OEM P/N:
ESCT P/N:
PART TYPE:
OEM:
The LAM Hot Edge Ring is a thermally engineered annular consumable that sits immediately outboard of the 300 mm wafer in a plasma etch chamber, forming the heated boundary between the active wafer surface and the surrounding chamber hardware. As an edge ring it extends the electrical and thermal profile of the wafer beyond the substrate diameter, but its defining characteristic, and the reason it is designated a “hot” ring, is that it is held at an elevated, deliberately controlled temperature during processing rather than being allowed to drift with passive plasma heating. That managed thermal state is what stabilises chemistry and etch behaviour across the most sensitive few millimetres of the wafer.
In a modern high-density etch process, the wafer edge is where uniformity is most difficult to maintain. Electric field lines bend at the substrate perimeter, gas residence time changes, and the temperature gradient steepens as heat leaks into cooler surrounding parts. The hot edge ring counters this by presenting a consistent, sacrificial surface at a known temperature so that the plasma sheath, ion trajectories and surface reaction rates behave at the edge much as they do at wafer centre. It protects the underlying chuck and lift hardware from direct ion bombardment while quietly governing edge etch rate, profile angle and critical dimension control.
Because it is consumed by the same energetic plasma it helps to confine, the hot edge ring is a scheduled-replacement item. Its condition tracks directly into device yield at the wafer edge, where an increasing share of printed die now resides, making timely, qualified replacement a core part of any 300 mm etch maintenance programme.
Within a LAM 300 mm etch chamber the hot edge ring performs several overlapping duties at once, blending thermal management, electrical shaping and physical protection into a single sacrificial component that surrounds the electrostatic chuck and the wafer it carries.
A hot edge ring must survive aggressive halogen and fluorocarbon plasmas while holding a stable elevated temperature and predictable electrical character throughout its service life. Material selection and thermal design therefore determine both how long the ring lasts and how cleanly it performs across that life.
Edge rings of this class are produced from process-matched materials such as high-purity silicon, silicon carbide or fine-grain technical ceramics, chosen so that their erosion products are compatible with the process and do not introduce metallic or particulate contamination. The exposed face erodes gradually and predictably under ion sputtering and chemical attack, which is the intended sacrificial behaviour, but the material must wear evenly without flaking, micro-cracking or selective grain loss that would shed defect-generating particles onto the wafer edge.
As a hot ring, the part is engineered to reach and hold a target temperature through conduction from heated chuck hardware and absorbed plasma energy, with its thermal mass and contact interface tuned so the edge reaches steady state quickly and stays there. Stable, repeatable heat transfer across the seating interface has to be even, variation in contact resistance translates directly into edge temperature drift, and therefore into etch rate and profile variation at the wafer perimeter.
Because so much printed die now sits within the outer annulus of a 300 mm wafer, the condition of the hot edge ring has an outsized effect on usable yield and on the tool’s ability to hold process specification over time.
The hot edge ring is designed to wear, but the way it wears and the point at which it must be retired both demand attention. Three failure mechanisms dominate in practice.
Continuous ion bombardment and chemical attack gradually thin the exposed face and round its inner edge. As material is lost the local field shaping and plasma confinement shift, edge etch rate drifts and profiles begin to tilt. Beyond a defined erosion limit the ring can no longer hold the edge process within specification and must be replaced regardless of remaining bulk thickness.
Repeated heating and cooling cycles, combined with the thermal stress of running hot, can initiate micro-cracks or surface flaking, particularly where erosion has already weakened the material. These defects shed particles directly into the wafer edge region, driving up defect counts and, in severe cases, producing visible chips that contaminate the chamber and demand an immediate stop.
Build-up of polymer or etch by-products on the seating interface, or warping and wear of the contact surface, degrades heat transfer between the ring and its heated seat. The ring then fails to reach or hold its target temperature, causing edge etch instability that can be mistaken for a process drift rather than a worn consumable, a reminder to inspect the interface, not just the exposed face.
Hot edge ring replacement is a routine but precision task that should follow the documented LAM procedure for the specific chamber. The sequence below summarises good practice; always defer to the tool’s controlled work instruction and safety requirements.
Hot edge rings are high-turnover consumables, so a dependable second source protects both budget and uptime. ESCT Fab Support supplies ES2099-050 as a qualified alternative to the OEM ring, helping fabs reduce cost and de-risk supply without compromising edge performance.
It surrounds the 300 mm wafer and is held at a controlled elevated temperature so that etch chemistry, ion behaviour and reaction rates at the wafer edge match the centre. In doing so it stabilises edge uniformity and profile control while protecting the chuck and ground hardware from plasma erosion.
No. ES2099-050 is a second-source, brand-new component supplied as an OEM-compatible alternative to LAM OEM P/N DB-716-443086-401-H. It is manufactured to match the original ring’s form, fit and function but is not an original OEM part and is not sold as one.
The “hot” designation reflects that the ring is deliberately held at an elevated, managed temperature during processing instead of floating with passive plasma heating. That controlled thermal state is central to keeping edge etch rate and feature profiles stable across the wafer perimeter.
Replacement is usually driven by accumulated process time or wafer count against a qualified erosion limit, supported by trends in edge uniformity, profile and particle data. Visible thinning, edge rounding, cracking or flaking, or unexplained edge process drift, all indicate the ring should be retired.
Typical lead time is 4-5 weeks. Because hot edge rings are consumed on a predictable cadence, most fabs hold buffer stock sized to their replacement interval and reorder against forecast usage so a fresh ring is always on the shelf before the installed one reaches its limit.
It should not when the part is correctly matched and installed. ES2099-050 is built to the original dimensional, material and thermal characteristics, and standard practice is to requalify the chamber with edge uniformity and particle checks after any ring change, so performance and chamber-to-chamber matching can be confirmed before production.
The LAM Hot Edge Ring (OEM P/N DB-716-443086-401-H), supplied by ESCT Fab Support as ES2099-050, is a temperature-controlled sacrificial consumable that governs the wafer edge environment in 300 mm plasma etch chambers. By holding the perimeter at a stable elevated temperature, shaping the field and plasma confinement, and shielding the chuck and ground hardware, it directly protects edge uniformity, profile control and particle performance, the factors that most influence yield in the outer die. As a managed-wear item subject to erosion, thermal cracking and seating degradation, it benefits from disciplined replacement and requalification, and from a cost-effective, qualified second source that keeps tools running without compromise.
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 DB-716-443086-401-H. 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.
Fill out the form below to request a quote for the part/s you require, making sure to include the OEM part number.
If the part you are looking for is not listed, get in touch and we will try to source it for you through our wide network of partners and suppliers.
We use cookies We use analytics cookies to see how visitors use this site, so we can improve it. They are set only if you accept. Read our Cookie Policy.
