Patent ID: 6391378
Filing Date: 2002-05-21
Classification: H05K

Abstract:
A method for dispensing material onto a top surface of a substrate using a dispensing system having a dispensing apparatus that dispenses the material at a dispensing distance from the top surface of the substrate, the method comprising steps of:loading a substrate onto a support plate of the dispensing system; positioning a measuring probe above the substrate at a predetermined height above the support plate; measuring a distance between the measuring probe and the top surface of the substrate; using the distance measured, positioning the dispensing apparatus at a height above the support plate such that the dispensing apparatus is at the dispensing distance above the top surface of the substrate; and dispensing material onto the substrate; wherein the measuring probe has a probe end, and the measuring probe has a retracted state and an actuated state, and wherein the step of measuring further includes steps of: positioning the measuring probe, in the retracted state, above the substrate; and switching the probe from the retracted state to the actuated state, such that the probe end is positioned on the top surface of the substrate.