Patent ID: 8187907
Filing Date: 2012-05-29
Classification: H01L,Y02E,Y02P,Y10S

Abstract:
1. A method of manufacturing a solar cell comprising: providing a first substrate; depositing on the first substrate a sequence of layers of semiconductor material forming a solar cell including a top subcell and a bottom subcell; forming a metal back contact over the bottom subcell; forming a group of discrete, spaced-apart first bonding elements over the surface of the back metal contact; forming a group of discrete, spaced-apart second bonding elements over the surface of a surrogate substrate prior to the surface of the surrogate substrate being attached to the bonding elements of the back metal contact; attaching the surrogate substrate on top of the back metal contact using the bonding elements, wherein the second bonding elements over the surface of the surrogate substrate are linearly aligned in parallel rows and are uniformly distributed over the surrogate substrate, and after being attached to the first bonding elements of the back metal contact, the parallel rows of the second bonding elements are aligned in a direction that is offset by approximately 45 degrees with respect to the linear alignment of the parallel rows of the first bonding elements of the back metal contact; and removing the first substrate to expose the surface of the top subcell.