Patent ID: 6715506
Filing Date: 2004-04-06
Classification: B05C,G01F,H01L,Y10T

Abstract:
A fixed-amount-of-liquid ejecting method for ejecting a liquid in fixed amount from a liquid reservoir through an ejection valve, said method comprising a step ofsensing a first pressure value at a first location in a syringe holding the liquid and a second pressure value at a second location in the ejection valve; applying a pressure to the liquid beforehand prior to starting ejection of the liquid; and/or holding a pressure near an ejection orifice after the end of liquid ejection at a predetermined specific value using a push member disposed to push a liquid stored in the liquid reservoir so that an ejection rate of the liquid through said ejection orifice is kept constant, wherein the applying and the holding of the pressure is based on the sensing of the first pressure value and the second pressure value.