Patent ID: 8669188

Claim:
A method for producing a pattern made from a first material comprising the following steps: providing a substrate provided with a layer of first material covered by a first etching mask, a covering layer and a second etching mask, the covering layer having a main area covered by the second etching mask and an uncovered secondary area, partially etching the secondary area of the covering layer by means of the second etching mask so as to form a salient pattern in the covering layer, forming and etching a masking material so as to form lateral spacers around the salient pattern defining a third etching mask, eliminating the second etching mask, etching the covering layer by means of the third etching mask so as to form a salient pattern in the covering layer and to uncover the first etching mask and the first material, and etching the layer of first material by means of the covering layer and of the first etching mask to form the pattern made from the first material, wherein the first etching mask has a pattern, the pattern being retained throughout the steps.