The spindle speed is a function of {TAIL ~ the desired mean thickness} of {HEAD ~ the photoresist}, the barometric pressure and the relative humidity 
The spindle speed is a function of { TAIL ~ the desired mean thickness } of { HEAD ~ the photoresist } , the barometric pressure and the relative humidity
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH