US Patent No: 7,100,266
Number of patents in Portfolio can not be more than 2000
Method of forming a beveled writing pole of a perpendicular writing element
Stats
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Sep 5, 2006
Issued date -
Jan 4, 2002
filing date -
10/039,201
serial no -
In Force
status
Importance
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Abstract
A beveled writing pole includes a top portion, a beveled portion, and a throat portion. The top portion has an end that defines a writing pole tip. The beveled portion adjoins the top portion and has a bevel that extends from the writing pole tip and increases a thickness of the writing pole proximate the pole tip. The throat portion is formed of the top and beveled portions and has tapered sides that extend from the writing pole tip and increase a width of the writing pole proximate the writing pole tip. A method of forming the beveled writing pole is also presented.
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First Claim
Related Publications
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,680,283 Magnetic head and magnetic disk drive | 15 | 1995 | |
| 5,854,727 Magnetic head and magnetic disk drive | 14 | 1997 | |
| 5,995,341 Magnetic disk drive recording a signal with a skew angle | 36 | 1998 | |
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| 4,839,761 Magnetic head for perpendicular magnetic recording system | 16 | 1987 | |
| 4,982,301 Magnetic head for perpendicular magnetic recording system and process | 14 | 1990 | |
| 6,504,675 Perpendicular magnetic recording heads with write pole shaped to reduce skew effects during writing | 127 | 2001 | |
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| 4,550,353 Thin-film magnetic head and method for fabricating the same | 43 | 1983 | |
| 6,710,973 Single pole type recording head including tapered edges | 52 | 2001 | |
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| 4,190,872 Thin film inductive transducer | 71 | 1978 | |
| 4,390,916 Single track magnetic head assembly | 6 | 1980 | |
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| 4,811,142 Magnetic head for vertical magnetic recording and method of producing same | 6 | 1987 | |
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| 4,771,350 Magnetic reading/writing transducer for perpendicular recording | 24 | 1985 | |
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| 5,196,976 Magnetoresistance magnetic head for perpendicular recording on a magnetic support | 50 | 1990 | |
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| 4,974,110 Thin film magnetic head for perpendicular recording and reproducing | 37 | 1989 | |
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| 5,073,836 Single pole write and a differential magneto-resistive read for perpendicular recording | 51 | 1989 | |
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| 6,510,022 Method for shaping pole pieces of magnetic heads by chemical mechanical polishing | 9 | 2000 | |
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| 4,912,584 Method for fabricating magnetic recording poles | 47 | 1988 | |
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| 5,075,956 Method of making recording heads with side shields | 80 | 1990 | |
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| 4,764,833 Perpendicular magnetic head | 5 | 1985 | |
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| 5,225,953 Magnetic thin film head of a single magnetic pole for perpendicular recording and reproduction | 34 | 1992 | |
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| 5,726,841 Thin film magnetic head with trimmed pole tips etched by focused ion beam for undershoot reduction | 63 | 1996 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 5, 2014 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 5, 2018 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |