MCC8: Throughput enhancement of EB direct writer

To obtain higher throughput of more than 5 wafer per hour (WPH), authors propose a high throughput 50 kV e-beam direct writer MCC8 that has eight column. MCC8 has multi column cell (MCC), character projection (CP) with design for e-beam (DFEB) and high current density technologies. Proof-of-concept evaluations for combination between MCC and CP have finished in the MASK-D2I project of ASET, including mix-and-match overlay results of better than 5 nm. By the combination of these proven technologies, MCC8 realizes a throughput of 5 WPH. Furthermore, over 30 WPH can be realized by clustering six MCC8s together.