Process of modifying the initial strain state of the active layer to the final strain state

摘要

The process comprises the steps of a) providing a first substrate (1) comprising an active layer (10) made of a first material having a Young's modulus E1 and having a thickness h1, and b) having a Young's modulus E2. Providing a second substrate (2) made of a second material and having a thickness h2, and c) a first substrate (1) and a second substrate so as to have a curved shape with a radius of curvature R, respectively. Bending the substrate (2); and d) bonding the second substrate (2) to the active layer (10) so that the second substrate (2) closely follows the shape of the first substrate (1). And e) re-establishing the initial resting shape of the second substrate (2), the process wherein the second material of the second substrate (2) is E2 / E1 10-2 It is a flexible material that keeps the relationship, and the thickness of the second substrate (2) keeps the relationship of h2 / h1 ≧ 104 , And the radius of curvature is noteworthy in that to protect the relationship R = h2 / 2ε. [Selection] Fig. 1d