Patent ID: 8148264
Filing Date: 2012-04-03
Classification: B01J,B81B,B81C,G01N,H01L,Y10T

Abstract:
1. A method for fabricating high aspect ratio pillars comprising: providing a substrate; coating the substrate by a resist; defining the high aspect ratio pillars by patterning and exposing the resist; developing the resist to remove portions of the resist on the substrate, to expose portions of the substrate; depositing an etch mask on the resist and the exposed portions of the substrate; placing the resist in a chemical bath to dissolve the resist and the etch mask on the resist, such that the etch mask on the substrate remain undissolved; etching sections of the substrate exposed as a consequence of dissolving the resist and the etch mask on the resist, the etching being performed with an SF removing a remainder of the etch mask to form the high aspect ratio pillars.