摘要:
A method of patterning a photoresist layer includes forming a photoresist layer on a substrate, exposing the photoresist layer to light using a first light source so as to induce a chemical change in the photoresist layer, performing a post-exposure bake process on the photoresist layer, the post-exposure bake process including irradiating the photoresist layer with at least two shots of laser light from a second light source such that the photoresist layer is heated to a first temperature, and performing a developing process on the photoresist layer after the post-exposure bake process, the development process selectively removing a portion of the photoresist layer.
摘要:
A reflective extreme ultraviolet mask includes a mask substrate having an exposing region and a peripheral region, the mask substrate including a light-scattering portion in the peripheral region, a reflective layer on an upper surface of the mask substrate, the reflective layer having a first opening exposing the light-scattering portion, and an absorbing layer pattern on the reflective layer, the absorbing layer pattern having a second opening in light communication with the first opening.
摘要:
An EUV projection lens includes a substrate and concentric diffraction patterns on the substrate. The concentric diffraction patterns have an out-of phase height with respect to EUV light and include a material through which the EUV light has a transmittance higher than about 50% at the out-of phase height. The EUV projection lens has a high first order diffraction light efficiency and an optic system having the EUV projection lens has a high resolution.
摘要:
In a method of measuring a phase of a phase shift mask, initial extreme ultraviolet (EUV) light is divided into secondary EUV light portions. The secondary EUV light portions are irradiated onto the phase shift mask as incident EUV light portions, and the phase of the phase shift mask is measured from reflected incident EUV light portions.
摘要:
A zoneplate includes a first pattern having a first thickness, the first pattern including a first material, and a second pattern adjacent to the first pattern and having a second thickness larger than the first thickness, the second pattern including a second material, incident light incident on the first pattern from the outside passing through the first pattern, and incident light incident on the second pattern from the outside passing through the second pattern.