A cluster tool may be operated on {TAIL ~ the basis} of an enhanced sequencing regime in which the supply of substrates is controlled such that {HEAD ~ a planned time} of maintenance is reached for two or more process chambers simultaneously 
A cluster tool may be operated on { TAIL ~ the basis } of an enhanced sequencing regime in which the supply of substrates is controlled such that { HEAD ~ a planned time } of maintenance is reached for two or more process chambers simultaneously
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH