Patent ID: 6942816
Filing Date: 2005-09-13
Classification: H01L

Abstract:
1. In a plasma processing system having therein a plasma processing chamber, a method for substantially reducing photoresist wiggling while etching a feature into a layer on a substrate, comprising: introducing the substrate having thereon the layer disposed below a photoresist mask into the plasma processing chamber; flowing an etchant source gas mixture into the plasma processing chamber, wherein the etchant source gas mixture comprises xenon and an active etchant, wherein a flow rate of the xenon is at least 35% of etchant source gas mixture, wherein the etchant gas source mixture further comprises argon, wherein the flow rate of the xenon is between about 50%-90% of a sum of flow rates of the argon and xenon; striking a plasma from the etchant source gas mixture; and etching the feature into the layer with the plasma from the etchant source gas mixture, wherein the flow rate of xenon reduces photoresist wiggling.