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Critical dimension atomic force microscopy for 0.25-um process development

Advances in AFM technology both in the area of tip manufacturing and tip-to-sample positioning algorithms have enabled their usage in critical dimensions applications within the fab environment. These advancements are permitting the fab engineers to measure device structures in three dimensions. Critical dimension atomic force microscopy (CD-AFM) of 0.25 um CMOS processes being developed by France Telecom CNET (Centre National d'Etude des Telecommunications) within GRESSI project at Grenoble, are presented and compared with traditional semiconductor metrology methods.