US4355052A
Expired / Lapsed
US
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Method of preparing an abrasive coated substrate
Assignee: RCA Corp
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Filing: 1981-04-20
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Granted: 1982-10-19
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Expires: 2001-04-20
Abstract
Abstract An improved method for preparing an abrasive SiOx coating wherein 1</=x</=2. The method includes the steps of submitting SiH4 and N2O to glow discharge and depositing the SiOx product of the glow discharge onto a substrate. The improvement includes the additional step of adjusting the refractive index and thickness of the SiOx coating by means of the glow discharge deposition process parameters so as to maximize the abrasiveness of the SiOx coating.
Inventors
- 👤 Grzegorz Kaganowicz
- 👤 John W. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:46
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44; G11B3/56; C; C09; C09K; C09K3/00; C09K3/14; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/401; C23C16/402
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
In a method for preparing an abrasive SiO x coating, wherein 1≦x≦2, comprising the steps of submitting SiH 4 and N 2 O to a glow discharge and depositing the SiO x product of the glow discharge onto a substrate; the improvement comprising the additional step of adjusting the refractive index and thickness of the SiO x coating by means of the glow discharge deposition process parameters so as to maximize the abrasiveness of the SiO x coating.
Claim 2
Dependent Claim
78 words
In a method for preparing an abrasive SiO x coating, wherein 1≦x≦2, comprising the steps of submitting SiH 4 and N 2 O to a glow discharge and depositing the SiO x product of the glow discharge onto a substrate; the improvement comprising the additional step of adjusting the refractive index and thickness of the SiO x coating by means of the glow discharge deposition process parameters so as to maximize the abrasiveness of the SiO x coating.
Claim 3
Dependent Claim
16 words
A method in accordance with claim 1 wherein the thickness is at least about 600 angstroms.
Claim 4
Dependent Claim
17 words
A method in accordance with claim 1 wherein the refractive index is between about 1.1 and 1.45.
Claim 5
Dependent Claim
17 words
A method in accordance with claim 3 wherein the refractive index is between about 1.33 and 1.43.
Claim 6
Dependent Claim
18 words
A method in accordance with claim 1 wherein the substrate is a homopolymer or copolymer of vinyl chloride.
Claim 7
Dependent Claim
17 words
A method in accordance with claim 5 wherein the substrate surface is coated with a metal layer.
Claim 8
Dependent Claim
55 words
A method in accordance with claim 1 wherein the process parameters are selected from the group consisting of the N 2 O flow rate, the SiH 4 flow rate, the partial pressure of N 2 O, the partial pressure of SiH 4 , and the partial pressure ratio of SiH 4 to N 2 O.
Claim 9
Dependent Claim
96 words
In a method for lapping an article comprising the steps of submitting SiH 4 and N 2 O to a glow discharge; depositing the product to obtain an abrasive SiO x coating, wherein 1≦x≦2, onto a substrate; establishing relative motion between the article and the substrate; and contacting the article with the abrasive SiO x coating; the improvement wherein the method comprises the additional step of adjusting the refractive index and thickness of the SiO x coating by means of the glow discharge deposition parameters so as to maximize the abrasiveness of the SiO x coating.
Claim 10
Dependent Claim
96 words
In a method for lapping an article comprising the steps of submitting SiH 4 and N 2 O to a glow discharge; depositing the product to obtain an abrasive SiO x coating, wherein 1≦x≦2, onto a substrate; establishing relative motion between the article and the substrate; and contacting the article with the abrasive SiO x coating; the improvement wherein the method comprises the additional step of adjusting the refractive index and thickness of the SiO x coating by means of the glow discharge deposition parameters so as to maximize the abrasiveness of the SiO x coating.
Claim 11
Dependent Claim
16 words
A method in accordance with claim 8 wherein the thickness is at least about 600 angstroms.
Claim 12
Dependent Claim
17 words
A method in accordance with claim 8 wherein the refractive index is between about 1.1 and 1.45.
Claim 13
Dependent Claim
17 words
A method in accordance with claim 10 wherein the refractive index is between about 1.33 and 1.43.
Claim 14
Dependent Claim
12 words
A method in accordance with claim 8 wherein the article comprises diamond.
Claim 15
Dependent Claim
18 words
A method in accordance with claim 8 wherein the article is a capacitive information disc record playback stylus.
Claim 16
Dependent Claim
54 words
A method in accordance with claim 8 wherein the process parameters are selected from the group consisting of the N 2 O flow rate, the SiH 4 flow rate, the partial pressure of N 2 O, the partial pressure of SiH 4 and the partial pressure ratio of SiH 4 to N 2 O.
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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |