OEM P/N:
ESCT P/N:
PART TYPE:
OEM:
The LAM Auto Tune Board (OEM P/N 810-015987-101) is the closed-loop control electronics that drive the automatic impedance matching network within LAM Research plasma process modules. In an RF-driven etch or deposition chamber, the generator delivers power at a fixed frequency, most commonly 13.56 MHz, though LAM platforms also operate at 2 MHz, 27 MHz and 60 MHz on multi-frequency tools, into a plasma load whose impedance shifts continuously with pressure, gas chemistry, electrode condition and the progress of the process step itself. The Auto Tune Board is the intelligence that senses this mismatch and commands the variable elements of the match network to cancel it in real time.
Physically, the board is a populated printed circuit assembly that resides inside the RF matchbox or its adjacent control enclosure. It interfaces with phase and magnitude sensing circuitry on one side and the motor-driven variable vacuum capacitors (or equivalent variable inductors) on the other. By interpreting the reflected-power error signals and stepping the tuning elements toward a null, it keeps the system at or near a 50 Ω match so that the maximum forward power reaches the plasma rather than being reflected back into the generator.
Because matching directly governs how much energy actually couples into the wafer, the Auto Tune Board sits squarely on the critical path for process repeatability. A board that tunes slowly, hunts, or settles to the wrong position translates into reflected power faults, generator trips and drifting etch or deposition results, making this a part where reliable, verified replacement electronics carry real production value.
The Auto Tune Board converts RF sensor information into precise mechanical positioning commands for the match network, closing the loop between the generator and the plasma load. Its principal functions include:
The board’s analogue front end must resolve small phase and magnitude differences in the presence of high circulating RF currents. Operational amplifiers, comparators and analogue-to-digital conversion stages translate the detector outputs into a usable error signal, while the control logic decides direction and step size for each tuning element. Stable reference voltages, clean grounding and well-filtered supplies all matter, since drift in any of these directly biases the match position and therefore the delivered power.
On the output side, the board drives the load and tune motors that physically rotate the variable capacitor shafts. Drive transistors, relays or motor-driver stages deliver the current these actuators demand, and the logic enforces end-of-travel limits and direction. Reliable, well-damped motor drive is what allows the network to converge smoothly; weak or noisy drive shows up as sluggish tuning, overshoot or chatter at the match point.
Because the Auto Tune Board determines how accurately and quickly RF power is coupled into the plasma, its condition propagates directly into process outcomes:
Ageing capacitors, drifting voltage references or degraded analogue conditioning cause the board to settle at the wrong position or to oscillate continuously around the match point. The visible symptoms are elevated reflected power, longer-than-normal tune times and match positions that wander between otherwise identical wafers.
Worn relays, failing motor-driver transistors or cracked solder joints on high-current output stages produce weak, intermittent or one-directional motor movement. A capacitor that will only drive one way, stalls, or moves erratically prevents the network from reaching a match and frequently triggers tune-timeout or no-match faults.
Operating inside or adjacent to the matchbox exposes the board to RF fields, heat and, on some tools, residual contamination. Over time this stresses electrolytic capacitors, connectors and ground returns, leading to noisy feedback, intermittent communication with the host and unexplained match instability that comes and goes with chamber temperature.
Replacement should be carried out by a qualified equipment engineer with the RF system fully de-energised and locked out. The following sequence reflects good practice for board-level service inside a LAM RF match assembly:
RF match control boards are exactly the kind of low-volume, high-impact electronics that justify holding a verified spare. ESCT Fab Support helps fabs keep these systems running without the cost and lead time of new OEM assemblies:
It is the control board that automatically tunes the RF impedance matching network. By sensing phase and magnitude mismatch and driving the variable match capacitors, it keeps the plasma load matched to 50 Ω so RF power is delivered efficiently with minimal reflected power.
No. This board is supplied as a reconditioned, OEM-compatible replacement that has been verified to match the original part to form, fit and function. It is not an original LAM Research factory part and is not sold as one; it is offered as a tested alternative referenced to OEM P/N 810-015987-101.
Typical signs are rising reflected power, long or failed tune cycles, capacitors that hunt or only travel one direction, intermittent match faults and process results that drift wafer to wafer. These symptoms often track chamber temperature and worsen over time as components age.
In most cases you simply replicate the jumper, switch and connector configuration of the board you remove. Record the original settings before removal, as match networks are tuned to a specific configuration and the control behaviour must be preserved exactly.
The board is the controller, not the RF power components. If the variable capacitors, motors or sensing hardware are themselves worn, replacing the board alone may not fully resolve a fault. A tune verification after installation will confirm whether the wider network is healthy.
It is used within LAM Research RF matching networks on plasma process modules. Because match assemblies vary by tool and configuration, we recommend confirming compatibility against your specific system using the OEM and ESCT part numbers before ordering.
The LAM Auto Tune Board (OEM P/N 810-015987-101, ESCT P/N R-ES2022-135) is the auto-tune control electronics for the RF impedance matching network in LAM plasma process systems. By sensing impedance mismatch and driving the variable match capacitors toward a 50 Ω null, it governs how efficiently and repeatably RF power couples into the wafer, making it directly relevant to etch and deposition stability, generator protection and overall yield. Supplied by ESCT Fab Support as a tested, reconditioned alternative, it offers a practical, cost-effective route to keeping mature LAM RF systems in reliable production.
Disclaimer: This part is supplied by ESCT Fab Support as a reconditioned, OEM-compatible component, verified to the form, fit and function of Lam Research part number 810-015987-101. 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.
