Glide test slider having electrically isolated piezoelectric crystal for improved noise suppression
First Claim
Patent Images
1. A glide height test slider for detecting irregularities on a surface of a rotatable disc comprising:
- a slider body;
means for sensing vibration of the slider body due to irregularities on the surface of a rotatable disc; and
means for electrically isolating the slider body means for sensing vibration from the rotatable disc, including means for electrically isolating the slider body from the surface of the rotatable disc.
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Abstract
A high resolution, low noise glide height test slider is provided to detect irregularities on a surface of a rotatable disc. A slider body is arranged to be supported by a support structure in predetermined spaced relation to the surface of the disc as it is rotating. A piezoelectric element on the slider body senses vibration forces acting on the slider body. The slider is electrically isolated from external noise sources.
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Citations
18 Claims
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1. A glide height test slider for detecting irregularities on a surface of a rotatable disc comprising:
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a slider body; means for sensing vibration of the slider body due to irregularities on the surface of a rotatable disc; and means for electrically isolating the slider body means for sensing vibration from the rotatable disc, including means for electrically isolating the slider body from the surface of the rotatable disc.
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2. A high resolution, low noise glide height test slider for detecting irregularities on a surface of a rotatable disc, comprising:
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a slider body arranged to be supported by a support structure in predetermined spaced relation to the surface of the disc as it is rotating; a piezoelectric element on the slider body to sense vibration forces acting on the slider body; and means on the slider for electrically isolating the piezoelectric element from the rotatable disc, including means for electrically isolating the slider body from the surface of the rotatable disc. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. A high resolution, low noise glide height test slider for detecting irregularities on a surface of a rotatable disc, comprising:
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a slider body arranged to be supported by a support structure in predetermined spaced relation to the surface of the disc as it is rotating; a piezoelectric element attached to the slider body to sense vibration forces acting on the slider body; isolation means for electrically isolating the piezoelectric element from external electrical noise from the support structure and the surface of the disc; and a differential preamplifier electrically connected to first and second sides of the piezoelectric element. - View Dependent Claims (11, 12, 13)
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14. A high resolution, low noise glide height test slider for detecting irregularities on a surface of a rotatable disc, comprising:
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a slider body arranged to be supported by a support structure over the surface of the rotatable disc; a piezoelectric element between the slider body and the support structure to sense vibration forces acting on the slider body; and isolation means for electrically isolating the piezoelectric element from external electrical noise from the surface of the rotatable disc and from the support structure; and a differential preamplifier electrically connected to first and second sides of the piezoelectric element. - View Dependent Claims (15, 16, 17, 18)
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Specification