US4458346A
Expired / Lapsed
US
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Pickup stylus
Assignee: Panasonic Holdings Corp
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Filing: 1981-11-09
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Granted: 1984-07-03
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Expires: 2001-11-09
Abstract
Abstract A pickup stylus comprises a diamond stylus body having a rough surface and a conductive coating deposited onto said rough surface. The rough surface is made by ion bombardment process. The pickup stylus is useful for information playback in video and/or audio disc system.
Inventors
- 👤 Tsuneo Mitsuyu
- 👤 Hisamitsu Maeda
- 👤 Kiyotaka Wasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:40
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/0027; C04B41/45; C04B41/50; C04B41/51; C04B41/80; C04B41/81; C04B41/85; C04B41/88; G; G11; G11B; G11B9/00; G11B9/06; G11B9/07; G11B9/075; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
70 words
A pickup stylus comprising a diamond substrate of stylus body and a conductive layer formed on a selected face of the diamond substrate, in which said conductive layer is formed directly on said selected face with an interface layer inbetween, said interface layer having a roughened front formed on said selected face of the diamond substrate and also having concave spaces on said roughened front filled with the conductive layer.
Claim 2
Dependent Claim
70 words
A pickup stylus comprising a diamond substrate of stylus body and a conductive layer formed on a selected face of the diamond substrate, in which said conductive layer is formed directly on said selected face with an interface layer inbetween, said interface layer having a roughened front formed on said selected face of the diamond substrate and also having concave spaces on said roughened front filled with the conductive layer.
Claim 3
Dependent Claim
19 words
A pickup stylus in accordance with claim 1, wherein said roughened front comprises minute protrusions on said selected face.
Claim 4
Dependent Claim
17 words
A pickup stylus in accordance with claim 2, wherein said minute protrusions are of a needle shape.
Claim 5
Dependent Claim
24 words
A pickup stylus in accordance with claim 2, wherein the width of said protrusions are in a range from 0.01 μm to 0.5 μm.
Claim 6
Dependent Claim
24 words
A pickup stylus in accordance with claim 3, wherein the width of said protrusions are in a range from 0.01 μm to 0.5 μm.
Claim 7
Dependent Claim
24 words
A pickup stylus in accordance with claim 2, wherein the length of said protrusions are in a range from 0.01 μm to 0.5 μm.
Claim 8
Dependent Claim
24 words
A pickup stylus in accordance with claim 3, wherein the length of said protrusions are in a range from 0.01 μm to 0.5 μm.
Claim 9
Dependent Claim
42 words
A pickup stylus in accordance with claim 1, wherein said conductive layer is of a substance selected from the group consisting of Ti, Ta, Nb, Hf, W, Zr, Cr, Ni, alloys thereof, nitrides thereof, carbides thereof, silicides thereof and a stainless steel.
Claim 10
Dependent Claim
42 words
A pickup stylus in accordance with claim 2, wherein said conductive layer is of a substance selected from the group consisting of Ti, Ta, Nb, Hf, W, Zr, Cr, Ni, alloys thereof, nitrides thereof, carbides thereof, silicides thereof and a stainless steel.
Claim 11
Dependent Claim
42 words
A pickup stylus in accordance with claim 3, wherein said conductive layer is of a substance selected from the group consisting of Ti, Ta, Nb, Hf, W, Zr, Cr, Ni, alloys thereof, nitrides thereof, carbides thereof, silicides thereof and a stainless steel.
Claim 12
Dependent Claim
42 words
A pickup stylus in accordance with claim 4, wherein said conductive layer is of a substance selected from the group consisting of Ti, Ta, Nb, Hf, W, Zr, Cr, Ni, alloys thereof, nitrides thereof, carbides thereof, silicides thereof and a stainless steel.
Claim 13
Dependent Claim
42 words
A pickup stylus in accordance with claim 5, wherein said conductive layer is of a substance selected from the group consisting of Ti, Ta, Nb, Hf, W, Zr, Cr, Ni, alloys thereof, nitrides thereof, carbides thereof, silicides thereof and a stainless steel.
Claim 14
Dependent Claim
42 words
A pickup stylus in accordance with claim 6, wherein said conductive layer is of a substance selected from the group consisting of Ti, Ta, Nb, Hf, W, Zr, Cr, Ni, alloys thereof, nitrides thereof, carbides thereof, silicides thereof and a stainless steel.
Claim 15
Dependent Claim
42 words
A pickup stylus in accordance with claim 7, wherein said conductive layer is of a substance selected from the group consisting of Ti, Ta, Nb, Hf, W, Zr, Cr, Ni, alloys thereof, nitrides thereof, carbides thereof, silicides thereof and a stainless steel.
Claim 16
Dependent Claim
18 words
A pickup stylus in accordance with claim 1, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 17
Dependent Claim
18 words
A pickup stylus in accordance with claim 2, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 18
Dependent Claim
18 words
A pickup stylus in accordance with claim 3, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 19
Dependent Claim
18 words
A pickup stylus in accordance with claim 4, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 20
Dependent Claim
18 words
A pickup stylus in accordance with claim 5, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 21
Dependent Claim
18 words
A pickup stylus in accordance with claim 6, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 22
Dependent Claim
18 words
A pickup stylus in accordance with claim 7, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 23
Dependent Claim
18 words
A pickup stylus in accordance with claim 8, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 24
Dependent Claim
18 words
A pickup stylus in accordance with claim 9, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 25
Dependent Claim
18 words
A pickup stylus in accordance with claim 10, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 26
Dependent Claim
18 words
A pickup stylus in accordance with claim 11, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 27
Dependent Claim
18 words
A pickup stylus in accordance with claim 12, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 28
Dependent Claim
18 words
A pickup stylus in accordance with claim 13, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 29
Dependent Claim
18 words
A pickup stylus in accordance with claim 14, wherein said conductive layer is further covered by corrosion-resistive film.
Claim 30
Dependent Claim
38 words
A pickup stylus in accordance with any one of claims 15 to 28, wherein said corrosion-resistive film is of a substance selected from the group consisting of Pt, Ir, Au, Rh, corrosion-resistive compounds, and a corrosion-resistive organic compound.
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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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |