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Lam Research DC-PROBE 810-495659R308 Integrated Module
Lam Research 810-495659R308
Product Overview
The Lam Research DC-PROBE 810-495659R308 is a high-precision integrated module designed for high-voltage power feeding and signal sensing of Electrostatic Chuck (ESC) systems in semiconductor plasma etching equipment. In Lam Research etching tools, the ESC undertakes two core process functions: firmly clamping wafers via electrostatic attraction during manufacturing processes and achieving precise wafer temperature control through backside helium conduction.
Serving as a critical sensory and conductive component in the thermo-electro-mechanical coupling system, the DC-PROBE 810-495659R308 acts as the physical channel for transmitting high-voltage DC power (typically hundreds to thousands of volts) to the internal electrodes of the ESC. It integrates high-precision voltage, current, and temperature sensing functions to feed real-time data of ESC clamping status and electrical characteristics back to the equipment main controller.
Rather than a simple wire connector, this component is a precision-engineered integrated probe module with optimized insulation design, ultra-high vacuum (UHV) compatibility, and superior high-voltage and high-temperature resistance. Its internal structure consists of multi-layer ceramic insulation, spring-loaded Pogo Pin contacts, and miniature temperature sensing elements. In the high-density plasma environment of advanced semiconductor processes, the stability and accuracy of this module directly determine wafer clamping reliability, uniformity of backside helium cooling, wafer surface temperature consistency, and critical dimension (CD) uniformity of patterned features.
Product Parameters
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Parameter Item
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Specification Value
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Product Model
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Lam Research DC-PROBE 810-495659R308
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Manufacturer
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Lam Research Corporation
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Product Type
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ESC DC Probe / High-Voltage Feeding & Sensing Integrated Module
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Maximum Operating Voltage
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Typical 3 kV DC (High-voltage insulation rating)
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Maximum Operating Current
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Typical < 1 mA (DC leakage current monitoring range)
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Insulation Resistance
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> 10¹² Ω @ 500 VDC (High-purity ceramic insulation)
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Dielectric Breakdown Voltage
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> 5 kV DC (Safety margin for voltage withstand)
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Integrated Sensor Type
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High-precision miniature thermocouple (Type K / Type T) or Pt100 RTD
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Temperature Measurement Range
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-25°C to +200°C (Covers ESC operating and baking temperature range)
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Temperature Measurement Accuracy
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±0.5°C (Typical)
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Contact Mechanism
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Spring-loaded Pogo Pin with gold-plated or rhodium-plated contacts
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Vacuum Compatibility
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Ultra-High Vacuum (UHV), Leak rate < 1.0 × 10⁻⁹ atm·cc/sec (He)
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Housing Material
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Corrosion-resistant special alloy (Hastelloy / stainless steel) with passivated surface treatment
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Insulation Material
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High-purity alumina ceramic (Al₂O₃, purity > 99.6%)
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Mounting Method
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Flange & O-ring sealing mounting on the back of ESC base
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Operating Environment
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Vacuum side (process chamber) and atmospheric side (backplate ambient)
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Process Temperature Range
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Ambient to 350°C (Limited by O-ring and ceramic insulation performance)
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Service Life
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Dependent on plasma environment and PM cycles; generally matches ESC service life or requires periodic replacement
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Structure and Composition
The structural design of the Lam Research DC-PROBE 810-495659R308 fully meets the rigorous engineering requirements of high-voltage power feeding and precision sensing in ultra-high vacuum environments. The module features a cylindrical or stepped shaft profile and is structurally divided into three functional sections: vacuum-side contact section, middle sealing and insulation section, and atmospheric-side connection section.
The vacuum-side contact section serves as the terminal connection interface between the DC-PROBE and internal ESC electrodes. It integrates one or more high-reliability spring-loaded Pogo Pins with gold or rhodium plating, delivering ultra-low contact resistance and excellent plasma corrosion resistance. The elastic structural design compensates for minor mechanical displacement caused by thermal expansion and assembly tolerance of the ESC base, ensuring stable and consistent electrical contact under extreme temperature cycling conditions.
As the core functional part of the module, the middle sealing and insulation section adopts high-density, high-purity alumina ceramic as the main body. The ceramic structure not only supports and conducts high-voltage DC power from the atmospheric side to the vacuum side, but also provides complete electrical isolation between high-voltage vacuum electrodes and grounded housing, as well as between high-voltage power lines and low-voltage temperature sensing circuits. The ceramic surface undergoes precision metallization and brazing processes to form a hermetic vacuum seal with the metal flange, sustaining chamber ultra-high vacuum integrity.
The atmospheric-side connection section is equipped with high-voltage connectors for external shielded high-voltage cable connection and low-noise miniature connectors (LEMO / Hirose series) for temperature sensor signal output. Miniature EMI filtering components are optionally integrated inside this section to suppress RF electromagnetic interference coupled into the control system through wiring harnesses.
