Patent ID: 9299778
Filing Date: 2016-03-29
CPC Classification: B81C,B82Y,G03F,H01L

Claim Text:
1. A method of forming silicon tubes, said method comprising: providing a silicon substrate having a surface; optionally forming an intermediate layer on said surface; forming an etch layer of a composition on said substrate surface, or on said intermediate layer, if present; optionally forming an imaging layer on said etch layer; selectively exposing said etch layer, or said imaging layer, if present, to light to form bands in the etch layer or imaging layer, if present, that are chemically different from the remainder of the etch layer or imaging layer, if present; removing areas of said etch layer or imaging layer, if present, yielding a pattern in the etch layer or imaging layer, if present; and transferring the pattern into the substrate so as to form silicon tubes from said substrate.