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. 20, 2004
Filed:
Jul. 03, 2001
Hironori Mine, Nagano, JP;
Fuji Electric Co., Ltd., , JP;
Abstract
In the case where a magnetic transfer process is used to record a specific magnetic pattern during the magnetic disk manufacturing process, a read/write tester for conducting a glide height test and a read/write test and a particle testing means are provided at the front section of a magnetic transfer device. The tester records a specific magnetic pattern onto a magnetic disk in a magnetic transfer method. An optical testing device, a read/write tester for conducting a glide height test, and a read/write test in sampling are provided at the rear section of the device. This enables the detection of consecutive disk abnormalities caused by particles, which are adhered a master disk or put between the magnetic disk and the master disk. A transfer quality control device collects the results of the respective tests, so that the quality can be controlled using the results. Accordingly, the present invention assures the desired quality of a magnetic disk produced after transfer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile