US3869323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of polishing zinc selenide
Assignee: International Business Machines Corp
•
Filing: 1973-12-28
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Granted: 1975-03-04
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Expires: 1993-12-28
Abstract
Abstract Zinc selenide with damage-free surfaces is obtained by chemically-mechanically polishing using a chemical polishing system including a water soluble alkali or alkaline earth metal hypohalite.
Inventors
- 👤 Jagtar Singh Basi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:04
CPC Classifications
H; H10; H10P; H10P50/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
85 words
A METHOD FOR POLISHING A ZINC SELENIDE SURFACE TO A HIGH DEGREE OF SURFACE PERFECTION COMPRISING: MAINTAINING SAID ZINC SELENIDE SURFACE CONTINUOUSLY WETTED WITH AN EXCESS QUANTITY OF AN AQUEOUS CHEMICAL POLISHING SOLUTION COMPRISING AN ALKALI METAL OR ALKALINE EARTH METAL HYPOHALITE; AND CONTINUOUSLY WIPING THE ZINC SELENIDE SURFACE WITH A FIRM SURFACE USING A SUBSTANTIAL PRESSURE WHILE MAINTAINING A RELATIVE MOVEMENT BETWEEN THE ZINC SELENIDE SURFACE AND THE FIRM SURFACE TO REMOVE THE ZINC SELENIDE FROM THE HIGH POINTS OF THE ZINC SELENIDE SURFACE.
Claim 2
Independent Claim
85 words
A METHOD FOR POLISHING A ZINC SELENIDE SURFACE TO A HIGH DEGREE OF SURFACE PERFECTION COMPRISING: MAINTAINING SAID ZINC SELENIDE SURFACE CONTINUOUSLY WETTED WITH AN EXCESS QUANTITY OF AN AQUEOUS CHEMICAL POLISHING SOLUTION COMPRISING AN ALKALI METAL OR ALKALINE EARTH METAL HYPOHALITE; AND CONTINUOUSLY WIPING THE ZINC SELENIDE SURFACE WITH A FIRM SURFACE USING A SUBSTANTIAL PRESSURE WHILE MAINTAINING A RELATIVE MOVEMENT BETWEEN THE ZINC SELENIDE SURFACE AND THE FIRM SURFACE TO REMOVE THE ZINC SELENIDE FROM THE HIGH POINTS OF THE ZINC SELENIDE SURFACE.
Claim 3
Dependent Claim
13 words
The process of claim 1, where the hypohalite is an alkali metal hypohalite.
Claim 4
Dependent Claim
13 words
The process of claim 2, where the alkali metal is sodium or potassium.
Claim 5
Dependent Claim
13 words
The process of claim 3, where the halite moiety comprises bromine or chlorine.
Claim 6
Dependent Claim
11 words
The process of claim 1, where the hypohalite is sodium hypochlorite.
Claim 7
Dependent Claim
23 words
The process of claim 1, where the concentration of hypohalite is about 0.2 to about 0.8 molar in said aqueous chemical polishing solution.
Claim 8
Dependent Claim
23 words
The process of claim 6, where said substantial pressure is from about 100 to about 500 gm/cm2 of zinc selenide undergoing chemical-mechanical polishing.
Claim 9
Dependent Claim
20 words
The process of claim 7, where said pressure is from 200 to 300 gm/cm2 of zinc selenide undergoing chemical-mechanical polishing.
Claim 10
Dependent Claim
20 words
The process of claim 8, where the concentration of hypohalite in said aqueous chemical polishing solution is about 0.4 molar.
Claim 11
Dependent Claim
11 words
The process of claim 9, where said hypohalite is sodium hypochlorite.
Claim 12
Dependent Claim
15 words
The process of claim 10, where said aqueous chemical polishing solution further comprises sodium carbonate.
References Cited (Backward Citations)
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Cited
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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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |