Patent ID: 7094994

Claim:
A semiconductor wafer heat treatment apparatus comprising: a heating plate for heating a semiconductor wafer to a predetermined temperature; a first temperature measuring unit for measuring temperatures of a semiconductor wafer or a semiconductor wafer equivalent placed on said heating plate at portions preliminarily divided into a plurality of regions; a first controller for controlling the temperature of said semiconductor wafer on said heating plate, for each of said plurality of regions, in accordance with a result of the temperatures measured by said first temperature measuring unit; a cooling plate for cooling said semiconductor wafer heated to said predetermined temperature; a second temperature measuring unit for measuring the temperatures of the semiconductor wafer or the semiconductor wafer equivalent placed on said cooling plate at portions preliminarily divided into a plurality of regions; and a second controller for controlling the temperature of said semiconductor wafer on said cooling plate, for each of said plurality of regions, in accordance with a result of the temperatures measured by said second temperature measuring unit; wherein the first controller controls the temperature of said semiconductor during a temperature-rising time period having a plurality of temperature-rising time period increments for each one of the plurality of regions, each one of the plurality of temperature-rising time period increments being associated with a range of temperature tolerances within which the temperature associated with a particular temperature-rising time period increment is maintained and wherein the second controller controls the temperature of said semiconductor during a temperature-lowering time period having a plurality of temperature-lowering time period increments for each one of the plurality of regions, each one of the plurality of temperature-lowering time period increments being associated with a range of temperature tolerances within which the temperature associated with a particular temperature-lowering time period increment is maintained.