WO2018061617A1 - 高周波電源装置 - Google Patents
高周波電源装置 Download PDFInfo
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- WO2018061617A1 WO2018061617A1 PCT/JP2017/031597 JP2017031597W WO2018061617A1 WO 2018061617 A1 WO2018061617 A1 WO 2018061617A1 JP 2017031597 W JP2017031597 W JP 2017031597W WO 2018061617 A1 WO2018061617 A1 WO 2018061617A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32137—Radio frequency generated discharge controlling of the discharge by modulation of energy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32137—Radio frequency generated discharge controlling of the discharge by modulation of energy
- H01J37/32146—Amplitude modulation, includes pulsing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32174—Circuits specially adapted for controlling the RF discharge
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/80—Generating trains of sinusoidal oscillations
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/02—Shaping pulses by amplifying
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/156—Arrangements in which a continuous pulse train is transformed into a train having a desired pattern
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
Definitions
- the present disclosure relates to a high frequency power supply device, and can be applied to, for example, a pulse modulation type high frequency power supply device.
- High-frequency power supply devices are used as industrial equipment that supplies high-frequency energy to a load device such as plasma or laser and performs surface treatment or processing using the generated plasma or laser or the like (for example, JP 2014-175218).
- the output level of the high-frequency power supply device may fluctuate due to the load impedance, resulting in excessive output.
- the subject of this indication is providing the high frequency power supply device which reduces the fluctuation
- the high-frequency power supply device modulates the oscillation circuit that outputs a high-frequency signal having a predetermined frequency and the high-frequency signal output from the circuit into a pulse shape that repeats an ON state and an OFF state, and outputs the pulse-like high-frequency signal.
- An output power detection unit that detects an output power value of pulsed high-frequency power output from the amplification circuit, and a maximum output power value of a leading portion of a pulse detected by the output power detection unit A corresponding first voltage value is input, and based on the input first voltage value and a preset voltage value set in advance as a voltage value corresponding to output power,
- a first comparison operation circuit that outputs a first level control signal for controlling a level of a pulsed high-frequency signal adjusted by a variable attenuation circuit; and an average level of the latter half portion of the pulse detected by the output power detection unit
- the second voltage value corresponding to the output power value is input, and the level of the pulsed high frequency signal adjusted by the variable attenuation
- a second comparison operation circuit for outputting a two-level control signal; a switching circuit for switching the values of the first level control signal and the second level control signal according to a switching timing set value; and the first level control signal Or a time constant circuit for setting a transition time when the second level control signal is updated to a desired time constant.
- FIG. 1 Schematic configuration diagram of a pulse modulation type high frequency power supply device according to a comparative example
- FIG. 1 is a flowchart of the processing of the comparison operation circuit.
- High-frequency output level and variable attenuation circuit control voltage timing diagram The figure which shows the example of the high frequency output waveform at the time of connecting a high frequency power supply device to load devices, such as a laser
- FIG. 4 is a flowchart of the two-stage level control circuit. Waveform diagram of high-frequency output with dents High-frequency output waveform diagram showing an example where level control at the first stage is not possible
- FIG. 1 is a schematic configuration diagram of a pulse modulation type high frequency power supply device according to a comparative example.
- a pulse modulation type high frequency power supply device according to a comparative example includes an oscillation circuit (001), a high frequency switch (002), a variable attenuation circuit (003), an amplification circuit (004), and a directional coupler (005). And a level control circuit (000).
- the level control circuit (000) includes a detection circuit (006), an AD conversion circuit (007), a comparison operation circuit (008), and a DA conversion circuit (009).
- Oscillation circuit (001) is a circuit that outputs a sine wave at a fixed level for the source oscillation of the output frequency of the high frequency power supply device. That is, a high frequency signal having a predetermined frequency is output.
