Patent US5083365A successfully refreshed from Google Patents.
US5083365A
Expired / Lapsed
US
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Process for manufacturing a magnetic head
Assignee: Mitsubishi Electric Corp
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Filing: 1988-06-15
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Granted: 1992-01-28
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Expires: 2008-06-15
Abstract
Abstract A method of making a magnetic head, which includes etching hard matter from the air bearing surface of a slider and polishing the air bearing surface of a magnetic head core together with that of the slider, whereby the floating height of the magnetic head is reduced.
Inventors
- 👤 Toshio Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:48
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/255; G11B5/31; G11B5/3103; G11B5/3106; G11B5/48; G11B5/58; G11B5/60; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49041
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A method of making a magnetic head, which comprises the steps of: integrating a magnetic head core and a slider made of hard matter and soft matter and movable over a recording medium to form a magnetic head for writing and reading information from said recording medium; etching part of said hard matter on an air bearing surface of said slider which is opposite to said recording medium; and polishing said air bearing surface of said slider and an air bearing surface of said magnetic head core so as to provide a small amount of recessing between said air bearing surface of said magnetic head core and said air bearing surface of said slider.
Claim 2
Independent Claim
114 words
A method of making a magnetic head, which comprises the steps of: integrating a magnetic head core and a slider made of hard matter and soft matter and movable over a recording medium to form a magnetic head for writing and reading information from said recording medium; etching part of said hard matter on an air bearing surface of said slider which is opposite to said recording medium; and polishing said air bearing surface of said slider and an air bearing surface of said magnetic head core so as to provide a small amount of recessing between said air bearing surface of said magnetic head core and said air bearing surface of said slider.
Claim 3
Dependent Claim
16 words
The method of claim 1, wherein said etching step is carried out with a CF4 gas.
Claim 4
Dependent Claim
20 words
The method of claim 1, wherein said etching step is carried out with a mixture of CF4 and O2 gases.
Claim 5
Dependent Claim
18 words
The method of claim 1, wherein said hard matter and said soft matter are TiC and Al2O3 respectively.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |