Patent ID: 8883029
Filing Date: 2014-11-11
Classification: B05D,C23C,H01J,H01L

Abstract:
1. A method of making a Si containing gas distribution member which supplies process gas into a semiconductor plasma processing chamber comprising: forming a carbon member into a form corresponding to an internal cavity structure of the Si containing gas distribution member; depositing a Si containing material on the formed carbon member such that the Si containing material forms a shell of a predetermined thickness around the formed carbon member; machining the Si containing shell into the structure of the Si containing gas distribution member wherein the machining forms gas inlet and outlet holes exposing a portion of the formed carbon member in an interior region of the Si containing gas distribution member; and removing the formed carbon member from the interior region of the Si containing gas distribution member with a gas that reacts with carbon, dissociating the carbon atoms, which may thereby be removed from the interior region of the Si containing gas distribution member leaving a shaped internal cavity in the interior region of the Si containing gas distribution member.