US4639803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film magnetic head slider
Assignee: Hitachi Ltd
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Filing: 1985-07-22
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Granted: 1987-01-27
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Expires: 2005-07-22
Abstract
Abstract A thin film magnetic head slider is formed of a sintered material made of a mixture of AlN and TiN. The ratio of volume % AlN to TiN in the mixture is in the range of 50:50 to 99:1. The thin film magnetic head slider has improved lubricant property as shown by its high contact-start-stop (C.S.S.) life.
Inventors
- 👤 Yukio Takeda
- 👤 Shiro Iijima
- 👤 Shinsuke Higuchi
- 👤 Masaki Ohura
- 👤 Sadanori Nagaike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:03
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/10; G11B5/127; G11B5/31; G11B5/3103; G11B5/3106
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
55 words
A thin film magnetic head slider, comprising: a slider body formed of a sintered material comprising a mixture of AlN and TiN; a thin film transducer disposed on the end surface of said slider body; said mixture having a ratio of the volume % of AlN to TiN in the range of 50:50 through 99:1.
Claim 2
Dependent Claim
55 words
A thin film magnetic head slider, comprising: a slider body formed of a sintered material comprising a mixture of AlN and TiN; a thin film transducer disposed on the end surface of said slider body; said mixture having a ratio of the volume % of AlN to TiN in the range of 50:50 through 99:1.
Claim 3
Dependent Claim
32 words
A thin film magnetic head slider as claimed in claim 1, wherein said mixture has a ratio of the volume % of AlN to TiN in the range of 70:30 to 90:10.
Claim 4
Dependent Claim
44 words
A thin film magnetic head slider as claimed in claim 1, said mixture further comprises 1 to 10% by volume per the volume % of AlN of at least one of Y 2 O 3 , Al 2 O 3 , BN and BeO.
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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |