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:
Apr. 25, 2006
Filed:
Feb. 10, 2004
Kiyoshi Hasegawa, Yokohama, JP;
Masahiko Iizumi, Fujisawa, JP;
Masahiro Omata, Yokohama, JP;
Takashi Ogino, Yokohama, JP;
Tomohiro Kondo, Mishima, JP;
Kazuo Takeda, Odawara, JP;
Takafumi Watanabe, Yokohama, JP;
Yoshiyuki Chida, Yokohama, JP;
Yasushi Matsushita, Yokohama, JP;
Kiyoshi Hasegawa, Yokohama, JP;
Masahiko Iizumi, Fujisawa, JP;
Masahiro Omata, Yokohama, JP;
Takashi Ogino, Yokohama, JP;
Tomohiro Kondo, Mishima, JP;
Kazuo Takeda, Odawara, JP;
Takafumi Watanabe, Yokohama, JP;
Yoshiyuki Chida, Yokohama, JP;
Yasushi Matsushita, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A lapping apparatus lapping a work having a pre-machined surface comprises a lapping film which includes a thin substrate having a surface provided with abrasive grains, a shoe disposed at a back surface side of the lapping film, a shoe driving unit which drives the shoe toward the work in order to press the abrasive-grained surface of the lapping film to the pre-machined surface of the work, a rotational driving unit which drives the work rotationally, a detecting unit which detects the position of the rotating work in the rotating direction, and a controlling unit which controls the pressing force of the shoe driving unit so as to drive the shoe correspondingly to the position of the work in the rotating direction during machining.