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    • 4. 发明申请
    • System and method for reducing disturbances caused by movement in an immersion lithography system
    • 用于减少浸没式光刻系统中运动引起的干扰的系统和方法
    • US20060044533A1
    • 2006-03-02
    • US10927394
    • 2004-08-27
    • Lev RyzhikovYuli Vladimirsky
    • Lev RyzhikovYuli Vladimirsky
    • G03B27/52
    • G03F7/70275G03F7/70258G03F7/70341G03F7/709
    • In an immersion lithography system, a moveable substrate unit is formed from a substrate and at least one optical element, with immersion liquid between them. The immersion liquid and the optical element move in unison with the substrate. Movement of the substrate unit reduces refractive index disturbance produced by turbulence during exposure scans. The projection optical system is enhanced with a dynamic axial compensation group. Elements in the dynamic axial compensation group can move to compensate aberrations caused by deviation of axial symmetry due to movement of the optical element in the substrate unit. The space in the substrate unit filled with immersion liquid may be dynamically controlled to provide proper working distance. If the optical element in the substrate unit has optical power, both resolution and depth of focus may be enhanced. Even if the optical element has no optical power, depth of focus may still be enhanced.
    • 在浸没式光刻系统中,可移动基板单元由基板和至少一个光学元件形成,其间具有浸没液体。 浸没液体和光学元件与基底一致地移动。 衬底单元的移动降低了曝光扫描期间由湍流产生的折射率干扰。 投影光学系统通过动态轴向补偿组增强。 动态轴向补偿组中的元件可以移动以补偿由于基板单元中的光学元件的移动引起的轴对称偏差引起的像差。 填充有浸没液体的基板单元中的空间可以被动态地控制以提供适当的工作距离。 如果基板单元中的光学元件具有光学功率,则可以提高分辨率和聚焦深度。 即使光学元件没有光学功率,仍然可以提高焦深。
    • 5. 发明授权
    • Ultra high resolution lithographic imaging and printing and defect reduction by exposure near the critical condition utilizing fresnel diffraction
    • 通过利用菲涅尔衍射在临界条件附近通过曝光进行超高分辨率光刻成像和印刷和缺陷减少
    • US06383697B1
    • 2002-05-07
    • US09514304
    • 2000-02-28
    • Yuli VladimirskyAntony Bourdillon
    • Yuli VladimirskyAntony Bourdillon
    • G03C500
    • G03F7/70216G03F7/70325G03F7/7035Y10S430/143Y10S430/168
    • Ultra-high resolution lithographic imaging and printing refers to the reduction in printed feature size, or “demagnification” obtained by the use of “bias”. A new meaning is given to Next Generation Lithography (NGL) in terms of fidelity in the reproduction of masks. Applying the classical manifestation of Fresnel diffraction, the mask pattern features are “demagnified” by “bias”. Classically, bias is minimized but the invention uses it to advantage so that: (i) mask-wafer gaps are thus enlarged; (ii) mask features are enlarged 3×-6× for a given printed feature size (cf. classically 1:1 in proximity lithography); (iii) the technique is extensible to beyond 25 nm feature sizes and (iv) exposure times are reduced. The invention is specifically demonstrated in proximity X-ray lithography but has a generic extension to all lithographies that can use out of focus imaging to produce ultra-high resolution. In consequence of the diffraction, printing defects due to mask faults are reduced including edge roughness, writing errors, diffraction effects at shielded areas and absorber thickness variations. Moreover the exposure doses from mask features of various sizes are controlled by various techniques.
    • 超高分辨率平版印刷成像和印刷是指通过使用“偏压”获得的印刷特征尺寸减小或“缩小”。 新一代平版印刷术(NGL)在面具复制方面的保真度有新意义。 应用菲涅耳衍射的经典表现,掩模图案特征通过“偏差”“缩小”。 通常,偏压被最小化,但是本发明使用它有利于:(i)掩模 - 晶片间隙因此被扩大; (ii)对于给定的印刷特征尺寸,掩模特征被放大3×6x(参见邻近光刻中的经典1:1); (iii)该技术可扩展到超过25nm的特征尺寸,并且(iv)降低曝光时间。 本发明在接近X射线光刻技术中被具体证明,但是具有可以使用离焦成像以产生超高分辨率的所有平版印刷术的通用扩展。 由于衍射,由于掩模故障引起的印刷缺陷减少,包括边缘粗糙度,写入误差,屏蔽区域的衍射效应和吸收体厚度变化。 此外,各种尺寸的掩模特征的曝光剂量由各种技术控制。
    • 6. 发明授权
    • Diffraction elements for alignment targets
    • 对准目标的衍射元件
    • US08681313B2
    • 2014-03-25
    • US12921559
    • 2009-04-03
    • Yuli VladimirskyMuhammad ArifRobert Albert Tharaldsen
    • Yuli VladimirskyMuhammad ArifRobert Albert Tharaldsen
    • G01B11/00G01B11/14G02B5/18G03B27/32G03B27/42G03B27/54G03B27/74
    • G03F9/7011G03F9/7076
    • A patterning device, including alignment targets having alignment features formed from a plurality of diffractive elements, each diffractive element including an absorber stack and a multi-layered reflector stack is provided. The diffractive elements are configured to enhance a pre-determined diffraction order used for pre-alignment and to diffract light in a pre-determined direction of a pre-alignment system when illuminated with light of a wavelength used for the pre-alignment. The diffractive elements may occupy at least half of an area of each alignment feature. The diffractive elements may be configured to enhance first or higher order diffractions, while substantially reducing zeroth diffraction orders and specular reflection when illuminated with a wavelength used for reticle prealignment. The dimensions of each diffractive element may be a function of a diffraction grating period of each alignment feature.
