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. 20, 2007
Filed:
Dec. 31, 2002
Masahiko Sakamoto, Tokyo, JP;
Koichi Sugimoto, Tokyo, JP;
Katsutoshi Kamakura, Tokyo, JP;
Masahiro Otani, Tokyo, JP;
Yasushi Kawashima, Tokyo, JP;
Isamu Higashioka, Tokyo, JP;
Masaru Imaizumi, Tokyo, JP;
Osamu Murakami, Tokyo, JP;
Masahiko Sakamoto, Tokyo, JP;
Koichi Sugimoto, Tokyo, JP;
Katsutoshi Kamakura, Tokyo, JP;
Masahiro Otani, Tokyo, JP;
Yasushi Kawashima, Tokyo, JP;
Isamu Higashioka, Tokyo, JP;
Masaru Imaizumi, Tokyo, JP;
Osamu Murakami, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A code disk for a high-resolution encoder that can detect an absolute position and a method for manufacturing a mold to produce the code disk are provided. The code disk is formed by using transparent substrate. The code disk includes a plurality of tracks provided on the transparent substrate and an area provided between the plurality of tracks. Each surface of the plurality of tracks has a different pattern. A level of the area is different from that of the each surface of the plurality of tracks. The method for manufacturing the mold includes steps of processing a plurality of tracks with a flat surface on material; processing an area with a level different from that of each surface, between the plurality of tracks; forming different patterns on the each surface; plating the first material; and peeling plating from the first material to obtain a mold.