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US3622399A
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Method for preparing single crystal pseudobinary alloys
Assignee: Texas Instruments Inc
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Filing: 1968-12-31
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Granted: 1971-11-23
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Expires: 1988-12-31
Abstract
Abstract A method for producing homogeneous single crystal ingots of pseudobinary alloys having high-crystal perfection by rapidly quenching a homogeneous liquid mixture of the desired constituents to produce a homogeneous polycrystalline ingot, then very slowly passing the polycrystalline ingot through a thermal gradient unitl the ingot is at a maximum temperature just below the solidus termperature of the alloy, thus causing the grain boundaries to migrate through the ingot as a result of directional solid-state recrystallization, then slowly coolng the ingot.
Inventors
- 👤 Rowland E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:35
CPC Classifications
C; C30; C30B; C30B1/00; C30B1/02; C30B1/06; C30B29/00; C30B29/10; C30B29/46; C30B29/48
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
30 words
The method defined in claim 1 wherein the alloy comprises at least two compounds, each compound being formed by an element from Group II and an element from Group VI.
Claim 2
Dependent Claim
17 words
The method defined in claim 2 wherein the alloy is comprised of mercury telluride and cadmium telluride.
Claim 3
Dependent Claim
30 words
The method defined in claim 1 wherein the alloy comprises at least two compounds, each compound being formed by an element from Group III and an element from Group V.
Claim 4
Dependent Claim
17 words
The method defined in claim 4 wherein the alloy is comprised of indium arsenide and indium antimonide.
Claim 5
Dependent Claim
30 words
The method defined in claim 1 wherein the alloy comprises at least two compounds, each compound being formed by an element from Group IV and an element from Group VI.
Claim 6
Dependent Claim
17 words
The method defined in claim 6 wherein the alloy is comprised of lead telluride and tin telluride.
Claim 7
Independent Claim
48 words
The method for producing a large, homogeneous, single crystal of a pseudobinary alloy from a highly polycrystalline ingot which comprises slowly moving the ingot relative to a thermal gradient until all of the ingot is heated to approximately the same temperature approaching the solidus temperature of the alloy.
Claim 8
Independent Claim
81 words
The method for producing a large, homogeneous, single crystal of a pseudobinary alloy which comprises: rapidly freezing a liquid mixture comprising about 1.0-(x) mole parts mercury, about (x) mole parts cadmium and greater than 1.0 mole parts tellurium to produce a polycrystalline ingot comprised of crystals of substantially the same average composition, then slowly moving the ingot relative to a thermal gradient until all of the ingot is heated to approximately the same temperature approaching the solidus temperature of the alloy.
Claim 9
Dependent Claim
16 words
The method of claim 9 wherein there is from about 1.00 to about 1.02 parts tellurium.
Claim 10
Dependent Claim
28 words
The method of claim 9 wherein there is about 0.79 mole parts mercury, about 0.21 mole parts cadmium, and between about 1.00 and about 1.02 mole parts tellurium.
References Cited (Backward Citations)
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |