Patent ID: 9290859
Filing Date: 2016-03-22
CPC Classification: B01D,C01B,C30B,Y10T

Claim Text:
1. A method for preparing a thin or thick film, comprising the steps of: (1) arranging non-spherical seed crystals on a substrate such that all the a-, b- and c-axes of each seed crystal are oriented under a predetermined rule; and (2) forming and growing the film from the seed crystals through secondary growth by exposing the arranged seed crystals of step (1) to a seed crystal growth solution containing a structure-directing agent, which induces only secondary growth from the surface of the seed crystals without inducing crystal nucleation in the crystal growth solution or on the seed crystal surface, wherein in step (1), the seed crystals have all the a-, b- and c-axes thereof oriented uniformly on the substrate, such that all the a-axes of the seed crystals are parallel to each other, all the b-axes of the seed crystals are parallel to each other, and all the c-axes of the seed crystals are parallel to each other, wherein in step (2), the seed crystals are two-dimensionally connected to each other and three-dimensionally grow perpendicular to the substrate surface by secondary growth from the seed crystal surface, to thereby form the film.