Patent ID: 8282768

Claim:
A purge ring for purging and cleaning a wafer processing chamber, comprising: an inlet portion; an inlet plenum located in said inlet portion, said inlet plenum being fluidically connectable to a gas source; an inlet baffle located in said inlet portion; an exhaust portion; and an exhaust channel located in said exhaust portion, said exhaust channel being located substantially opposite said inlet baffle; wherein said inlet portion and said exhaust portion at least partially define a ring hole space; said ring hole space comprises a periphery; said inlet baffle is operable to convey gas from said inlet plenum into said ring hole space; said inlet baffle comprises a continuous slit; said inlet baffle surrounds not less than about 270° of said periphery; said continuous slit of said inlet baffle is substantially continuous around a peripheral arc not less than about 270°; said exhaust portion is operable to convey gas and other matter out of a purge space; and said purge ring is operable to inhibit deposition of material evolved from a semiconductor substrate during curing.