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The Hot Edge Ring is a plasma-facing consumable that surrounds the wafer at the outermost perimeter of a 300 mm plasma etch chamber. Sitting concentrically just outboard of the wafer edge, it extends the electrical and thermal boundary of the chuck assembly beyond the silicon so that the plasma sheath, electric field and gas flow do not collapse abruptly at the wafer edge. The “hot” designation reflects its operating regime: unlike a passively cooled outer ring, the hot edge ring runs at an elevated, controlled temperature so that polymer deposition, etch by-product condensation and edge etch rate behave predictably across the consumable’s service life.
In production, the edge of the wafer is the single hardest region to keep within specification. The transition from the conductive, RF-coupled wafer to the surrounding hardware creates discontinuities in sheath thickness, ion trajectory and local temperature, and these discontinuities translate directly into edge die loss. The hot edge ring exists to smooth that transition, presenting the plasma with a continuous, repeatable surface so that the last few millimetres of the wafer etch at the same rate, profile and selectivity as the bulk.
Because it is exposed to direct ion bombardment, reactive radical chemistry and thermal cycling, the hot edge ring is a scheduled-replacement consumable. Its condition governs edge-of-wafer uniformity, particle counts and chamber-to-chamber matching, which is why fabs hold ready stock of qualified rings such as this ESCT-supplied second-source unit, OEM P/N 716-023013-007.
The hot edge ring performs several coupled electrical, thermal and chemical functions simultaneously. It is not merely a mechanical shroud; it is an active part of the plasma environment and the RF circuit at the wafer periphery.
Edge-ring performance is dictated by material selection and dimensional stability under sustained plasma exposure. The right material balances plasma resistance, electrical character and thermal conductivity so that the ring holds its function as it erodes.
Hot edge rings for 300 mm etch are manufactured from high-purity plasma-grade materials such as silicon, silicon carbide, quartz or fine-grained ceramics, selected to match the resistivity and chemical compatibility the etch recipe demands. The material must resist fluorine- and chlorine-based chemistries, withstand energetic ion bombardment and erode in a slow, predictable manner without spalling or generating particles. Purity is critical: trace metallic content can transfer to the wafer edge and degrade device yield.
Because the ring runs hot by design, its thermal conductivity and emissivity must be matched to the chamber’s heating and the surrounding hardware so that the edge thermal gradient stays repeatable. Equally, the ring’s resistivity influences how RF current couples at the wafer edge; a ring that drifts electrically as it wears will shift the edge etch rate. Tight dimensional and material control keeps both the thermal and electrical boundary conditions consistent across the part’s life and from chamber to chamber.
As a perimeter consumable, the hot edge ring exerts an outsized influence on edge-of-wafer results and overall chamber health. Its condition is one of the first variables engineers examine when edge yield or particle performance drifts.
The primary wear mode is gradual erosion of the upper surface under continuous ion bombardment. As the ring thins, the height relationship between the ring top and the wafer surface changes, altering the local sheath and tilting ions at the edge. This manifests as a progressive shift in edge etch rate and profile, eventually pushing the outermost die out of specification and forcing replacement.
Repeated heating and cooling, combined with mechanical clamping and handling, can initiate micro-cracks that propagate into chips or fractures. A cracked hot edge ring is a serious particle source and can disturb both the thermal profile and the RF return path. Thermal-shock damage is most common during aggressive recipes, rapid temperature transitions or careless installation.
Etch by-products and polymer can accumulate on and around the ring, especially if the surface temperature drifts below its target. Flaking deposits generate particles, and contaminated surfaces shift the local chemistry and emissivity. Build-up also degrades the seating interface, which can compromise both thermal contact and the electrical boundary the ring is meant to provide.
Hot edge ring replacement is a routine preventive-maintenance task, but it must be carried out with cleanroom discipline because the part sits at the heart of the plasma environment. Always follow the OEM service procedure and your fab’s specific PM checklist; the steps below summarise the general sequence.
Edge rings are scheduled consumables, so availability and qualification matter as much as the part itself. Sourcing rings such as ES2099-028 through ESCT Fab Support gives engineering and procurement teams a dependable, cost-managed supply channel without compromising on form, fit and function.
It surrounds the wafer at the outermost edge and extends the plasma sheath, electric field and controlled thermal boundary beyond the silicon. By smoothing the transition from wafer to hardware, it keeps ion incidence vertical and etch behaviour uniform at the edge die, while protecting underlying chuck and electrode hardware from erosion.
No. This is a second-source, new part supplied as an OEM-compatible replacement. It is manufactured and verified to match the original form, fit and function of OEM P/N 716-023013-007, but it is not an original LAM part and carries no OEM branding or warranty.
The “hot” designation refers to its controlled elevated operating temperature. Running the ring warm stabilises polymer deposition and etch by-product behaviour at the wafer periphery, which keeps edge etch rate and particle performance repeatable compared with a passively cooled outer ring.
Replacement is typically triggered by an accumulated erosion budget, a measurable drift in edge-of-wafer critical dimension or profile, rising edge particle counts, or visible chipping and cracking during inspection. Most fabs schedule the swap as part of a planned PM rather than waiting for an excursion.
As with any plasma-facing consumable, the chamber should be conditioned or seasoned and the edge-uniformity qualification re-run after installation, in line with your fab’s PM procedure. Because the part is matched to original dimensions and material character, it is designed to qualify cleanly within normal limits.
The standard lead time is 4-5 weeks. Because edge rings are consumed on a predictable schedule, we recommend holding buffer stock sized to your PM cadence and reordering against forecast wear so that a qualified ring is always on the shelf when the chamber is due.
The LAM Hot Edge Ring (OEM P/N 716-023013-007, ESCT P/N ES2099-028) is a plasma-facing perimeter consumable that controls edge-of-wafer etch uniformity in 300 mm plasma etch chambers. By extending the sheath, holding a controlled elevated temperature and presenting a continuous electrical and chemical boundary at the wafer edge, it protects edge die yield, manages particle performance and shields costly chuck and electrode hardware. Supplied by ESCT Fab Support as a second-source, new part verified to form, fit and function with a 4-5 week lead time, it offers a dependable, cost-effective route to keeping etch chambers in qualified production.
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 Lam Research part number 716-023013-007. It is not an original OEM part and is not sold as one. It is not manufactured by, endorsed by, or affiliated with Lam Research, and all manufacturer names and part numbers are quoted for identification and compatibility purposes only.
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