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US5163218A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of making integrated magnetic read/write head/flexure/conductor structure

Assignee: Seagate Technology LLC
•
Filing: 1991-06-11
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Granted: 1992-11-17
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Expires: 2011-06-11
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Abstract

Abstract An integrated head/flexure/conductor structure for the reading and writing of information with respect to a relatively moving medium, such as a disk or drum, and a method for manufacturing the same. The proposed structure takes the form of a micro-dimension, elongate dielectric flexure body, and embedded within such body both magnetic read/write pole structure, and electrical coil and conductor structure operatively associated with the pole structure. The flexure body and the embedded constituents are formed on an atom-by-atom basis utilizing one or more conventional material-deposition processes. The method [proposed by the invention] includes orthogonal-plane processing steps that facilitate formation of the magnetic pole structure in a way enhancing dimensional control. In addition, the method [of the invention] involves steps utilizing etchable wall-like stripes, and a commonly etchable base layer, which together define three sides of the structure of the invention during formation thereof, etching of which stripes and layer greatly facilitates separation and release of finally completed units as free individuals.

Inventors

  • 👤 Harold J. Hamilton

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 04:26
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/3103; G11B5/48; G11B5/4806; G11B5/484; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49041; Y10T29/49043; Y10T29/4906; Y10T29/49064

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 160 words
A multistage method of making an integrated, unitary read/write head/flexure/conductor structure of the reading and writing of information with respect to a relatively moving recording medium, said method comprising producing in plural stages at least one pair of spaced, elongate, etch-removable, wall-like stripes for use as a dimension-defining structure in the process of said method, forming in the space between such stripes, in plural stages which are interspersed with said producing stages, and by a deposition process, an elongate dielectric flexure body whose width dimension is thereby defined by such stripes, and, during said producing and forming creating within such body, in plural stages which are interspersed with said producing and forming stages, and also by a deposition process, magnetic read/write pole structure having components formed generally via deposition steps, which steps include the performance of material deposition that occurs directionally in two, orthogonally related directions, and also creating electrical coil and conductor means operatively associated with such pole structure.
Claim 2
Dependent Claim 160 words
A multistage method of making an integrated, unitary read/write head/flexure/conductor structure of the reading and writing of information with respect to a relatively moving recording medium, said method comprising producing in plural stages at least one pair of spaced, elongate, etch-removable, wall-like stripes for use as a dimension-defining structure in the process of said method, forming in the space between such stripes, in plural stages which are interspersed with said producing stages, and by a deposition process, an elongate dielectric flexure body whose width dimension is thereby defined by such stripes, and, during said producing and forming creating within such body, in plural stages which are interspersed with said producing and forming stages, and also by a deposition process, magnetic read/write pole structure having components formed generally via deposition steps, which steps include the performance of material deposition that occurs directionally in two, orthogonally related directions, and also creating electrical coil and conductor means operatively associated with such pole structure.
Claim 3
Dependent Claim 15 words
The method of claim 1, wherein said flexure body is formed of sputtered aluminum oxide.
Claim 4
Dependent Claim 55 words
The method of claim 1 or 2 which produces a final unit having an overall length in the range of about 0.2- to about 0.5-inches, an overall width in the range of about 4- to about 20-mils, a thickness in the range of about 15- to about 65-microns, and a mass less than about 1.5-milligrams.
Claim 5
Independent Claim 24 words
The method of claims 1 or 2 which produces a final unit wherein the read/write pole structure takes the form of a probe-type structure.
Claim 6
Independent Claim 24 words
The method of claims 1 or 2 which produces a final unit wherein the read/write pole structure takes the form of a ring-type structure.

References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-11-17 1996-05-18 1996-11-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-11-17 2000-05-18 2000-11-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-11-17 2004-05-18 2004-11-17 $7700.00 Window Closed / Lapsed

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