Patent ID: 7776178

Claim:
Process chamber apparatus comprising: a showerhead having a plurality of gas outlet passageways; a suspension comprising one or more suspension side walls, wherein each suspension side wall includes (i) an upper portion, (ii) a lower portion connected to the showerhead so that the suspension suspends the showerhead below the upper portion, and (iii) a flexible portion extending vertically between the upper portion and the lower portion; a gas inlet passageway; and a gas inlet manifold side wall between the gas inlet passageway and the suspension, wherein the gas inlet manifold side wall provides substantial impedance to gas leakage from the gas inlet passageway to the suspension; wherein the suspension includes a plurality of elongated holes such that: (i) each hole has a longest dimension oriented substantially vertically, (ii) the holes are spaced apart horizontally, and (iii) the flexible portion of each suspension side wall includes one or more of said holes.