Patent ID: 6880724

Claim:
A photoresist supply system, comprising: a first storage bottle for storing a photoresist material, the first storage bottle having an outlet; a second storage bottle for storing a photoresist material, the second storage bottle having an outlet; a first reservoir having a reservoir inlet coupled in flow communication with the first storage bottle; a second reservoir having a reservoir inlet coupled in flow communication with the second storage bottle; a first vacuum pump coupled in flow communication with the first reservoir; a second vacuum pump coupled in flow communication with the second reservoir; a bottle auto-change valve coupled in flow communication with an outlet of the first reservoir and with an outlet of the second reservoir; and a dispense reservoir coupled in flow communication with the bottle auto-change valve through a dispense inlet pipe, wherein the bottle auto-change valve is configured to selectively couple the dispense reservoir in flow communication with one of the first reservoir and the second reservoir.