Patent ID: 8082066
Filing Date: 2011-12-20
Classification: G05D,H01L,Y10T

Abstract:
1. A computer program product comprising a non-transitory computer readable storage medium storing a set of computer instructions, executable by a computer processor, wherein the set of computer instructions comprise instructions executable to: generate a flow control signal to close a fluid control valve based on a first close rate parameter for a first segment of a close range; generate a flow control signal to close the fluid control valve based on a second close rate parameter for a second segment of the close range; determine that the fluid control valve has closed; generate a suckback control signal configured to cause a suckback valve to push a fluid to an end of a nozzle in response to the determination that the fluid control valve has closed; and generate a suckback control signal configured to cause the suckback valve to draw the fluid into the nozzle after the fluid has reached the end of the nozzle; wherein the first close rate parameter is a first acceleration factor corresponding to a first rate of change in a close rate acceleration and the second close rate parameter corresponds to a second rate of change in the close rate acceleration.