- the high frequency switch (002) which is a modulation unit is a switch which is turned on / off in response to a pulse modulation signal from the outside or the inside, and the high frequency output signal from the oscillation circuit (001) is repeatedly turned on and off by this switch. Modulates in a pulse form and outputs it as a pulsed high frequency signal.
- the ON state is a state where a high frequency signal is output
- the OFF state is a state where a high frequency signal is not output. That is, the high frequency switch (002) outputs a high frequency signal only during the ON period of the pulse-shaped modulation signal as shown in FIG.
- variable attenuation circuit (003) which is a level adjustment unit, is a circuit element that adjusts the level (magnitude) of the pulsed high-frequency signal output from the high-frequency switch (002) to vary the output level of the high-frequency power supply device.
- the attenuation is supplied from the level control (000) as an analog signal.
- the amplification circuit (004) is a circuit that amplifies (fixes and amplifies) the power of the pulsed high-frequency signal output from the variable attenuation circuit (003) at a predetermined amplification degree, and amplifies it to the device output level of the high-frequency power supply device. To do.
- the amplifier circuit (004) does not have a variable level function.
- the directional coupler (005) is located at the output stage of the high frequency power supply device, outputs pulsed high frequency power to the load device, and attenuates traveling wave power and reflected wave power (not shown in the figure) transmitted through the transmission line. Used to monitor the output level of the high-frequency power supply.
- the traveling wave power output from the directional coupler (005) is input to the detection circuit (006) in the level control circuit (000), and the power of the high frequency signal is converted into a voltage signal and then to the AD conversion circuit (007). Input and convert to digital data.
- the directional coupler (005), the detection circuit (006), and the AD conversion circuit (007) are also referred to as an output power detection unit.
- the configurations of the detection circuit and the AD conversion circuit are not limited to these, and any circuit that can measure the output power level of the final stage may be used.
- the level of the traveling wave converted into digital data is compared with the output level setting value (018) of the high frequency power supply device (digital value corresponding to 100W in the case of the high frequency power supply device set to 100W). To do.
- the level control value for the next pulse is determined and updated according to the comparison result. Feedback that lowers the level control value if the detected traveling wave level is higher than the output level setting value (018), and raises the level control value if the detected traveling wave level is lower than the output level setting value (018) It has a control function to control and converge the traveling wave level to a desired set value.
- the level control value for the next pulsed high-frequency signal determined by the comparison operation circuit (008) is converted to an analog voltage by the DA conversion circuit (009), and the output of the high-frequency power supply device is used as the control input of the variable attenuation circuit (003).
- Update the control value to the variable attenuation circuit (003) multiple times for one pulsed high-frequency signal one waveform until the pulsed high-frequency signal goes high (HIGH) and low (LOW)).
- the feedback may be performed a plurality of times within the pulsed high-frequency signal, in this comparative example, for the purpose of explanation, the level control value is updated once for one pulsed high-frequency signal.
- the operation of the comparison operation circuit (008) is also performed once per pulse high frequency signal.
- FIG. 2A is a flowchart of the processing of the comparison operation circuit of FIG. 1
- FIG. 2B is a timing diagram of the high-frequency output level and the control voltage of the variable attenuation circuit.
- the traveling wave of the portion where the level in the pulsed high-frequency signal (017) is stable The level is detected (step (011)).
- the output level setting value (018) is compared with the detected traveling wave level (step (012)). If the traveling wave level is small, the control value is increased (step (013)). )) If the traveling wave level is high, the control value is decreased (step (014)). 2A and 2B, since the level control is performed once for one pulsed high-frequency signal, the control value is not updated at this timing.
- step ( 015) the analog voltage of the control voltage (019) of the variable attenuation circuit (003) is updated (step ( 016)) and waits for the next high-frequency signal pulse to turn on. This flow is repeated, and level control is performed once for one pulsed high-frequency signal, and output stabilization control is performed.
