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Lam Research 571-065780-703 Probe Module
Lam Research 571-065780-703
Product Overview
The Lam Research 571-065780-703 is an RF voltage/current detection probe module specially designed for high-density plasma etching processes. It serves as a terminal precision detection and feedback component in the RF transmission system of Lam Research semiconductor manufacturing equipment. As a core sensing unit in the process control link, it undertakes high-precision signal acquisition and feedback tasks for RF energy transmission.
The core function of this module is to capture vector parameters in real time with high fidelity on the RF energy transmission path, including the voltage amplitude, current amplitude, and phase difference between incident and reflected waves. Through its built-in high-precision analog-to-digital conversion and signal conditioning circuits, it converts analog sensing signals into digital signals that can be directly identified and processed by the equipment controller. In semiconductor etching processes, the accurate impedance vector data provided by the module supports fast and precise tuning of the RF matching network. Its detection accuracy directly determines the matching response speed and the minimum level of reflected power, which is critical to process stability and yield consistency.
Adopting a compact coaxial straight-through mechanical structure, the 571-065780-703 highly integrates sensing elements and signal conditioning circuits into a single module. It is equipped with a high-bandwidth capacitive voltage divider and current transformer as core sensing components, paired with low-noise amplification circuits and temperature compensation networks. This configuration ensures high linearity and repeatability of detection signals under wide power ranges and dynamic process conditions. The module transmits preprocessed analog or digital signals to the matching network control board or the main equipment controller via dedicated shielded cables, forming a closed-loop control system for RF parameters. In advanced semiconductor etching processes, the precise phase data acquired by the probe enables low-reflection-power matching, stabilizes plasma states, and significantly improves the uniformity of etching critical dimensions (CD).
Product Specifications
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Parameter Name
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Parameter Value
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Product Model
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571-065780-703
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Manufacturer
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Lam Research
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Product Type
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RF VI (Voltage/Current) Probe
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Applicable Frequency Range
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2 MHz / 13.56 MHz / 27 MHz / 60 MHz (Multi-frequency Compatibility)
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Maximum Withstand Power
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5000 W (Continuous Wave Mode)
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Voltage Detection Range
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10 V to 5000 V (Peak-to-Peak)
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Current Detection Range
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0.5 A to 100 A (RMS)
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Phase Detection Accuracy
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±0.1° (Typical Value)
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Amplitude Detection Accuracy
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±1% of Reading (Typical Value)
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Output Signal Type
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Differential Analog Signal (Voltage/Current/Phase) or Digital Signal
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Impedance Characteristic
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50 Ω (Input/Output Coaxial Characteristic Impedance)
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Connector Type
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Input: 7/16 DIN Female / Output: 7/16 DIN Male (Straight-through)
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Operating Temperature Range
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10°C to 50°C (Non-condensing)
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Physical Dimensions
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Approx. 150mm × 80mm × 80mm (Excluding coaxial interface protrusions)
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Installation Method
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Series installation in the middle of RF transmission line (Flange fixing or bracket support)
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Structure and Composition
The internal structure of the Lam Research 571-065780-703 adopts the core design concept of precision RF measurement technology. Its housing is precision-cast from high-permeability metal alloy materials, which provides robust physical protection and forms an efficient electromagnetic shielding layer. This design effectively prevents external stray electromagnetic fields from interfering with weak detection signals and ensures signal purity during acquisition and transmission.
The module features a coaxial straight-through structural layout, with the input and output ends on the same axis. This design minimizes discontinuity interference on the RF transmission path and maintains an extremely low VSWR (Voltage Standing Wave Ratio) increment, avoiding adverse effects on RF power transmission efficiency.
Internally, the RF main transmission line runs through the center, serving as the common reference path for voltage and current sensing. The voltage detection unit adopts a precision high-voltage capacitive voltage divider structure. Its high-voltage arm is composed of ceramic capacitors with special dielectric materials, featuring an ultra-low temperature coefficient and excellent RF frequency response. It can accurately collect RF voltage signals on the transmission line without introducing obvious phase shift.
