Magnetic data card servo writer

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6728059
APP PUB NO 20020186495A1
SERIAL NO

10191959

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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This invention discloses a magnetic servo writer. The magnetic servo writer includes a magnetic pickup head for rotationally moving over and writing servo data in a magnetic flat data-storage medium. The magnetic servo writer further includes a clock head for providing clock signals to the pickup head and to write clock signals in the clock disk. The magnetic servo writer further includes a control circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium. The magnetic servo writer further includes a servo pattern layout circuit for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium with predefined servo patterns. The magnetic servo writer further includes a derived index control circuit for deriving indices from a fixed index provided on the magnetic flat data-storage medium. The magnetic servo writer further includes a fixed index and clock track circuit for providing a fix index and a clock signal for controlling the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium. The magnetic servo writer further includes a head move circuit for controlling a movement of the magnetic pickup head for writing the servo data on the magnetic flat data-storage medium. The magnetic servo writer further includes a medium movement circuit for controlling a linear movement of the magnetic flat data-storage medium for writing the servo data on the magnetic flat data-storage medium.

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Patent Owner(s)

Patent OwnerAddress
DCARD INC560 VALLEY WAY MILPITAS CA 95035

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
King, Francis K San Jose, CA 25 217
Liu, Jeffrey F San Jose, CA 12 89

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