Abstract:
A semiconductor film having a crystalline structure is formed by using a metal element that assists the crystallization of the semiconductor film, and the metal element remaining in the film is effectively removed to decrease the dispersion among the elements. The semiconductor film or, typically, an amorphous silicon film having an amorphous structure is obtained based on the plasma CVD method as a step of forming a gettering site, by using a monosilane, a rare gas element and hydrogen as starting gases, the film containing the rare gas element at a high concentration or, concretely, at a concentration of 1x1020/cm3 to 1x1021/cm3 and containing fluorine at a concentration of 1x1015/cm3 to 1x1017/cm3.
Abstract:
A method of crystallizing amorphous silicon on a glass substrate relies on deliberately heating the glass substrate above its strain point during processing, making low temperature glasses, such as soda lime glasses, ideal for such use. Since the glass is plastic above this temperature while the silicon remains elastic, the glass is forced to conform to the shape defined by the silicon once this temperature is exceeded. This process relaxes any stresses which might otherwise be created in the glass or film, as long as the glass temperature is above the strain point. As the glass temperature is reduced back below the strain point, the glass becomes progressively more rigid and stresses will begin to build up in the film and glass. When cooled slowly, the stress in the film and the glass can be controlled by appropriate selection of a thermal expansion coefficient of the glass relative to that of silicon, particularly those with linear expansion coefficients in the range 4-10 ppm/° C. below the strain point.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a perovskite-type oxide single crystal structure, in which shapes of a microstructure are maintained and the structure is uniformly single-crystallized by inducing solid phase epitaxy to single-crystallize a precursor part to obtain a single crystal structure. SOLUTION: The method includes: a step S1 of forming a coating layer on a surface of a seed single crystal substrate, the coating layer containing the same metallic components as those in a predetermined perovskite-type oxide; a step S2 of forming a joint body having a microstructured precursor of the perovskite-type oxide adhered to a surface of the coating layer; and a step S3 of heat-treating the joint body to induce a solid phase epitaxy, and thereby, single-crystallizing the precursor. COPYRIGHT: (C)2010,JPO&INPIT