Patent ID: 6579812
Filing Date: 2003-06-17
Classification: H01L

Abstract:
A method for removing a protected layer of the polymer, the method comprising:providing a semiconductor substrate having a gate thereon; conforming an oxide layer is conformed on said gate and said semiconductor substrate; forming a dielectric layer on said oxide layer; performing an anisotropic etching process by way of using said oxide layer as an etched stop layer to etch said dielectric layer until exposing the surface of said oxide layer, so as to form a spacer on a sidewall of said gate, and then a protected layer of the polymer is formed on said spacer and said oxide layer in order to keep the etched profile after said anisotropic etching process is finished; and performing a removing process with a solution of hydrofluoric acid that has a mixed-ratio about 700:1 to 1500:1 and a flow rate about more than 3000 cc/mm to strip said protected layer of the polymer and avoid said oxide layer loss.