715-032759-008
SPRT,ADJ CLR,LFTR,8"

Adjustable collar lifter support, 8" (OEM P/N 715-032759-008), wafer lift pin support assembly for LAM etch systems

ESCT Fab Support P/N ES2022-131, precision lift-mechanism support for 200 mm process chambers

The Adjustable Collar Lifter Support (LAM OEM P/N 715-032759-008) is a precision mechanical support component used within the wafer lift-pin assembly of LAM Research plasma process chambers configured for 8" (200 mm) wafers. The shorthand designation “SPRT, ADJ CLR, LFTR, 8"” expands to “Support, Adjustable Collar, Lifter, 8-inch”, and that decode tells you exactly where the part lives and what it does. It is a structural support that carries an adjustable collar, and that collar in turn sets the working position of the lifter (the lift-pin actuation mechanism) that raises and lowers the wafer relative to the electrostatic chuck or cathode surface during load, process, and unload sequences.

In a typical LAM etch or strip chamber, the wafer is presented to the chuck by an end-effector, set onto a set of lift pins, and then lowered onto the chuck surface for clamping. When processing completes, the pins lift the wafer clear so the robot can retrieve it. The lifter assembly that drives those pins must repeat this travel thousands of times with tight positional accuracy and minimal particle generation. The adjustable collar support is the datum that fixes how far the lifter travels and where its mechanical reference sits. The “adjustable” element allows the lift height and pin-plane parallelism to be trimmed during build or rebuild so that all pins break the wafer free simultaneously and to an identical height.

Although it is a passive structural part rather than an active drive component, the adjustable collar lifter support is disproportionately important to handling reliability. A collar that has slipped, worn, or been set incorrectly translates directly into wafer breakage, misplacement, or particle excursions, the kind of faults that idle a tool and scrap product. For that reason it is a sensible item to hold as a qualified spare.

Functional role of the adjustable collar lifter support in LAM etch platforms

Within the lift-pin sub-assembly, this component performs several distinct mechanical duties that together define the accuracy and repeatability of wafer presentation:

• Provides a rigid structural support for the lifter mechanism, anchoring it to the chamber base or lift housing so that pin travel is repeatable.
• Carries the adjustable collar, which sets and locks the vertical reference position of the lift stroke for 8" wafers.
• Allows fine height adjustment so that all lift pins reach a common plane, so the wafer is lifted flat and de-chucks cleanly.
• Maintains the parallelism between the pin plane and the chuck surface, which is critical to avoid edge contact and chipping.
• Constrains lateral and rotational play in the lifter so that pin tips return to the same locations on every cycle.
• Acts as a defined service datum, letting technicians restore a known geometry after pin or bellows replacement without a full re-qualification.

Mechanical performance

As a structural support operating in a demanding chamber environment, the adjustable collar lifter support is judged on dimensional stability and the integrity of its clamping and adjustment features.

Structural rigidity and dimensional stability

The support body is typically machined from anodised aluminium or stainless steel selected for stiffness, corrosion resistance, and compatibility with the chamber’s thermal and vacuum conditions. Its value lies in holding a fixed geometry over many thousands of lift cycles.

• High stiffness to resist deflection under the repeated load of lifting a wafer and its pin carrier.
• Low thermal distortion so that the lift reference does not drift as the chamber cycles in temperature.
• Corrosion-resistant surface finish to withstand residual process chemistries and cleaning agents.
• Tight machined tolerances on mounting and bore features to preserve coaxial alignment of the lifter.

Clamping and adjustment integrity

The adjustable collar relies on a clamping interface, commonly a split clamp, set screw, or threaded lock, to hold its set position against vibration and cyclic load. The reliability of that lock is what keeps the lift height from creeping.

• Secure clamping that resists slip under the repeated impulse of pin actuation.
• Fine, repeatable adjustment travel for setting a precise lift height and pin-plane parallelism.
• Galling-resistant thread and clamp surfaces so the collar can be re-set during service without seizing.
• Defined locking torque that holds setting without distorting the support or the collar.

Impact on tool performance and yield

Because this support governs how the wafer is lifted and presented, its condition feeds directly into handling reliability, particle performance, and ultimately yield:

• Consistent lift height means the robot end-effector picks and places at the expected plane, avoiding mis-handing and aborts.
• A flat, parallel pin plane de-chucks the wafer evenly and minimises the risk of edge chipping or fracture.
• Stable geometry reduces particle generation from rubbing, slip-stick, or off-axis pin motion.
• Reliable wafer handling lowers unplanned downtime and the cost of broken-wafer recovery and chamber cleaning.
• Repeatable presentation supports stable clamping and back-side gas sealing, which protects process uniformity.

