Patent ID: 6383693
Filing Date: 2002-05-07
Classification: G03F,H05K,Y10S

Abstract:
A method for forming a patterned layer comprising:providing a substrate; forming over the substrate a blanket target layer; forming over the blanket target layer a blanket photoresist layer; exposing, while employing a radiation beam method susceptible to a proximity effect, the blanket photoresist layer to form an exposed blanket photoresist layer which comprises: a main latent pattern comprising a first series of latent patterns; and a second latent pattern comprising a second series of latent patterns adjacent the first series of latent patterns; developing the exposed blanket photoresist layer to form a corresponding patterned photoresist layer comprising: a corresponding main photoresist pattern comprising a first series of patterned photoresist layers; and a corresponding second photoresist pattern comprising a second series of patterned photoresist layers adjacent the first series of patterned photoresist layers; etching, while employing an isotropic etchant, and while employing the patterned photoresist layer as an etch mask layer, the blanket target layer to form a patterned target layer, wherein: each patterned photoresist layer within the first series of patterned photoresist layers has a first linewidth such that not all of the blanket target layer beneath the main photoresist pattern is completely etched within the isotropic etchant; and each patterned photoresist layer within the second series of patterned photoresist layers has a second linewidth such that all of a second portion of the blanket target layer beneath the second photoresist pattern is completely etched within the isotropic etchant.