Magnetic data card servo writer

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6417980
SERIAL NO

09289427

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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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