Yoo K Kim

US Patent:

6525892, Feb 25, 2003

Filed:

Jan 28, 2000

Appl. No.:

09/493751

Inventors:

Gary L. Dunbar - Gilroy CA
Yoo H. Kim - Laguna Niguel CA
Hanan Kupferman - Diamond Bar CA
Brian Tanner - San Jose CA
David P. Turner - Los Gatos CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11B 2736

US Classification:

360 31, 360 46, 360 68, 360 75

Abstract:

A method of calibrating a write current-setting for writing servo sectors onto a recording surface through a head in a head disk assembly of a disk drive is disclosed. A preamplifier circuit has an input for receiving a selected control signal set by a current-setting value, the preamplifier circuit causing current to flow through the head with a current magnitude determined by the current-setting value. A multiple-pass process is performed in which a series of current-setting values are set for the control signal for generating a plurality of quality metrics each indicative of a quality of the selected control signal. Each pass in the multiple-pass process includes the steps of providing a data sequence to the preamplifier circuit to cause a test pattern to be written to the recording surface, and reading the test pattern and generating and storing at least one of the plurality of quality metrics. The generated and stored quality metrics are then evaluated to select a current-setting value for the selected control signal. The selected current-setting value is then set for the head, and the servo sectors are written onto the recording surface through the head.

US Patent:

20200207771, Jul 2, 2020

Filed:

Nov 8, 2019

Appl. No.:

16/678788

Inventors:

- Foster City CA, US
Yoo Joong Kim - Saratoga CA, US
Paul A. Roethle - Berkeley CA, US
Fang Wang - Foster City CA, US

International Classification:

C07D 475/06
A61K 45/06
C07D 487/04
A61K 31/519

Abstract:

The present invention provides crystalline forms, solvates and hydrates of 4-amino-2-butoxy-8-(3-(pyrrolidin-1-ylmethyl)benzyl)-7,8-dihydropteridin-6(5H)-one, and methods of making.

US Patent:

20170313707, Nov 2, 2017

Filed:

May 10, 2017

Appl. No.:

15/591711

Inventors:

- Foster City CA, US
Brandon Heath Brown - Burlingame CA, US
Krista Marie Diaz - West Lafayette IN, US
Yoo Joong Kim - Saratoga CA, US
Paul A. Roethle - Berkeley CA, US
Valeriya Smolenskaya - West Lafayette IN, US
Fang Wang - Foster City CA, US

International Classification:

C07D 475/06
A61K 31/519
A61K 45/06
C07D 487/04

Abstract:

The present invention provides crystalline forms, solvates and hydrates of 4-amino-2-butoxy-8-(3-(pyrrolidin-1-ylmethyl)benzyl)-7,8-dihydropteridin-6(5H)-one, and methods of making.

US Patent:

20160108045, Apr 21, 2016

Filed:

Sep 14, 2015

Appl. No.:

14/853855

Inventors:

- Foster City CA, US
Brandon Heath Brown - Burlingame CA, US
Krista Marie Diaz - West Lafayette IN, US
Yoo Joong Kim - Saratoga CA, US
Paul Roethle - Berkeley CA, US
Fang Wang - Foster City CA, US
Valeriya Smolenskaya - West Lafayette IN, US

International Classification:

C07D 475/06
A61K 45/06
A61K 31/519

Abstract:

The present invention provides crystalline forms, solvates and hydrates of 4-amino-2-butoxy-8-(3-(pyrrolidin-1-ylmethyl)benzyl)-7,8-dihydropteridin-6(5H)-one, and methods of making.