Patent ID: 6232248
Filing Date: 2001-05-15
Classification: C23C,H01L

Abstract:
A method of forming a thin film on a target substrate, said thin film being formed of a material selected from the group consisting of metal oxides, metal nitrides and metals, said method comprising:depositing a thin film in an amorphous state by CVD on said target substrate;placing said target substrate having said thin film deposited thereon on a work table arranged within an airtight process chamber;performing a reforming process for removing organic impurities from said thin film by supplying a process gas containing oxygen atoms into said process chamber and heating over a first period said thin film formed on said target substrate placed on said work table to a first temperature lower than a crystallizing temperature of said material while exhausting said process chamber; andperforming a crystallizing process for crystallizing said thin film after said reforming process by heating said thin film formed on said target substrate placed on said work table to a second temperature higher than said crystallizing temperature, followed by cooling said thin film to a temperature lower than said crystallizing temperature, said first period being longer than a second period during which said thin film has a temperature higher than said crystallizing temperature.