Please see reply from Dr. Achariya (Project manager) as below krub.
1. OK lot number (Evaluation process)
Acha> I'm sorry. We didn't record the lot number on the sample run. We have got this sample from you on AUG-SEP 2015. Would you please check from your side?
2. Polishing steps ( All steps are you using?)
Acha> 15 um SiC--> 3 um SiC ---> SC3 -->AA1 --> CE0.5
3. Yield means Visual checking or Geometry ?
Acha> Both visual checking and Geometry. We found that the fiber height was shorter that 1000 nm (Geometry). The MT end-face showed deep pit with scrath (Visual).
4. Why does your think that this issue is based on SC3-CF ?
Acha> We have run one experiment by maintain all former "brand" polishing film and use only 3 um SIC from MIPOX. From that test, the fiber height was shorter than what we ever have. We still found small pit and scratch on the MT end-face. From my opinion, I have experience with MIPOX film before but this is the first time that CE0.5 in brown color as the final polishing film. I remember that the 0.5 um grain from MIPOX will be in Orange-Pink color with the same 0.5 um grain size. What is the difference between brown film and orange-pink film, please advise? Would you please also advise if I have wrong understanding in some point?