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Lam Research 810-002895-102 Control Valve Body Assembly
Lam Research 810-002895-102
Product Overview
The Lam Research 810-002895-102 is an ultra-precision fluid and gas flow control valve assembly specifically designed for semiconductor plasma etching and deposition equipment. As a critical actuator component within Lam Research process modules, it delivers stepless, high-speed, and high-resolution regulation of chamber pressure and specialty process gas mass flow under ultra-low pressure and corrosive gas operating environments.
Distinguished from standard industrial valves, this assembly integrates high-sensitivity sensor feedback interfaces and ultra-low hysteresis precision transmission mechanisms. It converts electrical control signals into nanoliter-per-second-level gas flow adjustments and millitorr (mTorr)-grade fine pressure trimming, directly determining the uniformity of wafer surface chemical reaction rates and process endpoint accuracy. It plays a decisive role in enabling cutting-edge processes such as Atomic Layer Etching (ALE) and Atomic Layer Deposition (ALD) in the manufacturing of 3D NAND, DRAM, and advanced logic chips.
Model 810-002895-102 belongs to Lam Research’s highly customized spare parts portfolio. Designed in strict accordance with SEMI (Semiconductor Equipment and Materials International) standards, it fully meets the stringent semiconductor manufacturing requirements for cleanliness, corrosion resistance, high-temperature bake tolerance, and ultra-pure water cleaning compatibility. Constructed with plasma-bombardment-resistant special alloy substrates and high-performance sealing materials, the component maintains consistent repetitive positioning accuracy and zero-leakage reliability over hundreds of thousands of high-frequency actuation cycles.
Product Specifications
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Parameter Name
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Parameter Value
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Product Model
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Lam Research 810-002895-102
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Manufacturer
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Lam Research
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Product Type
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Precision Flow / Pressure Control Valve Assembly
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Applicable Media
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Ultra-high-purity process gases (Cl₂, CF₄, HBr, WF₆, etc.), DI water and coolant
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Valve Body Material
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Corrosion-resistant stainless steel (316L VAR) or Hastelloy alloy
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Sealing Material
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FFKM (Perfluoroelastomer) or metal seal (C-ring)
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Drive Method
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Stepper motor / voice coil motor driven (high-precision linear actuator)
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Control Accuracy
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Stroke resolution: < 0.1% full scale
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Repetitive Positioning Accuracy
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± 0.05% full scale
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Response Time
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< 50 ms (90% step response of full stroke)
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Maximum Working Pressure
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150 psig (configuration-dependent)
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Internal Leak Rate
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< 1.0 × 10⁻⁹ atm·cc/sec (He) (ultra-high vacuum compatible)
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Operating Temperature Range
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20°C to 80°C (optional valve body heating up to 150°C)
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Mounting Interface
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ISO-KF / VCR or Lam custom integrated flange interface
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Cleanliness Class
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Class 1 assembly environment, double-bag sealed packaging
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Structure and Composition
The Lam Research 810-002895-102 adopts semiconductor-grade precision manufacturing standards in both internal structure and material engineering. The assembly is integrated with three functional modules: a drive module, a transmission and feedback module, and a fluid contact module.
The top-mounted drive module integrates a miniaturized stepper or voice coil motor with optimized coil design, featuring ultra-low heat generation and high torque density to ensure superior thermal stability in vacuum environments. The middle transmission and feedback module serves as the core precision unit, converting the motor’s rotational motion into linear valve stem movement. Equipped with high-precision displacement sensors (LVDT or potentiometer type), it forms a closed-loop control system that feeds back the absolute valve core position to the main equipment controller in real time, compensating for potential mechanical backlash.
The fluid contact module (valve body and valve core) represents the core design highlight of the 810-002895-102. The valve core is manufactured from custom-matched special alloy materials and processed via ultra-precision grinding, achieving a surface roughness of Ra < 0.1 μm for molecular-level fitting with the valve seat sealing surface.
Replacing traditional packing sealing structures, the assembly adopts welded metal bellows as dynamic sealing elements. The all-metal bellows design delivers near-zero dynamic leakage performance and ultra-long fatigue life, supporting millions of reciprocating valve stem movements. Precise adjustment of the annular throttling gap between the valve core and seat enables linear and accurate flow and pressure control. The full-welded or metal gasket sealing structure eliminates aging and leakage risks of O-rings in corrosive gas environments, guaranteeing Ultra-High Vacuum (UHV) integrity.
Key Features and Advantages
Ultra-High Control Accuracy and Resolution
Equipped with high-sensitivity position sensors and precision transmission mechanisms, the 810-002895-102 achieves ultra-high-resolution control of process gas flow and chamber pressure. Its fine tuning capability delivers exceptional uniformity of wafer surface chemical reactions, which is critical for manufacturing integrated circuits with linewidths below 10 nm, significantly improving chip electrical performance parameters and production yield.