Key Features and Advantages
1. Superior Insulation Performance and High-Voltage Operational Reliability
Adopting high-density, high-purity alumina ceramic as the insulating medium, the module delivers far higher insulation resistance and dielectric strength than conventional polymer materials. Under extreme operating conditions with drastic temperature fluctuations, strong RF electromagnetic fields, and corrosive atmospheres, it prevents creepage and dielectric breakdown under long-term high-voltage (several kilovolts) loading. This effectively protects high-value RF generators and process control systems from reverse high-voltage damage, ensuring equipment stability and operator safety.
2. High-Precision Integrated Temperature Feedback
The built-in high-precision temperature sensors (thermocouple / RTD) enable real-time and accurate monitoring of ESC base temperature. The equipment main controller precisely captures ESC thermal status and dynamically adjusts backside helium pressure or heater power, realizing fast and high-precision closed-loop wafer temperature control. This capability is critical for stabilizing photoresist etching selectivity and maintaining CD uniformity in advanced-node semiconductor processes.
3. Robust Vacuum Sealing and Long Service Life Design
Adopting metal-ceramic brazed hermetic sealing technology, the module achieves zero-leakage reliability in UHV environments. The corrosion-resistant alloy housing effectively resists erosion by residual fluorine-based and chlorine-based process gases in the chamber. Combined with the wear-resistant coating of spring probes, the 810-495659R308 delivers a service life matching the ESC assembly, significantly reducing unplanned equipment downtime caused by probe module failures.
Application Fields
The Lam Research DC-PROBE 810-495659R308 is primarily integrated into advanced 300mm wafer etching equipment, serving as a core power feeding and sensing component for ESC electrical and thermal systems of Lam Research 2300 series (Kiyo dielectric etchers, Flex conductor etchers) and Versys series metal etchers. It is applicable to all plasma process steps that require electrostatic wafer clamping and backside temperature control.
In logic chip manufacturing, it stabilizes ESC clamping force and optimizes wafer thermal contact for gate etching and spacer etching processes. In memory chip production, it ensures process stability for high-aspect-ratio channel hole etching in 3D NAND devices and deep trench etching in DRAM devices.
Beyond etching processes, the module is also compatible with ESC systems of Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD) equipment. It effectively resolves common fab process defects including wafer drifting caused by insufficient ESC clamping, backside helium leakage alarms, and CD deviation induced by inaccurate temperature feedback. As a priority replacement spare part for ESC fault diagnosis and preventive maintenance, it plays a vital role in sustaining high wafer yield and equipment uptime for advanced semiconductor manufacturing processes.
Related Products
- 810-495659R307: Predecessor version of R308 with minor differences in probe contact force, insulation grade, or sensor configuration, compatible with early-batch and differently configured ESC systems.
- 810-495659R309: Upgraded successor model with higher-precision temperature sensing elements and enhanced EMI filtering performance.
- 810-495660-001: Matched high-voltage shielded coaxial cable assembly, transmitting DC high-voltage power and temperature sensing signals between the chamber backplate and atmospheric-side power/controller units.
- 830-101520-012: High-purity metal O-ring seal (Helicoflex / C-seal) for module mounting, ensuring UHV hermetic sealing between the probe module and ESC base flange.
- 810-495658-000: Matching ESC main assembly, with the 810-495659R308 serving as its dedicated electrical access module.
- 810-800256-207: Supporting RF power module, working with the DC probe to form the composite electrical environment of RF bias superimposed with DC clamping voltage for ESC operation.
- 810-099175-012: Multi-channel temperature control board, complementary to the probe’s temperature sensing function for signal acquisition and PID closed-loop heating regulation.
Installation and Maintenance
Pre-Installation Preparation
Before installation, confirm the process chamber has returned to atmospheric pressure and room temperature. Ensure all main equipment power and ESC high-voltage power are completely shut down and locked out/tagged out (LOTO). Operators must wear ESD anti-static wristbands and cleanroom gloves.
Insert the probe module gently into the mounting hole on the ESC backplate, ensuring precise alignment between the front-end Pogo Pins and ESC electrode contacts. Forcible or tilted insertion is prohibited to avoid damage to precision probe structures. Tighten flange bolts strictly per factory-specified torque values and cross-sequence fastening standards. When connecting atmospheric-side high-voltage cables and signal wires, verify accurate pin alignment and full locking of connectors, and keep connector dust caps clean before assembly.
Maintenance Guidelines
Include the 810-495659R308 in synchronous preventive maintenance plans with the ESC assembly. During each chamber maintenance (CM) cycle, test probe contact resistance with a professional contact resistance tester; clean or replace the module if resistance exceeds specification thresholds. Measure insulation resistance between high-voltage lines and housing, as well as between high-voltage lines and temperature signal lines with a megohmmeter to confirm normal insulation performance.
During daily equipment inspections, monitor ESC leakage current via the HMI interface. Abnormal leakage current rise indicates potential insulation degradation of the probe module or ESC base damage. Clean atmospheric-side connector interfaces with electronic-grade contact cleaner and lint-free wipes, avoiding liquid penetration into connector internal structures.
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