专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4486665A Negative ion source 失效
标题翻译：负离子源
公开(公告)号：US4486665A
公开(公告)日：1984-12-04
申请号：US405963
申请日：1982-08-06
申请人： Ka-Ngo Leung , Kenneth W. Ehlers
发明人： Ka-Ngo Leung , Kenneth W. Ehlers
IPC分类号： H01J37/08 , H01J3/04 , H01J27/02 , H01J27/14 , H05H1/22 , H01J27/00
CPC分类号： H01J27/028
摘要： An ionization vessel is divided into an ionizing zone and an extraction zone by a magnetic filter. The magnetic filter prevents high-energy electrons from crossing from the ionizing zone to the extraction zone. A small positive voltage impressed on a plasma grid, located adjacent an extraction grid, positively biases the plasma in the extraction zone to thereby prevent positive ions from migrating from the ionizing zone to the extraction zone. Low-energy electrons, which would ordinarily be dragged by the positive ions into the extraction zone, are thereby prevented from being present in the extraction zone and being extracted along with negative ions by the extraction grid. Additional electrons are suppressed from the output flux using ExB drift provided by permanent magnets and the extractor grid electrical field.
摘要翻译：电离容器通过磁性过滤器分为电离区和提取区。磁性过滤器防止高能电子从电离区域交叉到提取区域。施加在等离子体栅格上的小正电压位于提取栅格附近，对提取区中的等离子体进行正偏置，从而防止正离子从电离区迁移到提取区。因此，通常被正离子牵引到提取区中的低能电子被防止存在于萃取区中，并通过提取网格与负离子一起提取。使用由永磁体和提取器栅格电场提供的ExB漂移，从输出通量抑制附加电子。

2. 发明授权

US4447732A Ion source 失效
标题翻译：离子源
公开(公告)号：US4447732A
公开(公告)日：1984-05-08
申请号：US374847
申请日：1982-05-04
申请人： Ka-Ngo Leung , Kenneth W. Ehlers
发明人： Ka-Ngo Leung , Kenneth W. Ehlers
IPC分类号： H01J27/08 , H01J27/20
CPC分类号： H01J27/08
摘要： A magnetic filter for an ion source reduces the production of undesired ion species and improves the ion beam quality. High-energy ionizing electrons are confined by the magnetic filter to an ion source region, where the high-energy electrons ionize gas molecules. One embodiment of the magnetic filter uses permanent magnets oriented to establish a magnetic field transverse to the direction of travel of ions from the ion source region to the ion extraction region. In another embodiment, low energy 16 eV electrons are injected into the ion source to dissociate gas molecules and undesired ion species into desired ion species.
摘要翻译：用于离子源的磁性过滤器减少了不期望的离子种类的产生并提高了离子束质量。高能电离电子被磁性过滤器限制在离子源区域，高能电子使气体分子离子化。磁性过滤器的一个实施例使用定向成永久磁铁，以建立横向于从离子源区域到离子提取区域的离子行进方向的磁场。在另一个实施例中，将低能16eV电子注入到离子源中以将气体分子和不期望的离子物质分离成所需的离子物质。

