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The Silicon Top Ring identified by AMAT OEM part number 0200-03559K is a high-purity silicon consumable that sits in the upper region of a 300 mm plasma etch process chamber. Internally designated as a “(C2)SI TOP RING”, it is the uppermost silicon ring in the electrode and confinement stack, encircling the gas-distribution and upper-electrode hardware that faces the wafer across the plasma gap. In tool families that pair an AMAT silicon top ring with TEL-style 300 mm etch chambers, this component forms part of the plasma-facing boundary at the top of the discharge volume rather than at the wafer edge.
Because it is fabricated from high-purity silicon, the top ring is intended to be chemically and electrically compatible with the silicon wafer and the silicon upper electrode it surrounds. It is a sacrificial, plasma-exposed surface: it erodes slowly under fluorine- and oxygen-bearing chemistries so that it can be replaced on a planned schedule, protecting more expensive structural and RF hardware behind it. Its condition has a direct bearing on plasma symmetry, on the particle budget reaching the wafer and on the repeatability of etch results from chamber to chamber.
Although physically simple, the top ring is a precision consumable. Its flatness, inner and outer diameters, thickness and surface finish are controlled to maintain a defined gap geometry and a consistent dielectric and conductive boundary at the top of the chamber. Even modest dimensional drift or surface roughening shifts the local plasma density and the way reactive species are delivered to the wafer, which is why fabs treat it as a scheduled-replacement item rather than a run-to-failure part.
The top ring performs several overlapping duties at the upper boundary of the plasma. It is simultaneously a confinement surface, a sacrificial silicon source and a geometric reference that helps define the discharge volume above the wafer.
As a silicon consumable, the top ring is selected and qualified principally on material purity, microstructure and surface integrity. These attributes determine how it erodes, how it influences plasma chemistry and how few particles it sheds into the process.
High-purity silicon is used so that erosion products are chemically benign within a silicon-based process and do not introduce metallic or otherwise mobile contaminants onto the wafer. Controlled microstructure and purity give a predictable, gradual erosion rate, which is what allows the ring to be scheduled out at fixed RF-hour or wafer-count intervals.
Flatness, diameters, thickness and surface finish are held to tight tolerances so the ring seats correctly and reproduces the intended gap and confinement geometry. A smooth, clean machined surface reduces nucleation sites for deposits and limits the particles released as the ring erodes and is cycled through temperature and plasma exposure.
Because the top ring shapes the plasma boundary and contributes to chemistry control, its condition propagates directly into process results and device yield. A worn, eroded or contaminated ring is a frequent root cause behind drifting etch performance and particle excursions.
The dominant wear mechanism is gradual erosion of the silicon surface under ion bombardment and chemical attack. Over thousands of RF hours the ring thins and its plasma-facing edges round off, slowly altering the confinement geometry until process parameters can no longer be held within specification.
Process by-products and polymer films accumulate on cooler or recessed surfaces of the ring. As these deposits thicken and are cycled thermally, they crack and flake, becoming a particle source. Roughened, eroded silicon also sheds particulate directly, both of which threaten defect performance on the wafer.
Silicon is hard but brittle. Thermal cycling, mechanical over-constraint during installation, or a careless handling event can chip an edge or crack the ring. Cracks compromise confinement, accelerate local erosion and can release fragments into the chamber, so any chip or fracture warrants immediate replacement.
Replacement should follow the OEM service procedure for the specific chamber and be performed by trained technicians under appropriate cleanroom and ESD discipline. The following sequence summarises good practice and is not a substitute for the tool’s documented maintenance instructions.
Silicon top rings are scheduled-wear items, so availability and consistency matter as much as unit price. Sourcing them through ESCT Fab Support lets fabs keep etch chambers matched and productive without over-committing capital to OEM-only supply lines.
It is a high-purity silicon consumable at the top of the plasma etch chamber that encircles the upper-electrode and gas-distribution hardware. It helps confine the discharge, presents a sacrificial silicon surface that participates in fluorine management, and maintains the geometry that supports symmetric RF coupling and uniform etch results.
No. This item is supplied as a new, second-source, OEM-compatible part. It is not an original AMAT-branded component, but it is manufactured and verified to match the form, fit and function of OEM P/N 0200-03559K so it can be installed in place of the original.
Replacement intervals are process-dependent and are typically defined by accumulated RF hours, wafer count or measured erosion. Fabs usually fold the top ring into the chamber’s preventive-maintenance schedule and replace it before erosion or particle performance drifts outside specification rather than waiting for failure.
High purity means that as the ring erodes it does not introduce metallic or mobile contaminants onto the wafer, and that its erosion products remain compatible with silicon-based etch chemistries. Controlled purity and microstructure also give the predictable wear rate that makes scheduled replacement reliable.
The current lead time is approximately 4-5 weeks. Because the top ring is a scheduled-wear consumable, we recommend planning orders against your maintenance calendar and holding suitable buffer stock so chamber service is never delayed waiting on parts.
Match the AMAT OEM part number 0200-03559K against your chamber’s spare-parts documentation, and contact the ESCT Fab Support team with your tool configuration. We will help verify compatibility before you commit to an order to avoid mis-application.
The AMAT Silicon Top Ring (OEM P/N 0200-03559K, ESCT P/N ES1099-006) is a high-purity silicon consumable that defines the plasma boundary at the top of a 300 mm plasma etch chamber. By confining the discharge, contributing sacrificial silicon to chemistry control and maintaining a precise confinement geometry, it underpins etch uniformity, particle performance and chamber matching. As a scheduled-wear part it is best managed through planned replacement and dependable supply, both of which ESCT Fab Support is positioned to provide as a verified, competitively priced second source.
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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