    • 一种图案形成装置,包括具有由多个衍射元件形成的对准特征的对准目标,每个衍射元件包括吸收体堆叠和多层反射器叠层。 衍射元件被配置为当用用于预对准的波长的光照射时,增强用于预对准的预定衍射级并且在预对准系统的预定方向上衍射光。 衍射元件可以占据每个对准特征的面积的至少一半。 衍射元件可以被配置为增强第一或更高阶衍射,同时当用用于掩模版预对准的波长照射时,基本上减少了零级衍射级和镜面反射。 每个衍射元件的尺寸可以是每个对准特征的衍射光栅周期的函数。
    • 7. 发明申请
    • Diffraction Elements for Alignment Targets
    • 对准目标的衍射元件
    • US20110019173A1
    • 2011-01-27
    • US12921559
    • 2009-04-03
    • Yuli VladimirskyMuhammah ArifRobert Albert Tharaldsen
    • Yuli VladimirskyMuhammah ArifRobert Albert Tharaldsen
    • G03B27/54G03B27/32G02B5/18
    • G03F9/7011G03F9/7076
    • A patterning device, including alignment targets having alignment features formed from a plurality of diffractive elements, each diffractive element including an absorber stack and a multi-layered reflector stack is provided. The diffractive elements are configured to enhance a pre-determined diffraction order used for pre-alignment and to diffract light in a pre-determined direction of a pre-alignment system when illuminated with light of a wavelength used for the pre-alignment. The diffractive elements may occupy at least half of an area of each alignment feature. The diffractive elements may be configured to enhance first or higher order diffractions, while substantially reducing zeroth diffraction orders and specular reflection when illuminated with a wavelength used for reticle prealignment. The dimensions of each diffractive element may be a function of a diffraction grating period of each alignment feature.
    • 一种图案形成装置,包括具有由多个衍射元件形成的对准特征的对准目标,每个衍射元件包括吸收体堆叠和多层反射器叠层。 衍射元件被配置为当用用于预对准的波长的光照射时,增强用于预对准的预定衍射级并且在预对准系统的预定方向上衍射光。 衍射元件可以占据每个对准特征的面积的至少一半。 衍射元件可以被配置为增强第一或更高阶衍射,同时当用用于掩模版预对准的波长照射时,基本上减少了零级衍射级和镜面反射。 每个衍射元件的尺寸可以是每个对准特征的衍射光栅周期的函数。
    • 9. 发明申请
    • Method and system for wavefront measurements of an optical system
    • 光学系统的波前测量方法和系统
    • US20090021748A1
    • 2009-01-22
    • US12178524
    • 2008-07-23
    • Azat M. LatypovSherman K. PoultneyYuli Vladimirsky
    • Azat M. LatypovSherman K. PoultneyYuli Vladimirsky
    • G01B9/02
    • G03F7/706G01J9/0215
    • A wavefront measurement system includes a source of electromagnetic radiation. An illumination system delivers the electromagnetic radiation to an object plane. A source of a diffraction pattern is in the object plane. A projection optical system projects the diffraction pattern onto an image plane, which includes a mechanism (e.g., a shearing grating) to introduce the lateral shear. A detector is located optically conjugate with the pupil of the projection optical system, and receives an instant fringe pattern, resulting from the interference between sheared wavefronts, from the image plane. The diffraction pattern is dynamically scanned across a pupil of the projection optical system, and the resulting time-integrated interferogram obtained from the detector is used to measure the wavefront aberration across the entire pupil.
    • 波前测量系统包括电磁辐射源。 照明系统将电磁辐射传送到物体平面。 衍射图案的来源在物体平面中。 投影光学系统将衍射图案投影到图像平面上,该图像平面包括用于引入横向剪切的机构(例如,剪切光栅)。 检测器与投影光学系统的光瞳光学共轭,并且从图像平面接收由剪切波前的干涉导致的即时条纹图案。 衍射图案被动态地扫描投影光学系统的光瞳,并且由检测器获得的所得到的时间积分干涉图用于测量整个瞳孔上的波前像差。