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    • 5. 发明授权
    • Aberration-corrected and energy-filtered low energy electron microscope with monochromatic dual beam illumination
    • US08729466B1
    • 2014-05-20
    • US13804066
    • 2013-03-14
    • Marian Mankos
    • Marian Mankos
    • H01J37/05G01N23/225H01J37/29H01J37/153
    • H01J37/026H01J37/04H01J37/285H01J37/29H01J2237/0042H01J2237/0044H01J2237/0492H01J2237/05H01J2237/1534H01J2237/2538
    • One embodiment relates to an apparatus for correcting aberrations introduced when an electron lens forms an image of a specimen and simultaneously forming an electron image using electrons with a narrow range of electron energies from an electron beam with a wide range of energies. A first electron beam source is configured to generate a lower energy electron beam, and a second electron beam source is configured to generate a higher energy electron beam. The higher energy beam is passed through a monochromator comprising an energy-dispersive beam separator, an electron mirror and a knife-edge plate that removes both the high and low energy tail from the propagating beam. Both the lower and higher energy electron beams are deflected by an energy-dispersive beam separator towards the specimen and form overlapping illuminating electron beams. An objective lens accelerates the electrons emitted or scattered by the sample. The electron beam leaving the specimen is deflected towards a first electron mirror by an energy-dispersive beam separator, which introduces an angular dispersion that disperses the electron beam according to its energy. A knife-edge plate, located between the beam separator and first electron mirror, is inserted that removes all of the beam with energy larger and smaller than a selected energy and filters the beam according to energy. One or more electron lenses focus the electron beam at the reflection surface of the first electron mirror so that after the reflection and another deflection by the same energy-dispersive beam separator the electron beam dispersion is removed. The dispersion-free and energy-filtered electron beam is then reflected in a second electron mirror which corrects one or more aberrations of the objective lens. After the second reflection, electrons are deflected by the magnetic beam separator towards the projection optics which forms a magnified, aberration-corrected, energy-filtered image on a viewing screen.
    • 7. 发明申请
    • Electron confinement inside magent of ion implanter
    • 离子注入机内部的电子限制
    • US20060169911A1
    • 2006-08-03
    • US11272193
    • 2005-11-10
    • Anthony RenauJoseph OlsonShengwu ChangJames Buff
    • Anthony RenauJoseph OlsonShengwu ChangJames Buff
    • H01J1/50
    • H01J37/1475H01J37/026H01J37/3171H01J2237/0041H01J2237/0042H01J2237/055
    • A method and apparatus are disclosed for improving space charge neutralization adjacent a magnet of an ion implanter by confining the electrons inside a magnetic region thereof to reduce electron losses and therefore improve the transport efficiency of a low energy beam. A magnetic pole member for a magnet of an ion implanter is provided that includes an outer surface having a plurality of magnetic field concentration members that form magnetic field concentrations adjacent the magnetic pole member. Electrons that encounter this increased magnetic field are repelled back along the same magnetic field line rather than allowed to escape. An analyzer magnet and ion implanter including the magnet pole are also provided so that a method of improving low energy ion beam space charge neutralization in an ion implanter is realized.
    • 公开了一种用于通过将电子限制在其磁性区域内以减少电子损失并因此提高低能量束的传输效率来改进邻近离子注入机的磁体的空间电荷中和的方法和装置。 提供了一种用于离子注入机的磁体的磁极构件,其包括具有与磁极构件相邻形成磁场浓度的多个磁场浓度构件的外表面。 遇到这种增加的磁场的电子沿着相同的磁场线被击退,而不是允许逃逸。 还提供了包括磁极的分析器磁体和离子注入机,从而实现了在离子注入机中提高低能量离子束空间电荷中和的方法。