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The Silicon Insert Ring is a plasma-facing silicon consumable that occupies the annular region surrounding the wafer pocket inside a 300 mm plasma etch process chamber. Identified by Applied Materials part number 0200-03555K-SI and stocked by ESCT Fab Support as ES1099-009, it forms part of the silicon hardware set that defines the chamber’s etch environment at the critical boundary between the wafer edge and the surrounding chamber furniture. The “SI” designation in the part number confirms a high-purity silicon body rather than a quartz, alumina or yttria variant, and the insert ring geometry indicates a piece that nests into a carrier or seat rather than standing as a free, self-supporting ring.
In a capacitively coupled etch chamber, silicon is chosen as a plasma-facing material precisely because it is chemically congruent with the silicon being processed on the wafer. Components such as this insert ring help present a continuous, predictable silicon surface to the plasma immediately outboard of the wafer, so that the chemistry, ion flux and electrical conditions experienced by the outermost dies match those at wafer centre as closely as physics allows. The ring sits within the wider consumable kit alongside focus and edge rings, cover rings and silicon electrode hardware, and it is consumed gradually by the same fluorine- or chlorine-based plasmas that perform the etch.
Because it occupies the edge exclusion zone, the Silicon Insert Ring exerts an outsized influence on edge-of-wafer results relative to its modest size. A worn, eroded or mismatched ring is one of the most common root causes of edge etch-rate drift, edge tilt and elevated particle counts, which is why fabs treat it as a scheduled-replacement item rather than a fit-and-forget structural part.
The insert ring performs several overlapping duties at the wafer edge, simultaneously shaping the plasma sheath, conducting RF return current and providing a sacrificial silicon surface that protects more expensive hardware beneath it. Its specific functions include:
As a silicon consumable, the insert ring is selected and qualified on the basis of its material purity, crystalline or polycrystalline structure and dimensional precision. These properties determine both how the ring behaves in the plasma and how predictably it erodes over its service life.
High-purity silicon is used so that erosion products are chemically identical to the wafer substrate and the chamber’s normal by-product chemistry, avoiding the introduction of foreign metallic contaminants. Tight control of bulk resistivity and trace-metal content matters because the ring carries RF current and any conductivity variation alters the local electrical environment at the wafer edge.
During processing the ring is exposed to elevated temperatures, repeated thermal cycling and continuous ion bombardment. Dimensional tolerances on the seat diameter, ring height and the step that faces the wafer are held tightly because even small deviations shift the sheath profile and gas-flow symmetry at the edge.
Because it governs the edge environment, the condition of the Silicon Insert Ring feeds directly into device yield at the wafer periphery, where a disproportionate number of die sites sit on a 300 mm wafer. The practical consequences of ring condition include:
The dominant wear mode is gradual erosion of the silicon surface by reactive species and ion bombardment. As the ring recedes, the step relative to the wafer edge changes, the sheath profile shifts and edge etch results drift until the part falls outside its qualified process window and must be replaced.
Silicon is hard but brittle, so thermal stress, mishandling or a poor seat can initiate cracks or edge chips. These defects are particularly damaging because liberated silicon fragments become particles, and a fractured ring can no longer present a uniform surface or carry RF current evenly.
Polymer and etch by-products accumulate on the ring over time. If build-up flakes during processing it releases particles onto the wafer, and contaminated or discoloured surfaces can also alter local secondary-electron emission and RF coupling, contributing to edge non-uniformity even before the silicon is fully consumed.
Replacement should be carried out by trained personnel following the tool owner’s published maintenance procedure, in a clean environment and with the chamber safely vented and isolated. The following sequence reflects good general practice for an edge silicon consumable:
Silicon edge consumables are scheduled-replacement items, so availability and consistency matter as much as unit price. Sourcing ES1099-009 through ESCT Fab Support gives fabs a managed alternative to single-channel OEM supply:
It presents a high-purity silicon surface at the wafer edge, shaping the plasma sheath, carrying RF return current and acting as a sacrificial barrier that protects the hardware beneath it. In doing so it controls edge etch uniformity and particle performance.
No. ES1099-009 is supplied as a 2nd-source new, OEM-compatible component verified to the form, fit and function of AMAT OEM P/N 0200-03555K-SI. It is not an original OEM part and is not sold as one; the OEM reference is provided solely for cross-identification.
It is manufactured from high-purity silicon, as indicated by the “SI” suffix in the part number. Silicon is chosen so that erosion products remain chemically compatible with the wafer and the chamber’s process chemistry while providing a controlled, conductive plasma-facing surface.
Replacement is normally driven by accumulated RF-hours or wafer count, supported by visual inspection for recession, chipping or heavy deposition and by process indicators such as drifting edge etch rate or rising particle counts. Follow the tool owner’s qualified part-life limits.
The typical lead time is 4-5 weeks. Because this is a recurring consumable, we recommend aligning orders with planned preventive-maintenance cycles and holding a buffer stock to avoid unplanned chamber downtime.
When seated correctly and verified through the normal conditioning and qualification recipes, the ring is intended to restore baseline edge behaviour. Consistent material and dimensions between deliveries help maintain matching across a multi-chamber fleet.
The Silicon Insert Ring (OEM P/N 0200-03555K-SI, ESCT P/N ES1099-009) is a high-purity silicon edge consumable that governs sheath shaping, RF return and sacrificial protection at the wafer boundary of a 300 mm plasma etch chamber. Its condition has a direct bearing on edge etch uniformity, profile control, particle counts and edge die yield, which makes disciplined inspection and scheduled replacement necessary. Supplied by ESCT Fab Support as a 2nd-source new part with a 4-5 week lead time, it offers a cost-effective, consistently specified alternative for fabs managing the recurring consumable demand of an etch fleet.
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 0200-03555K-SI. 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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