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:
Oct. 24, 2006
Filed:
May. 27, 2002
Tadashi Hamada, Sakai, JP;
Shinji Fujimoto, Neyagawa, JP;
Shigetoshi Sakon, Hirakata, JP;
Takashi Kozai, Inukami-gun, JP;
Tadashi Hamada, Sakai, JP;
Shinji Fujimoto, Neyagawa, JP;
Shigetoshi Sakon, Hirakata, JP;
Takashi Kozai, Inukami-gun, JP;
Matsushita Electric Works, Ltd., Kadoma, JP;
Abstract
A razor blade is provided, which achieves improved safety in use and reduced cutting resistance to an object to be cut such as beard and hair, as compared with conventional razor blades. This razor blade can be obtained by using, as a silicon thin sheet, a single crystal silicon material such as Si wafer or a polycrystalline silicon material including relatively large silicon crystal grains, forming at least one opening in the silicon thin sheet by chemical etching, and forming a cutting edge made of silicon single crystal by ion beam etching without machining such that the cutting edge projects into the opening and has a nose radius of 0.5 μm or less, and preferably 0.1 μm or less.