Patent ID: 7884050

Claim:
A wet-chemical process for the production of a textured, band-shaped HTSL with pinning centers, the method comprising: (a) applying a base precursor solution to a textured carrier having a concentration of pinning centers c 0 ; (b) drying the precursor solution to form a base precursor layer; (c) annealing the layer to form a high temperature superconductor layer; and (d) repeating at least the applying step (a) and the drying step (b) to form an additional precursor layer disposed over the base precursor layer, wherein: the applying and drying steps are repeated i times, i being a natural number greater than 0; and each additional precursor layer applied during the repetition step (d) comprises a concentration of pinning centers c i , wherein: the concentration c 0 of pinning centers in the base precursor solution is less than the concentration c 1 of pinning centers in the additional precursor solution applied during the first repetition step (d) such that 0<c 0 <c 1 , the repetition step (d) includes an i th and j th repetition of step (a), d i <d j , with d i designating the layer thickness of the layer applied during the i th repetition step (a) and d j designating the layer thickness of the layer applied during the j th repetition of step of (a), c i <c j , applies to layers i, j, with c i designating the concentration of the pinning centers of the precursor solution applied during the i th repetition of step (a) and c j designating the concentration of pinning centers of the precursor solution applied during the j th repetition of step of (a).