Patent Number: 
Section: claims

1. A method of treating a plurality of features on a surface of a workpiece using a gas cluster ion beam, the method comprising:measuring an attribute of the features;correlating the attribute of each of the features with a spatial location on the surface to generate a spatial map;directing ionized clusters in the gas cluster ion beam toward the surface of the workpiece; andbased on the spatial map, modulating delivery of the gas cluster ion beam across the surface of the workpiece so that different features in different regions on the surface receive different doses of the ionized clusters. 2. The method of claim 1 wherein the attribute is a dimension of the features, and measuring the attribute of the features further comprises:measuring the dimension of each of the features; andassessing a non-uniformity of the dimension among the features to generate the spatial map. 3. The method of claim 2 wherein modulating delivery of the gas cluster ion beam further comprises:selecting the different doses to reduce the non-uniformity of the dimension among the features. 4. The method of claim 2 wherein the features are recesses extending into the surface, and modulating the delivery of the gas cluster ion beam further comprises:etching the recesses in the different regions of the surface by different amounts to reduce the non-uniformity of the dimension among the recesses. 5. The method of claim 2 wherein the features are recesses extending into the surface, and modulating the delivery of the gas cluster ion beam further comprises:depositing different amounts of a material inside the recesses in the different regions of the surface to reduce the non-uniformity of the dimension among the recesses. 6. The method of claim 2 wherein the features are three-dimensional bodies projecting from the surface, and modulating the delivery of the gas cluster ion beam further comprises:etching the three-dimensional bodies by different amounts in the different regions of the surface to reduce the non-uniformity of the dimension among the three-dimensional bodies. 7. The method of claim 2 wherein the features are three-dimensional bodies projecting from the surface, and modulating the delivery of the gas cluster ion beam further comprises:depositing different amounts of a material on the three-dimensional bodies in the different regions of the surface to reduce the non-uniformity of the dimension among the three-dimensional bodies. 8. A method of using a gas cluster ion beam, the method comprising:measuring an attribute of the features on a plurality of workpieces;correlating the attribute of each of the features with a spatial location on the surface to generate a spatial map;directing ionized clusters in the gas cluster ion beam toward the surface of another workpiece; andbased on the spatial map, modulating delivery of the gas cluster ion beam across the surface of the another workpiece so that different features in different regions on the surface of the another workpiece receive different doses of the ionized clusters. 9. The method of claim 8 wherein the attribute is an electrical property, and measuring the attribute of the features on the plurality of workpieces further comprises:assessing a non-uniformity of the electrical property among the features on the surface of each of the plurality of workpieces to generate the spatial map. 10. The method of claim 8 wherein the attribute is a dimension of the features, and measuring the attribute of the features further comprises:measuring the dimension of each of the features on the surface of each of the plurality of workpieces; andassessing a non-uniformity of the dimension among the features to generate the spatial map. 11. The method of claim 10 wherein modulating delivery of the gas cluster ion beam further comprises:selecting the different doses to reduce the non-uniformity of the dimension among the features on the surface of the another workpiece. 12. The method of claim 10 wherein the features are recesses extending into the surface of the plurality of workpieces and the another workpiece, and modulating the delivery of the gas cluster ion beam further comprises:etching the recesses in the different regions of the surface of the another workpiece by different amounts to reduce the non-uniformity of the dimension among the recesses. 13. The method of claim 10 wherein the features are recesses extending into the surface of the plurality of workpieces and the another workpiece, and modulating the delivery of the gas cluster ion beam further comprises:depositing different amounts of a material inside the recesses in the different regions of the surface of the another workpiece to reduce the non-uniformity of the dimension among the recesses. 14. The method of claim 10 wherein the features are three-dimensional bodies projecting from the surface of the plurality of workpieces and the another workpiece, and modulating the delivery of the gas cluster ion beam further comprises:etching the three-dimensional bodies in the different regions of the surface of the another workpiece by different amounts to reduce the non-uniformity of the dimension among the three-dimensional bodies. 15. The method of claim 10 wherein the features are three-dimensional bodies projecting from the surface of the plurality of workpieces and the another workpiece, and modulating the delivery of the gas cluster ion beam further comprises:depositing different amounts of a material on the three-dimensional bodies in the different regions of the surface of the another workpiece to reduce the non-uniformity of the dimension among the three-dimensional bodies.