Patent ID: 7951659
Filing Date: 2011-05-31
Classification: H01L

Abstract:
1. A method of forming a microelectronic device including, on a same support, at least one tensile strained semi-conductor zone, and at least one compressive strained semi-conductor zone, the method comprising: forming from a stack of layers resting on a substrate and comprising at least one semi-conductor layer situated above at least one pre-strained layer, at least one first semi-conductor zone having a first critical dimension L forming one or several trenches in at least a part of a thickness of said pre-strained layer, at least one first trench among said one or several trenches being situated in a continuation of at least one first side of said at least one first semi-conductor zone, the predetermined length Lc having been determined as a function of a thickness of the layers of the stack in which the one or several trenches are formed, and so that the at least one first semi-conductor zone has, following the forming the one or several trenches, a same strain as said pre-strained layer, and said at least one second semi-conductor zone having an opposite strain to that of said pre-strained layer.