810-017007-001
CONVECTRON TUBE INTERFACE B/D

Convectron tube interface board (OEM P/N 810-017007-001), vacuum gauge signal interface for Lam Research plasma process systems

ESCT P/N ES2022-092, Convectron gauge tube interface board for Lam Research etch and deposition platforms

The Convectron Tube Interface Board is a signal-conditioning printed circuit assembly that connects a Convectron-style convection-enhanced Pirani vacuum gauge tube to the pressure-measurement and control electronics of a Lam Research plasma process system. The Convectron gauge measures pressure in the rough and medium vacuum range by sensing the rate at which a heated sensor wire loses heat to the surrounding gas. That heat-loss signal is small, temperature-dependent and inherently non-linear, so it cannot be passed directly to a tool controller. The interface board sits between the gauge tube and the system, providing the bridge excitation, amplification, temperature compensation and connector translation required to turn the raw sensor signal into a usable pressure reading.

In a Lam etch or strip chamber, accurate low-vacuum measurement underpins pump-down sequencing, vent and purge control, foreline and roughing-line monitoring, and the crossover handshake to the high-vacuum gauges that take over once the chamber reaches process base pressure. The Convectron tube reports pressure across roughly the millitorr-to-atmosphere span, and the interface board is the component that makes that reading available to the host. If the board degrades, the tool may mis-read foreline pressure, stall during pump-down, or trip vacuum interlocks that prevent a wafer from being processed.

Because it is an electronic interface rather than a wetted process consumable, the board is not exposed to plasma or reactive chemistry directly, but it does live in the cabinet environment of a production fab tool, subject to thermal cycling, vibration, and the long service intervals typical of semiconductor capital equipment. ESCT Fab Support supplies this board (ES2022-092) as a form-fit-function replacement to keep vacuum measurement chains operational without the cost and lead time of a complete gauge-and-electronics assembly.

Functional role of the Convectron interface board in Lam Research plasma platforms

The board performs the analogue front-end work that converts a delicate thermal-conductivity signal into a stable, repeatable output the tool controller can act upon. Its core responsibilities include the following.

• Driving the Convectron gauge tube’s heated sensor element, typically as one leg of a Wheatstone bridge held at constant temperature or constant power.
• Amplifying the small bridge-imbalance voltage produced as gas conducts heat away from the sensor wire.
• Applying temperature compensation so that ambient drift in the gauge body and cabinet does not appear as a false pressure shift.
• Linearising or scaling the non-linear thermal-conductivity response into an output the controller expects.
• Providing the connector and pin-out translation between the gauge tube cable and the tool’s vacuum-control harness.
• Feeding the conditioned pressure signal into pump-down, vent, interlock and gauge-crossover logic.

Electrical and signal performance

Signal conditioning and accuracy

The value of the board lies in how faithfully it preserves the gauge tube’s information. A Convectron sensor produces a low-level, gas-species-dependent signal, so the front-end amplification and reference stability directly set the accuracy of the reported pressure.

• Stable bridge excitation and a clean voltage reference to anchor the measurement.
• Low-offset, low-drift amplification of the sensor signal to maintain accuracy at the low-pressure end of the range.
• Calibrated scaling matched to nitrogen as the default reference gas, with the species dependence understood by the tool.
• Repeatable output behaviour across the gauge’s rough-to-medium vacuum span.

Power, noise and interconnect integrity

In a production cabinet the board must reject electrical noise from nearby RF, pumps and motor drives while delivering a clean signal over the gauge cable. Solid power handling and interconnects are as important as the analogue accuracy.

• Regulated supply rails that keep the bridge and amplifier stages within specification.
• Filtering and grounding that suppress RF pickup and ground-loop interference.
• Reliable connector seating and cable strain handling to prevent intermittent readings.
• Thermal headroom so that self-heating and cabinet temperature do not push components out of tolerance.

Impact on tool performance and yield

Although it is a small board, the Convectron interface influences several behaviours that the rest of the tool depends on. A drifting or failed board produces effects that ripple through scheduling and process control.

• Inaccurate foreline or chamber pressure readings that delay or stall pump-down sequences.
• False vacuum interlock trips that hold wafers out of process and reduce tool availability.
• Mis-timed gauge crossover, where the handshake to the high-vacuum gauge occurs at the wrong pressure.
• Vent and purge steps executed against an incorrect pressure picture, risking sequence faults.
• Increased operator intervention and unplanned downtime while the fault is traced.

Common failure modes

Calibration drift and offset error

Over years of service, component ageing in the reference and amplifier stages can shift the board’s offset and gain. The tool then reports a pressure that no longer matches the true chamber condition, often most noticeable as an inaccurate atmosphere or base-pressure indication that fails a routine calibration check.

