Patent ID: 6673706
Filing Date: 2004-01-06
Classification: G03F,H01L

Abstract:
A method of forming a pattern in the manufacturing of a semiconductor device, comprising the steps of:forming a target layer on a pattern defining a step on a substrate such that the target layer conforms to said pattern; forming a photoresist layer on the target layer, whereby the photoresist layer has an upper surface situated above the target layer, and wherein the photoresist layer is of at least one photoresist composition selected from the group consisting of a first photoresist composition comprising a first novolak resin and a photoactive compound of 3-15 wt % based on the total weight of the first novolak resin, a second photoresist composition comprising a first novolak resin, a second novolak resin of 10-60 wt % based on the total weight of the first novolak resin and having a rate of dissolution in a developing solution of 300-1500 Ã¥/sec, and a photoactive compound of 15-30 wt % based on the total weight of the first novolak resin, and a third photoresist composition comprising a first novolak resin, polyhydroxystyrene of 10-60 wt % based on the total weight of the first novolak resin, and a photoactive compound of 15-30 wt % based on the total weight of the first novolak resin; dissolving a portion of the photoresist layer over a first area, without having exposed the photoresist layer in said first area, by soaking the photoresist layer in a developing solution until the upper surface thereof is situated below the upper surface of the step, and thereby leaving a portion of the photoresist layer undissolved over the entire said first area to form a photoresist pattern that exposes part of the target layer; removing the exposed part of the target layer to form a pattern; and subsequently removing the photoresist pattern.