Method to stress relieve a magnetic recording head transducer utilizing ultrasonic cavitation

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United States of America Patent

PATENT NO 9242340
SERIAL NO

13797746

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Abstract

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Magnetic heads are fabricated by slicing and dicing wafers into row bars, which undergo frontside lapping and backside lapping. These lapping processes, as well as other processes, induce stresses on the row bars that are released prior to finalizing the magnetic head. Ultrasonic impact technology is used to release the stress in the row bars and to clean the row bars at the same time. Ultrasonic impact technology is used after the row bars have been wire bonded without having to de-bond the row bars.

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Patent Owner(s)

  • WESTERN DIGITAL TECHNOLOGIES, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brothers, Alan H Amphur Mueang, TH 3 8
Moravec, Mark D Lamlukka, TH 18 644
Taechangam, Phanphat Yannawa, TH 1 1

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