3. 发明授权

US4725449A Method of making radio frequency ion source antenna 失效
标题翻译：制造射频离子源天线的方法
公开(公告)号：US4725449A
公开(公告)日：1988-02-16
申请号：US19999
申请日：1987-02-27
申请人： Kenneth W. Ehlers , Ka-Ngo Leung
发明人： Kenneth W. Ehlers , Ka-Ngo Leung
IPC分类号： C23D5/02 , H01Q1/36 , B05D3/14
CPC分类号： C23D5/02 , H01Q1/36
摘要： In the method, the radio frequency (RF) antenna is made by providing a clean coil made of copper tubing or other metal conductor, which is coated with a tacky organic binder, and then with a powdered glass frit, as by sprinkling the frit uniformly over the binder. The coil is then heated internally in an inert gas atmosphere, preferably by passing an electrical heating current along the coil. Initially, the coil is internally heated to about 200.degree. C. to boil off the water from the binder, and then to about 750.degree. C.-850.degree. C. to melt the glass frit, while also burning off the organic binder. The melted frit forms a molten glass coating on the metal coil, which is then cooled to solidify the glass, so that the metal coil is covered with a thin continuous homogeneous impervious glass coating of substantially uniform thickness. The glass coating affords complete electrical insulation and complete dielectric protection for the metal coil of the RF antenna, to withstand voltage breakdown and to prevent sputtering, while also doubling the plasma generating efficiency of the RF antenna, when energized with RF power in the vacuum chamber of an ion source for a particle accelerator or the like. The glass frit preferably contains apprxoimately 45% lead oxide.
摘要翻译：在该方法中，射频（RF）天线通过提供由铜管或其它金属导体制成的清洁线圈，其被涂覆有粘性有机粘合剂，然后用粉末状玻璃料，通过均匀地喷洒玻璃料在粘合剂上。然后将线圈在惰性气体气氛中内部加热，优选通过沿线圈传递电加热电流。最初，将线圈内部加热至约200℃，从粘合剂中蒸发掉水，然后升至约750℃-85℃，以熔化玻璃料，同时也燃烧有机粘合剂。熔化的玻璃料在金属线圈上形成熔融玻璃涂层，然后将其冷却以固化玻璃，使得金属线圈被覆有基本均匀厚度的薄的连续均匀不透性的玻璃涂层。玻璃涂层为RF天线的金属线圈提供完全的电绝缘和完整的绝缘保护，以承受电压击穿并防止溅射，同时在真空室中用RF功率激励时，RF天线的等离子体产生效率也将倍增的粒子加速器等的离子源。玻璃料优选含有最近45％的氧化铅。

4. 发明授权

US4559477A Three chamber negative ion source 失效
标题翻译：三室负离子源
公开(公告)号：US4559477A
公开(公告)日：1985-12-17
申请号：US550701
申请日：1983-11-10
申请人： Ka-Ngo Leung , Kenneth W. Ehlers , John R. Hiskes
发明人： Ka-Ngo Leung , Kenneth W. Ehlers , John R. Hiskes
IPC分类号： H01J27/02
CPC分类号： H01J27/028
摘要： A negative ion vessel is divided into an excitation chamber, a negative ionization chamber and an extraction chamber by two magnetic filters. Input means introduces neutral molecules into a first chamber where a first electron discharge means vibrationally excites the molecules which migrate to a second chamber. In the second chamber a second electron discharge means ionizes the molecules, producing negative ions which are extracted into or by a third chamber. A first magnetic filter prevents high energy electrons from entering the negative ionization chamber from the excitation chamber. A second magnetic filter prevents high energy electrons from entering the extraction chamber from the negative ionizing chamber. An extraction grid at the end of the negative ion vessel attracts negative ions into the third chamber and accelerates them. Another grid, located adjacent to the extraction grid, carries a small positive voltage in order to inhibit positive ions from migrating into the extraction chamber and contour the plasma potential. Additional electrons can be suppressed from the output flux using ExB forces provided by magnetic field means and the extractor grid electric potential.
摘要翻译：负离子容器通过两个磁性过滤器分为激发室，负离子化室和萃取室。输入装置将中性分子引入第一室，其中第一电子放电装置振动地激发迁移到第二室的分子。在第二室中，第二电子放电装置离子化分子，产生负离子，其被抽出到第三室中或由第三室抽出。第一磁性过滤器防止高能电子从激发室进入负电离室。第二磁性过滤器防止高能电子从负电离室进入提取室。在负离子容器末端的提取网格将负离子吸引到第三室中并加速它们。位于提取栅极附近的另一个栅极携带小的正电压，以便抑制正离子迁移到提取室中并且对等离子体电位进行轮廓。使用由磁场装置提供的ExB力和提取器栅极电势可以从输出通量抑制附加的电子。

