Transcription of Semiconductor Wafer Edge Analysis
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Semiconductor Wafer Edge Analysis
Semiconductor Wafer Edge Analysis /1 Semiconductor Wafer Edge Analysis Chapman Technical Note-TW-1 Rev-98-07 Semiconductor Wafer Edge Analysis /2 Introduction The reason for evaluating Semiconductor Wafer edge microroughness is that edge defects can sometimes adversely affect Semiconductor performance. Problems range from features that trap liquid or airborne particles to rough surface protrusions that may become detached and release silicon particles during processing. These problems have led to an ASTM standards effort that includes the definition of a standard for the measurements of the surface topography of Semiconductor edges. Chapman Instruments has participated in recent activities of both ASTM and SEMI standards committees.
Semiconductor Wafer Edge Analysis/4 ... power spectral density, and autocovariance. Figure 3 The bottom plot depicts the roll-off profile of the transition region of the edge. The roll-off ... For advanced devices, it is often necessary to eliminate the high peaks and deep valleys
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