Abstract:
A reflective EUV mask and a method of manufacturing the same, the reflective EUV mask including a mask substrate having an exposing region and a peripheral region, the mask substrate including a light scattering crystalline portion that scatters light incident to the peripheral region and that decreases reflectivity of the peripheral region; a reflective layer on an upper surface of the mask substrate, the reflective layer having a first opening that exposes the crystalline portion; and an absorbing layer pattern on an upper surface of the reflective layer, the absorbing layer pattern having a second opening in fluidic communication with the first opening.
Abstract:
Example embodiments of the present invention may provide exposure equipment having an auxiliary photo mask. The exposure equipment may include a light source and a first photo mask spaced apart from the light source by a desired distance. A second photo mask may include a third region and a fourth region. An exposure method using the exposure equipment also may be provided.
Abstract:
A photolithography apparatus includes an optical illumination system. The optical illumination system includes a light source, an illumination system, a photomask, and a projection system. The light source generates light. The illumination system transmits the light generated by the light source. The photomask receives the light transmitted by the illumination system and forms an optical pattern image. The projection system transmits the optical pattern image formed by the photomask to a substrate surface. Either one of the illumination system and the projection system includes at least one mirror for correcting aberrations.
Abstract:
A template, a method of forming the template and a method of forming a photoresist pattern using a lithographic template is disclosed. In the method, a photoresist film is formed on a substrate. A template for selectively transmitting light is pressed on the photoresist film. The template includes a transparent plate through which light passes, a blocking pattern formed thereon for selectively blocking the light passing through the transparent plate, and a plurality of concave and convex portions for imprinting the photoresist film. The concave and convex portions are formed in accordance with the blocking pattern. The photoresist film is partially exposed to light selectively passing through the template, and the photoresist film that has been exposed to the light is also partially developed to form the photoresist pattern.
Abstract:
A method for correcting a position error of a lithography apparatus comprises inputting position data of exposure pattern, irradiating laser light onto a position reference mask from a position measurement laser system, calculating actual position data of the laser light irradiated onto the position reference mask, and comparing the position data of the exposure pattern with the actual position data of the laser light irradiated onto the position reference mask. With this method, circuit patterns can be accurately formed at predetermined positions on a photomask, and the circuit patterns on the photomask can be accurately formed at predetermined positions on a wafer.
Abstract:
A phase shift mask having a first region and a second region in a transverse direction includes a transparent layer, a phase shift pattern disposed in the first region, a transmittance control layer pattern disposed in the second region, and a shading layer pattern disposed on the transmittance control layer pattern. The phase shift pattern has a first pattern including a transparent material and a second pattern including metal. The phase shift mask may prevent haze effects through a cleaning process using an alkaline cleaning solution.
Abstract:
In a method of forming patterns using a phase change material layer a phase change material layer may be formed, and selectively phase-changed along a pattern using an exposure beam or other heat source. A phase change material layer pattern may be formed by selectively removing phase-changed portions using a solution that dissolves only the phase-changed portion.
Abstract:
In the method of forming fine patterns of a semiconductor integrated circuit, a mask layer is formed over a semiconductor structure having a first region and a second region. A portion of the mask layer over the first region is removed to expose the semiconductor structure, and sacrificial layer patterns are formed over the exposed semiconductor structure. Then, spacers are formed on sidewalls of the sacrificial layer patterns and the mask layer, and portions of the spacers are removed to create fine mask patterns. The semiconductor structure is then patterned using the fine mask patterns to create fine patterns.
Abstract:
A method of correcting an optical parameter in a photomask is provided. The method includes providing a photomask, exposing the photomask, detecting an aerial image to estimate the photomask, and irradiating gas cluster ion beams to the photomask based on an estimation result to correct the optical parameter in the photomask in relation to the aerial image. The gas cluster ion beams may be irradiated to a front surface of the photomask on which a mask pattern is formed or a rear surface of the photomask on which the mask pattern is not formed.
Abstract:
A method for correcting a position error of a lithography apparatus comprises inputting position data of exposure pattern, irradiating laser light onto a position reference mask from a position measurement laser system, calculating actual position data of the laser light irradiated onto the position reference mask, and comparing the position data of the exposure pattern with the actual position data of the laser light irradiated onto the position reference mask. With this method, circuit patterns can be accurately formed at predetermined positions on a photomask, and the circuit patterns on the photomask can be accurately formed at predetermined positions on a wafer.