Patent ID: 7166161

Claim:
A method for obtaining an anisotropic film comprising the steps of: providing a substrate, depositing by means of Cascade Crystallization Process at least one conjugated aromatic crystalline layer onto said substrate, wherein said conjugated aromatic crystalline layer is characterized by a globally ordered crystalline structure with an intermolecular spacing of 3.4±0.3 Å in the direction of one of optical axes, and formed by rodlike supramolecules, which comprise at least one polycyclic organic compound with a conjugated π-system and ionogenic groups, and applying an external action upon at least one deposited conjugated aromatic crystalline layer, wherein said external action is characterized by duration, character and intensity which are selected so as to ensure partial removal of ionogenic groups from the conjugated aromatic crystalline layer while retaining the crystalline structure after termination of the external action.