Patent ID: 8008575
Filing Date: 2011-08-30
Classification: H01L,Y02E

Abstract:
1. A solar cell comprising: a continuous emitter diffusion region for collecting minority charge carriers in a solar cell, the continuous emitter diffusion region being formed on a back side of the solar cell; a plurality of dotted base diffusion regions for collecting majority charge carriers in the solar cell, the plurality of dotted base diffusion regions being surrounded by the continuous emitter diffusion region on the back side of the solar cell; a first metal grid electrically coupled to at least two dotted base diffusion regions in the plurality of dotted base diffusion regions; a first insulator layer between the first metal grid and the at least two dotted base diffusion regions, the first metal grid being electrically coupled to the at least two dotted base diffusion regions through at least two contact holes that go through the first insulator layer; and a second metal grid electrically coupled to the continuous emitter diffusion region, wherein the first and second metal grids are formed on the back side of the solar cell.