US5936813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Giant magnetoresistive head with electron cured insulator
Assignee: PHC Corp
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Filing: 1998-08-03
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Granted: 1999-08-10
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Expires: 2018-08-03
Abstract
Abstract A process for making a magnetic head including the steps of forming a first pole piece comprising magnetic material and depositing a gap-forming layer comprising nonmagnetic material over the first pole piece. A first patterned layer of uncrosslinked polymer is formed on the gap-forming layer. The first patterned layer is cured by electron irradiation at a temperature less than about 175 C. to crosslink the polymer. A conductive coil is formed on the cured first patterned layer and a second patterned layer of uncrosslinked polymer is formed over the conductive coil. The second patterned layer is cured by electron irradiation at a temperature less than about 175 C. to crosslink the polymer. A second pole piece layer of magnetic material is formed to complete the magnetic head.
Inventors
- 👤 Young Keun Kim
- 👤 Michael J. Jennison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:54
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0035; B; B82; B82Y; B82Y10/00; B82Y25/00; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/3109; G11B5/313; G11B5/3163; G11B5/33; G11B5/39; G11B5/3903; G11B5/3967; G11B2005/3996; G11B5/3113
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A head structure for writing data on a magnetic media comprising: a first pole having an upper surface; a first electron cured insulator layer covering a portion of the upper surface; a plurality of conductive coils formed on the first electron cured insulator layer; a second electron cured insulator layer filling between and covering the plurality of coils; and a second pole covering the second electron cured insulator layer so as to define a write gap between the first pole and the second pole.
Claim 2
Dependent Claim
84 words
A head structure for writing data on a magnetic media comprising: a first pole having an upper surface; a first electron cured insulator layer covering a portion of the upper surface; a plurality of conductive coils formed on the first electron cured insulator layer; a second electron cured insulator layer filling between and covering the plurality of coils; and a second pole covering the second electron cured insulator layer so as to define a write gap between the first pole and the second pole.
Claim 3
Dependent Claim
24 words
The head structure of claim 1 further comprising a giant magnetoresistive read head having a structure and stoichiometry consistent with processing below 150 C.
Claim 4
Dependent Claim
16 words
The head structure of claim 1 wherein the first and second electron cured insulators comprise photoresist.
Claim 5
Dependent Claim
88 words
A head structure for writing data on a magnetic media comprising: a first pole having an upper surface; a first insulator layer comprising an electron curable polymer covering a portion of the upper surface; a plurality of conductive coils formed on the first electron cured insulator layer; a second insulator layer comprising the electron curable polymer filling between and covering the plurality of coils; and a second pole covering the second insulator layer so as to define a write gap between the first pole and the second pole.
Claim 6
Dependent Claim
88 words
A head structure for writing data on a magnetic media comprising: a first pole having an upper surface; a first insulator layer comprising an electron curable polymer covering a portion of the upper surface; a plurality of conductive coils formed on the first electron cured insulator layer; a second insulator layer comprising the electron curable polymer filling between and covering the plurality of coils; and a second pole covering the second insulator layer so as to define a write gap between the first pole and the second pole.
Claim 7
Dependent Claim
24 words
The head structure of claim 4 further comprising a giant magnetoresistive read had having a structure and stoichiometry consistent with processing below 150 C.
Claim 8
Dependent Claim
26 words
A head structure for accessing data on a magnetic media comprising: a plurality of conductive coils; an insulator layer comprising electron-cured photoresist surrounding the conductive coils.
Claim 9
Dependent Claim
26 words
A head structure for accessing data on a magnetic media comprising: a plurality of conductive coils; an insulator layer comprising electron-cured photoresist surrounding the conductive coils.
Claim 10
Dependent Claim
30 words
The head structure of claim 6 further comprising a giant magnetoresistive read had formed integrally with the insulator layer having a structure and stoichiometry consistent with processing below 150 C.
References Cited (Backward Citations)
US4652954A
Cited
US5122440A
Cited
US5003178A
Cited
US5180653A
Cited
US5270895A
Cited
US5557492A
Cited
US5580602A
Cited
US5793579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-09 | 2003-02-08 | 2003-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-09 | 2007-02-08 | 2007-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-09 | 2011-02-08 | 2011-08-10 | $7700.00 | Window Closed / Lapsed |