You mean resist contrast curve? Should you be able to get it from the manufacturer's data sheet? They usually give you dose-to-clear value for reference. Best regards, Isaac Chan, Ph.D. Sr. Process Engineer Work: 519.888.4567 x6014 "Innovate. Lead. Succeed." On Tue, 10 Jan 2006, haixinzhu wrote: > Hello, > > I am wondering where I can find the info regarding the requsted exposure > dose for 1um thick OCG 825 (10um line width) and 10um AZP4620(10um line > width). I believe the dose is related to the thickness and line width > through some function or equation, but just could not find it out. Anyone > can give me a hand? > > Thanks > > BTW: I am using Karl Suss aligner.