Patent ID: 6387726
Filing Date: 2002-05-14
Classification: H01L,Y02E

Abstract:
A method of fabricating a silicon solar cell having p-doped regions and n-doped regions on a same side, comprising the steps of:(a) forming a passivating layer on a surface of the cell having opened windows at the p-doped regions and the n-doped regions; (b) depositing and patterning a first metal layer on the passivating layer in such was that the first metal layer comes into contact with the p-doped regions and the n-doped regions; (c) depositing an insulator layer of polyimide on the first metal layer; (d) etching and patterning the insulator layer of polyimide in such a way that the insulator layer has opened windows at, at least one of the p-doped regions and the n-doped regions; (e) curing the insulator layer of polyimide by heating at a predetermined first temperature for a predetermined first time; (f) additionally curing the insulator layer of polyimide by heating at a predetermined second temperature, which is higher than the predetermined first temperature, for a predetermined second time; and (g) depositing a second metal layer on the insulator layer of polyimide in such a way that the second metal layer comes into contact with one of the p-doped regions and the n-doped regions; and wherein the predetermined second temperature in step (f) is a temperature ranging from 400Â° C. to 500 Â°C.