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:
Nov. 17, 2009
Filed:
Aug. 04, 2004
Masaki Yamamoto, Nara, JP;
Go Mori, Nara, JP;
Hideharu Tajima, Izumi, JP;
Nobuyuki Takamori, Kitakatsuragi-gun, JP;
Michinobu Mieda, Shiki-gun, JP;
Masaki Yamamoto, Nara, JP;
Go Mori, Nara, JP;
Hideharu Tajima, Izumi, JP;
Nobuyuki Takamori, Kitakatsuragi-gun, JP;
Michinobu Mieda, Shiki-gun, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
By using an existing, relatively inexpensive manufacturing device, micropatterns (e.g. guiding grooves, prepits) having such track pitch and pit pitch that are smaller than the diameter of a light spot are formed more finely. There are provided at least two layers, i.e. (i) a resin substrate and (ii) a depressed part inducing layer made of dielectric material or metal oxide. A light beam is radiated and focused onto the depressed part inducing layer so as to form pit parts and/or guiding grooves on irradiated parts of the resin substrate. The depressed part inducing layer is then removed, so as to expose the pit parts and/or guiding grooves.