Patent ID: 9646819
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A method for forming a surface oxide layer on an amorphous silicon, comprising: using a hydrofluoric acid to clean a surface of the amorphous silicon so as to remove an oxide layer on the surface of the amorphous silicon; using a water to clean the surface of the amorphous silicon being cleaned by the hydrofluoric acid; drying the surface of the amorphous silicon after being cleaned by the water; using an extreme ultraviolet lithography to decompose oxygen by extreme ultraviolet to perform an oxidation to the surface of the amorphous silicon without the oxide layer so as to form a first oxide layer on the surface of the amorphous silicon after being dried such that the surface of the amorphous silicon having the first oxide layer is given with hydrophilicity; using an oxidizing solution to perform another oxidation to the surface of the amorphous silicon having the first oxide layer and thereby form a second oxide layer, wherein the second oxide layer has a thickness greater than that of the first oxide layer; drying the surface of the amorphous silicon having the second oxide layer.