Superior Corrosion Resistance and Extended Service Life
Specially engineered for halogen-based corrosive gases (chlorine, nitrogen trifluoride, etc.) commonly used in semiconductor processes, the valve body adopts premium corrosion-resistant alloy with specialized passivation surface treatment. Combined with the unique all-metal bellows dynamic sealing technology, it completely eliminates micro-particle wear and external leakage risks associated with traditional packing seals. The model’s design lifespan far exceeds industrial standards, effectively extending Mean Time Between Failures (MTBF) and reducing Fab operational and maintenance costs.
Ultra-Fast Dynamic Response
Advanced pulsed plasma etching processes require synchronous high-speed switching of gas flow with RF power pulse frequency. Featuring a response time of less than 50 ms, the assembly perfectly tracks high-frequency process recipe changes, ensures smooth gas switching during transient states, suppresses particle generation caused by process abrupt changes, and provides a reliable execution foundation for advanced digital twin process models.
Application Fields
The Lam Research 810-002895-102 is primarily integrated into advanced 200mm (8-inch) and 300mm (12-inch) wafer fabrication equipment, functioning as a core precision valve component in the gas distribution systems and Pressure Control Units (PCU) of Lam Research 2300 series tools (including Kiyo series dielectric etchers and Flex series conductor etchers).
Its applications cover key etching steps in logic chip manufacturing, including Shallow Trench Isolation (STI) etching, polysilicon gate etching, and Back-End-of-Line (BEOL) Damascus metal interconnect etching. For memory chip production, it is widely deployed in High-Aspect-Ratio (HAR) channel hole etching for 3D NAND flash and deep trench etching for DRAM capacitors, precisely controlling reactant concentration and byproduct exhaust rate.
In broader semiconductor and emerging technology sectors, the assembly is applicable to laser lift-off equipment for Micro LED mass transfer and deep silicon etching processes for MEMS (Micro-Electro-Mechanical Systems). It effectively resolves critical process challenges in wafer fabrication, including Critical Dimension (CD) deviation, etching rate drift, and aggravated microloading effects caused by unstable pressure and flow control. As a preferred replacement component for Fab process engineers in new process debugging and low-yield troubleshooting, it is indispensable in front-end (FEOL) and mid-end process modules of global wafer fabs.
Related Products
- Lam Research 810-002895-101: Early variant of the same series with minor differences in drive motor torque specifications and valve core throttling curve design, suitable for process chambers with lower gas flow and pressure ratings.
- Lam Research 810-002895-103: High-pressure version with reinforced valve body structure and high-power actuator, designed for CVD and ALD processes requiring high-flow precursor injection.
- Lam Research 810-002895-200: Dedicated high-precision valve stem seal repair kit for the 810-002895 series, including spare all-metal bellows and high-purity installation tools for on-site maintenance and replacement.
- Lam Research 810-003210-001: Ultra-high-precision Mass Flow Controller (MFC) replacement part for chamber gas distribution systems. It works in tandem with the 810-002895-102, with the MFC responsible for flow measurement and the valve assembly for terminal fine pressure regulation.
- Lam Research 810-002895-050: Larger-bore exhaust and isolation valve in the same series, installed downstream on dry pump sides for rough pumping and rapid pressure relief, complementing the fine regulation function of the 810-002895-102.
- Lam Research 830-001056-002: Custom flexible heating belt and temperature controller for the valve assembly, maintaining stable high-temperature valve operation and preventing particle contamination caused by process gas condensation.
Installation and Maintenance
Pre-Installation Preparation
Before installing the Lam Research 810-002895-102, ensure the equipment is fully shut down and purged to completely remove residual process gas and confirm the system is at atmospheric pressure. All operators must wear cleanroom suits and nitrile gloves and perform operations in a Class 100 or higher clean environment.
Strictly follow original Lam installation drawings to verify medium flow direction markings on the assembly. Use a calibrated torque wrench to tighten VCR or flange bolts in a cross-sequence pattern. During installation, protect flange surfaces and internal flow channels from scratches and particle contamination, and ensure all electrical connectors are pin-intact and securely locked.
Maintenance Guidelines
Incorporate the 810-002895-102 into standard equipment PM schedules. After each chamber cleaning cycle or specified RF operating duration, test full-stroke actuation smoothness and response time via built-in equipment self-diagnostics or external signal sources. Immediately replace or return the assembly for factory repair if stuttering, abnormal noise, or hysteresis anomalies are detected in control curves.
During routine inspections, monitor position following error (deviation between actual valve position and command position) via the equipment HMI. Sustained deviation growth indicates potential bellows fatigue or valve core wear. Do not wipe external nameplates with organic solvents such as acetone; clean gently with lint-free cloths dampened with isopropyl alcohol.
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