US 9,812,592 B2
Metal-foil-assisted fabrication of thin-silicon solar cell
Seung Bum Rim, Palo Alto, CA (US); and Gabriel Harley, Mountain View, CA (US)
Assigned to SunPower Corporation, San Jose, CA (US)
Filed by Seung Bum Rim, Palo Alto, CA (US); and Gabriel Harley, Mountain View, CA (US)
Filed on Dec. 21, 2012, as Appl. No. 13/725,580.
Prior Publication US 2014/0174519 A1, Jun. 26, 2014
Int. Cl. H01L 31/0216 (2014.01); H01L 31/02 (2006.01); H01L 31/0224 (2006.01); H01L 31/068 (2012.01); H01L 31/18 (2006.01)
CPC H01L 31/0216 (2013.01) [H01L 31/02002 (2013.01); H01L 31/022425 (2013.01); H01L 31/022441 (2013.01); H01L 31/0682 (2013.01); H01L 31/1896 (2013.01); Y02E 10/547 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of fabricating a solar cell, the method comprising:
cleaving a silicon lamina from a silicon substrate, wherein a backside of the silicon lamina includes P-type and N-type doped regions; and
positioning a metal foil between a secondary substrate and the backside of the silicon lamina; and
forming contacts between the metal foil and the doped regions by transmitting a pulsed laser through the secondary substrate.