Patent ID: 7804022
Filing Date: 2010-09-28
Classification: H01L,Y02E

Abstract:
1. A solar cell comprising: a plurality of positive metal contact fingers, each of the positive metal contact fingers being coupled to one or more P-type diffusion regions on a backside of the solar cell, a front side of the solar cell facing the sun during normal operation to collect solar radiation; a plurality of negative metal contact fingers, each of the negative metal contact fingers being coupled to one or more N-type diffusion regions on the backside of the solar cell, the negative metal contact fingers being interdigitated with the positive metal contact fingers; a first solder pad providing a contact surface on which an external lead may be soldered onto to electrically connect to the negative metal contact fingers, the negative metal contact fingers comprising at least three metal contact fingers and arranged such that their ends point toward and collectively surround at least three sides of the first solder pad and at least 50% but not an entirety of a perimeter of the first solder pad.