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US 4,447,393 AGranted
Oxide-free CdTe synthesis
AssigneeTexas Instruments Incorporated
InventorDonald F. Weirauch
Life of this patent
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Abstract
The problem of CdTe sticking to quartz boats is avoided by preventing any presence of cadmium oxides in the as-compounded CdTe. This is accomplished by distilling the cadmium under a high vacuum immediately prior to the CdTe compounding step.
Claims8
A method for compounding CdTe, comprising the steps of:
- providing high-purity cadmium and Te;
- distilling said high-purity Cd under a vacuum;
- and
- compounding said Cd and Te to form a melt of CdTe;
- wherein said Cd is maintained under vacuum continuously from said distillation step through said compounding step.
2 more elements
A method for compounding CdTe, comprising the steps of:
- providing high-purity cadmium and Te;
- distilling said high-purity Cd under a vacuum;
- and
- compounding said Cd and Te to form a melt of CdTe;
- wherein said Cd is maintained under partial pressure of oxygen which is less than 10.sup.-3 Torr continuously from said distillation step through said compounding step.
2 more elements
Dependencies are inferred from the claim text.