Patent ID: 9680035
Date: 2017-06-13
CPC Classifications: H01L,Y02E,Y02P

Claim:
1. A surface mount multijunction photovoltaic cell, comprising: a substrate having a front substrate surface and a back substrate surface; a heteroepitaxial layer overlying the front substrate surface; an antireflection coating overlying at least a first portion of the heteroepitaxial layer; a patterned cap region overlying a second portion of the heteroepitaxial layer and electrically connected to the heteroepitaxial layer; a front side metal pad overlying and electrically connected to the patterned cap region, wherein the front side metal pad comprises a bottom surface; a back surface solder pad underlying a portion of and electrically connected to the back substrate surface; a front surface solder pad underlying and insulated from the back substrate surface; a through-wafer-via formed through the substrate and heteroepitaxial layer interconnecting the front surface solder pad and the front side metal pad; a passivation layer underlying a portion of the back substrate surface and disposed on sidewalls of the through-wafer-via; wherein at least a portion of the antireflection coating overlying the at least first portion of the heteroepitaxial layer is disposed between the passivation layer on the sidewalls of the through-wafer-via and the patterned cap region and between the front side metal pad and the heteroepitaxial layer an optical adhesive overlying the front side metal pad, the patterned cap region, and the antireflection coating; and a coverglass overlying the optical adhesive.