Method for manufacturing thin and flexible ribbon wafer of _semi

Details Method for manufacturing thin and flexible ribbon wafer of _semi Method for manufacturing thin and flexible ribbon wafer of _semi

1981-01-15

1982-12-14

Parrish, John A.

Plastic and nonmetallic article shaping or treating: processes

Utilizing special inert gaseous atmosphere or flushing mold...

264212, 264332, B29D 702

Patent

active

043637698

ABSTRACT:
A method for manufacturing a thin and flexible ribbon wafer of semiconductor material such as germanium, silicon, selenium, tellurium, PbS, InSb, ZnTe, PbSe, InAs, InP, GaSb, PbTe, ZnS, Bi.sub.2 Te.sub.3, and mixtures thereof comprises melting the semiconductor material at a temperature within the range from a melting point thereof to 300.degree. C. above the melting point to form a uniform melt; ejecting under a pressure the melt through a nozzle against a cooling surface of a moving substrate to cool very rapidly a jet flow of the melt at a cooling rate of 1,000.degree. C. to 1,000,000.degree. C./sec to form the ribbon type thin and flexible wafer of fine and compact microscopic structure having a large mechanical strength and an excellent electrical property. It is possible to add to the melt various additives as fluxes or impurities such as B, P, BP, Sb Sn, As, B, P, Sb, In, Al and alloys intermetallic compounds, and conjugates thereof. The thin ribbon wafer as grown is preferably heated at a temperature from within the range 500.degree. C. to the melting point for a time within the range from 0.1 second to one week. The invention also provides a thin and flexible ribbon wafer of semiconductor material manufactured by the above mentioned process.

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