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    • 30. 发明申请
    • System and method for evaluation using electron beam and manufacture of devices
    • 使用电子束进行评估的系统和方法以及器件的制造
    • US20060060790A1
    • 2006-03-23
    • US10998160
    • 2004-11-29
    • Mamoru NakasujiTohru SatakeTakao KatoNobuharu Noji
    • Mamoru NakasujiTohru SatakeTakao KatoNobuharu Noji
    • H01J1/50H01T23/00
    • H01J37/141B82Y10/00B82Y15/00H01J37/09H01J37/12H01J37/1474H01J37/28H01J2237/0453H01J2237/06316H01J2237/244H01J2237/2538H01J2237/2817
    • An electron beam apparatus having a longer life time of cathode, and allowing a plurality of electron beams to be arranged adequately around an optical axis and five or more electron beams to be formed from a single electron gun. The electron beams emitted from a cathode made of ZrO/W (tungsten zirconium oxide) or a cathode made of carbide of transition metal to the off-optical axis directions may be converged on a sample to scan it. The apparatus includes a plate for reducing a vacuum conductance defined between the electron gun chamber side and the sample side, and apertures are formed through the plate at locations offset from the optical axis allowing for the passage of the electron beams. In order to evaluate a pattern on the sample, the electron beam emitted from the electron gun is incident to the sample surface via an objective lens. The objective lens is composed of a flat electrode having an aperture centered on the optical axis and placed in parallel with the sample surface and an electromagnetic lens including a gap formed in a side facing to the sample. Further, in order to inspect a mask, spacing among a plurality of electron beams after having passed through the mask are extended by a magnifying lens and thus widely spaced electron beams are then converted into optical signal in a scintillator.
    • 一种电子束装置,具有较长的阴极使用寿命,并允许多个电子束在光轴周围适当布置,并可由单个电子枪形成五个或更多个电子束。 从由ZrO / W(钨氧化锆)制成的阴极或由过渡金属的碳化物制成的阴极发射到离轴方向的电子束可以会聚在样品上以进行扫描。 该装置包括用于减小限定在电子枪室侧和样品侧之间的真空电导的板,并且在偏离光轴的位置处穿过板形成允许电子束通过的孔。 为了评估样品上的图案,从电子枪发射的电子束通过物镜入射到样品表面。 物镜由平面电极构成,该平面电极具有以光轴为中心并且与样品表面平行放置的孔,以及包括在面向样品的一侧形成的间隙的电磁透镜。 此外,为了检查掩模,在通过掩模之后的多个电子束之间的间隔通过放大透镜延伸,并且因此在闪烁体中将大量间隔的电子束转换成光信号。