METHOD FOR DEPOSITING FILMS ON SEMICONDUCTOR WAFERS

An exemplary embodiment of the present invention provides a method of depositing of a film on semiconductor wafers. In a first step, a film thickness of 3 um or less is deposited on wafers accommodated in a wafer boat in a vertical furnace at a deposition temperature of the furnace while a deposition gas is flowing. During the first step, the temperature may be held substantially constant. In a second step, a temperature deviation or variation of at least 50° C. from the deposition temperature of the first step is applied and the furnace temperature is returned to the deposition temperature of the first step while the flow of the deposition gas is stopped. The first and second steps are repeated until a desired final film thickness is deposited.