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Lam Research 810-253279-204 Terminal Execution Unit
Lam Research 810-253279-204
Product Overview
The Lam Research 810-253279-204 is a high-precision gas showerhead specially designed for Lam Research’s advanced plasma etching systems. It serves as the core hardware component in the process chamber for achieving uniform gas injection and consistent plasma distribution. As the terminal executive part connecting the gas supply system and the vacuum reaction chamber, it is installed at the upper electrode position of the chamber.
This component delivers process gases (including etchants, passivants, and inert gases) evenly to the reaction area above the wafer surface through thousands of micro-pores. Combined with RF (Radio Frequency) energy input, it functions as part of the electrode to excite and regulate plasma. Its design performance directly determines the wafer-level etching rate, process uniformity, and critical dimension (CD) control accuracy in semiconductor manufacturing.
Positioned directly opposite the electrostatic chuck (ESC), it forms a complete process reaction field together with the ESC. Its overall quality and operational status are key factors affecting wafer yield and long-term stable operation of semiconductor etching equipment.
Product Specifications
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Parameter Name
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Parameter Value
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Product Model
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810-253279-204
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Manufacturer
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Lam Research
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Product Type
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Showerhead / Gas Distribution Plate (Process Chamber Component)
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Material
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High-purity silicon (monocrystalline/polycrystalline) or high-purity SiSiC (subject to specific process requirements)
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Applicable Processes
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Plasma Etching (Dielectric Etch, Conductor Etch, Metal Etch)
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Applicable Equipment
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Lam Research 2300 Series, Kiyo Series and other 300mm etching platforms
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Aperture Range
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Typically 0.3mm to 1.0mm (customizable per process recipe)
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Surface Treatment
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Precision grinding and polishing; surface coating available for partial models
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Purity Requirement
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≥ 99.999% (for monocrystalline/polycrystalline silicon materials)
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Working Temperature
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Resistant to temperatures above 200°C (under auxiliary heating by ceramic heater)
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Physical Dimension
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Compatible with chamber specifications for 300mm (12-inch) wafer processing
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Electrical Function
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Serves as part of the RF upper electrode to participate in plasma discharge
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Structure and Composition
The Lam Research 810-253279-204 features a sophisticated structural design that integrates precision mechanical machining and electrochemical engineering. Visually, it is a circular thin plate covering the full diameter of a 300mm wafer, with a standardized thickness and a structured gas diffusion groove on the backside. Its core performance relies on two pivotal design optimizations.
First, thousands of micron-scale pores are evenly distributed on the wafer-facing surface. The position, diameter, and inclination angle of each pore are precisely defined via fluid simulation, achieving molecular-level uniform distribution of process gases on the wafer surface. Second, as the conductive RF upper electrode, it ensures uniform coupling of RF energy into the plasma through its integral structure.
Rather than a simple flat plate, the component adopts a labyrinth-style gas plenum on its backside. This structure buffers and rectifies the incoming process gas from the top chamber air inlet through multi-stage pressure stabilization, before releasing the gas uniformly via front-side micro-pores. The design logic of “pressure equalization first, flow equalization second” guarantees consistent flow velocity and molecular density of gases reaching the wafer surface.
In addition, the edge structure is tightly matched with the upper electrode’s cooling system (water-cooled or air-cooled) to maintain uniform surface temperature of the showerhead, effectively preventing structural deformation and process drift caused by thermal expansion and contraction.
Key Features and Advantages
1. Outstanding Process Uniformity
The core advantage of the Lam Research 810-253279-204 lies in its superior gas distribution uniformity. Supported by original factory CFD simulation and ultra-precision machining, the machining tolerance of thousands of micro-pores is controlled within an extremely narrow range. This minimizes the deviation of reaction gas molecular density across the entire wafer plane, which is critical for optimizing within-wafer uniformity of critical dimension (CD) in chip etching processes.
