Patent ID: 9162247
Filing Date: 2015-10-20
Classification: B05C,B05D,G03F,G16Z,H01L,Y02A

Abstract:
1. A coating treatment apparatus that supplies a coating solution to a front surface of a rotated substrate and that diffuses the supplied coating solution to an outer periphery side of the substrate said apparatus comprising: a substrate holding part holding said substrate; a rotation part rotating the substrate held on said substrate holding part; a supply part supplying a coating solution to a front surface of the substrate held on said substrate holding part; an airflow control plate for changing an air flow above said substrate, said airflow control plate is provided at a predetermined position above said substrate, said substrate is held on said substrate holding part; a drive part moving said airflow control plate between the predetermined position and a waiting position not directly above said substrate held on said substrate holding part; and a control unit configured to control an operation of said rotation part, an operation of said supply part, and an operation of said drive part, wherein said airflow control plate is configured to move to the predetermined position for changing the airflow above said substrate during rotation by said rotation part, wherein said control unit is configured to control said supply part to supply the coating solution to the front surface of said substrate when said substrate is rotated at a first rotation speed by said rotation part, wherein the first rotation speed diffuses the supplied coating solution to an outer periphery side of the substrate, then wherein said control unit is configured to control said drive part to change the airflow above said rotated substrate by moving said airflow control plate to the predetermined position, after said control unit is configured to control said supply part to stop the supply of the coating solution to the front surface of said substrate when said substrate is decelerated to the second rotation speed, wherein said control unit is configured to control said rotation part to rotate, after starting the rotation at the third rotation speed, the substrate at a fourth rotation speed lower than the third rotation speed, and said control unit is configured to control said airflow control plate to change the airflow above the rotated substrate by placing said airflow control plate at the predetermined position by said drive part while rotating the substrate at the fourth rotation speed, when the substrate is rotated at the first rotation speed and the second rotation speed, the outer periphery of the coating solution does not reach the outer periphery of the substrate, when the substrate is rotated at the third rotation speed, the outer periphery of the coating solution reaches the outer periphery of the substrate.