Patent ID: 6277667
Filing Date: 2001-08-21
Classification: H01L,Y02E

Abstract:
A method for fabricating solar cells, comprising the steps of:(a) providing a P-substrate with a first surface and a second surface;(b) applying a treatment to the first surface of the P-substrate to form a rough surface;(c) selectively coating an N.sup.+ diffusion source onto the first surface of the P-substrate;(d) providing an N.sup.- diffusion source and diffusing together with the N.sup.+ diffusion source into the first surface of the P-substrate to form an N.sup.- type diffusion region consisting of an N.sup.- diffusion region with a shallow junction and an N.sup.+ diffusion region with a deep junction;(e) removing the N.sup.+ diffusion source overlying the first surface of the P-substrate;(f) forming an anti-reflection layer on the first surface;(g) forming a first electrode on the anti-reflection layer and a second electrode on the second surface of the P-substrate, wherein the first electrode is aligned to the N.sup.+ diffusion region; and(h) sintering to make the first electrode pass through the anti-reflection layer and contact the N.sup.+ diffusion region.