Patent ID: 9461239
Filing Date: 2016-10-04
CPC Classification: H01L

Claim Text:
1. A method of producing a crystallized film comprising: forming an amorphous layer on a lower electrode film, wherein the lower electrode film is a light absorption layer formed on one surface of a support substrate that is made of silicon, the light absorption layer being a heat resistant film having a melting point of greater than or equal to 1000° C., and the light absorption layer being any one of a metal film including any one metal of Pt, Ir, Pd, Rh, W, Fe, Ni, Ta, Cr, Zr, Ti and Au; a metal alloy film including any one metal alloy of Pt, Ir, Pd, Rh, W, Fe, Ni, Ta, Cr, Zr, Ti and Au; and a laminated film that is formed by selecting the metal film or the metal alloy film, and by laminating a plurality of the selected films; and heating the lower electrode film by irradiating a laser beam light that passes through the support substrate onto the lower electrode film from another surface of the support substrate with a temperature that can crystallize the amorphous layer to form a complex oxide film, the temperature being above a crystallization temperature of the amorphous layer and below a melting point of the light absorption layer, wherein the another surface of the support substrate is a surface opposite to the one surface of the support substrate, and the heating irradiates the laser beam of fixed power, irrespective of the thickness of the amorphous layer, wherein the support substrate is formed on another surface of the light absorption layer, and the method further including controlling a heating area of the lower electrode film to a limited area by focusing the laser beam light that is irradiated onto the another surface of the light absorption layer, and absorbing 90% or more of light energy of laser beam light that enters the support substrate by the light absorption layer.