5. 发明授权

US4793961A Method and source for producing a high concentration of positively charged molecular hydrogen or deuterium ions 失效
标题翻译：用于产生高浓度带正电荷的分子氢或氘离子的方法和来源
公开(公告)号：US4793961A
公开(公告)日：1988-12-27
申请号：US517476
申请日：1983-07-26
申请人： Kenneth W. Ehlers , Ka-Ngo Leung
发明人： Kenneth W. Ehlers , Ka-Ngo Leung
IPC分类号： H01J27/14 , G21B1/00 , H05H1/00
CPC分类号： H01J27/14
摘要： A high concentration of positive molecular ions of hydrogen or deuterium gas is extracted from a positive ion source having a short path length of extracted ions, relative to the mean free path of the gas molecules, to minimize the production of other ion species by collision between the positive ions and gas molecules. The ion source has arrays of permanent magnets to produce a multi-cusp magnetic field in regions remote from the plasma grid and the electron emitters, for largely confining the plasma to the space therebetween. The ion source has a chamber which is short in length, relative to its transverse dimensions, and the electron emitters are at an even shorter distance from the plasma grid, which contains one or more extraction apertures.
摘要翻译：相对于气体分子的平均自由程，从具有提取的离子的短路径长度的正离子源提取高浓度的氢或氘气的正分子离子，以通过相互之间的碰撞来最小化其它离子种类的产生正离子和气体分子。离子源具有永磁体阵列，以在远离等离子体栅格和电子发射体的区域中产生多尖点磁场，用于将等离子体大部分限制在其间的空间。离子源具有相对于其横向尺寸的长度短的室，并且电子发射体与包含一个或多个提取孔的等离子体格栅的距离更短。

6. 发明授权

US4760306A Electron emitting filaments for electron discharge devices 失效
标题翻译：用于电子放电装置的电子发射丝
公开(公告)号：US4760306A
公开(公告)日：1988-07-26
申请号：US503373
申请日：1983-06-10
申请人： Ka-Ngo Leung , Philip A. Pincosy , Kenneth W. Ehlers
发明人： Ka-Ngo Leung , Philip A. Pincosy , Kenneth W. Ehlers
IPC分类号： H01J1/15 , H01J9/04 , H01J19/08
CPC分类号： H01J9/04 , H01J1/15
摘要： Electrons are copiously emitted by a device comprising a loop-shaped filament made of lanthanum hexaboride. The filament is directly heated by an electrical current produced along the filament by a power supply connected to the terminal legs of the filament. To produce a filament, a diamond saw or the like is used to cut a slice from a bar made of lanthanum hexaboride. The diamond saw is then used to cut the slice into the shape of a loop which may be generally rectangular, U-shaped, hairpin-shaped, zigzag-shaped, or generally circular. The filaments provide high electron emission at a relatively low operating temperature, such as 1600.degree. C. To achieve uniform heating, the filament is formed with a cross section which is tapered between the opposite ends of the filament to compensate for non-uniform current distribution along the filament due to the emission of electrons from the filament.
摘要翻译：电子被包括由六硼化镧制成的环形灯丝的装置大量发射。通过连接到灯丝的端子腿的电源，沿着灯丝产生的电流直接加热灯丝。为了生产细丝，使用金刚石锯等来从六硼化镧棒制成切片。然后将金刚石锯切成切割成环形的形状，其可以是大致矩形的，U形的，发夹形的，之字形的或大致圆形的。长丝在相对较低的工作温度（例如1600℃）下提供高电子发射。为了均匀加热，灯丝形成有横截面，该横截面在灯丝的相对端之间是锥形的，以补偿不均匀的电流分布由于从灯丝发射电子而沿着灯丝。

7. 发明授权

US08279993B2 Gamma source for active interrogation 有权
标题翻译： Gamma来源用于主动询问
公开(公告)号：US08279993B2
公开(公告)日：2012-10-02
申请号：US12541423
申请日：2009-08-14
申请人： Ka-Ngo Leung , Tak Pui Lou , William A. Barletta
发明人： Ka-Ngo Leung , Tak Pui Lou , William A. Barletta
IPC分类号： G21G1/12
CPC分类号： H05G2/00 , G01V5/0091
摘要： A cylindrical gamma generator includes a coaxial RF-driven plasma ion source and target. A hydrogen plasma is produced by RF excitation in a cylindrical plasma ion generator using an RF antenna. A cylindrical gamma generating target is coaxial with the ion generator, separated by plasma and extraction electrodes which has many openings. The plasma generator emanates ions radially over 360° and the cylindrical target is thus irradiated by ions over its entire circumference. The plasma generator and target may be as long as desired.
摘要翻译：圆柱形γ发生器包括同轴RF驱动的等离子体离子源和靶。在使用RF天线的圆柱形等离子体离子发生器中通过RF激发产生氢等离子体。圆柱形伽马产生靶与离子发生器同轴，由具有许多开口的等离子体和引出电极分离。等离子体发生器径向离子发射离子360°，圆柱形靶因此在其整个圆周上被离子照射。等离子体发生器和靶可以是期望的长度。

