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The Silicon Top Ring, designated AMAT OEM part number 0200-03559K and supplied by ESCT Fab Support under part number ES1099-014, is a high-purity silicon consumable that sits at the upper periphery of a 300 mm plasma etch process chamber. The “(G)” suffix in the raw part name denotes a specific dimensional or grade variant within the silicon top ring family. As an annular plasma-facing component, it forms part of the upper electrode and confinement architecture, framing the gas-injection and discharge zone directly above the wafer and helping to define the geometry of the plasma sheath at the chamber’s outer boundary.
In modern dielectric and conductor etch chambers, the region above the wafer is built up from a stack of concentric silicon and ceramic parts. The top ring occupies the outer ring of this upper assembly, surrounding the central silicon electrode or showerhead and bridging the transition between the powered or grounded ceramic structures and the active discharge volume. Because it is fabricated from the same high-purity silicon used elsewhere in the upper electrode, it participates directly in the plasma chemistry rather than merely housing it, behaving as a sacrificial, etch-compatible surface that protects more costly structural parts behind it.
Although the raw nomenclature is terse, the function is precise: the silicon top ring controls how the plasma terminates at the upper edge of the chamber, manages a portion of the radial uniformity of the discharge, and supplies a consistent, contamination-controlled silicon surface that ages predictably. Its condition has a measurable influence on edge etch rate, sheath shape and particle generation, which is why fabs treat it as a scheduled-replacement consumable rather than a permanent fixture.
Within the upper electrode assembly, the silicon top ring performs several overlapping roles that combine plasma confinement, chemical compatibility and mechanical framing. It is engineered so that its erosion characteristics match the surrounding silicon parts, allowing the whole upper stack to wear in a coordinated and predictable manner.
The defining property of this component is its material: high-purity silicon selected for its etch compatibility, controlled erosion rate and freedom from metallic contaminants. The grade and surface finish are chosen so that the ring behaves identically to the original part inside the plasma, both chemically and physically.
High-purity silicon is used because it can be consumed by the plasma without introducing yield-limiting impurities, and because it can be manufactured to tight resistivity and crystallographic specifications. These attributes keep the chamber environment clean and the electrical behaviour of the upper assembly consistent.
The machined finish and dimensional tolerances of the ring govern how cleanly it seats against adjacent parts and how uniformly it erodes. A tightly controlled surface reduces micro-masking, flaking and early particle generation.
Because the silicon top ring sits at the boundary of the active plasma, its condition propagates directly into wafer-level results. As it erodes, the local geometry and silicon-surface area change, and these changes show up first at the wafer edge, the most sensitive part of the process window.
The primary wear mechanism is steady erosion from ion bombardment and chemical attack. Over time the ring thins and its profile changes, gradually shifting the local plasma geometry and edge etch behaviour until the part reaches the end of its usable life and must be replaced on schedule.
Localised pitting, micro-cracking or flaking can develop as erosion progresses or where thermal and mechanical stresses concentrate. These features release particles into the chamber, driving up defectivity and, in severe cases, depositing fragments on the wafer.
Improper seating, contamination at the contact interface or repeated thermal cycling can produce uneven contact, hot spots and stress fractures. Silicon is brittle, so mishandling during installation or non-uniform clamping is a frequent cause of premature failure.
Replacement should follow the tool owner’s qualified preventive-maintenance procedure, performed by trained personnel under appropriate cleanliness controls. The silicon top ring is brittle and contamination-sensitive, so handle it carefully and verify it. The following sequence outlines the typical approach.
As a scheduled-replacement consumable, the silicon top ring is well suited to a managed spares programme that balances availability against carrying cost. ESCT Fab Support supplies this part as a 2nd-source new component to help fabs avoid extended OEM lead times while maintaining form, fit and function.
It is a high-purity silicon consumable ring that sits at the outer periphery of the upper electrode assembly in a 300 mm plasma etch chamber, framing the discharge zone above the wafer and helping to define plasma confinement and edge etch behaviour.
No. This is supplied as a 2nd-source, new OEM-compatible part. It is not an original AMAT part, but it is verified to match the original in form, fit and function for the applicable chamber, cross-referenced to OEM P/N 0200-03559K.
It is manufactured from high-purity silicon, selected for its etch compatibility, controlled erosion rate and low contamination. This allows it to be consumed by the plasma predictably without introducing impurities that would harm device yield.
Replacement is typically driven by accumulated RF hours or wafer counts defined in the tool’s preventive-maintenance plan, supported by trends in edge etch uniformity and particle counts. Visible thinning, pitting or flaking on inspection are clear signs the ring should be changed.
The standard lead time is 4-5 weeks. We recommend holding buffer stock or arranging consignment for scheduled-replacement consumables so that planned maintenance is never delayed by procurement.
Any plasma-facing consumable change should be followed by chamber seasoning and process qualification per your standard procedure. Because the part is matched to the original geometry and material, qualified tools generally return to their established process window after normal seasoning.
The Silicon Top Ring (AMAT OEM P/N 0200-03559K, ESCT P/N ES1099-014) is a high-purity silicon consumable that defines the outer boundary of the upper electrode in a 300 mm plasma etch chamber. It manages plasma confinement and edge uniformity while presenting a clean, etch-compatible silicon surface that ages predictably. Supplied by ESCT Fab Support as a 2nd-source new part with a 4-5 week lead time, it offers a cost-effective, form-fit-function match that helps fabs keep their preventive-maintenance schedules on track and their edge yield under control.
Disclaimer: This part is supplied by ESCT Fab Support as a new, OEM-compatible second-source component, verified to the form, fit and function of Applied Materials part number 0200-03559K. It is not an original OEM part and is not sold as one. It is not manufactured by, endorsed by, or affiliated with Applied Materials, and all manufacturer names and part numbers are quoted for identification and compatibility purposes only.
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