Abstract:
PROBLEM TO BE SOLVED: To provide a mask blank suitable to a photomask for FPD, and the photomask. SOLUTION: The mask blank 10 is for manufacturing an FPD device, and has a substrate 12, a light shield film 14 formed on the substrate 12 by using metal silicide as a material, and an upper-layer film 16 formed on the light shield film 14 by using a material containing chromium. The light shield film 14 and upper-layer film 16 are films to be wet-etched by using an etching mask obtained by patterning a resist film 18 formed on the upper-layer film 16, and the resist film 18 is formed by discharging resist liquid onto the upper-layer film 16 from a nozzle having a resist liquid supply hole extending in one direction and also simultaneously moving the nozzle in a direction crossing the one direction relatively to the upper-layer film surface. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a halftone film type gray tone mask having an excellent pattern shape and cross-sectional shape, and a method for manufacturing it. SOLUTION: The method for manufacturing a gray tone mask having a pattern consisting of a light shielding part, a translucent part, and a semi-translucent part comprises: a process for forming a first resist pattern 23a on a light shielding film 22 formed on a transparent substrate 21; a process for forming a light shielding film pattern 22a by etching the light shielding film using the resist pattern as a mask; a process for forming a semi-translucent film 24 on the light shielding film pattern 22a, and forming a second resist pattern 23b on it, and a process for forming a semi-translucent film pattern 24a by etching the semi-translucent film using the resist pattern as a mask. The material of the semi-translucent film has an etching rate higher than the material of the light shielding film, to an etchant for etching the semi-translucent film. For example, the light shielding film is of the material of which principal component is Cr, and the semi-translucent film is of the material which contains Cr and N. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent or reduce occurrence of foreign matter derived from a bonding agent in the case a phenomenon that the bonding agent is eluted occurs by the influence of heat applied to the bonding agent and by the influence of gravity applied to the bonding agent. SOLUTION: A sputtering target for producing a mask blank has a backing plate 5 having a structure where the part to be joined to a target material 4 is projected to a base part 5' and a whole shape has a projected shape, and has a structure where the target material 4 having a surface area larger than that of the part to be joined with the target material 4 in the backing plate 5 is bulged from the part to be joined to the target material 4 over all the periphery, and they are joined in such a manner that a bonding agent 30 is interposed in the part to be joined with the target material 4. Metal 40 is stuck to the recessed part formed by the combination of the two structures for sealing the elution of the bonding agent 30, and, preferably, for preventing the cooling efficiency in the bulged part of the target material 4 from being damaged. The method of producing a mask blank uses the target. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To obtain a phase shift mask having excellent film characteristics, such as weatherability, light resistance, electrical conductivity and refractive index by constituting light translucent parts of thin films consisting of materials consisting of nitrogen, metals and silicon as main constituting elements and specifying the content of the silicon to atom ratios of a specific range. SOLUTION: The mask patterns to be formed on the transparent substrate 1 of the mask for exposure of fine patterns comprises light transparent parts 2 to allow the transmission of the light of the intensity contributing to the exposure and light translucent parts 3 to allow the transmission of the light of the intensity not contributing to the exposure. The phase of the light transmitted through the light translucent parts 3 is shifted to vary the phase of the light transmitted through the light translucent parts 3 from the phase of the light transmitted through the light transparent parts 2, by which the light rays transmitted near the boundaries of the light translucent parts 3 and the light transparent parts 2 are negated with each other. The light translucent parts 3 are composed of the thin films consisting of materials contg. the nitrogen, metals and silicon as the main constituting elements and the content of the silicon is specified to 34 to 60atom.%.
Abstract:
PURPOSE:To prevent the degradation in sectional shape at the time of overetching by incorporating a chromium carbide, chromium nitride and chromium oxide into an antireflection film and decreasing the degree of oxidation of the antireflection film from a light transparent substrate toward a light shieldable thin film in the thickness direction thereof. CONSTITUTION:The 1st antireflection film 2 consists of the chromium carbonitrooxides and the degree of the oxidation thereof decreases from the light transparent substrate 1 toward the light shieldable thin film 3 in the thickness direction thereof. The degree of the oxidation of the antireflection film 2 is changed in the film thickness direction, by which the side etching rate is suppressed and the prescribed sectional shape is obtd. The etching rate of the antireflection film 2 is matched with the etching rate of the light shieldable thin film 3 laminated thereon by carbonizing the chromium. The formation of the film to the overhang-like sectional shape is prevented in this way.
Abstract:
PURPOSE:To achieve satisfactory adhesion of a resist film onto a light-shielding thin film by allowing a metal thin film on the light-shielding thin film to have properties that it adheres to the resist film applied at the time of the manufacture of a photomask, and that etching can be performed through an etching process at the time of the manufacture. CONSTITUTION:The photomask blank 1 is provided with the light-shielding thin film 3 made of metal silicate on the main surface of a translucent substrate 2 made of quartz glass and also the metal thin film 4 is provided on the light- shielding thin film 3. The metal thin film 4 has the properties that it adheres to a photoresist 5, particularly the photoresist of the positive type, and also has the properties that etching can be performed on it through the etching process. Thus, when the photomask 8 is formed from the photomask blank 1, the photoresist film 5 can be adhered to the light-shielding thin film 3 satisfac torily via the metal thin film 4 without the use of adhesion promoting agent.
Abstract:
PROBLEM TO BE SOLVED: To provide a gray-tone mask blank for a liquid crystal display device to which wet etching is applied. SOLUTION: The gray-tone mask blank for the liquid crystal display device to which wet etching is applied consists of: a translucent substrate constituted of synthetic quartz glass; a semi-translucent film formed on the surface of the translucent substrate; and a light-shielding film formed on the semi-translucent film. The semi-translucent film is made of a material containing molybdenum and silicon, and the ratio (molybdenum:silicon) of molybdenum and silicon contained in the semi-translucent film is 1:2-1:19. In addition, the light-shielding film is made of a material containing chrome and nitrogen. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a photomask blank which can efficiently reduce film stress. SOLUTION: The method for manufacturing a photomask blank having at least a film for forming a mask pattern on a transparent substrate includes a film forming process for sputter-forming the film for forming the mask pattern by causing a sputtering atmosphere to contain at least helium gas and a process for heating the transparent substrate during or after the film forming process. COPYRIGHT: (C)2011,JPO&INPIT