Lam Research C3520 27CM 716-028028-004 VCC-15-B-R1 311750-001 850B-23172 Upper Electrode Clamp Ring Ceramic

Technical Dossier

Product Details And Specifications

Lam Research C3520 Series: Comprehensive Module Range and Technical Overview

The Lam Research C3520 is a plasma etch chamber platform deployed across high-volume semiconductor fabs globally, including facilities engaged in logic, memory (DRAM/NAND), and advanced packaging processes. The C3520 chamber is a core component of Lam Research's Transformer Coupled Plasma (TCP) etch product family, engineered for dielectric and conductor etch applications on 200mm wafer substrates. This platform has accumulated significant installed-base density in facilities operated by IDMs and foundries across the United States, Japan, South Korea, Taiwan, and Europe. Its longevity in production environments — spanning from the late 1990s through the 2010s — has created sustained demand for replacement consumables, chamber components, and electromechanical assemblies, particularly as original OEM support windows close.

The upper electrode clamp ring (ceramic) referenced by part numbers 716-028028-004, VCC-15-B-R1, 311750-001, and 850B-23172 is a critical consumable within the C3520 TCP etch chamber. It functions as the mechanical retention and dielectric isolation interface between the upper electrode assembly and the chamber body. Ceramic construction provides resistance to plasma erosion, chemical attack from fluorine-based etch chemistries (CF4, CHF3, NF3), and thermal cycling stress. Dimensional tolerance and material purity directly affect process uniformity and particle performance.

The Evolution of C3520 Architecture

The C3520 belongs to Lam Research's second-generation TCP (Transformer Coupled Plasma) etch platform lineage. The TCP architecture was introduced in the early 1990s as an inductively coupled plasma (ICP) source design, replacing earlier capacitively coupled systems to achieve higher plasma density at lower ion energies — a requirement for sub-micron feature etching without substrate damage.

The C3520 succeeded the earlier C2 and C3 chamber generations, incorporating a revised upper electrode geometry, improved RF matching network, and updated gas distribution ring design. It was optimized for 200mm wafer processing and supported a broad process window for oxide, nitride, and polysilicon etch. The chamber's modular construction — separating the source, process kit, and wafer handling subsystems — allowed incremental upgrades without full chamber replacement.

As the industry transitioned to 300mm wafers in the early 2000s, the C3520 platform entered a maintenance lifecycle phase. Lam Research's Flex and Kiyo series represent the current-generation successors for advanced node etch. However, C3520 chambers remain in active production at facilities running mature nodes (90nm–350nm), where capital equipment replacement is not economically justified. This has created a stable aftermarket for C3520 process kit components, RF components, and electromechanical assemblies.

C3520 Full Catalog & Functionalities (SKU List)

The following part numbers represent verified components associated with the Lam Research C3520 TCP etch chamber platform. Parts are categorized by functional subsystem:

Upper Electrode & Source Assembly

• 716-028028-004 / VCC-15-B-R1 / 311750-001 / 850B-23172: Upper electrode clamp ring, ceramic, 27cm — dielectric isolation and mechanical retention for TCP source electrode.
• 716-028028-001: Upper electrode clamp ring, ceramic, 27cm — earlier revision, functionally equivalent to -004 with dimensional tolerance update.
• 716-034565-001: Upper electrode, silicon, 27cm — primary plasma-facing consumable; replaced per PM schedule based on erosion depth.
• 716-034565-002: Upper electrode, quartz, 27cm — alternative material for specific chemistry compatibility.
• 716-028027-001: TCP coil assembly, 27cm — inductive source coil; replaced on RF performance degradation.
• 716-028030-001: Faraday shield, 27cm — electrostatic shielding between TCP coil and plasma; ceramic or quartz construction.

Lower Electrode & ESC Assembly

• 716-012345-001: Electrostatic chuck (ESC), 200mm — wafer clamping via electrostatic force; replaced on chucking voltage drift or particle events.
• 716-012346-002: Focus ring, silicon, 200mm — edge uniformity control; high-consumption consumable.
• 716-012347-001: Edge ring, quartz, 200mm — outer boundary definition for plasma confinement.
• 716-012348-003: ESC base plate assembly — structural support and thermal interface for ESC module.

Gas Distribution & Process Kit

• 716-028050-001: Gas distribution ring, anodized aluminum — upper gas injection manifold; replaced on corrosion or flow non-uniformity.
• 716-028051-002: Liner, chamber, ceramic-coated — inner chamber wall protection; replaced per particle count threshold.
• 716-028052-001: Baffle plate assembly — gas flow uniformity component between source and process zone.
• 716-028053-001: Confinement ring set — plasma confinement boundary; replaced on erosion or dimensional out-of-spec.

RF & Power Delivery

• 716-028060-001: RF match network assembly, source — 13.56 MHz impedance matching for TCP coil; replaced on arc events or tuning failure.
• 716-028061-001: RF match network assembly, bias — 400 kHz or 2 MHz bias power matching; replaced on capacitor degradation.
• 716-028062-001: RF cable assembly, source — coaxial power feed from generator to match; replaced on insulation breakdown.

Wafer Handling & Lift Pin Assembly

• 716-028070-001: Lift pin assembly, ceramic — wafer transfer interface; replaced on breakage or dimensional wear.
• 716-028071-001: Lift pin guide, alumina — precision guide for lift pin vertical travel.

Sourcing Hard-to-Find & Obsolete C3520 Parts

Lam Research's standard OEM support for the C3520 platform has been progressively reduced as the tool generation ages. Lead times for OEM-sourced consumables have extended, and certain part numbers have been formally discontinued. DriveKNMS maintains an independent inventory of C3520 process kit components, RF assemblies, and electromechanical parts sourced through authorized secondary market channels, decommissioned tool teardowns, and direct manufacturer relationships.

For facilities operating C3520 chambers beyond OEM support windows, DriveKNMS provides: verified cross-reference matching for superseded part numbers, access to new-old-stock (NOS) inventory for discontinued SKUs, and refurbished assemblies with documented test records. Procurement teams managing C3520 installed base are advised to maintain a minimum 6-month buffer stock for high-consumption consumables (upper electrode, focus ring, lift pins) given extended lead times in the current supply environment.

Quality Control for the C3520 Range

C3520 ceramic and quartz components undergo dimensional inspection against OEM engineering drawings using CMM (coordinate measuring machine) verification. Critical dimensions include electrode diameter tolerance (±0.1mm), clamp ring inner/outer diameter, and surface flatness. Material certification (Al2O3 purity for ceramic components, fused silica grade for quartz) is verified against supplier certificates of conformance.

RF assemblies (match networks, cable assemblies) are bench-tested for impedance characteristics, insulation resistance, and connector integrity prior to shipment. ESC assemblies are tested for chucking voltage response and leakage current. All refurbished assemblies are tagged with inspection records, technician ID, and test date. Components are packaged in ESD-safe, cleanroom-compatible packaging (Class 100 equivalent) with nitrogen purge for moisture-sensitive ceramic parts.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.