Microposit LOL 2000 lift-off layer is an enhanced dissolution rate, dyed PMGI (polyme- thylglutarimide) solution used for lift-off processes requiring tight CD control, such as GMR thinfilm head, GaAs, and other leading-edge semiconductor applications. The LOL bilayer lift-off process is suitable for applications where a thin layer of metal is sputtered or evaporated in an addi- tive process. CD variation due to etch bias inherent in substractive processes is eliminated, resulting in superiormetallinewidthcontrol.Attackonthe substrates by an etchant is eliminated.