Looks like CF 1st batch DCBN was not as high as 2nd&3rd batch. Could you simulate ET yld. base on 1st batch with the propose spec., how ET yld. will be ?
2ndly, for those high DCBN high wafer what is the optimize WPE to maximize ET yld. ? Those wafer WPE wide will even driven DCBN worst. Not sure narrow WPE will help.