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:
Dec. 16, 2003
Filed:
Mar. 09, 2001
Hideyuki Hashi, Osaka, JP;
Taizo Hamada, Osaka, JP;
Toshio Makabe, Kyoto, JP;
Kiyokazu Toma, Osaka, JP;
Tatsuaki Ishida, Shiga, JP;
Yasuaki Ban, Osaka, JP;
Keizo Miyata, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A magnetic transfer method which superposes on a magnetic disk surface a magnetic pattern from a master disk ( ), said master disc having on its surface a magnetic film formed so as to have an array pattern shape corresponding to a preset data signal, magnetized into the magnetic film of the master disk ( ). The master disc is used to magnetically transfer the array pattern of the data signal onto the magnetic disk as the magnetized pattern of the data signal. The method characterized comprises steps of contacting and separating, to and from a dummy disk ( ) the magnetic film-formed surface of the master disk ( ) to thereby clean the master disk ( ), and a step of superposing, after the cleaning, the master disk ( ) on the magnetic disk for effectuating the magnetic transfer.