Surface profile adjustment using gas cluster ion beam processing
First Claim
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1. A method of performing corrective processing of a surface on a workpiece, comprising:
- preparing correction data for a workpiece, said correction data being computed from metrology data that is related to a surface profile of a surface on said workpiece;
selectively forming a sacrificial material on one or more regions of a surface on said workpiece using a gas cluster ion beam (GCIB), wherein an amount of said sacrificial material formed on said one or more regions of said surface by said GCIB is determined according to said correction data; and
adjusting a surface profile of said surface on said workpiece by performing an etching process following said selective formation, wherein said etching process comprises etching said sacrificial material at a first etch rate, and etching said workpiece at a second etch rate.
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Abstract
A method of treating a workpiece is described. The method comprises selectively forming a sacrificial material on one or more regions of a substrate or a layer on the substrate using a gas cluster ion beam (GCIB), and adjusting a surface profile of a surface on the substrate or the layer on the substrate by performing an etching process following the selective formation.
24 Citations
20 Claims
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1. A method of performing corrective processing of a surface on a workpiece, comprising:
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preparing correction data for a workpiece, said correction data being computed from metrology data that is related to a surface profile of a surface on said workpiece; selectively forming a sacrificial material on one or more regions of a surface on said workpiece using a gas cluster ion beam (GCIB), wherein an amount of said sacrificial material formed on said one or more regions of said surface by said GCIB is determined according to said correction data; and adjusting a surface profile of said surface on said workpiece by performing an etching process following said selective formation, wherein said etching process comprises etching said sacrificial material at a first etch rate, and etching said workpiece at a second etch rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of performing corrective processing on a workpiece, comprising:
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acquiring metrology data related to a surface profile of a surface on a workpiece; computing correction data for said workpiece using said metrology data; applying said correction data to said workpiece using a gas cluster ion beam (GCIB) to selectively form a sacrificial material on one or more regions of a surface on said workpiece; and performing an etching process to remove said sacrificial material and at least a portion of said surface on said workpiece. - View Dependent Claims (13, 14, 15, 16)
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17. A method of performing corrective processing of a surface profile on a workpiece, comprising:
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identifying a minimum surface height for one or more first regions and a maximum surface height for one or more second regions of an initial uneven surface profile to establish an initial value of a height differential; preparing correction data for a workpiece, said correction data being computed from metrology data that is related to the surface profile of a surface on said workpiece; selectively forming a sacrificial material on said one or more first regions of said workpiece using a gas cluster ion beam (GCIB) to effectively increase said minimum surface height and decrease said height differential from said initial value, wherein an amount of said sacrificial material formed on said one or more regions of said surface by said GCIB is determined according to said correction data; and adjusting the surface profile of said workpiece to a target surface profile having a target value for said height differential that is less than said initial value by performing an etching process following said selective formation, wherein said etching process comprises etching said sacrificial material at a first etch rate, and etching said workpiece at a second etch rate. - View Dependent Claims (18, 19, 20)
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Specification