Takei, Honjou, JP;
Masami Kamada, Oodate, JP;
Toshinori Eba, Obanazawa, JP;
Kiyoshi Yamada, Funabashi, JP;
Hirofumi Takei, Honjou, JP;
Masami Kamada, Oodate, JP;
Toshinori Eba, Obanazawa, JP;
Dowa Mining Co., Ltd., Tokyo, JP;
Abstract
A method of producing a sintered rare earth magnetic alloy wafer comprises a step of using a cutter to slice a wafer of a thickness of not greater than 3 mm from a sintered rare earth magnetic alloy having ferromagnetic crystal grains surrounded by a more readily grindable grain boundary phase and a step of surface-grinding at least one cut surface of the obtained wafer with a grindstone to form at a surface layer thereof flat ferromagnetic crystal grain cross-sections lying parallel to the wafer planar surface. The method enables high-yield production of a sintered rare earth magnetic alloy wafer having flat surfaces.