- step ( 016) since the progress level of the first pulsed high-frequency signal (017) is larger than the output level setting value (018), the control voltage (019) of the variable attenuation circuit (003) is lowered after the high-frequency signal pulse is turned off. is doing. Further, since the progress level of the second pulsed high frequency signal (017) is smaller than the output level setting value (018), the control voltage (019) of the variable attenuation circuit (003) is increased after the high frequency signal pulse is turned off. is doing.
- FIG. 3 is a diagram showing an example of a high-frequency output waveform when the high-frequency power supply device is connected to a load device such as a laser.
- FIG. 3 shows the waveform after detection by the detection circuit (006) near the head of the output pulse of the pulsed high-frequency power, and the unit of the vertical axis is Watt.
- the portion surrounded by the dotted line is larger than the output level setting value. This is because the output level fluctuates because the load impedance near the head of the pulse fluctuates.
- the output when the level control value in one pulse-like high-frequency signal is fixed, the output also fluctuates according to the fluctuation of the load impedance. Depending on the phase condition of the load impedance, the output is surrounded by a dotted line in FIG. As shown in the part, there is a case where the output becomes excessive.
- the traveling wave level detection (step (011)) in the pulsed high-frequency signal described in FIGS. 2A and 2B detects the level at a point where the load impedance is sufficiently stable in the waveform of FIG.
- the output stabilization control functions in the stable part of.
- the RF circuit Since the high-frequency power supply according to the comparative example has the same level control value in the pulsed high-frequency signal, the RF circuit should output the same level in the pulsed high-frequency signal as the RF circuit even at the beginning of the pulse where the load impedance varies And When the load impedance fluctuates, the output level may fluctuate depending on the load impedance, resulting in an excessive output.
- This over output is in an overvoltage state for the circuits and components inside the device of the high frequency power supply, and depending on the degree of over output, the risk of withstand voltage of the circuit and components increases, and as a worst case, the components are damaged or discharged. there is a possibility.
- the ignition timing of the laser load or the like varies depending on the degree of overpower.
- the ignition timing tends to be earlier as the degree of overpower is higher, and the ignition timing tends to be later as the degree of overpower is lower. If the impedance varies depending on the device and the degree of overpower is different, the ignition timing may vary from device to device.
- the high-frequency power supply according to the embodiment employs a method of switching the level control in two stages within a pulsed high-frequency signal.
- A Level control for the part where the load impedance fluctuates near the beginning of the pulse in the first stage.
- B Level control for the part where the load impedance is stable and the output is stabilized in the second stage. This is realized by switching the control voltage of the variable attenuation circuit.
- the embodiment it is possible to suppress an excessive output due to a change in load impedance (laser or the like), stabilize the output, prevent a high-frequency power source from being damaged, and suppress aged deterioration.
- FIG. 4 is a schematic configuration diagram of a pulse modulation type high frequency power supply device according to the embodiment.
- the pulse type high frequency power supply device according to the embodiment includes an oscillation circuit (001), a high frequency switch (002), a variable attenuation circuit (003), a time constant circuit (021), an amplification circuit (004), and directionality.
- a coupler (005) and a two-stage level control circuit (020) are provided.
- the two-stage level control circuit (020) includes a detection circuit (006), an AD conversion circuit (007), a comparison operation circuit 1 (022), a comparison operation circuit 2 (023), a switching unit (024), A DA conversion circuit (009).
- Oscillation circuit (001) is a circuit that outputs a sine wave at a fixed level for the source oscillation of the output frequency of the high frequency power supply device. That is, a high frequency signal having a predetermined frequency, for example, about 30 MHz is output.
- the high frequency switch (002) which is a modulation unit is a switch which is turned on / off in response to a pulse modulation signal from the outside or the inside, and the high frequency output signal from the oscillation circuit (001) is repeatedly turned on and off by this switch. Modulates in a pulse form and outputs it as a pulsed high frequency signal.
