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The Silicon Hot Edge Ring carrying LAM OEM part number 716-023013-020 is a precision-machined silicon consumable that sits at the outer perimeter of the electrostatic chuck assembly in a 300 mm plasma etch chamber. It encircles the production wafer, occupying the annular gap between the wafer edge and the surrounding ground or quartz hardware. The “hot” designation refers to its thermal and electrical state during processing: rather than being held at the cool, clamped temperature of the wafer, this ring runs at an elevated, deliberately managed temperature because it is exposed directly to plasma without the benefit of backside helium clamping across its full area. This thermal behaviour is central to how it shapes the plasma sheath at the wafer edge.
In a 300 mm etcher, the few millimetres of radius nearest the wafer edge are the hardest region of the wafer to keep on specification. Electric field lines distort where the conductive silicon wafer ends and the surrounding hardware begins, and without a properly engineered edge ring the plasma sheath bends, ion trajectories tilt, and etch rate and feature profile drift away from the centre-of-wafer target. The hot edge ring extends the effective electrical and thermal surface of the wafer outward, so that the wafer’s own edge sees a more uniform, vertical sheath. It is a sacrificial component by design, eroding steadily so that the wafer does not have to absorb that damage.
Because it is fabricated from silicon, the same base material as the wafer itself, the ring is chemically matched to the etch process. It consumes the same fluorine, chlorine or bromine chemistries the wafer sees, contributes only silicon-bearing species to the plasma if it sputters, and avoids introducing foreign metals or contaminants that would poison device yield. As a wear part exposed continuously to ion bombardment, it is one of the most frequently replaced items in the chamber preventive maintenance kit.
The hot edge ring performs several overlapping electrical, thermal and process-control functions simultaneously. None of these is incidental; each directly affects how many die at the wafer edge survive to final test. Its principal roles include the following:
The performance of a hot edge ring is governed almost entirely by the grade, purity and surface finish of the silicon it is machined from, together with the dimensional precision of its profile. Two distinct performance dimensions matter here: the intrinsic material behaviour and the geometric and electrical fit within the chamber stack.
The ring is produced from high-purity silicon selected to match the resistivity and erosion characteristics the chamber recipe expects. Material quality directly determines particle generation and useful life:
The ring must seat repeatably and present the correct height relative to the wafer plane, because edge electrical behaviour is extremely sensitive to small geometric changes:
The condition of the hot edge ring is one of the strongest single levers on edge die yield and chamber stability. As it wears, the edge electrical environment changes continuously, and the consequences propagate through process results and tool availability:
As a sacrificial silicon part under constant ion bombardment, the hot edge ring fails through predictable, monitorable mechanisms. Understanding them allows preventive replacement before edge yield is compromised.
The dominant wear mode is gradual loss of silicon to physical sputtering and chemical etching. As the ring thins and its profile recedes, the wafer-edge sheath progressively flattens then collapses, shifting edge etch rate and ion angle. This is normal, expected wear and is the basis for the ring’s scheduled replacement interval, typically tracked by accumulated RF hours or processed wafer count.
Prolonged exposure roughens and micro-pits the silicon surface and can leave loosely adherent etch residue. These features eventually shed as particles that land on the wafer as killer defects. A sharp rise in edge particle counts or defect-map signatures at the wafer perimeter is a classic indicator that the ring has passed the end of its useful life.
Silicon is brittle, and the steep thermal gradients of the “hot” operating state combine with mechanical handling stress to create a risk of cracking or chipping. Mishandling during installation, an over-torqued or uneven seat, or thermal shock can fracture the ring, producing immediate large-particle contamination and a sudden, severe shift in edge process behaviour.
The hot edge ring is replaced during scheduled preventive maintenance. Because silicon is fragile and edge performance is sensitive to seating, the procedure should follow the tool owner’s qualified PM instructions. A representative sequence is as follows:
Hot edge rings are high-frequency consumables, so a reliable second-source supply protects both budget and uptime. ESCT Fab Support supplies the ES2099-001 ring as a verified alternative to the LAM OEM item, with the following advantages:
It surrounds the production wafer at the chuck perimeter and extends the wafer’s effective electrical and thermal surface outward. This keeps the plasma sheath flat and the ion flux vertical at the wafer edge, so etch rate, critical dimension and profile remain on target across the outermost die. It also erodes sacrificially in place of the wafer and chamber hardware.
No. This is a second-source, new part supplied by ESCT Fab Support as an OEM-compatible equivalent. It is manufactured and verified to match the form, fit and function of LAM OEM P/N 716-023013-020, but it is not an original LAM-branded component and is not sold as one.
The “hot” label reflects its thermal and electrical operating state. Unlike the wafer, which is clamped and cooled, this ring runs at an elevated, managed temperature because it faces the plasma without full backside cooling. That deliberate thermal condition is part of how it tunes the edge sheath, and it is why careful cooling before handling is important during maintenance.
Replacement is usually scheduled against accumulated RF hours or processed wafer count, then confirmed by inspection and process data. Warning signs include drifting edge etch-rate uniformity, increasing profile tilt or critical-dimension variation at the wafer edge, rising edge particle counts, and visible thinning, roughening or pitting of the silicon surface.
It is machined from high-purity silicon, chemically matched to the wafer and to the fluorine-, chlorine- and bromine-based etch chemistries used in the chamber. Using silicon keeps contamination low, since any sputtered material is silicon-bearing rather than a foreign metal that could poison device yield.
The ES2099-001 is supplied new from a second source, with a typical lead time of 4-5 weeks. Because it is a recurring consumable, many fabs hold buffer stock and place orders against their PM schedule so a verified replacement is always on the shelf.
The Silicon Hot Edge Ring (LAM OEM P/N 716-023013-020, ESCT P/N ES2099-001) is a high-purity silicon consumable that governs plasma sheath shape, ion-flux verticality and thermal conditions at the wafer edge in 300 mm plasma etch chambers. By extending the wafer’s effective surface and eroding sacrificially, it preserves edge etch uniformity, profile control and particle performance, directly protecting outer-die yield. As a frequently replaced wear part, it benefits from a dependable, cost-effective second source. ESCT Fab Support offers the ES2099-001 as a new, form-fit-function-verified alternative with a 4-5 week lead time to support planned maintenance and consistent chamber performance.
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 716-023013-020. 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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