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    • 6. 发明申请
    • MASK BLANK AND TRANSFER MASK
    • 遮罩和转印面罩
    • US20120100466A1
    • 2012-04-26
    • US13260295
    • 2010-03-30
    • Masahiro HashimotoHiroyuki IwashitaYasushi OkuboOsamu Nozawa
    • Masahiro HashimotoHiroyuki IwashitaYasushi OkuboOsamu Nozawa
    • G03F1/46G03F1/50B82Y30/00
    • G03F1/46G03F1/50G03F1/58
    • A mask blank and transfer mask that overcomes problems caused by an electromagnetic field (EMF) effect when the DRAM half pitch (hp) specified in semiconductor device design specifications is 32 nm or less. The mask blank is used in manufacturing a transfer mask to which ArF exposure light is applied, and includes a light shielding film 10 having a multilayer structure. The multilayer structure includes a light shielding layer 11 and a surface anti-reflection layer 12 formed on a transparent substrate 1. An auxiliary light shielding film 20 is formed on the light shielding film 10. The light shielding film 10 has a thickness of 40 nm or less and an optical density of 2.0 or more to 2.7 or less for exposure light. The optical density for exposure light in the multilayer structure of the light shielding film 10 and the auxiliary light shielding film 20 is 2.8 or more.
    • 当在半导体器件设计规范中规定的DRAM半间距(hp)为32nm以下时,能够克服由电磁场(EMF)效应引起的问题的掩模空白和传送掩模。 掩模坯料用于制造施加ArF曝光光的转印掩模,并且包括具有多层结构的遮光膜10。 多层结构包括形成在透明基板1上的遮光层11和表面防反射层12.在遮光膜10上形成辅助遮光膜20.遮光膜10的厚度为40nm 曝光光的光密度为2.0以上且2.7以下。 遮光膜10和辅助遮光膜20的多层结构中的曝光光的光密度为2.8以上。
    • 9. 发明申请
    • PHASE SHIFT MASK BLANK AND PHASE SHIFT MASK
    • 相移屏蔽层和相位移屏蔽
    • US20110111332A1
    • 2011-05-12
    • US13001365
    • 2009-06-25
    • Hiroyuki IwashitaHiroaki ShishidoAtsushi KominatoMasahiro Hashimoto
    • Hiroyuki IwashitaHiroaki ShishidoAtsushi KominatoMasahiro Hashimoto
    • G03F1/00
    • G03F1/58G03F1/32
    • The present invention provides a photomask blank used for producing a photomask to which an ArF excimer laser light is applied, wherein: a light-shielding film is provided on a light transmissive substrate; the light-shielding film has a laminated structure in which a lower layer, an interlayer and an upper layer are laminated in this order from the side close to the light transmissive substrate; the thickness of the entire light-shielding film is 60 nm or less; the lower layer is made of a film containing a metal and has a first etching rate; the upper layer is made of a film containing a metal and has a third etching rate; the interlayer is made of a film containing the same metal as that contained in the lower layer or the upper layer and has a second etching rate that is lower than the first etching rate and the third etching rate; and the thickness of the interlayer is 30% or less of the thickness of the entire light-shielding film.
    • 本发明提供一种用于制造施加了ArF准分子激光的光掩模的光掩模坯料,其中:在透光基板上设置有遮光膜; 遮光膜具有层叠结构,其中从靠近透光基底的一侧依次层叠下层,中间层和上层; 整个遮光膜的厚度为60nm以下; 下层由含有金属的膜制成,具有第一蚀刻速率; 上层由含有金属的膜制成,具有第三蚀刻速率; 中间层由含有与下层或上层相同的金属的膜制成,具有比第一蚀刻速度和第三蚀刻速度低的第二蚀刻速率; 并且中间层的厚度为整个遮光膜的厚度的30%以下。
    • 10. 发明授权
    • Phase shift mask blank, phase shift mask, and method for manufacturing phase shift mask blank
    • 相移掩模空白,相移掩模和用于制造相移掩模空白的方法
    • US07935461B2
    • 2011-05-03
    • US12489866
    • 2009-06-23
    • Osamu NozawaMasahiro Hashimoto
    • Osamu NozawaMasahiro Hashimoto
    • G03F1/00
    • G03F1/32G03F1/54
    • Problem: There is a demand for a phase shift mask that makes it possible to decrease the film thickness of the phase shift film, can satisfy the requirement relating to pattern accuracy, without collapsing the OPC pattern, and enables control of optical characteristics and pattern defect inspection, and also for a phase shift mask blank as an original plate for such a phase shift mask.Means for Solving the Problems: A phase shift mask blank of the present invention has, on a transparent substrate, a phase shift film including, as main components, a metal, silicon (Si) and nitrogen (N), having optical characteristics of a transmittance of equal to or greater than 9% and equal to or less than 30% with respect to a wavelength of the ArF excimer laser beam and a phase difference of equal to or greater than 150° and less than 180°, and a light-shielding film formed on the phase shift film. A thickness of the phase shift film is equal to or less than 80 nm, and a refractive index (n) with respect to the wavelength of the ArF excimer laser beam is equal to or greater than 2.3, and an extinction coefficient (k) is equal to or greater than 0.28.
    • 问题:需要可以降低相移膜的膜厚的相移掩模,可以满足与图案精度有关的要求,而不会使OPC图案折叠,并且能够控制光学特性和图案缺陷 检查,以及用于这种相移掩模的相移掩模坯料作为原始板。 解决问题的手段本发明的相移掩模坯料在透明基板上具有包括金属,硅(Si)和氮(N)作为主要成分的相移膜,其具有光学特性为 透射率相对于ArF准分子激光的波长等于或大于9%且等于或小于30%,相位差等于或大于150°且小于180°, 形成在相移膜上的屏蔽膜。 相移膜的厚度等于或小于80nm,并且相对于ArF准分子激光束的波长的折射率(n)等于或大于2.3,消光系数(k)为 等于或大于0.28。