Patent Number: 8,871,022

Title: Systems and methods for preparation of epitaxially textured thick films

Abstract: The disclosed subject matter relates to the use of laser crystallization of thin films to create epitaxially textured crystalline thick films. In one or more embodiments, a method for preparing a thick crystalline film includes providing a film for crystallization on a substrate, wherein at least a portion of the substrate is substantially transparent to laser irradiation, said film including a seed layer having a predominant surface crystallographic orientation; and a top layer disposed above the seed layer; irradiating the film from the back side of the substrate using a pulsed laser to melt a first portion of the top layer at an interface with the seed layer while a second portion of the top layer remains solid; and re-solidifying the first portion of the top layer to form a crystalline laser epitaxial with the seed layer thereby releasing heat to melt an adjacent portion of the top layer.

Inventors: Im; James S. (New York, NY)

Assignee: The Trustees of Columbia University in the City of New York

International Classification: C30B 1/00 (20060101); C30B 3/00 (20060101); C30B 5/00 (20060101); C30B 28/02 (20060101)

Expiration Date: 2018-10-28 0:00:00