810-017086-002
ESC POWER SUPPLY

LAM ESC power supply (OEM P/N 810-017086-002), electrostatic chuck high-voltage supply for LAM Research plasma etch systems

ESCT P/N ES2022-075, high-voltage DC bias supply for electrostatic wafer clamping

The LAM ESC Power Supply (OEM P/N 810-017086-002) is the dedicated high-voltage source that energises the electrostatic chuck (ESC) inside LAM Research plasma etch and related process chambers. Where a mechanical clamp ring once held the wafer against the lower electrode, the ESC relies on a precisely regulated DC potential to generate the electrostatic clamping force that holds a 200 mm or 300 mm wafer flat and motionless throughout processing. This power supply is the unit that produces, regulates and switches that clamping potential, and its behaviour is directly coupled to wafer temperature control, plasma stability and ultimately device yield.

Physically, the assembly is an enclosed power electronics module containing a high-voltage generation stage, regulation and feedback circuitry, clamp and de-clamp control logic, and the interface connectors that route the output to the chuck and the control signals to the tool’s system controller. It sits within the tool’s electronics bay or mainframe power section rather than inside the vacuum envelope, but its output is electrically continuous with the chuck electrode embedded beneath the wafer. Because the clamping voltage typically runs to several hundred or low thousands of volts, the supply is built for tight regulation, low ripple and controlled ramp behaviour rather than raw power delivery.

For a fab running continuous etch campaigns, the ESC power supply is a quiet but critical node. When it drifts or fails, the symptoms appear downstream as wafer de-chuck faults, helium backside leak alarms, thermal non-uniformity and aborted lots. Holding a reliable spare such as ES2022-075 protects the tool against the kind of single-point failure that can idle an entire etch module for days.

Functional role of the ESC power supply in LAM plasma etch platforms

The ESC power supply does far more than simply apply a voltage. It manages the full clamp life cycle in coordination with the tool’s process sequencer, so the wafer is held securely while plasma is active and released cleanly at end of process. Its principal functions include the following:

• Generating a regulated high-voltage DC output to develop the electrostatic clamping force between the chuck electrode and the wafer.
• Supporting both monopolar and bipolar clamp schemes, applying the correct polarity and magnitude for the chuck type fitted to the chamber.
• Ramping the clamp voltage up and down on controlled profiles to avoid arcing, particle generation and wafer movement.
• Executing a defined de-clamp and charge-decay sequence so residual charge is neutralised before lift-pin actuation and wafer hand-off.
• Providing output current monitoring and clamp-status feedback to the system controller for interlock and fault handling.
• Maintaining a stable reference against the RF bias environment so the clamp potential is not disturbed by the plasma sheath.

Electrical and signal performance

As a high-voltage regulated supply operating beside an RF-driven electrode, the ESC power supply must combine clean output regulation with solid immunity to electrical noise. Two performance dimensions matter most: the quality of the high-voltage output itself, and the integrity of its control and feedback signalling.

High-voltage output quality

Clamping uniformity depends on a stable, low-ripple output held within tight tolerance across the clamp interval. The output stage and its regulation loop are designed to deliver predictable voltage with controlled ramp rates and minimal overshoot.

• Tight DC regulation to hold a consistent clamping force as wafer-to-chuck capacitance and plasma loading vary.
• Low output ripple and noise to prevent micro-modulation of the clamp force and associated backside helium pressure instability.
• Controlled slew on ramp-up and ramp-down to suppress arcing at the chuck dielectric and limit particle generation.
• Current limiting and short-circuit protection to safeguard the chuck and the supply during a dielectric breakdown event.

Control, feedback and RF immunity

The supply exchanges enable, clamp, de-clamp and status signals with the tool controller, and it must do so reliably in an environment saturated with RF energy and switching transients. Adequate filtering, shielding and grounding are integral to its design.

• Accurate output voltage and current sensing feeding the regulation loop and the controller’s clamp-confirm logic.
• EMI filtering and shielding to reject RF pick-up that would otherwise corrupt the feedback path or trip false faults.
• Defined fault and interlock outputs so the tool can halt safely on over-current, over-voltage or loss of clamp.
• A clean grounding and reference scheme that keeps the clamp potential decoupled from the RF bias return.

Impact on tool performance and yield

Because electrostatic clamping force governs how well a wafer is held flat against the temperature-controlled chuck, the performance of this supply propagates directly into etch results. A degraded or unstable supply rarely fails in isolation; it manifests as a chain of process consequences:

• Loss of clamping force compromises backside helium thermal coupling, causing wafer temperature drift and across-wafer critical-dimension variation.
• Insufficient clamp can allow wafer movement or popping, generating particles and risking wafer breakage in the chamber.
• Incomplete de-chuck leaves residual charge that sticks the wafer to the chuck, causing lift-pin faults and robot hand-off errors.
• Voltage instability degrades etch uniformity and repeatability, pushing lots out of specification.
• Recurring clamp faults force unscheduled chamber down events, eroding tool availability and overall fab throughput.

