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PreAccel Power Supply

PreAccel power supply – high-voltage pre-acceleration supply for AMAT Quantum and xR-class ion implantation systems

ESCT part number ES3033-102 – pre-acceleration beamline power supply for Applied Materials implanters

The PreAccel Power Supply is a high-voltage power conversion assembly used within the beamline of Applied Materials (AMAT) ion implantation systems, including the Quantum and xR-class platforms. As its name indicates, it energises the pre-acceleration stage of the implanter – the electrostatic optics positioned immediately downstream of the ion source extraction electrodes and ahead of the main acceleration column. Here, the supply establishes a controlled potential difference that imparts an initial, well-defined kinetic energy to the freshly extracted ion beam before it is handed off to subsequent acceleration, mass analysis and transport stages.

In an implanter, the energy a dopant ion ultimately carries when it strikes the wafer is set by the cumulative potentials applied across a chain of acceleration and deceleration elements. The pre-acceleration potential is one of the earliest and most influential of these. By stabilising the beam energy as it emerges from the source region, the PreAccel supply directly affects extraction efficiency, beam optics matching into the analyser magnet, and the energy purity of the implant. A drifting or noisy pre-acceleration rail propagates downstream as beam steering errors, transmission losses and dose-rate instability.

Because it operates at elevated potential and must hold a precise, low-ripple output under a dynamically changing beam load, the PreAccel Power Supply is a precision regulated high-voltage instrument rather than a simple bulk converter. The assembly ES3033-102 supplied by ESCT Fab Support is offered as a form-fit-function equivalent to the original beamline supply, allowing fabs and tool refurbishers to restore implanter availability without a long OEM procurement cycle.

Functional role of the PreAccel power supply in AMAT ion implantation platforms

The PreAccel Power Supply sits at the interface between the high-voltage source terminal and the precision beam-transport optics, and it must deliver a clean, regulated potential that the rest of the beamline can rely on. Its principal functions include:

• Generating and regulating the pre-acceleration potential applied to the extracted ion beam immediately downstream of the source.
• Setting the initial beam energy to a programmed value so that the beam enters the analyser magnet with the correct rigidity for clean mass selection.
• Maintaining low output ripple and tight regulation under a beam load that varies with species, current and source tuning.
• Responding rapidly to recipe-driven setpoint changes as the tool switches between implant species and energies.
• Reporting voltage and current telemetry to the implanter control system for closed-loop dose and energy verification.
• Protecting itself and the beamline through arc detection, current limiting and fast shutdown when a high-voltage breakdown occurs in the source or column.

Electrical and signal performance

High-voltage regulation and stability

The defining electrical characteristic of the PreAccel Power Supply is its ability to hold a precise output potential while the beam presents a fluctuating, partly capacitive and partly resistive load. Internally this is achieved with a regulated high-voltage conversion stage – typically a switched primary driving a step-up transformer feeding a high-voltage multiplier or rectifier stack, with a feedback divider closing the loop on output voltage.

• Tight line and load regulation so the pre-acceleration energy stays constant despite source-current variation.
• Low output ripple and noise to preserve beam energy purity and minimise dose striping on the wafer.
• A stable, well-calibrated feedback divider that keeps the reported voltage matched to the true terminal potential.
• Adequate transient response to settle quickly after recipe-driven setpoint steps.

Insulation, arc handling and control interface

Operating at high potential places severe demands on insulation and on the supply’s ability to survive repeated arc events that are an inevitable part of ion-source life. The assembly must dissipate stored energy safely and recover without latching faults that interrupt production.

• High-grade potting, creepage and clearance design to withstand the working potential without partial discharge.
• Arc detection and fast current foldback to limit energy delivered into a source flashover.
• Automatic recovery sequencing so the supply re-establishes setpoint after an arc without operator intervention.
• Analogue and digital control and monitoring lines that integrate with the implanter’s high-voltage control rack.