Connector and solder-joint degradation

Thermal cycling and vibration in the equipment cabinet stress connector contacts and solder joints. The typical symptom is intermittent, noisy or dropping-out readings that appear and disappear as cables are disturbed, which can be difficult to diagnose without substituting a known-good board.

Power and component failure

A failed regulator, damaged input stage or open bridge drive can cause the board to report a stuck, railed or implausible pressure value. Voltage transients, a short in the gauge tube, or a wiring fault during maintenance can all precipitate this kind of hard failure, which usually triggers a vacuum fault on the tool.

Installation and replacement guidance

Replacement is a controlled electronics task that should be carried out by a qualified equipment engineer following the manufacturer’s service documentation. The general sequence is as follows.

• Place the affected tool or module in a safe, maintenance state and observe lockout/tagout for electrical and vacuum systems.
• Power down the relevant vacuum-control electronics and confirm the gauge circuit is de-energised.
• Note and label the gauge tube cable and harness connections, then disconnect them, taking ESD precautions throughout.
• Remove the existing board from its mounting, retaining any standoffs, fasteners and shielding.
• Fit the ES2022-092 replacement, reconnect the gauge tube and harness exactly as labelled, and verify connector seating.
• Restore power and perform the gauge calibration or zero/atmosphere adjustment per the service procedure.
• Run a pump-down and verify accurate pressure tracking and correct interlock and crossover behaviour before returning the tool to production.

Spare parts strategy for Lam Research vacuum measurement electronics

Vacuum gauge interface electronics are exactly the kind of low-cost, high-consequence item that benefits from a planned spares position. Holding a verified board on the shelf turns a tool-down vacuum fault into a short swap rather than a procurement emergency. ESCT Fab Support offers the following advantages.

• A form-fit-function replacement verified against the original board’s electrical and mechanical interface.
• A defined three-week lead time that supports planned maintenance and spares replenishment.
• A cost-effective alternative to replacing an entire gauge-and-controller assembly to resolve a single board fault.
• Cross-referencing by both OEM P/N 810-017007-001 and ESCT P/N ES2022-092 for unambiguous ordering.
• Support for extending the service life of installed Lam Research process tools rather than scrapping working equipment.

Frequently asked questions

What does the Convectron tube interface board actually do?

It conditions the signal from a Convectron-style convection-enhanced Pirani vacuum gauge tube. The board drives the gauge’s heated sensor, amplifies and temperature-compensates the small heat-loss signal, and presents a stable pressure output to the Lam Research tool’s vacuum-control electronics so that pump-down, venting, interlocks and gauge crossover behave correctly.

Is this an original OEM part?

No. This board is supplied as a new OEM-compatible replacement verified to form, fit and function against OEM P/N 810-017007-001. It is not an original Lam Research part and is not sold as such; it is intended as a compatible equivalent for maintenance and repair.

What pressure range is the Convectron gauge used for?

A Convectron-type gauge measures the rough and medium vacuum range, broadly from the low millitorr region up to atmospheric pressure. It is typically used for foreline and chamber roughing measurement and for the crossover handshake to high-vacuum gauges, rather than for high-vacuum process base-pressure measurement itself.

How do I know the board is the cause of my pressure fault?

Typical board-related symptoms include drifting or out-of-tolerance calibration, noisy or intermittent readings that change when cables are disturbed, and stuck or implausible pressure values. Substituting a known-good board, checking connector integrity and reviewing the gauge cable and tube help confirm whether the fault lies in the interface electronics rather than the tube or wiring.

Does the gas type affect the reading?

Yes. Because a Convectron gauge measures pressure through thermal conductivity, the reading is gas-species dependent and is normally calibrated for nitrogen. When other gases are present the indicated pressure can differ from true pressure, which is a property of the measurement principle rather than a board fault and is accounted for in the tool’s configuration.

What is the lead time for ES2022-092?

The standard lead time for this board is three weeks. Holding a unit as a planned spare is recommended so that a vacuum measurement fault can be resolved with an immediate swap rather than waiting on procurement.

Summary

The Convectron Tube Interface Board (OEM P/N 810-017007-001, ESCT P/N ES2022-092) is the signal-conditioning electronics that connect a convection-enhanced Pirani vacuum gauge tube to a Lam Research plasma process system. By driving the gauge sensor and delivering an amplified, temperature-compensated and correctly scaled pressure signal, it enables accurate rough-vacuum measurement that pump-down sequencing, interlocks and gauge crossover all rely upon. Common failures (calibration drift, connector and solder degradation, and power or component faults) are best addressed by keeping a verified replacement board on hand. With a three-week lead time and a form-fit-function design, ES2022-092 helps fabs maintain vacuum measurement integrity and tool availability cost-effectively.

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 810-017007-001. 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.

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