Common failure modes

Collar slip and setting drift

The most consequential failure is loss of the adjusted setting. Cyclic load and vibration can gradually loosen the clamp, allowing the collar to creep. The lift height shifts, pins lose their common plane, and the tool begins to throw handling errors or chip wafers before the cause is obvious.

Wear, galling and thread damage

Repeated adjustment and the abrasive chamber environment wear the clamp, bore, and thread surfaces. Galling or rounded adjustment features make it impossible to set the collar precisely, and a damaged thread may no longer hold torque, defeating the purpose of an adjustable support.

Corrosion and distortion

Exposure to residual process chemistry and aggressive cleaning can corrode or pit the support, while thermal cycling and accumulated stress can distort it. Either condition degrades alignment and parallelism, introducing tilt into the lift plane and accelerating downstream pin and bellows wear.

Installation and replacement guidance

Replacement should be performed by a qualified technician following the relevant LAM service documentation for the specific chamber configuration. The sequence below is a general guide:

• Place the tool in a safe maintenance state, vent the chamber as required, and isolate vacuum, gas, and mechanical actuation per lock-out procedures.
• Record the existing collar setting or reference dimension before disturbing anything, so the new part can be set to a known starting point.
• Access the lift-pin assembly, support the lifter, and remove the worn adjustable collar support, noting orientation and any shims.
• Fit the replacement support (ES2022-131), restoring orientation and any spacing elements; do not fully lock the collar yet.
• Set the lift height and adjust the collar so all lift pins reach a common, parallel plane relative to the chuck surface; verify with a gauge or feeler check.
• Lock the collar to the specified torque, confirm no slip, and cycle the lifter manually to check smooth, square pin travel.
• Restore vacuum, run wafer-handling and particle qualification, and confirm clean pick-and-place before returning the tool to production.

Spare parts strategy for LAM wafer handling components

Lift-mechanism supports are low-cost relative to the downtime and scrap they prevent, which makes them ideal candidates for the qualified-spares shelf. ESCT Fab Support offers a practical alternative to single-source OEM procurement:

• Parts verified to form, fit, and function so they install and behave as the original component.
• Clear cross-referencing against the LAM OEM part number to remove ambiguity at the receiving dock.
• A competitive, transparent alternative to sole-source OEM channels that helps control maintenance spend.
• Consistent supply for repeat orders, supporting standardised rebuild kits across multiple chambers.
• Technical support to confirm applicability to your specific chamber configuration before you commit to an order.

Frequently asked questions

What does the part name “SPRT, ADJ CLR, LFTR, 8"” actually mean?

It is OEM shorthand for “Support, Adjustable Collar, Lifter, 8-inch”. In plain terms, it is the structural support that carries an adjustable collar used to set the working position of the wafer lift-pin mechanism (the lifter) in a LAM process chamber configured for 8" (200 mm) wafers.

Is this an original LAM OEM part?

No. This item (ESCT P/N ES2022-131) is supplied as a new, OEM-compatible part and is not an original OEM-branded component. It is cross-referenced to LAM OEM P/N 715-032759-008 and verified to match the original in form, fit, and function so it can be used as a direct replacement.

Why is the collar “adjustable”?

Adjustability lets a technician trim the exact lift height and pin-plane parallelism during build or rebuild. This brings all lift pins to a common plane and the wafer is lifted flat, which protects against edge chipping, de-chuck faults, and handling errors.

What happens if the support or collar fails?

If the collar slips or the support wears or distorts, the lift height drifts and the pin plane goes out of parallel. Symptoms include wafer-handling aborts, mis-placement, increased particle counts, and in the worst case wafer breakage, all of which lead to downtime and scrap.

Does it fit 300 mm tools?

No. This support is specific to 8" (200 mm) wafer configurations. The geometry and lift dimensions differ for 300 mm platforms, so a 200 mm part should not be substituted onto a 300 mm chamber. Contact ESCT to confirm the correct part for your specific tool.

What is the lead time?

The current lead time for this part is approximately 5 weeks. We recommend holding lift-mechanism supports as qualified spares so that a worn or slipped collar can be swapped during a planned maintenance window rather than an unplanned tool-down event.

Summary

The Adjustable Collar Lifter Support (LAM OEM P/N 715-032759-008, ESCT P/N ES2022-131) is a precision mechanical support within the wafer lift-pin assembly of LAM 8" (200 mm) plasma process chambers. By carrying an adjustable collar that fixes the lift height and pin-plane parallelism, it lifts wafers flat, de-chucks them cleanly, and presented repeatably to the handling robot. Though passive, it has an outsized effect on handling reliability, particle performance, and yield, and its principal failure modes, collar slip, wear and galling, and corrosion or distortion, are readily addressed by a qualified replacement. Held as a spare, it lets fabs protect uptime cost-effectively. With a 5-week lead time, ESCT Fab Support supplies it as a form-fit-function alternative to sole-source OEM procurement.

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 715-032759-008. 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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