US4119704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making gallium arsenide or phosphide
Assignee: Siltronic AG
•
Filing: 1977-08-28
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Granted: 1978-10-10
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Expires: 1997-08-28
Abstract
Abstract A process for producing gallium arsenide or phosphide at temperatures belowhe sublimation point of arsenic and red phosphorus, respectively, which consists of grinding and tempering a mixture of the constituent elements of the compound to be obtained in substantially stoichiometric amounts.
Inventors
- 👤 Herbert Jacob
- 👤 Michael Blatte
- 👤 Fritz Kremser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:10
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/08; C01B25/082; C01B25/087; C22; C22C; C22C28/00; Y; Y10; Y10S; Y10S420/00; Y10S420/903
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A process for producing gallium arsenide or phosphide comprising the steps of: (a) forming an intimate mixture of liquid metallic gallium and either arsenic or red phosphorus, in substantially stoichiometric proportions; (b) grinding said mixture at a temperature between 30° C and about 60° C to attain a pasty consistency for a period of time to induce formation of gallium arsenide or phosphide; (c) tempering the ground mixture by heating at a temperature between about 200° C and about 400° C below the sublimation point of the arsenic or the red phosphorus; and (d) recovering the gallium arsenide or phosphide.
Claim 2
Dependent Claim
100 words
A process for producing gallium arsenide or phosphide comprising the steps of: (a) forming an intimate mixture of liquid metallic gallium and either arsenic or red phosphorus, in substantially stoichiometric proportions; (b) grinding said mixture at a temperature between 30° C and about 60° C to attain a pasty consistency for a period of time to induce formation of gallium arsenide or phosphide; (c) tempering the ground mixture by heating at a temperature between about 200° C and about 400° C below the sublimation point of the arsenic or the red phosphorus; and (d) recovering the gallium arsenide or phosphide.
Claim 3
Dependent Claim
18 words
The process according to claim 1 wherein the grinding and tempering is effected in repeated, subsequent, separate steps.
Claim 4
Dependent Claim
28 words
The process according to claim 2 wherein the subsequent tempering steps occur about 5° C to 50° C below the sublimation points of arsenic and red phosphorus, respectively.
Claim 5
Dependent Claim
17 words
The process according to claim 1 wherein 3 to 8 grinding and tempering steps follow each other.
Claim 6
Dependent Claim
18 words
The process according to claim 4 wherein each tempering step is carried out for 15 - 45 minutes.
Claim 7
Dependent Claim
29 words
The process according to claim 2 wherein in the second and each subsequent grinding step, the product is ground to an average particle size of less than 2 μ.
Claim 8
Dependent Claim
19 words
The process of claim 1 in which the grinding step is performed under a blanket of an inert gas.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |