0200-03559K
(C2)SI TOP RING(MID)

Silicon top ring, mid section (OEM P/N 0200-03559K), plasma-facing silicon confinement ring for AMAT-compatible TEL 300 mm etch systems

ESCT P/N ES1099-011 – 2nd source NEW silicon top ring (mid) for 300 mm plasma etch process chambers

The Silicon Top Ring (mid section), carried under AMAT OEM part number 0200-03559K and ESCT part number ES1099-011, is a high-purity silicon consumable that sits in the upper region of a 300 mm plasma etch process chamber. Identified in tool documentation by its “C2” chamber-position designation and its “MID” placement, this component forms part of the ring stack that surrounds the upper electrode and helps to bound the plasma envelope above the wafer. It is a sacrificial, plasma-facing part: it is deliberately consumed over the course of normal operation so that more expensive structural and electrode assemblies are protected.

In a Tokyo Electron (TEL) 300 mm etch chamber, silicon rings of this class perform a dual role. Mechanically, the top ring locates and shields the periphery of the upper electrode region; electrically and chemically, the silicon material participates in the discharge by acting as a controlled source of silicon into the fluorine- and oxygen-bearing plasmas typical of dielectric and silicon etch recipes. Because it is fabricated from the same base material family as the wafers and the silicon cathode/electrode hardware, it minimises foreign-species contamination while helping to stabilise the chemistry seen at the wafer.

As a mid-position ring within a multi-piece confinement stack, the part contributes to plasma confinement, RF return continuity through the upper assembly, and gas/by-product flow conditioning around the chamber perimeter. Its dimensional accuracy, flatness and surface finish directly influence how repeatably the plasma is bounded from chamber to chamber and from preventive-maintenance cycle to cycle, which is why it is treated as a yield-critical consumable rather than a generic spacer.

Functional role of the silicon top ring in AMAT-compatible TEL etch platforms

The silicon top ring is engineered to integrate into the upper electrode ring stack, where it simultaneously manages mechanical location, electrical continuity and plasma chemistry. Its principal functions within the process chamber include the following:

• Bounding and confining the plasma in the upper periphery of the chamber so that the discharge remains centred over the wafer and does not spread to unintended surfaces.
• Acting as a sacrificial silicon-bearing surface that participates in the etch chemistry, helping to scavenge reactive fluorine species and stabilise the radical balance at the wafer edge.
• Providing a continuous, low-contamination RF return and ground reference path through the upper electrode region of the chamber.
• Shielding higher-value structural and electrode hardware from direct ion bombardment, polymer deposition and chemical attack.
• Conditioning gas and etch by-product flow around the chamber perimeter to support uniform pumping and residence time.
• Maintaining repeatable, defined geometry at the top of the ring stack so that successive parts reproduce the same plasma boundary after each maintenance cycle.

Material and process performance

Performance of a plasma-facing silicon ring is dominated by the purity of the base material and by the precision of its machined and finished geometry. Both attributes must be controlled tightly because the part is in direct contact with an aggressive, energised plasma for its entire service life.

Silicon purity and plasma chemistry

High-resistivity, high-purity silicon is selected so that the ring erodes cleanly and predictably without introducing metallic or particulate contamination into the chamber. The controlled liberation of silicon into the discharge contributes to the recipe’s fluorine balance and helps maintain stable etch rates and selectivity at the wafer.

• High-purity silicon to minimise metallic contamination and on-wafer defectivity.
• Controlled resistivity to support consistent RF coupling and plasma behaviour.
• Predictable, uniform erosion that keeps chemistry stable across the part’s service life.
• Material compatibility with fluorine- and oxygen-based etch and clean chemistries.

Dimensional accuracy and surface finish

Flatness, concentricity and edge profile determine how precisely the ring seats in the stack and how cleanly it bounds the plasma. A controlled surface finish reduces local field concentration, limits micro-arcing and slows particle generation as the surface roughens with use.

• Tight flatness and concentricity for repeatable seating and plasma symmetry.
• Defined edge and chamfer geometry to manage field gradients at the ring boundary.
• Controlled surface finish to reduce arcing and particle shedding.
• Dimensional conformance to the OEM 0200-03559K envelope for drop-in interchangeability.

Impact on tool performance and yield

Although it is a consumable, the silicon top ring exerts a measurable influence on process results. As it wears, the plasma boundary and local chemistry shift, and uncontrolled or worn rings translate quickly into edge-of-wafer process drift and defect excursions. The consequences of a degraded or out-of-specification ring include:

• Drift in etch rate, selectivity and critical-dimension uniformity toward the wafer edge.
• Loss of plasma confinement and symmetry, leading to chamber-to-chamber mismatch.
• Increased particle counts and on-wafer defectivity from a roughened or cracked surface.
• Micro-arcing events that disturb the discharge and can damage adjacent hardware.
• Shortened time between cleans and reduced overall tool availability and yield.

