Patent ID: 7259099

Claim:
A method for forming nanowindows in a substrate comprising the steps of: A. forming convex depressions having bottoms on a surface of a Si substrate; B. treating said bottoms of said convex depressions to form atomically flat regions; C. ion-implanting at least one element selected from the group of elements consisting of oxygen and nitrogen into said Si substrate to form a lower layer comprising Si, a middle layer comprising a Si-based insulating compound, and an upper layer comprising single crystalline Si; D. thinning said upper layer to a thickness of 5.0 to 50.0 nm; E. depositing nanowires comprised of a first metal on said atomically flat regions; and F. etching away portions of said substrate that are unprotected by said nanowires to form a plurality of nanowindows in said substrate, wherein said nanowindows have a pitch of 0.94 to 5.35 nm and window widths of about 0.2 to 5.0 nm.