High-permeability magnetic shield for improved process uniformity in nonmagnetized plasma process chambers
    51.
    发明授权
    High-permeability magnetic shield for improved process uniformity in nonmagnetized plasma process chambers 有权
    高磁导率磁屏蔽,用于改善非磁化等离子体处理室中的工艺均匀性

    公开(公告)号:US06447651B1

    公开(公告)日:2002-09-10

    申请号:US09800798

    申请日:2001-03-07

    IPC分类号: C23C1435

    摘要: A method and apparatus for forming a layer on a substrate in a process chamber during a plasma deposition process are provided. A plasma is formed in a process chamber, a process gas with precursor gases suitable for depositing the layer are flowed into the process chamber, and a magnetic field having a strength less than about 0.5 gauss is attenuated within the process chamber. Attenuation of such a magnetic field results in an improvement in the degree of process uniformity achieved during the deposition.

    摘要翻译: 提供了一种用于在等离子体沉积工艺期间在处理室中在衬底上形成层的方法和装置。 在处理室中形成等离子体,具有适于沉积层的前体气体的工艺气体流入处理室,并且具有小于约0.5高斯的强度的磁场在处理室内衰减。 这种磁场的衰减导致在沉积期间实现的工艺均匀度的改善。

    Gas distribution in deposition chambers
    56.
    发明授权
    Gas distribution in deposition chambers 有权
    沉积室中的气体分布

    公开(公告)号:US06251187B1

    公开(公告)日:2001-06-26

    申请号:US09433086

    申请日:1999-11-03

    IPC分类号: C23C1600

    摘要: An improved deposition chamber (2) includes a housing (4) defining a vacuum chamber (18) which houses a substrate support (14). A set of first nozzles (34) have orifices (38) opening into the vacuum chamber in a circumferential pattern spaced apart from and generally overlying the periphery (40) of the substrate support. One or more seconds nozzle (56, 56a), positioned centrally above the substrate support, inject process gases into the vacuum chamber to improve deposition thickness uniformity. Deposition thickness uniformity is also improved by ensuring that the process gases are supplied to the first nozzles at the same pressure. If needed, enhanced cleaning of the nozzles can be achieved by slowly drawing a cleaning gas from within the vacuum chamber in a reverse flow direction through the nozzles using a vacuum pump (84).

    摘要翻译: 改进的沉积室(2)包括限定容纳衬底支撑件(14)的真空室(18)的壳体(4)。 一组第一喷嘴(34)具有以与基板支撑件的周边(40)间隔开并且通常覆盖基板支撑件的周边(40)的圆周图案而开口进入真空室的孔口(38)。 位于基板支架上方中心的一个或多个秒喷嘴(56,56a)将工艺气体注入真空室以改善沉积厚度均匀性。 通过确保将工艺气体以相同的压力供应到第一喷嘴,也提高了沉积厚度均匀性。 如果需要,可以通过使用真空泵(84)通过喷嘴沿反向流动方向从真空室内缓慢地抽取清洁气体来实现喷嘴的增强清洁。

    Plasma source for HDP-CVD chamber
    58.
    发明授权

    公开(公告)号:US5800621A

    公开(公告)日:1998-09-01

    申请号:US795169

    申请日:1997-02-10

    摘要: A plasma system is disclosed for processing a substrate and includes a chamber body defining a plasma cavity therein and having a centrally located gas inlet, and a top antenna configured in position relative to the plasma cavity to produce a center-peaked plasma density profile above the substrate during operation. The top antenna has a central passage which surrounds the centrally located gas inlet. A side antenna is preferably configured and positioned relative to the plasma chamber to produce a hollow-center plasma density profile above the substrate during operation. Together, the top and side antennas and the centrally located gas inlet provide a uniform plasma directly over the surface of the substrate to be processed.

    Stepping motor control method including varying the number of split
sections in one step drive period of a stepping motor
    59.
    发明授权
    Stepping motor control method including varying the number of split sections in one step drive period of a stepping motor 失效
    步进电机控制方法,包括在步进电机的一个步进驱动周期内改变分段数

    公开(公告)号:US5572105A

    公开(公告)日:1996-11-05

    申请号:US363012

    申请日:1994-12-23

    CPC分类号: H02P8/32 H02P8/22

    摘要: A device for controlling the power supplied to windings of a stepping motor includes a pulse generator for splitting one step drive period of the motor into a plurality of sections, the number of sections and increasing or decreasing depending upon the drive frequency. The pulse generator, also sets the duty cycle of a pulse applied to the motor. The device also includes a stepping motor drive circuit for exciting each phase of the motor with a current determined by the duty cycle of pulse, and a duty changing device for changing the duty cycle for each of plural sections in one excitation phase of the stepping motor, wherein a current wave input into the motor can be maintained as a sinusoidal wave from low-speed rotation to high-speed rotation of the motor by changing the number of sections in excitation depending upon serial drive operations, thereby achieving motor control with less rotation inconsistencies and less noise.

    摘要翻译: 用于控制提供给步进电机的绕组的功率的装置包括:脉冲发生器,用于将电动机的一个驱动周期分为多个部分,根据驱动频率分段数量增加或减小。 脉冲发生器还设置施加到电机的脉冲的占空比。 该装置还包括步进电动机驱动电路,用于以由脉冲的占空比确定的电流来激励电动机的每相,以及用于改变步进电动机的一个励磁相中的多个部分中的每一个的占空比的占空比变更装置 ,其中输入到电动机的电流波可以通过根据串行驱动操作改变激励部分的数量,将其保持为从低速旋转到电动机的高速旋转的正弦波,从而以较少的旋转实现电动机控制 不一致和噪音较小。