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. 10, 2013
Filed:
Sep. 19, 2011
Yasushi Tomizawa, Tokyo, JP;
Kazuo Watabe, Kanagawa-ken, JP;
Akihito Ogawa, Kanagawa-ken, JP;
Yangfang LI, Kanagawa-ken, JP;
Akihiro Koga, Tokyo, JP;
Yasushi Tomizawa, Tokyo, JP;
Kazuo Watabe, Kanagawa-ken, JP;
Akihito Ogawa, Kanagawa-ken, JP;
Yangfang Li, Kanagawa-ken, JP;
Akihiro Koga, Tokyo, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A memory device, includes a recording medium; a probe to write a plurality of the signals; a first driving portion to vibratory drive the recording medium; a detecting unit which, when the first driving portion changes a frequency to vibratory drive the recording medium, detects a change in an amplitude of the resonance drive, detects the frequency at which the amplitude becomes maximum as a resonance frequency; and a calculating unit which calculates a timing when the probe writes a plurality of the signals using the resonance frequency; wherein, the first driving portion vibratory drives the recording medium and the probe writes a plurality of the signals.