Stopping Mask Hotspots Before They Escape The Mask Shop


By Aki Fujimura The same types of physics-based issues that have haunted lithography for decades have started to impact mask writing as well. The increasingly small and complex mask shapes specified by optical proximity correction (OPC) that are now required for faithful wafer lithography at 28nm-and-below nodes have given rise to an increase in mask hotspots. Mask hotspots occur when the shap... » read more

Non-Visual Defect Inspection: The Tech of Tomorrow?


Remember when it first became obvious that the semiconductor manufacturing industry was going to expect lithography to resolve features smaller than the wavelength of light used in the litho tools themselves? Thanks to techniques such as the use of phase shift photomasks, sub-wavelength lithography is standard in chip fabs today. It might even be viewed as “old hat,” although still an ex... » read more

Experts At The Table: Issues In Metrology And Inspection


By Mark LaPedus Semiconductor Manufacturing & Design sat down to discuss future metrology and inspection challenges with John Allgair, senior member of the technical staff at GlobalFoundries; Kevin Heidrich, vice president of marketing and business development at Nanometrics; Robert Newcomb, executive vice president at Qcept Technologies; and Shrinivas Shetty, vice president of marketing f... » read more

Experts At The Table: Issues In Metrology And Inspection


By Mark LaPedus Semiconductor Manufacturing & Design sat down to discuss future metrology and inspection challenges with John Allgair, senior member of the technical staff at GlobalFoundries; Kevin Heidrich, vice president of marketing and business development at Nanometrics; Robert Newcomb, executive vice president at Qcept Technologies; and Shrinivas Shetty, vice president of marketing f... » read more

Non-visual defect inspection gives fabs better eyes, new insights


For a long time, semiconductor defect inspection focused on particles, and particle defects remain an important cause of yield loss. But as devices have become more complex, additional kinds of defects have drawn the attention of process engineers. Bridging, pattern collapse, and other resist defects have become particularly important in the sub-100 nm era. The introduction of CMP brought abras... » read more

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