Patent ID: 6082629
Filing Date: 2000-07-04
Classification: B05B,B05C,F16K,Y10T

Abstract:
A photoresist suck-back device for a semiconductor device manufacturing system, the suck-back device comprising:a suck-back valve configured to be disposed on a photoresist spray line coupled to a photoresist supply line of a photoresist supply apparatus, the photoresist spray line having a sidewall,wherein the suck-back valve includes a suction chamber for sucking a portion of the photoresist remaining inside said photoresist spray line, said suction chamber being shrinkable and having a shape such that the sucked photoresist is not accumulated therein, and further wherein the suck-back valve is configured to be coupled through an air line to a control part for controlling the size of said suction chamber, the suck-back valve further includes a diaphragm having a fluid-confronting surface that forms a generally planar region of the sidewall of the photoresist spray line that is flush therewith; anda cut-off valve which is installed between said photoresist supply line and said photoresist spray line, and opens/closes said photoresist supply line through said airline.