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Investigation on the material removal and surface generation of a single crystal SiC wafer by ultrasonic chemical mechanical polishing combined with ultrasonic lapping

Materials, ISSN: 1996-1944, Vol: 11, Issue: 10
2018
  • 40
    Citations
  • 0
    Usage
  • 33
    Captures
  • 1
    Mentions
  • 92
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    40
  • Captures
    33
  • Mentions
    1
    • Blog Mentions
      1
      • Blog
        1
  • Social Media
    92
    • Shares, Likes & Comments
      92
      • Facebook
        92

Article Description

A new method of ultrasonic chemical mechanical polishing (CMP) combined with ultrasonic lapping is introduced to improve the machining performance of carbide silicon (SiC). To fulfill the method, an ultrasonic assisted machining apparatus is designed and manufactured. Comparative experiments with and without ultrasonic assisted vibration are conducted. According to the experimental results, the material removal rate (MRR) and surface generation are investigated. The results show that both ultrasonic lapping and ultrasonic CMP can decrease the two-body abrasion and reduce the peak-to-valley (PV) value of surface roughness, the effect of ultrasonic in lapping can contribute to the higher MRR and better surface quality for the following CMP. The ultrasonic assisted vibration in CMP can promote the chemical reaction, increase the MRR and improve the surface quality. The combined ultrasonic CMP with ultrasonic lapping achieved the highest MRR of 1.057 μm/h and lowest PV value of 0.474 μm. Therefore this sequent ultrasonic assisted processing method can be used to improve the material removal rate and surface roughness for the single crystal SiC wafer.

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