Patent ID: 9687873
Date: 2017-06-27
CPC Classifications: B05C,F26B,G03F,H01L

Claim:
1. A coating film forming apparatus, comprising: a spin chuck configured to horizontally hold a substrate; a rotary driving part connected to the spin chuck and configured to rotate the spin chuck about a vertical axis so as to rotate the substrate held in the spin chuck; a coating liquid supply nozzle connected to a coating liquid supply source and configured to supply a coating liquid to a central portion of the substrate; a ring-shaped member annularly installed along a circumferential direction of the substrate so as to cover an upper side of a peripheral edge portion of the substrate; an elevator connected to the ring-shaped member through a support member horizontally supporting the ring-shaped member and configured to relatively move the ring-shaped member up and down with respect to the spin chuck; and a controller configured to control operations of the spin chuck, the rotary driving part, the coating liquid nozzle, and the elevator and programmed to: wherein a distance between a lower surface of the ring-shaped member and the front surface of the substrate in a vertical direction is 5 mm or less in the processing position and 150 mm or more in the retreated position.