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    • 3. 发明授权
    • System and method for current-based plasma excursion detection
    • 基于电流等离子体偏移检测的系统和方法
    • US08587321B2
    • 2013-11-19
    • US12890089
    • 2010-09-24
    • Jian J. ChenMohamad A. Ayoub
    • Jian J. ChenMohamad A. Ayoub
    • G01R31/14
    • H01J37/32935H01J37/32183
    • A system and method for the detection of plasma excursions, such as arcs, micro-arcs, or other plasma instability, during plasma processing by directly monitoring RF current just prior to reaching an RF power electrode of a plasma processing chamber is provided. The monitored RF current may be converted to an RF voltage and then passed through a succession of analog filters and amplifiers to provide a plasma excursion signal. The plasma excursion signal is compared to a preset value, and at points where the plasma excursion signal exceeds the preset value, an alarm signal is generated. The alarm signal is then fed back into a system controller so that an operator can be alerted and/or the processing system can be shut down. In one embodiment, the RF current amplified and converted to a digital signal for digital filtering and processing. In certain embodiments, multiple processing regions can be monitored by a single detection control unit.
    • 提供了一种用于在等离子体处理期间通过在到达等离子体处理室的RF功率电极之前直接监视RF电流来检测诸如电弧,微弧或其他等离子体不稳定性的等离子体偏移的系统和方法。 监控的RF电流可以转换成RF电压,然后通过一系列模拟滤波器和放大器,以提供等离子体偏移信号。 将等离子体偏移信号与预设值进行比较,并且在等离子体偏移信号超过预设值的点处,产生报警信号。 然后将报警信号反馈回系统控制器,以便可以警告操作员和/或处理系统被关闭。 在一个实施例中,RF电流被放大并转换成用于数字滤波和处理的数字信号。 在某些实施例中,多个处理区域可以由单个检测控制单元监视。
    • 4. 发明申请
    • SYSTEM AND METHOD FOR CURRENT-BASED PLASMA EXCURSION DETECTION
    • 基于电流等离子体检测的系统和方法
    • US20120074951A1
    • 2012-03-29
    • US12890089
    • 2010-09-24
    • Jian J. ChenMohamad A. Ayoub
    • Jian J. ChenMohamad A. Ayoub
    • G01R31/14
    • H01J37/32935H01J37/32183
    • A system and method for the detection of plasma excursions, such as arcs, micro-arcs, or other plasma instability, during plasma processing by directly monitoring RF current just prior to reaching an RF power electrode of a plasma processing chamber is provided. The monitored RF current may be converted to an RF voltage and then passed through a succession of analog filters and amplifiers to provide a plasma excursion signal. The plasma excursion signal is compared to a preset value, and at points where the plasma excursion signal exceeds the preset value, an alarm signal is generated. The alarm signal is then fed back into a system controller so that an operator can be alerted and/or the processing system can be shut down. In one embodiment, the RF current amplified and converted to a digital signal for digital filtering and processing. In certain embodiments, multiple processing regions can be monitored by a single detection control unit.
    • 提供了一种用于在等离子体处理期间通过在到达等离子体处理室的RF功率电极之前直接监视RF电流来检测诸如电弧,微弧或其他等离子体不稳定性的等离子体偏移的系统和方法。 监控的RF电流可以转换成RF电压,然后通过一系列模拟滤波器和放大器,以提供等离子体偏移信号。 将等离子体偏移信号与预设值进行比较,并且在等离子体偏移信号超过预设值的点处,产生报警信号。 然后将报警信号反馈回系统控制器,以便可以警告操作员和/或处理系统被关闭。 在一个实施例中,RF电流被放大并转换成用于数字滤波和处理的数字信号。 在某些实施例中,多个处理区域可以由单个检测控制单元监视。