Patent ID: 6334581
Filing Date: 2002-01-01
Classification: B05B,B05C

Abstract:
A resist spray nozzle reposition device comprising:a spray nozzle with an approximately rectangular shape being used to spray resist onto a midpoint of a spinning semiconductor wafer; a rotary robot arm comprising a resist-transmitting line, the resist-transmitting line connected to an end of the spray nozzle; a covering nut having an opening with a diameter D; a reposition ring comprising a rotary part with a diameter less than or equal to D, and at least two protrusions, the rotary part positioned through the opening of the covering nut; a fixing ring used to connect the covering nut and the rotary robot arm, the fixing ring comprising two recesses that are positioned to correspond with the two protrusions; and a spring used to provide a force to keep the reposition ring in tight contact with the fixing ring, the spring being positioned between the covering nut and the reposition ring; wherein to move the spray nozzle, the rotary part of the reposition ring is pulled out against the force of the spring and rotated together with the spray nozzle by an angle, and by continuing to rotate the rotary part, the spray nozzle can be self-aligned and repositioned on the midpoint of the semiconductor wafer due to interaction between the protrusions and the recesses.