Row bar thickness measurement device, system and methods
AssigneeSeagate Technology LLC
InventorsLeping Li, Sarah R. Marotz, Kara L. Maytag
Life of this patent
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Abstract
A device and system for precise measurement of a thickness and determination of a profile of a slider row bar. The device includes a bar mount fixture having a structure for supporting the row bar by an edge, a first probe and a second probe on either side of the row bar, each probe being a non-contact sensor with a measurement precision of 0.5 micrometer, with each of the probes laterally moveable in relation to the bar mount fixture. Also included are methods of using a device for precisely measuring of a thickness and determining of a profile of a slider row bar.
Claims20
A device for measuring a thickness and determining a profile of a slider row bar, the device comprising:
- a bar mount fixture having a structure for supporting the row bar by a lower edge thereon,
- a first probe and a second probe, each probe being a non-contact sensor with a measurement precision of 0.5 micrometer, each of the probes oriented toward the structure and laterally moveable in relation to the bar mount fixture.
A device for measuring a thickness and determining a profile of a slider row bar having an ABS side, a backside surface, a trailing edge side surface, a leading edge side surface, a first end and an opposite second end, the device comprising:
- a bar mount fixture having a structure for supporting the row bar thereon, and
- a measurement unit comprising a first probe configured to be positioned proximate the ABS side of the row bar and a second probe configured to be positioned proximate the backside surface of the row bar, each sensor being a non-contact sensor with a measurement precision of 0.5 micrometer, the measurement unit laterally moveable in relation to the bar mount fixture.
A method for determining the thickness and profile of a slider row bar, the row bar having an ABS surface, a backside surface, and a thickness therebetween, the row bar further having a leading edge side surface and a trailing edge side surface, the method comprising:
- supporting the row bar on its leading edge side surface or its trailing edge side surface;
- knowing a distance between a first known point and a second known point;
- measuring a distance to the ABS surface from the first known point;
- measuring a distance to the backside surface from the second known point;
- and
- calculating the thickness of the row bar by subtracting the distance to the ABS surface from the first known point and the distance to the backside surface from the second known point from the distance between the first known point and the second known point.
Dependencies are inferred from the claim text.