2. High-purity Material and Low Contamination Risk
Fabricated with ultra-high-purity silicon materials, the showerhead greatly reduces metal contamination caused by electrode sputtering and corrosion. Advanced logic and memory chip manufacturing impose stringent control standards for metal ions such as Fe, Cu, and Al. The high-purity silicon structure effectively avoids gate oxide breakdown and device leakage induced by contaminants, fundamentally improving wafer production yield.
3. Optimized Plasma Coupling Efficiency
Functioning as both a physical gas channel and a core part of the RF circuit, the component features uniform resistivity and a large-area electrode structure. It delivers a smooth radial distribution of plasma density above the wafer, reducing the occurrence of abnormal discharge and local arcing. This enables a more stable process window and highly predictable etching results for mass production.
Application Fields
The Lam Research 810-253279-204 is a critical consumable component widely used in advanced semiconductor etching processes for 300mm (12-inch) wafer production lines. It is extensively applied in core logic chip manufacturing processes, including gate etching, shallow trench isolation (STI) etching, and contact/via etching.
For memory chip production, it plays a decisive role in challenging ultra-high aspect ratio (HAR) processes, such as DRAM capacitor etching and 3D NAND Flash channel hole etching. In harsh working environments with continuous high-density plasma (HDP) bombardment and strong corrosive gases (fluorine-based and chlorine-based), the showerhead acts as both a gas delivery terminal and a protective barrier for the process chamber.
Process engineers formulate scientific preventive maintenance (PM) plans by monitoring the RF working hours of the component and analyzing CD measurement data, ensuring consistent process performance across batches and equipment. For semiconductor manufacturers, adopting original-specification showerheads is a prerequisite for reliable advanced process research and stable mass production.
Related Products
- Lam Research 810-253279-203: The previous generation model with slight differences in micro-pore diameter and quantity. It is compatible with early or specific hardware platforms and requires strict process matching verification.
- Lam Research 810-253279-205: The upgraded version of the base model, optimized with enhanced surface coating technology (such as Y₂O₃ anti-corrosion coating) and improved cooling channel design, extending service life and adapting to high-power plasma processes.
- Lam Research 810-253279-xxx: Series variant showerheads for differentiated etching scenarios, with customized base materials (including SiC-coated versions for metal etching processes).
- Lam Research 810-253278-xxx: Small-size showerhead series for 200mm (8-inch) wafer platforms, adopting consistent structural design logic and fully compatible with old-generation production lines.
- Lam Research 811-000231-xxx: Electrostatic Chuck (ESC). As the lower electrode paired with the showerhead, it forms a complete process reaction field and serves as a core matching component in the chamber.
- Lam Research 771-000063-xxx: RF Match Network. It efficiently transmits RF power to the upper electrode (showerhead), and its tuning status directly determines the uniformity of surface plasma distribution.
Installation and Maintenance
Pre-installation Preparation
Installation of the Lam Research 810-253279-204 is a high-standard cleanroom operation. Before installation, ensure the equipment is fully shut down, pressure is completely released, and the device returns to room temperature. Operators must wear complete cleanroom suits, gloves, and face shields. Clean the mating surface of the upper electrode assembly thoroughly with lint-free cloths and isopropyl alcohol (IPA).
Given the brittleness of the component material, hold the edge steadily with both hands during handling, and place it in position smoothly with professional vacuum tweezers or lifting jigs. Fasten the pressure ring screws strictly in the specified torque sequence and standard torque values (N·m).
Maintenance Recommendations
The showerhead is a consumable component whose service life is measured by cumulative process RF hours. After each chamber dry clean cycle, maintenance engineers shall inspect the surface condition with a microscope or professional thickness measuring equipment. Focus on checking micro-pore damage (aperture enlargement or collapse caused by plasma bombardment), abnormal discoloration, and surface sediment accumulation.
Immediate replacement is required once micro-pore blockage, obvious wear, or excessive thickness loss is detected. This effectively prevents mass wafer scrapping caused by uneven plasma distribution and particle shedding, ensuring continuous and stable process operation.
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