Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal
Patent
1978-07-20
1979-12-18
Rutledge, L. Dewayne
Metal treatment
Process of modifying or maintaining internal physical...
Chemical-heat removing or burning of metal
29572, 136 89SJ, 136 89MS, 357 30, H01L 3106, H01L 2714
Patent
active
041793188
ABSTRACT:
The invention contemplates a method of making a solar-cell construction wherein plural spaced elongate unit cells of an array are formed from a parallel-grooved single wafer of substrate material of a first conductivity type, with adjacent sidewalls of adjacent units at each inter-unit groove formation. In the transverse succession of such groove formations, the sidewalls of every other groove are formed with regions of a second conductivity type, so that at or near the radiation-exposure surface of each unit there is but one junction between first and second conductivity types. In one general form, all grooves go all the way between upper and lower wafer surfaces, thus defining discrete single-cell units; in another general form, every other groove ends close to but short of the upper surface, thus defining discrete twin-cell units. The units are series-connected by making ohmic connection between the second conductivity-type region of one unit and a first conductivity-type region of an adjacent unit. The construction lends itself to a relatively simple and economical manufacture.
REFERENCES:
patent: 3948682 (1976-04-01), Bordina et al.
patent: 3989946 (1976-11-01), Chapman et al.
patent: 4029962 (1977-06-01), Chapman
patent: 4042418 (1977-08-01), Biter
patent: 4096512 (1978-01-01), Polinsky
patent: 4110122 (1978-08-01), Kaplow et al.
Frank Robert I.
Goodrich Joel L.
Kaplow Roy
Massachusetts Institute of Technology
Roy Upendra
Rutledge L. Dewayne
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