Article: California Inventors Develop Disk Drive Voice Coil Motor Yoke Assembly

ALEXANDRIA, Va., June 2 -- Joseph Chang and Lam Tran, both of San Jose, Calif., and Tho Pham of Milpitas, Calif., have developed a voice coil motor assembly.

According to the U.S. Patent & Trademark Office: "The invention includes a yoke assembly containing a top and a bottom proximity latch magnet. The invention includes a voice coil attached to a voice coil bias steel. The crash stop includes a magnetic proximity latch created by the voice coil bias steel attracted to the top and bottom proximity latch magnets. It may also include using the magnetic proximity latch with a magnetically weakened contact latch. Experiments have shown that the combined magnetic proximity latch and the ...

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