OEM P/N:
ESCT P/N:
PART TYPE:
OEM:
The ESC filter board is a printed circuit assembly that sits in the electrostatic chuck (ESC) supply path of LAM Research plasma process tools. Its job is to condition and protect the high-voltage clamping signal that holds the wafer flat against the chuck surface, while simultaneously isolating the sensitive DC clamp electronics from the radio-frequency (RF) energy that floods the process chamber during etch and deposition. In practical terms, the board is the electrical buffer that allows a clean, stable clamping voltage to reach the chuck even though the chuck itself is a live RF electrode.
Mounted within the ESC power and control assembly, typically close to the chamber feedthrough or inside the chuck supply enclosure, the board carries filtering networks, blocking and bypass components, bleed paths and protection devices arranged to pass the comparatively slow DC clamp signal while shunting and attenuating the fast RF currents that would otherwise corrupt measurement, damage the supply, or create an arc hazard. Because the ESC clamp directly governs wafer flatness and backside helium cooling, anything that degrades this filtering shows up almost immediately as a process or yield problem.
For fabs running ageing LAM platforms, the ESC filter board is exactly the kind of low-cost, high-consequence component that is easy to overlook until a chamber refuses to clamp. Carrying a verified OEM-compatible spare such as ESCT P/N ES2022-120 keeps a known electrical failure point out of the critical path and turns a multi-day outage into a planned swap.
The board is best understood as the electrical gatekeeper between the ESC high-voltage supply and the chuck electrode. It must let the right signals through, block the wrong ones, and fail safe rather than fail dangerous. Within a LAM etch or deposition module it typically performs the following functions:
Electrostatic clamping relies on a stable high-voltage potential, so the board is laid out with generous creepage and clearance, conformal-grade laminate quality and high-voltage-rated passive components. Filter capacitors must hold their rated working voltage without leakage, and the dielectric of the board itself must resist surface tracking in an environment that can see moisture, process residue and thermal cycling. Any erosion of these margins translates directly into unstable clamping.
Because the chuck doubles as an RF-coupled electrode, the board must present a low impedance to RF (shunting it to ground) while presenting a high impedance to RF looking back toward the DC supply. This is achieved with bypass capacitors, blocking elements and carefully managed grounding so that the clamp supply sees a clean DC node and the chamber sees a clean RF return. Poor RF management here causes noise on the clamp reading, supply stress and intermittent faults.
The ESC filter board has an outsized influence on process results relative to its size, because the clamp it conditions controls both wafer position and wafer temperature. When the board degrades, the consequences propagate quickly through the process module:
Sustained high potential combined with surface contamination or absorbed moisture can initiate carbonised tracks across the laminate, eventually leading to flashover. Capacitors operating near their voltage rating can also break down internally, collapsing the clamp voltage or causing a hard short.
Continuous RF exposure heats and ages bypass and blocking components. As capacitance values drift or solder joints fatigue, RF isolation degrades, allowing chamber energy to feed back into the supply and producing intermittent, hard-to-trace faults that worsen over time.
Repeated thermal cycling loosens terminations and cracks solder joints, raising contact resistance and creating local hot spots. A single chamber arc event can scorch traces or pads, and once an arc path is established the board rarely recovers reliable performance and should be replaced.
Because this board carries high voltage and connects to an RF electrode, replacement must follow strict lockout and discharge procedures. The sequence below is a general guide; always work to the relevant LAM service documentation and your site’s safety procedures.
An ESC filter board failure can idle an entire chamber, yet the part is small and inexpensive to stock relative to the cost of lost production. ESCT Fab Support helps fabs keep these electrical wear points covered with a pragmatic sourcing approach:
It conditions the electrostatic chuck supply path: passing the DC clamping voltage to the chuck while filtering and shunting chamber RF energy away from the supply and control electronics. This keeps wafer clamping stable and protects sensitive circuits from RF feedback and transients.
No. It is supplied as an OEM-compatible replacement (sourced as OEM used or second-hand new) and is not an original OEM part. It cross-references to LAM OEM P/N 810-190082-001 and is verified to the same form, fit and function.
Common symptoms include unstable or low clamp voltage, clamp-related interlock faults, noisy clamp-voltage readings, wafers that fail to de-clamp cleanly, or visible arc/scorch marks on the board. Temperature and etch-rate non-uniformity on processed wafers can also point back to clamp instability.
The typical lead time is four weeks. Holding a unit as a planned spare is recommended, since an unexpected clamp-circuit failure can take a chamber offline until a replacement arrives.
Yes. The board carries high voltage and connects to an RF electrode, so the supplies must be locked out and the clamp circuit verified discharged before any handling. Correct grounding of the RF return and properly torqued HV connections give safe, reliable operation.
Yes. Provide your platform details and ESC supply configuration and our technical team will confirm that ES2022-120 matches your application before you order, minimising the risk of an incompatible fit.
The ESC filter board (LAM OEM P/N 810-190082-001, ESCT P/N ES2022-120) is a compact but critical printed circuit assembly in the electrostatic chuck supply path of LAM plasma process tools. By delivering a clean DC clamping voltage while filtering chamber RF energy, it underpins wafer flatness, backside cooling and process uniformity. Its failure modes, high-voltage breakdown, RF-induced component drift and arc or connector damage, are well understood and best mitigated by holding a verified spare. Sourcing an OEM-compatible replacement through ESCT Fab Support keeps this high-consequence failure point covered and protects chamber availability and yield.
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 810-190082-001. 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.
