Patent ID: 7485189

Claim:
A thin film depositing device comprising: a plurality of organic metal gas sources, each organic metal gas source providing a supply of organic metal gas at a selected flow rate, each organic metal gas being carried on a carrier gas; a gas mixing chamber connected to the plurality of organic metal gas sources and mixing a plurality of separately introduced organic metal gases into a mixture state; a reaction chamber receiving the mixture of organic metal gases from the gas mixing chamber and depositing a thin film having a predetermined composition on a substrate, the predetermined composition being determined from the mixture state of the plurality of organic metal gases; a FTIR gas analyzer connected to the gas mixing chamber and directly measuring the mixture state of the organic metal gases within the gas mixing chamber including measuring reactant intermediates and multimers of the plurality of organic metal gases and producing a measurement result; and a control unit receiving the measurement results and individually adjusting the flow rate of each supply of organic metal gas, the control unit having a memory for storing predetermined mixture state parameters of the thin film to be deposited, the control unit for comparing the measurement result with the predetermined mixture state parameters and individually adjusting the flow rates to remove differences between the measurement result and the mixture state parameters.