US4328646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing an abrasive coating
Assignee: Systagenix Wound Management IP Co BV
•
Filing: 1978-11-27
•
Granted: 1982-05-11
•
Expires: 1998-11-27
Abstract
Abstract A method for preparing an abrasive coating from silane and an oxygen-containing gaseous compound such as N 2 O, CO 2 , H 2 O and the like is disclosed. The abrasive coating is prepared using the glow discharge method. The coating may be used to lap submicron articles.
Inventors
- 👤 Grzegorz Kaganowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:16
CPC Classifications
B; B24; B24D; B24D18/00; C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C09; C09K; C09K3/00; C09K3/14; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/401; C23C16/402; C23C16/44; C23C16/50; C23C16/505; C23C16/509; C23C16/5096; G; G11; G11B; G11B9/00; G11B9/06; G11B9/07; G11B9/075; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152; C03C2218/153
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
In a method for lapping an article of submicron dimensions comprising the steps of: glow discharging a mixture of silicon- and oxygen-containing precursors of SiO x ; depositing the product onto a substrate; establishing relative motion between said substrate and article to be lapped; and contacting said article with said deposited product; the improvement which comprises using as the precursors SiH 4 and a gaseous compound selected from the group consisting of N 2 O, CO 2 and H 2 O.
Claim 2
Dependent Claim
81 words
In a method for lapping an article of submicron dimensions comprising the steps of: glow discharging a mixture of silicon- and oxygen-containing precursors of SiO x ; depositing the product onto a substrate; establishing relative motion between said substrate and article to be lapped; and contacting said article with said deposited product; the improvement which comprises using as the precursors SiH 4 and a gaseous compound selected from the group consisting of N 2 O, CO 2 and H 2 O.
Claim 3
Dependent Claim
10 words
The method of claim 1 wherein said substrate is vinyl.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said substrate is metal coated vinyl.
Claim 5
Dependent Claim
226 words
In a method of fabricating a keel-tipped stylus by modifying a tapering support element having a tip which is defined by a prow and a substantially flat V-shaped rear surface remote from said prow; said keel-tipped stylus being suitable for playing back prerecorded signals from a disc record groove of a given width and a given pitch; said method comprising the steps of: introducing said tip of said tapering support element in an abrasive groove having a bottom wall, substantially parallel side walls separated by a distance less than said given width and lands extending away from said side walls; while establishing relative motion between said tapering support element and said abrasive groove along a line which is disposed in a plane substantially perpendicular to said V-shaped rear surface; said side walls of said abrasive groove forming side surfaces of a fore-and-aft constricted terminal portion of said tapering support element; said lands of said abrasive groove forming shoulders interconnecting said constricted terminal portion with remainder of said tapering support element; and terminating said relative motion when said constricted terminal portion reaches a given height; the improvement which comprises glow discharging SiH 4 and a gaseous compound selected from the group consisting of N 2 O, CO 2 and H 2 O; and depositing a silicon oxide abrasive layer onto a groove to obtain the abrasive groove.
Claim 6
Dependent Claim
226 words
In a method of fabricating a keel-tipped stylus by modifying a tapering support element having a tip which is defined by a prow and a substantially flat V-shaped rear surface remote from said prow; said keel-tipped stylus being suitable for playing back prerecorded signals from a disc record groove of a given width and a given pitch; said method comprising the steps of: introducing said tip of said tapering support element in an abrasive groove having a bottom wall, substantially parallel side walls separated by a distance less than said given width and lands extending away from said side walls; while establishing relative motion between said tapering support element and said abrasive groove along a line which is disposed in a plane substantially perpendicular to said V-shaped rear surface; said side walls of said abrasive groove forming side surfaces of a fore-and-aft constricted terminal portion of said tapering support element; said lands of said abrasive groove forming shoulders interconnecting said constricted terminal portion with remainder of said tapering support element; and terminating said relative motion when said constricted terminal portion reaches a given height; the improvement which comprises glow discharging SiH 4 and a gaseous compound selected from the group consisting of N 2 O, CO 2 and H 2 O; and depositing a silicon oxide abrasive layer onto a groove to obtain the abrasive groove.
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) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |