Patent ID: 7534363

Claim:
A method for removing organic material over a substrate, comprising: placing the substrate in a plasma processing chamber; providing a first gas to an inner zone within the plasma processing chamber, wherein the first gas is provided to the inner zone via a first set of holes in a top plate of the plasma processing chamber, wherein the top plate is located above the substrate, wherein the inner zone comprises an organic material removing gas, wherein the first gas has no carbon containing component; providing a second gas to an outer zone of the plasma processing chamber, wherein the outer zone surrounds the inner zone and the second gas has a carbon containing component, wherein a concentration of the carbon containing component of the second gas is greater than a concentration of the carbon containing component in the first gas, and wherein the second gas is provided to the outer zone via a second set of holes in the top plate; simultaneously generating plasmas from the first gas and second gas; removing some of the organic material using the generated plasmas.