Seagate Technology Incorporated

BengSee Lim

Kevin Arthur Gomez

Qiang Bi

Niroot Jierapipatanakul

WaiOnn Chee

Jimmy Pang

BoonSeng Ong

Jimmy Tze Ming Pang

PeiKoh Lee

Stephen Kow Chiew Kuan

MengEng Lye

An apparatus and method for mounting a shock sensor to the printed circuit board (PCB) of a disc drive are provided. In particular, the present invention allows the shock sensor to be mounted at any location on the printed circuit board rather than being limited to placement adjacent a mounting screw. The present invention includes a clamping mechanism for rigidly clamping the PCB to the head disc assembly (HDA) so that any shock is properly transmitted from the HDA to the PCB and then to the shock sensor. In one exemplary embodiment, the PCB is clamped between a shield and the HDA. The shock sensor is then position near the point at which the PCB is clamped so that the point of clamping provides transmission of any shock in the Z-axis to the shock sensor. Shocks in the X-Y axis direction are transmitted via the normal mounting screws.

Data storage device with shock sensor mounted on circuit board and provided adjacent shield and disc assembly protrusions

A method of calibrating magnetoresistive (MR) head geometry for a product head in a selfservo writing disc drive includes the steps of writing a first burst at an inner diameter of a disc surface using the write head of the product head. Next, the first burst is read using the MR read head of the product head, and a first read amplitude of the first burst is determined. From the first read amplitude of the first burst, it is determined which one of a multiple different sets of subsequent inner diameter steps to perform. Then, the one of the multiple different sets of subsequent inner diameter steps is performed to determine a read head width, a write head width, and a read-write offset between the read head and the write head.

Method for calibrating MR head geometry in selfservo writing disc drives

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Singapore, Singapore

BengSee Lim