Abstract:
An object of the present invention is to provide a half-tone phase shift mask blank and a half-tone phase shift mask of which a translucent film has improved acid resistance, alkali resistance and resistance to excimer laser irradiation while maintaining the internal stress of the film within an acceptable range for the intended use. To achieve the aforementioned object, the present invention provides a half-tone phase shift mask blank which comprises a transparent substrate having provided thereon a translucent film comprising at least one thin layer containing silicon and at least one of nitrogen and oxygen and which is to be exposed to light whose center wavelength is 248 nm or shorter, wherein said translucent film is dense such that it has a center-line surface roughness (Ra) of 0.3 nm or smaller.
Abstract:
Fotomasken-Rohling (1) mit einem einlagigen oder mehrlagigen lichtabschirmenden Film (3), der ein Metall enthält, auf einem lichtdurchlässigen Substrat (2), umfassend:eine Phasenverschiebungsschicht zwischen dem lichtdurchlässigen Substrat (2) und dem lichtabschirmenden Film (3),einen Antireflexions-Film (6), der mindestens Silizium und Sauerstoff und/oder Stickstoff enthält, auf dem lichtabschirmenden Film (3),wobei der Antireflexions-Film (6) einem Trockenätzen unter Verwendung von Fluor-Gas unterworfen werden kann und aus einem Material mit Widerstandseigenschaften in Bezug auf das Ätzen des Licht abschirmenden Films (3) hergestellt ist und der lichtabschirmende Film (3) aus einem auf Chrom basierenden Material oder einem auf Tantal basierenden Material hergestellt ist und einem Trockenätzen unterzogen werden kann unter Verwendung eines auf Chlor basierenden Gases.
Abstract:
A low reflective photomask blank suitable for shortened exposure wavelengths is disclosed. A photomask blank (1) having a single-layer or multilayer light-shielding film (3) arranged on a translucent substrate (2) and mainly containing a metal is characterized by comprising an antireflective film (6), which at least contains silicon and oxygen and/or nitrogen, on the light-shielding film (3).
Abstract:
The present invention is concerned with a phase-shift mask blank having a light semi-transmitting film which at least contains a transition metal selected from tungsten, tantalum, chromium or titanium, silicon and nitrogen on a transparent substrate, the light semi-transmitting film containing 5 to 70 at% of nitrogen, and an excellent phase-shift mask can be obtained by patterning the light semi-transmitting film of the phase-shift mask blank of the present invention since the light semi-transmitting film has a small surface roughness (nmRa).
Abstract:
A thermal treatment of a translucent film is carried out at a 15 deg C after forming the translucent film on a transparent substrate. The translucent film has a thin film of nitrogen, metal and silicon as main components. Independent claims are included for the following: (1) Photo mask manufacturing method; (2) Pattern transcription method; (3) Mask blank; (4) Photo mask; (5) Method of manufacturing half tone type phase shaft mask; and (6) Half tone type shift mask.
Abstract:
Half tone phase shift mask green body is produced by forming a transparent film which produces a predetermined extent of phase difference with respect to light passing directly through a transparent substrate and weakens the light intensity on the substrate. The transparent film contains silicon, palladium and one of nitrogen, oxygen or hydrogen.
Abstract:
PROBLEM TO BE SOLVED: To provide a low reflective photomask blank suitable for shortened exposure wavelength. SOLUTION: A photomask blank includes a single layer or multilayer light-shielding film 3, arranged on a translucent substrate 2 and mainly containing metals. The photomask blank is used for manufacturing a photomask which is to be subjected to exposure at a wavelength of not more than 200 nm. The photomask blank has an antireflection film 6, containing at least silicon and oxygen and/or nitrogen, on the light-shielding film 3; and the light-shielding film 3 is made of a material having etching durability, with respect to etching in the antireflection film 6. COPYRIGHT: (C)2009,JPO&INPIT