- the ON state is a state where a high frequency signal is output
- the OFF state is a state where a high frequency signal is not output. That is, the high frequency switch (002) outputs a high frequency signal only during the ON period of the pulse-like modulation signal as shown in FIG.
- the variable attenuation circuit (003) which is a level adjustment unit, is a circuit element that adjusts the level (magnitude) of the pulsed high-frequency signal output from the high-frequency switch (002) to vary the output level of the high-frequency power supply device.
- the attenuation is an analog signal supplied from the two-stage level control circuit (020).
- a time constant circuit (021) follows the variable attenuation circuit (003), and a transition time when the control voltage of the variable attenuation circuit (003) is updated is set to a desired time constant.
- This circuit may be adjustable using variable elements.
- the amplifier circuit (004) is a circuit that amplifies (fixes and amplifies) the power of the pulsed high-frequency signal output from the variable attenuation circuit (003) via the time constant circuit (021) with a predetermined amplification degree. Amplifies to the device output level of the high frequency power supply.
- the amplifier circuit (004) does not have a variable level function.
- the directional coupler (005) is located at the output stage of the high frequency power supply device, outputs pulsed high frequency power to the load device, and attenuates traveling wave power and reflected wave power (not shown in the figure) transmitted through the transmission line. Used to monitor the output level of the high-frequency power supply.
- the traveling wave power output from the directional coupler (005) is input to the detection circuit (006) in the two-stage level control circuit (020), and after converting the power of the high frequency signal into a voltage signal, the AD conversion circuit (007 ) To convert to digital data.
- the directional coupler (005), the detection circuit (006), and the AD conversion circuit (007) are also referred to as an output power detection unit.
- the configurations of the detection circuit and the AD conversion circuit are not limited to these, and any circuit that can measure the output power level of the final stage may be used.
- the comparison operation circuit 1 (022), the maximum level of the leading part of the pulse (until the load impedance fluctuates and stabilizes) of the traveling wave level converted into digital data and the output level setting value ( 018) (digital value corresponding to 100 W in the case of a high-frequency power supply set to 100 W) is compared.
- the level control value (for the first stage) for the next pulse is determined and updated according to the comparison result. Feedback that lowers the level control value if the detected traveling wave level is higher than the output level setting value (018), and raises the level control value if the detected traveling wave level is lower than the output level setting value (018) It has a control function to control and converge the traveling wave level to a desired set value.
- the comparison operation circuit 1 (022) has a restriction so that the operation result does not become smaller than the first stage lower limit value (026) so that the operation result does not become too small.
- the comparison operation circuit 2 (023) compares the average level of the traveling wave level converted to digital data with the average level of the latter half of the pulse (the section where the load impedance is stabilized around 50 ⁇ ) and the high frequency power supply device.
- the output level set value (018) (digital value corresponding to 100 W in the case of a high-frequency power source set to 100 W) is compared.
- the level control value (for the second stage) for the next pulse is determined and updated according to the comparison result. Feedback that lowers the level control value if the detected traveling wave level is higher than the output level setting value (018), and raises the level control value if the detected traveling wave level is lower than the output level setting value (018) It has a control function to control and converge the traveling wave level to a desired set value.
- the level control value for the next pulse determined by the comparison operation circuit 1 (022) and the comparison operation circuit 2 (023) is switched by the switching unit (024) and converted to an analog voltage by the DA conversion circuit (009).
- the switching unit (024) switches the values of the comparison operation circuit 1 (022) and the comparison operation circuit 2 (023) according to the switching timing set value (025).
- the comparison operation circuit 1 (022), the comparison operation circuit 2 (023), and the switching unit (024) may be configured by dedicated hardware or by a CPU and a storage unit that stores an operation program for the CPU. Also good.
- FIG. 5 is a flowchart of the two-stage level control circuit (020) of FIG.
- the detection of the traveling wave level in the pulse high frequency signal is divided into two processes. One is carried out for the output level control for the vicinity of the pulse head by detecting the level of the traveling wave near the head of the pulse (step (031)). The other is to detect the level of the traveling wave after stabilization (step (035)) for controlling the output level after the load impedance is stabilized.
