Hi Timo:
Below is the trans function of CTQ_WRT_WDTH and DCBN vs the ESTBP from mass prod. Normally the short ESTBP will bring the wider WPE and higher DCBN, as you mentioned in mail. Is that mean EST_BP is longer of the pi-lot because it show narrow WPE ~ 2.7x? So the ESTBP value of the pi-lot and child lot is important for us to understand the issue. Pls help to correct me if my understanding is wrong, :) .