Common wear and failure modes

Erosion and thinning

Continuous ion bombardment and chemical etching steadily remove silicon from the plasma-facing surfaces. As the ring thins, its profile changes, the plasma boundary moves, and edge process control degrades until the part reaches its erosion limit and must be replaced.

Cracking and chipping

Silicon is hard but brittle. Thermal cycling, repeated RF stress and rough handling during preventive maintenance can initiate micro-cracks that propagate into chips or fractures. Any liberated fragment is an immediate particle source and a defectivity risk to product wafers.

Surface roughening and polymer build-up

Over many cycles the surface roughens and accumulates etch-by-product and polymer films. These deposits can flake during plasma strikes or thermal transients, generating particles and altering local electrical behaviour, including a heightened tendency toward arcing at the ring edge.

Installation and replacement guidance

Replacement should be performed by a trained technician during a scheduled preventive-maintenance window, following the relevant tool procedure and contamination-control practice. A typical sequence is as follows:

• Place the chamber in a safe maintenance state, vent to atmosphere and confirm RF and gas systems are isolated and locked out.
• Open the chamber and document the condition of the existing ring stack before removing any parts.
• Carefully remove the worn silicon top ring, taking care not to chip the part or scratch the mating surfaces.
• Clean the seating area and adjacent hardware per the approved procedure, inspecting for residue, damage or arc marks.
• Handle the new ring with clean, powder-free gloves; inspect it for chips or cracks and seat it squarely without forcing.
• Reassemble the stack, verify correct seating and concentricity, then pump down and perform leak and integrity checks.
• Run chamber season/conditioning and qualification recipes, confirming process and particle performance before returning the tool to production.

Spare parts strategy for AMAT-compatible TEL etch consumables

Because plasma-facing silicon rings are consumed on a predictable cadence, holding qualified spares protects tool uptime. ESCT Fab Support supplies the silicon top ring (mid) under ES1099-011 as a cost-effective alternative to single-source OEM procurement, with a lead time of 4–5 weeks. Sourcing advantages include:

• A new, OEM-compatible part verified to the form, fit and function of AMAT 0200-03559K.
• Competitive pricing versus sole-source OEM channels, lowering cost of ownership per consumable cycle.
• A defined 4–5 week lead time to support planned preventive-maintenance scheduling.
• High-purity silicon construction selected for low contamination and predictable wear.
• Cross-referencing to both OEM and ESCT part numbers for straightforward inventory control.
• Knowledgeable support for 300 mm plasma etch consumable selection and planning.

Frequently asked questions

What does the silicon top ring (mid) actually do in the chamber?

It is a plasma-facing silicon consumable in the upper ring stack that helps bound and confine the plasma, provides a clean RF return path and supplies controlled silicon into the etch chemistry, all while shielding higher-value hardware from ion bombardment and chemical attack.

Is this an original OEM part?

No. This is supplied as a new, second-source, OEM-compatible part. It is manufactured to match the form, fit and function of AMAT 0200-03559K but is not an original OEM-branded component.

What does the “C2” and “MID” designation mean?

“C2” refers to a chamber-position identifier used in tool documentation, and “MID” indicates the part’s mid placement within a multi-piece top ring stack. These designations help technicians select the correct ring for the correct position during maintenance.

How often should the ring be replaced?

Replacement interval is recipe- and utilisation-dependent and should follow your fab’s preventive-maintenance plan. The ring is typically changed when erosion, particle performance or edge process metrics indicate it has reached its wear limit.

Why does ring condition affect wafer yield?

As the ring erodes or cracks, the plasma boundary and local chemistry shift, driving edge-of-wafer process drift, particle excursions and chamber mismatch. Maintaining the ring within specification keeps etch uniformity and defectivity under control.

What is the lead time for ES1099-011?

The current lead time is 4–5 weeks. We recommend stocking the part ahead of scheduled maintenance so that ring changes are never delayed by procurement.

Summary

The Silicon Top Ring, mid section (AMAT 0200-03559K, ESCT ES1099-011) is a high-purity, plasma-facing silicon consumable for 300 mm plasma etch chambers. It confines the plasma, supports a clean RF return, conditions chamber chemistry and protects higher-value hardware, all while wearing predictably as a sacrificial part. Because its purity and geometry directly influence edge etch uniformity, particle performance and chamber matching, keeping qualified spares on hand is central to protecting tool uptime and yield. ESCT Fab Support supplies this ring as a new, OEM-compatible alternative with a 4–5 week lead time.

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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