For current detection, a through-core current transformer is applied to acquire RF current signals through magnetic core coupling, delivering wide bandwidth and high saturation current performance. The weak signals collected by the two core sensing components are amplified by a built-in high-performance low-noise preamplifier, then processed by temperature-compensated signal conditioning circuits, and finally output in differential analog or digital formats.
The module integrates a self-test circuit, which can verify the integrity of the sensing channel through external commands and ensure the reliability of detection data. Some versions of the 571-065780-703 are also equipped with a built-in temperature sensor to monitor the operating temperature of the module, realizing dynamic correction of temperature drift and further improving long-term detection stability.
Key Features and Advantages
1. Outstanding Detection Accuracy and Wide Dynamic Range
Equipped with high-precision sensing elements and professional precision calibration technology, the Lam Research 571-065780-703 maintains excellent amplitude accuracy and phase linearity in a wide power range from tens of watts to several kilowatts. Its voltage and current detection accuracy are both better than ±1%, and the phase detection accuracy reaches an outstanding level of ±0.1°. The high-precision vector data truly reflects the real impedance state of the process chamber, enabling the rear-end matching network to execute accurate tuning decisions. It effectively minimizes reflected power, provides stable and reliable data support for plasma etching processes, and guarantees long-term process repeatability and stability.
2. Wide Bandwidth Compatibility and Low Insertion Loss
The probe is compatible with multiple mainstream RF frequencies used in semiconductor etching processes, including 2 MHz, 13.56 MHz, 27 MHz, and 60 MHz, enabling flexible deployment on process equipment with different configuration requirements. Benefiting from the optimized coaxial straight-through structure and impedance matching design, the module achieves extremely low insertion loss (typically less than 0.05 dB) and controllable phase deviation. It will not cause substantial attenuation of effective RF power transmission or destroy the overall impedance characteristics of the system, realizing high-precision detection while ensuring the efficient operation of the RF transmission system.
3. High Reliability and Excellent Environmental Adaptability
Targeting the strict operating requirements of semiconductor cleanrooms and complex industrial environments with electromagnetic interference and temperature fluctuations, the module adopts rigorous industrial design and manufacturing standards. Key internal sensing components undergo aging screening and temperature compensation pairing, ensuring stable detection performance within the operating temperature range of 10°C to 50°C. The integrated fully metal sealed structure provides superior EMC (Electromagnetic Compatibility) performance and effectively resists corrosion from residual chemical gases in cleanrooms. It reduces the risk of process abnormalities caused by component drift or failure, realizing long-term stable and reliable operation in harsh semiconductor production environments.
Application Fields
The Lam Research 571-065780-703 is widely used in dielectric etching and conductor etching processes in front-end semiconductor manufacturing, and is a standard matching detection component for the RF transmission links of Lam Research 2300-series and Exelan-series etching equipment. It is installed between the RF power supply output and the matching network input, or between the matching network output and the reaction chamber, realizing full-process real-time monitoring of RF energy transmission parameters.
In logic chip manufacturing, the module supports precise RF closed-loop control for key processes such as gate etching, contact hole etching, and metal hard mask trenching. In memory chip production, it meets the high-precision real-time monitoring requirements of 3D NAND deep hole etching and DRAM capacitor etching processes.
This probe solves two core pain points of advanced semiconductor etching processes. First, it ensures real-time closed-loop control. By outputting high-speed and high-precision voltage, current, and phase data, it enables the matching network to respond quickly to transient plasma state changes, maintain ultra-low reflected power, protect RF power supply equipment, and improve energy utilization efficiency. Second, it provides powerful diagnostic support for process development. The high-fidelity waveform data collected by the module helps process engineers analyze the variation rules and internal mechanisms of plasma impedance, optimize process recipes, and develop new pulsed etching processes. It effectively shortens the process development cycle and accelerates the mass production introduction of advanced semiconductor process nodes.
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