US4296144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion implanted stylus
Assignee: RCA Corp
•
Filing: 1980-04-23
•
Granted: 1981-10-20
•
Expires: 2000-04-23
Abstract
Abstract An improved method for fabricating a diamond video disc playback stylus. The method comprises the steps of preparing a bottom surface which contacts the video disc and producing a conductive layer adjacent to the bottom surface by ion implantation. The improvement lies in annealing the diamond at about 850° to about 1500° C.
Inventors
- 👤 Edward W. Maby
- 👤 Hirohisa Kawamoto
- 👤 Pierre V. Valembois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:19
CPC Classifications
G; G11; G11B; G11B9/00; G11B9/06; G11B9/07; G11B9/075; C; C23; C23C; C23C14/00; C23C14/22; C23C14/48
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
In a method for fabricating a playback stylus which comprises a diamond dielectric support element for use with a capacitive information system including a high density information conductive disc which comprises the steps of forming a bottom surface for contacting the disc and preparing a conductive layer adjacent to the bottom surface by ion implanting a portion of the diamond dielectric support element; the improvement comprising the additional step of annealing the ion implanted diamond at from about 850° to about 1500° C.
Claim 2
Dependent Claim
83 words
In a method for fabricating a playback stylus which comprises a diamond dielectric support element for use with a capacitive information system including a high density information conductive disc which comprises the steps of forming a bottom surface for contacting the disc and preparing a conductive layer adjacent to the bottom surface by ion implanting a portion of the diamond dielectric support element; the improvement comprising the additional step of annealing the ion implanted diamond at from about 850° to about 1500° C.
Claim 3
Dependent Claim
10 words
The method of claim 1 wherein the stylus is keel-tipped.
Claim 4
Dependent Claim
11 words
The method of claim 1 where the implanted ion is boron.
Claim 5
Dependent Claim
20 words
The method of claim 3 wherein the dose is about 5×10 15 to 4×10 16 B atoms per square centimeter.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein the implanted ion is lithium.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein the ion implanting accelerating energy is from about 50 to about 300 keV.
Claim 8
Dependent Claim
12 words
The method of claim 6 wherein the energy is about 200 keV.
Claim 9
Dependent Claim
12 words
The method of claim 1 wherein the annealing is performed in vacuum.
References Cited (Backward Citations)
US3496027A
Cited
US3842194A
Cited
US3930117A
Cited
US4104832A
Cited
US4162510A
Cited
DE2912550A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |