An improved aperture is provided. The aperture comprises: at least a first layer; the first layer being oxidized in a laterally oriented first region; the first layer being modified within a laterally oriented second region, the second region being oxidized less than the first region; a second...http://www.google.es/patents/US5724374?utm_source=gb-gplus-sharePatente US5724374 - Aperture comprising an oxidized region and a semiconductor material
Aperture comprising an oxidized region and a semiconductor material
