For the ET yield drop because we loaded FRL2.2 slider on both LTBP and non LTBP ka. And we also found the new wafer showed high WIJITA and DCBN that impact to ET yield around 5% ka.
However, we hold the new wafer that high WIJITA (23K) and DCBN (30) around 50K. We plan build combine to normal build but separate work order ka.
Please see chart below ka.