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    • 5. 发明授权
    • Defect inspection system
    • 缺陷检查系统
    • US08319960B2
    • 2012-11-27
    • US12770337
    • 2010-04-29
    • Kenji AikoShuichi ChikamatsuMinori NoguchiHisafumi Iwata
    • Kenji AikoShuichi ChikamatsuMinori NoguchiHisafumi Iwata
    • G01N21/88
    • H04N7/18G01N21/9501G01N21/956G01N2021/8822H01L22/12H01L2924/0002H01L2924/00
    • A defect inspection system can suppress an effect of light from a sample rough surface or a regular circuit pattern and increasing a gain of light from a defect such as a foreign material to detect the defect on the sample surface with high sensitivity. When a lens with a large NA value is used, the outer diameter of the lens is 10a, and an angle between the sample surface and a traveling direction of the light from a defect is α1. An oblique detection optics system receives the light from the defect at a reduced elevation angle α2 with respect to the sample surface to reduce light from the sample rough surface, an oxide film rough bottom surface, and a circuit pattern, and to increase the amount of the light from the defect and detected. The diameter 10a of a lens is smaller than the diameter 10b, resulting in a reduction in the ability to focus the scattered light. When a lens with an outer diameter 10c is used to improve the focus ability, the lens interferes with the sample. To avoid the interference, a portion of the lens interfering with the sample is removed. The lens has an aperture larger than the diameter 10b while the lens receives the light scattered at the elevation angle α2, making it possible to improve the ability to detect defects and lens performance simultaneously.
    • 缺陷检查系统可以抑制来自样品粗糙表面或常规电路图案的光的影响,并且增加来自诸如异物的缺陷的光的增益以高灵敏度检测样品表面上的缺陷。 当使用具有大NA值的透镜时,透镜的外径为10a,并且样品表面与来自缺陷的光的行进方向之间的角度为α1。 倾斜检测光学系统以相对于样品表面的降低的仰角α2接收来自缺陷的光,以减少来自样品粗糙表面,氧化膜粗糙底表面和电路图案的光,并且增加 来自缺陷的光并检测。 透镜的直径10a小于直径10b,导致散射光聚焦的能力降低。 当使用外径为10c的透镜来提高聚焦能力时,透镜会干扰样品。 为了避免干扰,去除了与样品干扰的一部分透镜。 透镜具有大于直径10b的孔径,而透镜接收以仰角α2散射的光,从而可以提高同时检测缺陷和透镜性能的能力。
    • 6. 发明授权
    • Method and apparatus for detecting defects
    • 检测缺陷的方法和装置
    • US07426023B2
    • 2008-09-16
    • US11296290
    • 2005-12-08
    • Yoshimasa OhshimaHisafumi IwataHiroyuki Nakano
    • Yoshimasa OhshimaHisafumi IwataHiroyuki Nakano
    • G01N21/00
    • G01N21/47G01N21/21G01N21/94G01N21/9501G01N2021/8825
    • There is disclosed a defect detecting apparatus that focuses a laser beam, irradiates it onto the surface of a sample to be examined, and detects a foreign substance/defect existing on the surface from the scattered light as a result of the irradiation of the beam onto the sample surface. In order to stably detect defects such as foreign substance, the defect detecting apparatus according to the invention is constructed to use a beam shape optical system by which the laser beam emitted from a laser source is shaped to change the illumination intensity from its Gauss distribution to a flat distribution so that the detected signal can be stably produced even if the relative position of a defect/foreign substance to the laser beam irradiation position is changed.
    • 公开了一种将激光束聚焦并将其照射到待检查样品的表面上的缺陷检测装置,并且由于将光束照射到散射光上而检测存在于表面上的异物/缺陷 样品表面。 为了稳定地检测异物等缺陷,根据本发明的缺陷检测装置的结构是使用光束形状光学系统,通过该光束系统将从激光源发射的激光束成形为将照射强度从其高斯分布改变为 平坦分布,使得即使改变了缺陷/异物与激光束照射位置的相对位置,也能够稳定地产生检测信号。
    • 10. 发明授权
    • Method and apparatus for the inspection of defects
    • 用于检查缺陷的方法和装置
    • US5293538A
    • 1994-03-08
    • US705537
    • 1991-05-24
    • Hisafumi IwataYukio MatsuyamaHitoshi Kubota
    • Hisafumi IwataYukio MatsuyamaHitoshi Kubota
    • G01N21/88G01N21/95G01N21/956G01N21/47
    • G01N21/8806G01N21/956G01N2021/8427G01N2021/8825
    • A defect inspection method and apparatus detect a defect which exists on the surface of a protection layer or a defect which exists in the protection layer and scatters the light on its surface, through the detection of the light which is derived from an illumination light and reflected on the protection layer surface and the light which is derived from a slit-formed illumination light and scattered in the area between the position where the light is incident to the transparent protection layer and the position where the surface of an element underneath the transparent protection layer is illuminated. An image process, which images two elements having the same appearance and compares the images, thereby to reduce inconsistent components emerging in portions other than a defective portion, is conducted through imaging under the bright field illumination and bright/dark field combined illumination, and the images are rendered the minimum filtering process based on 3-by-3 pixels and the defect judgement process based on comparison.
    • 缺陷检查方法和装置通过检测从照明光导出的光并检测出存在于保护层的表面上的缺陷或者存在于保护层中的缺陷并将光散射在其表面上 在保护层表面上和由狭缝形成的照明光导出并散射在光入射到透明保护层的位置和透明保护层下面的元件表面之间的区域中的光 被照亮。 一种图像处理,其对具有相同外观的两个元件进行图像比较,从而减少在缺陷部分以外的部分中出现的不一致的成分,通过在明场照明和亮/暗场组合照明下的成像进行,并且 基于3×3像素的图像被渲染为最小滤波处理,并且基于比较的缺陷判断处理。