Thin film servo head apparatus with canted servo gaps
First Claim
1. A thin film servo head apparatus positioned in a transverse direction of a magnetic tape moving over the thin film servo head apparatus, the apparatus comprising:
- a first thin film servo head formed on a substrate, the first thin film servo head including a first servo gap; and
a second thin film servo head formed on the substrate, the second thin film servo head including a second servo gap substantially parallel to the first servo gap, and wherein the substrate is canted relative to the transverse direction of the magnetic tape such that the first and second servo gaps are non-parallel to the transverse direction.
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Accused Products
Abstract
A thin film servo head apparatus is described that provides verification of time-based servo marks on a magnetic tape. The thin film servo head apparatus includes a plurality of thin film servo heads formed in a substrate. The substrate is canted such that servo gaps included in each of the thin film servo heads are substantially parallel to the time-based servo marks. Thin film servo heads eliminate the high labor, low yield machining process associated with conventional ferrite composite servo heads. Thin film servo heads may be fabricated in bulk on substrate wafers to reduce manufacturing time and cost. The invention described herein enables thin film servo heads to be used with time-based servo markings by defining a servo gap spacing such that when the substrate is canted, the servo gaps of the thin film servo heads substantially align with the time-based servo markings.
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Citations
20 Claims
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1. A thin film servo head apparatus positioned in a transverse direction of a magnetic tape moving over the thin film servo head apparatus, the apparatus comprising:
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a first thin film servo head formed on a substrate, the first thin film servo head including a first servo gap; and
a second thin film servo head formed on the substrate, the second thin film servo head including a second servo gap substantially parallel to the first servo gap, and wherein the substrate is canted relative to the transverse direction of the magnetic tape such that the first and second servo gaps are non-parallel to the transverse direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a magnetic tape comprising servo bands with servo marks oriented non-parallel to both a down tape direction and a transverse direction; and
a thin film servo head apparatus positioned in the transverse direction of the magnetic tape moving over the thin film servo head apparatus, the apparatus comprising;
a first thin film servo head formed on a substrate and including a first servo gap corresponding to a first servo band on the magnetic tape, and a second thin film servo head formed on the substrate and including a second servo gap substantially parallel to the first servo gap and corresponding to a second servo band on the magnetic tape, and wherein the substrate is canted relative to the transverse direction of the magnetic tape such that the first and second servo gaps are substantially parallel to at least a portion of the servo marks in the first and second servo bands. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of fabricating a thin film servo head apparatus to be positioned in a transverse direction of a magnetic tape moving over the thin film servo head apparatus, the method comprising:
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forming at least two thin film servo heads on a substrate, wherein each of the thin film servo heads comprises a servo gap; and
canting the substrate relative to the transverse direction of the magnetic tape such that the servo gaps are non-parallel to the transverse direction. - View Dependent Claims (19, 20)
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Specification