Patent ID: 7285378
Filing Date: 2007-10-23
Classification: H01L

Abstract:
1. Method to manufacture juxtaposed islands by means of self-organised deposition on a substrate, comprising the following steps: shaping of a surface of a substrate according to a periodic network of terraces composed of the intersection of two step networks, each terrace having a first dimension corresponding to the step width of one of the step networks and a second dimension corresponding to the step width of the other step network, depositions of material onto said shaped surface, the depositions of material being carried out by means of step edge progression, each progression covering each terrace partially, to successively form a superimposition of monolayers, the composition of the monolayers being chosen between at least one first composition and one second composition, characterized in that: the shaping step of a surface of a substrate results in square terraces of identical size and the same height, the material deposition step onto said shaped surface consists of carrying out, for each terrace, at least one alternation of a first deposition of a first material onto a progression covering a portion of terrace corresponding to a fraction x of one dimension or side of the terrace, and of a second deposition of a second material on a progression covering the free remaining portion of the terrace corresponding to the fraction 1−x of the side of the terrace, with the result that each terrace supports one square island formed solely of monolayers of the first material and of a side equal to x times the side of the terrace, one square island formed solely of monolayers of the second material and of a side equal to (1−x) times the side of the terrace, and of two islands formed of an alternation of a monolayer of the first material and a monolayer of the second material.