Patent ID: 6864185
Filing Date: 2005-03-08
Classification: G03F

Abstract:
1. A method of forming a feature pattern in a photosensitive layer, comprising: forming the photosensitive layer on a substrate; providing a first mask having a first opaque area thereon; performing a first exposure process with a first dose using the first mask as a photo-mask to form a first unexposed image, which defines a predetermined number of features in the photosensitive layer; performing a second exposure process with a second dose to expose sidewalls of the features of the first unexposed image, wherein a second unexposed image is formed in the photosensitive layer; and developing the photosensitive layer with a development process to form the feature pattern and to define the features apart from at least portions of the exposed sidewalls, to thereby create slim features corresponding to the predetermined number and having smaller widths than widths of the features which would result in developing the photosensitive layer of the first unexposed image.