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Indexed by:会议论文

Date of Publication:2008-01-01

Included Journals:CPCI-S

Volume:53-54

Page Number:265-271

Key Words:Polishing pad; Talysurf CLI 2000; 3D topography; Sampling interval; Sampling area

Abstract:Among the properties of polishing pad, the surface roughness plays a crucial role in CMP (Chemical Mechanical Planarization) process. However, there is no acknowledged standard for measuring and characterizing the roughness of pad surface in 3D measurement. In this paper Talysurf CLI 2000 working on the principle of dynamic confocal measurement was initially suggested to measure the 3D surface topography of polishing pads through theoretical and experimental analysis. In addition, based on the Nyquist folding frequency and the statistical theory, a selection technique for sampling interval and sampling area was proposed and verified through experiments. The results showed that Talysurf CLI 2000 is more suitable than NewView to measure the 3D surface topography of polishing pads. 2 mu m sampling interval, 0.5 x 0.5mm(2) sampling area and 10 mu m interval, 1x1mm(2) area are respectively recommended for IC1000/SubaIV and SubaIV polishing pad.