Samsung Electronics Co., Ltd.

Jae June Kim

Jong Yun Yun

Chin Won Cho

Chang Dong Yeo

Hu Yul Bang

The invention provides a method insuring that each read channel optimization step is controllable in terms of quality divergence, that a systematic response can be made which can be readily automated. The method is applicable to a pre-existing read channel optimization (RCO) script. The method includes the following operations. Acquiring a first quality measure and a first parameter list. Performing the pre-existing RCO script creating a second quality measure and a second parameter list based upon the first parameter list. Convergence processing the first and second quality measures and parameter lists.

Method and apparatus providing read channel optimization insurance to avoid divergence in channel optimization in an assembled disk drive

Methods and apparatus are disclosed determining the presence of base line popping noise for a read head inside an assembled disk drive, as well as, determining read bias conditions for operating the read head free of base line popping noise. These further include performance evaluation of the read head for read bias conditions free of base line popping noise. They also include repairing the read head using DC write current and read bias current within the assembled disk drive.

METHOD AND APPARATUS DETECTING BASE LINE POPPING NOISE IN A READ HEAD AND STABILIZING THE MAGNETIC DOMAIN OF MERGED MAGNETORESISTIVE READ-WRITE HEADS USING DC WRITE CURRENT AND READ BIAS CURRENT FOR AN ASSEMBLED DISK DRIVE

Growing community of inventors

Sunnyvale, CA, United States of America

Jae June Kim