8. 发明授权

US07342988B2 Neutron tubes 有权
公开(公告)号：US07342988B2
公开(公告)日：2008-03-11
申请号：US10360245
申请日：2003-02-06
申请人： Ka-Ngo Leung , Tak Pui Lou , Jani Reijonen
发明人： Ka-Ngo Leung , Tak Pui Lou , Jani Reijonen
IPC分类号： G21B1/00
CPC分类号： H05H3/06
摘要： A neutron tube or generator is based on a RF driven plasma ion source having a quartz or other chamber surrounded by an external RF antenna. A deuterium or mixed deuterium/tritium (or even just a tritium) plasma is generated in the chamber and D or D/T (or T) ions are extracted from the plasma. A neutron generating target is positioned so that the ion beam is incident thereon and loads the target. Incident ions cause D-D or D-T (or T-T) reactions which generate neutrons. Various embodiments differ primarily in size of the chamber and position and shape of the neutron generating target. Some neutron generators are small enough for implantation in the body. The target may be at the end of a catheter-like drift tube. The target may have a tapered or conical surface to increase target surface area.

9. 发明申请

US20050220244A1 Cylindrical neutron generator 有权
公开(公告)号：US20050220244A1
公开(公告)日：2005-10-06
申请号：US11110310
申请日：2005-04-19
申请人： Ka-Ngo Leung
发明人： Ka-Ngo Leung
IPC分类号： G21B3/00 , G21B1/00
CPC分类号： G21B3/00 , Y02E30/18
摘要： A cylindrical neutron generator is formed with a coaxial RF-driven plasma ion source and target. A deuterium (or deuterium and tritium) plasma is produced by RF excitation in a cylindrical plasma ion generator using an RF antenna. A cylindrical neutron generating target is coaxial with the ion generator, separated by plasma and extraction electrodes which contain many slots. The plasma generator emanates ions radially over 360° and the cylindrical target is thus irradiated by ions over its entire circumference. The plasma generator and target may be as long as desired. The plasma generator may be in the center and the neutron target on the outside, or the plasma generator may be on the outside and the target on the inside. In a nested configuration, several concentric targets and plasma generating regions are nested to increase the neutron flux.

10. 发明授权

US06924493B1 Ion beam lithography system 失效
标题翻译：离子束光刻系统
公开(公告)号：US06924493B1
公开(公告)日：2005-08-02
申请号：US09641467
申请日：2000-08-17
申请人： Ka-Ngo Leung
发明人： Ka-Ngo Leung
IPC分类号： H01J37/302 , H01J37/317
CPC分类号： H01J37/3174 , B82Y10/00 , B82Y40/00 , H01J37/045 , H01J37/08 , H01J2237/0435 , H01J2237/1205 , H01J2237/21 , H01J2237/3175 , H01J2237/31755 , H01J2237/31774 , H01J2237/31788
摘要： A maskless plasma-formed ion beam lithography tool provides for patterning of sub-50 nm features on large area flat or curved substrate surfaces. The system is very compact and does not require an accelerator column and electrostatic beam scanning components. The patterns are formed by switching beamlets on or off from a two electrode blanking system with the substrate being scanned mechanically in one dimension. This arrangement can provide a maskless nano-beam lithography tool for economic and high throughput processing.
摘要翻译：无掩模等离子体形成的离子束光刻工具提供了在大面积平坦或弯曲的衬底表面上的50nm以下特征的图案化。该系统非常紧凑，不需要加速器柱和静电束扫描组件。通过在两个电极消隐系统中切换子束来形成图案，其中衬底在一个维度上被机械地扫描。这种布置可以提供用于经济和高通量处理的无掩模纳米光刻工具。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式