Patent ID: 11961931
Assignee: SOLAERO TECHNOLOGIES CORP
Field: Semiconductors (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method of manufacturing a solar cell comprising:
providing a semiconductor growth substrate;
depositing on said growth substrate a sequence of layers of semiconductor material forming a solar cell, including a first solar subcell deposited on said substrate having a first band gap; a second solar subcell deposited over said first subcell having a second band gap smaller than said first band gap; a grading interlayer deposited over said second subcell composed of InGaAlAs and having a third band gap larger than said second band gap; a third solar subcell deposited over the grading interlayer and having a fourth band gap smaller than said second band gap such that said third subcell is lattice mismatched with respect to said second subcell;
depositing a metal contact layer over said sequence of layers;
depositing a coating layer over the metal contact layer;
providing a permanent support substrate;
bonding an adhesive polymer layer to one surface of the permanent support substrate at a curing temperature above 350° C.;
affixing the cured adhesive surface of a permanent supporting substrate directly over said metal contact layer;
permanently bonding the supporting substrate to the metal contact layer by a thermocompressive technique; and
removing the growth substrate.