- step (032) After detecting the traveling wave level, compare with the output level setting value (step (032) (036)), and increase the control value if the traveling wave level is small (step (033)). (037)) If the level of the traveling wave is large, the control value is decreased (steps (034) (038)).
- the determined control value is switched in accordance with the switching timing setting value (025) in the subsequent stage (step (039)). Specifically, when the high frequency signal pulse is turned OFF, the control value is switched to the control value of the first stage (for pulse head), and after the high frequency signal pulse is turned ON, the load impedance fluctuates to match the stable timing. Switch to the control value for the second stage (after pulse stabilization). This operation is performed every pulse.
- two feedback circuits are provided, and each feedback circuit is switched to operate. Each feedback circuit is controlled independently.
- FIG. 6 is a waveform diagram of a high-frequency output having a dent.
- a in FIG. 6 is a waveform when the output of the head portion of the pulse is controlled, and B is a waveform of the comparative example.
- the level of the pulse head portion can be controlled to a level equivalent to the level of the stabilized portion, but a waveform having a dent in the middle as shown in FIG.
- the waveform at the time of switching of the variable attenuation circuit (003) and the transition waveform from the over-output state to the stable state cancel each other, the waveform has a few dents. Thereby, the high frequency electric power supplied to load is stabilized. The dent can be suppressed by adjusting the switching timing and the time constant of the variable attenuation circuit (003).
- the switching timing is given to the switching unit (024) as in the switching timing setting value (025) of FIG. 4 to switch between the two control values.
- time constant circuit at the latter stage of the variable attenuation circuit (003) may be arranged as the time constant circuit (021) in FIG. 4 and may be created with a fixed constant to a time constant so as to cancel the operation of the load impedance.
- a mechanism that can be adjusted using a variable element may be prepared.
- FIG. 7 is a waveform diagram of a high frequency output showing an example in which the first level control is not possible.
- a limit (lower limit value) is provided so as not to decrease too much with respect to the first-stage level control value so that the portion where the load impedance fluctuates falls within the first-stage level control section.
- This is implemented as the first stage lower limit (026) in FIG. (Effect) 2
- Level control in two stages enables level control so that overload does not occur in the section where the load impedance near the beginning of the pulse fluctuates. As a result, there is a risk that an overvoltage state may occur for the circuits and components inside the device. It can be removed and the occurrence of component damage and discharge can be suppressed.
- the ignition timing and characteristics of the laser load and the like can be stabilized.
- the above effect of the present embodiment can be obtained by performing two adjustments (switching timing, determination of the lower limit value of the first stage) by initial adjustment when connected to a load device such as a laser.
- the present invention is applicable to a high frequency power supply device or a semiconductor manufacturing apparatus using the high frequency power supply device.
- This application claims the benefit of priority based on Japanese Patent Application No. 2016-189689 filed on Sep. 28, 2016, the entire disclosure of which is incorporated herein by reference.
