Fishing – trapping – and vermin destroying
Patent
1986-06-16
1987-11-03
Weisstuch, Aaron
Fishing, trapping, and vermin destroying
136256, 136255, 357 30, 357 68, 437235, 437160, H01L 3118
Patent
active
047035536
ABSTRACT:
A method for providing deep impurity doped regions under the back contacts of a solar cell. In a semiconductor wafer with a p-n junction therein defining an n+ layer emitter and p-type layer bulk, a p+ layer is formed in the p-type layer under the back surface of the wafer. An oxide passivation layer is disposed over the back surface. Metal paste is screen printed onto the oxide layer in a predetermined pattern. The combination is heated to a temperature such that the metal paste will drive through the oxide layer and alloy with selected regions of p+ layer and p-type layer to a predetermined depth forming heavily doped p+ impurity regions. Metallization is applied onto the oxide layer making electrical contact with the heavily doped p+ impurity regions.
REFERENCES:
patent: 3903427 (1975-09-01), Pack
patent: 3990097 (1976-11-01), Lindmayer
patent: 4106047 (1978-08-01), Lindmayer
patent: 4163678 (1979-08-01), Bube
patent: 4165241 (1979-08-01), Yerkes et al.
patent: 4234352 (1980-11-01), Swanson
patent: 4278831 (1981-07-01), Riemer et al.
patent: 4395583 (1983-07-01), Meulenberg, Jr.
patent: 4602120 (1986-07-01), Wakefield et al.
Coble Paul M.
Gudmestad Terje
Karambelas A. W.
Spectrolab, Inc.
Weisstuch Aaron
LandOfFree
Drive through doping process for manufacturing low back surface does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive through doping process for manufacturing low back surface , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive through doping process for manufacturing low back surface will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1668375