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. 07, 2009
Filed:
Mar. 07, 2008
Bruce D. Emo, Boulder, CO (US);
Brian D. Wilson, Boulder, CO (US);
Bruce D. Emo, Boulder, CO (US);
Brian D. Wilson, Boulder, CO (US);
Mobile Storage Technology, Inc., Milpitas, CA (US);
Abstract
A method of manufacturing a disk drive is disclosed in which servo information is written in tracks on a disk surface, the track width performance of the associated read/write transducer is measured, the track width performance is analyzed and a data track pitch is established. Based on the data track pitch established, a track location formula for data tracks on the surface is defined. For a disk drive with a plurality of read/write transducer-media surface combinations, a track location formula for data tracks is established for each combination. Disclosed is a method of measuring a track width performance of a read/write transducer which includes the steps of writing a first test pattern having a first waveform with the read/write transducer at location t on the surface of a magnetic medium, reading the first test pattern and measuring an error rate of the signal, followed by moving the read/write transducer in a first direction a predetermined distance from location t and writing a second test pattern comprised of a waveform different than the first waveform, moving the read/write transducer in a second direction to a position distance d from location t and writing a third test pattern comprised of a waveform different to the first test pattern. The first test pattern is read at location t and the error rate of the signal is measured. A disk drive including a disk having a first magnetic surface, a first read/write transducer associated with the first magnetic surface for reading and writing data in tracks in a plurality of zones each zone having a read/write frequency, a first load beam for supporting and positioning the first read/write transducer at a plurality of locations above the surface of the magnetic media as disclosed and the drives produced utilizing the steps of writing servo information in tracks on the surface at a track pitch, followed by measuring a track width performance of the read/write transducer and establishing a track pitch for data tracks as a function of the measured track width performance.