Transcription of Chemical Mechanical Planarization - bitsonchips
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Chemical Mechanical Planarization - bitsonchips
SIMTech Technical Report (PT/01/003/JT) Chemical Mechanical Planarization Dr Wang Zhengfeng Dr Yin Ling Ng Sum Huan Teo Phaik Luan (Joining Technology Group, Process Technology Division, 2001) Chemical Mechanical Planarization PT/01/003/JT Keywords: Chemical Mechanical Planarization (CMP); Copper damascenes process; Semiconductor industry; Metrology; Microelectromechanical system (MEMS) 1 1 BACKGROUND Chemical Mechanical Planarization (CMP) is a process that can remove topography from silicon oxide, metal and polysilicon surfaces. It is the preferred Planarization step utilized in deep sub-micron IC manufacturing. More recent scaling of transistor critical dimension has required the use of CMP for applications such as shallow trench isolation (STI) and trenched metal interconnection (Cu damascene).
Chemical Mechanical Planarization PT/01/003/JT 2 During the CMP of patterned copper wafers, two phenomena – copper dishing and SiO2 erosion – lead to deviations from the ideal case depicted in …
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