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Abstract
Description
Claims (4)
- 所定の周波数の高周波信号を出力する発振回路と、
前記回路から出力される高周波信号を、ON状態とOFF状態とを繰り返すパルス状に変調し、パルス状高周波信号として出力する変調回路と、
前記変調回路から出力されるパルス状高周波信号のレベルを調整して出力する可変減衰回路と、
前記変調回路から出力されるパルス状高周波信号の電力を増幅してパルス状高周波電力を出力する増幅回路と、
前記増幅回路から出力されるパルス状高周波電力の出力電力値を検出する出力電力検出部と、
前記出力電力検出部で検出したパルスの先頭部分の最大の出力電力値に対応する第一電圧値が入力され、該入力された第一電圧値と予め出力電力に対応する電圧値として設定された設定電圧値とに基づき、前記可変減衰回路で調整されるパルス状高周波信号のレベルを制御する第一レベル制御信号を出力する第一比較演算回路と、
前記出力電力検出部で検出したパルスの前記先頭部分より後半部分の平均レベルの出力電力値に対応する第二電圧値が入力され、該入力された第二電圧値と前記設定電圧値とに基づき、前記可変減衰回路で調整されるパルス状高周波信号のレベルを制御する第二レベル制御信号を出力する第二比較演算回路と、
切替えタイミング設定値に応じて、前記第一レベル制御信号と前記第二レベル制御信号の値を切替る切替え回路と、
前記第一レベル制御信号または前記第二レベル制御信号が更新された際の遷移時間を所望の時定数に設定する時定数回路と、を備える 高周波電源装置。 - 請求項1において、
前記第一比較演算回路は、下限値より演算結果が小さくならないように制限を設けている 高周波電源装置。 - 請求項2において、
前記一比較演算回路は、前記第一電圧値が前記設定電圧値よりも大きい場合は、前記第一レベル制御信号を小さくし、前記第一電圧値が前記設定電圧値よりも小さい場合は、前記第一レベル制御信号を大きくする 高周波電源装置。 - 請求項2において、
前記二比較演算回路は、前記第二電圧値が前記設定電圧値よりも大きい場合は、前記第二レベル制御信号を小さくし、前記第二電圧値が前記設定電圧値よりも小さい場合は、前記第二レベル制御信号を大きくする 高周波電源装置。
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KR1020197002871A KR102088602B1 (ko) | 2016-09-28 | 2017-09-01 | 고주파 전원 장치 |
JP2018542033A JP6780007B2 (ja) | 2016-09-28 | 2017-09-01 | 高周波電源装置 |
US16/331,383 US10491202B2 (en) | 2016-09-28 | 2017-09-01 | RF generator |
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CN111052874A (zh) * | 2018-06-22 | 2020-04-21 | 东京毅力科创株式会社 | 等离子体处理装置和生成等离子体的方法 |
WO2023127244A1 (ja) * | 2021-12-28 | 2023-07-06 | 株式会社京三製作所 | 高周波電源 |
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US11954555B2 (en) * | 2020-07-30 | 2024-04-09 | Nisshinbo Micro Devices Inc. | Sensor interface circuit and sensor module |
US11706723B2 (en) | 2021-06-09 | 2023-07-18 | XP Power Limited | Radio frequency generator with automatic level control |
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WO2007080696A1 (ja) * | 2006-01-16 | 2007-07-19 | Advanced Design Corp. | 高周波電源装置 |
JP2011217482A (ja) * | 2010-03-31 | 2011-10-27 | Daihen Corp | 高周波電源装置 |
JP2014175218A (ja) * | 2013-03-11 | 2014-09-22 | Hitachi Kokusai Electric Inc | プラズマ生成用電源装置 |
WO2015029937A1 (ja) * | 2013-08-26 | 2015-03-05 | 株式会社日立国際電気 | プラズマ生成用電源装置 |
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CN111052874A (zh) * | 2018-06-22 | 2020-04-21 | 东京毅力科创株式会社 | 等离子体处理装置和生成等离子体的方法 |
CN111052874B (zh) * | 2018-06-22 | 2023-02-28 | 东京毅力科创株式会社 | 等离子体处理装置和生成等离子体的方法 |
WO2023127244A1 (ja) * | 2021-12-28 | 2023-07-06 | 株式会社京三製作所 | 高周波電源 |
JP7418389B2 (ja) | 2021-12-28 | 2024-01-19 | 株式会社京三製作所 | 高周波電源 |
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US20190267978A1 (en) | 2019-08-29 |
JP6780007B2 (ja) | 2020-11-04 |
KR102088602B1 (ko) | 2020-03-12 |
KR20190025653A (ko) | 2019-03-11 |
US10491202B2 (en) | 2019-11-26 |
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