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    • 2. 发明授权
    • Faraday dose and uniformity monitor for plasma based ion implantation
    • 法拉第剂量和均匀度监测器用于等离子体离子注入
    • US07132672B2
    • 2006-11-07
    • US10817755
    • 2004-04-02
    • Steven R. WaltherRajesh DoraiHarold PersingJay ScheuerBon-Woong KooBjorn O. PedersenChris LeavittTimothy Miller
    • Steven R. WaltherRajesh DoraiHarold PersingJay ScheuerBon-Woong KooBjorn O. PedersenChris LeavittTimothy Miller
    • H01J37/244
    • H01J37/32963H01J37/32935H01J37/3299H01J2237/24405
    • A Faraday dose and uniformity monitor can include a magnetically suppressed annular Faraday cup surrounding a target wafer. A narrow aperture can reduce discharges within Faraday cup opening. The annular Faraday cup can have a continuous cross section to eliminate discharges due to breaks. A plurality of annular Faraday cups at different radii can independently measure current density to monitor changes in plasma uniformity. The magnetic suppression field can be configured to have a very rapid decrease in field strength with distance to minimize plasma and implant perturbations and can include both radial and azimuthal components, or primarily azimuthal components. The azimuthal field component can be generated by multiple vertically oriented magnets of alternating polarity, or by the use of a magnetic field coil. In addition, dose electronics can provide integration of pulsed current at high voltage, and can convert the integrated charge to a series of light pulses coupled optically to a dose controller.
    • 法拉第剂量和均匀性监测器可以包括围绕目标晶片的磁抑制环形法拉第杯。 狭窄的孔径可以减少法拉第杯开口内的排放。 环形法拉第杯可以具有连续的横截面,以消除由于断裂引起的排放。 多个不同半径的环形法拉第杯可以独立地测量电流密度以监测等离子体均匀性的变化。 磁场抑制场可以被配置为具有随着距离的场强非常快速的降低,以使等离子体和植入物扰动最小化,并且可以包括径向和方位角分量,或者主要包括方位角分量。 方位角分量可以由交替极性的多个垂直取向的磁体或通过使用磁场线圈来产生。 此外,剂量电子学可以提供高电压脉冲电流的集成,并且可以将积分电荷转换成光耦合到剂量控制器的一系列光脉冲。
    • 6. 发明申请
    • PLASMA UNIFORMITY SYSTEM AND METHOD
    • 等离子体均匀系统和方法
    • US20120000606A1
    • 2012-01-05
    • US12829497
    • 2010-07-02
    • Rajesh DoraiKamal HadidiMayur Jagtap
    • Rajesh DoraiKamal HadidiMayur Jagtap
    • C23F1/08C23C16/50H05B31/02C23C16/458
    • H01J37/32633H01J37/32412H01J37/32532
    • A plasma processing tool comprises a plasma chamber configured to generate a plasma from a gas introduced into the chamber where the generated plasma has an electron plasma frequency. A plurality of electrodes disposed within the chamber. Each of the electrodes configured to create a rapidly-rising-electric-field pulse in a portion of the plasma contained in the chamber. Each of said rapidly-rising-electric-field pulses having a rise time substantially equal to or less than the inverse of the electron plasma frequency and a duration of less than the inverse of the ion plasma frequency. In this manner, the electron energy distribution in the generated plasma may be spatially and locally modified thereby affecting the density, composition and temperature of the species in the plasma and consequently the uniformity of the density and composition of ions and neutrals directed at a target substrate.
    • 等离子体处理工具包括等离子体室,其被配置为从引入室中的气体产生等离子体,其中产生的等离子体具有电子等离子体频率。 设置在室内的多个电极。 每个电极被配置为在腔室中包含的等离子体的一部分中产生快速上升的电场脉冲。 所述快速上升电场脉冲中的每一个具有基本上等于或小于电子等离子体频率的倒数的上升时间和小于离子等离子体频率的倒数的持续时间。 以这种方式,所产生的等离子体中的电子能量分布可以在空间上和局部改变,从而影响等离子体中物质的密度,组成和温度,从而影响靶向靶基质的离子和中性粒子的密度和组成的均匀性 。