Common failure modes

High-voltage output degradation

Over years of duty cycling, ageing capacitors, stressed high-voltage components and connector degradation cause the output to drift out of regulation or develop excess ripple. The clamp force weakens or becomes unstable, and the tool begins logging marginal clamp or helium-leak warnings before an outright failure.

Arcing and dielectric breakdown stress

Repeated high-voltage switching combined with contamination, moisture ingress or a compromised chuck dielectric can promote arcing at the output. Arc events stress the output stage and protection circuitry, and in severe cases trip the current limit or damage components, leaving the supply unable to reach or hold its set point.

Control and feedback faults

Failures in the sensing, regulation or interface circuitry produce erratic behaviour: false clamp-status reports, intermittent enable response, or nuisance over-current trips driven by RF pick-up on a degraded feedback path. These faults are often intermittent, making the supply a prime candidate for swap-out with a known-good spare during troubleshooting.

Installation and replacement guidance

Replacement should be carried out by a qualified service engineer following LAM procedures, with strict observance of high-voltage safety. The unit stores and delivers potentially lethal voltages, so isolation and discharge are mandatory. A typical replacement sequence is as follows:

• Place the chamber in a safe state, complete the wafer in process or remove it, and bring the tool offline through the controller.
• Apply lock-out/tag-out, remove main and high-voltage power, and allow the high-voltage circuitry to discharge fully before access.
• Verify zero energy with a suitably rated meter, then label and disconnect the high-voltage output, control harness and ground connections.
• Remove the mounting hardware and withdraw the existing ESC power supply from the electronics bay.
• Install ES2022-075 in the same orientation, secure all fixings, and reconnect the output, signal and ground connections exactly as labelled.
• Restore power, run the controller’s clamp/de-clamp diagnostic, and confirm output voltage, current monitoring and clamp-status signalling are correct.
• Qualify with a test wafer, checking backside helium pressure and de-chuck behaviour before returning the tool to production.

Spare parts strategy for LAM etch fabs

An ESC power supply is exactly the sort of low-volume, high-consequence component that justifies a planned spares holding. When it fails there is rarely a workaround, and a tool without a reliable clamp supply simply cannot run. Sourcing ES2022-075 through ESCT Fab Support offers a practical alternative to OEM lead times and pricing:

• Verified to the form, fit and function of OEM P/N 810-017086-002 for direct replacement.
• A typical lead time of approximately 3 weeks, supporting both planned spares stocking and reactive repair.
• Cost-effective relative to OEM channels, helping control maintenance spend across an etch fleet.
• Backed by ESCT’s focus on semiconductor fab spare and replacement parts and applications support.
• Suitable for holding as a swap-out unit to shorten diagnosis of intermittent clamp faults.

Frequently asked questions

What does the LAM ESC power supply actually do?

It generates and regulates the high-voltage DC potential applied to the electrostatic chuck, creating the electrostatic force that clamps the wafer to the temperature-controlled lower electrode during plasma processing, and manages the controlled de-clamp at end of process.

Is this an original OEM part?

No. This is not an original LAM part. It is supplied as a new OEM-compatible unit that has been verified to match the form, fit and function of OEM P/N 810-017086-002, offered as an alternative to factory channels.

How do I know the ESC power supply is failing?

Typical indicators are clamp or de-chuck faults, backside helium leak alarms, wafer temperature drift, uniformity excursions and intermittent or nuisance over-current trips. Because these can be intermittent, the supply is often confirmed by substituting a known-good spare.

What is the lead time for ES2022-075?

The typical lead time is approximately 3 weeks. We recommend holding a unit as a planned spare given that there is no operational workaround when an ESC supply fails.

Does the part require calibration or setup after installation?

After fitting, run the tool controller’s clamp and de-clamp diagnostics to confirm output voltage, current monitoring and clamp-status signalling, then qualify with a test wafer verifying backside helium pressure and clean de-chuck before returning to production. Follow LAM’s documented procedures throughout.

What safety precautions apply when replacing it?

This unit produces and stores high voltage, which can be lethal. Always apply lock-out/tag-out, remove power, allow the high-voltage circuitry to discharge, and verify zero energy with a rated meter before touching the output or connections. Only qualified service personnel should perform the work.

Summary

The LAM ESC Power Supply (OEM P/N 810-017086-002, ESCT P/N ES2022-075) is the high-voltage source behind electrostatic wafer clamping in LAM Research plasma etch systems. By delivering a tightly regulated, low-ripple, RF-immune clamp potential and a controlled de-chuck sequence, it underpins backside thermal coupling, etch uniformity and reliable wafer handling. Its failure modes, from output drift and arcing to feedback faults, translate directly into clamp alarms, yield loss and tool downtime, which is why a verified replacement on a roughly 3-week lead time is a sound element of any LAM etch spares strategy.

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 810-017086-002. 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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