Patent ID: 8642378
Filing Date: 2014-02-04
Classification: H01L,Y02E,Y02P

Abstract:
1. A method for forming a photovoltaic device, comprising: patterning a dielectric layer on a substrate to form a patterned dielectric having local spacings between shapes and remote spacings between groups of shapes; depositing a doped epitaxial layer over the patterned dielectric such that selective crystalline growth occurs in portions of the epitaxial layer in contact with the substrate and noncrystalline growth occurs in portions of the epitaxial layer in contact with the patterned dielectric; forming first metal contacts over the local spacings of the patterned dielectric; forming second metal contacts over the remote spacings; and etching exposed portions of the noncrystalline growth using the first and second metal contacts as an etch mask to form alternating interdigitated emitter and back contact stacks.