Impact on tool performance and yield

Because the pre-acceleration potential influences beam energy, transmission and steering from the very start of the beamline, the health of this supply has an outsized effect on implant quality and tool uptime. A degraded unit produces consequences that are felt right at the wafer:

• Energy errors that shift the dopant junction depth and degrade device threshold control.
• Beam steering and transmission losses through the analyser, reducing usable beam current and dose rate.
• Ripple-induced dose non-uniformity and striping across the wafer.
• Frequent arc-fault trips that abort wafers mid-implant and lower mean time between failure.
• Unstable source tuning that lengthens setup and qualification time after maintenance.
• Unplanned downtime when the supply fails outright and no spare is on hand.

Common failure modes

High-voltage insulation breakdown

Years of operation at elevated potential, combined with thermal cycling and the energy dumped into the supply during source arcs, gradually degrade potting compounds, transformer insulation and high-voltage rectifier components. The result is partial discharge, tracking and eventually a hard short or flashover that collapses the output and can damage associated rectifier and multiplier elements.

Regulation drift and excessive ripple

Ageing of the feedback divider, reference, control electronics and output filter capacitors causes the supply to drift from its calibrated setpoint or to develop elevated ripple. Symptoms are subtle at first – small energy offsets and creeping dose-uniformity problems – before becoming severe enough to fail wafer qualification.

Switching stage and arc-stress damage

The primary switching devices, snubbers and protection circuitry absorb repeated arc transients reflected back from the source. Over time this stress fatigues semiconductors and passive components, producing intermittent dropouts, nuisance fault trips, or a complete loss of output that takes the implanter out of production.

Installation and replacement guidance

Replacing a high-voltage beamline supply is a task for trained service personnel working under the tool’s lockout and high-voltage safety procedures. The outline below is a general guide and does not replace AMAT service documentation or site safety rules:

• Place the implanter in a safe state, disable the high-voltage system and follow full lockout/tagout for the beamline power rack.
• Allow adequate dwell time and verify with a grounding stick that all high-voltage capacitances have discharged to zero before touching any conductor.
• Label and disconnect the high-voltage output lead, input power and control/monitoring harnesses from the existing supply.
• Remove the mounting hardware and withdraw the failed unit, noting its orientation and cable routing for the replacement.
• Install ES3033-102 in the same position, reconnect all leads to their labelled terminations and confirm secure high-voltage and ground connections.
• Restore power, clear lockout and bring the supply up at low setpoint to verify regulation, telemetry and the absence of partial discharge.
• Run beam setup and dose/energy qualification to confirm the implanter meets specification before returning the tool to production.

Spare parts strategy for AMAT ion implanters

High-voltage power supplies are among the components most likely to cause sudden, costly implanter downtime, yet OEM lead times can stretch into weeks. Holding a qualified equivalent on the shelf is sound risk management. Sourcing ES3033-102 through ESCT Fab Support offers several advantages:

• Form-fit-function equivalence to the original AMAT pre-acceleration supply for direct replacement.
• Verification to confirm output regulation, ripple and protection behaviour before despatch.
• A cost-effective alternative to OEM pricing, easing the budget impact of holding critical spares.
• Reduced exposure to extended OEM procurement cycles and the production loss they cause.
• Knowledgeable support to help confirm suitability for your specific implanter configuration.

Frequently asked questions

What does the PreAccel power supply actually do?

It generates and regulates the pre-acceleration potential applied to the ion beam just after extraction from the source. This sets the beam’s initial energy and rigidity so it enters the analyser magnet and downstream optics correctly, directly influencing implant energy, beam transmission and dose stability.

Is this an original OEM part?

No. ES3033-102 is supplied by ESCT Fab Support as an OEM-compatible part. It is verified to match the original supply in form, fit and function and is intended as a direct equivalent, but it is not an original Applied Materials branded component.

Which AMAT systems does it suit?

It is intended for Applied Materials ion implantation platforms in the Quantum and xR-class families that use a pre-acceleration stage in the beamline. As implanter configurations vary, we recommend confirming compatibility with your specific tool and serial configuration before ordering.

What are the warning signs that the supply is failing?

Typical indicators include energy or dose-uniformity drift, increased beam-current instability, rising arc-fault trip frequency, audible or measurable partial discharge, and intermittent or complete loss of output. These symptoms often appear gradually before an outright failure.

Can our own technicians install it?

Yes, provided they are trained and authorised to work on high-voltage implanter systems and follow the proper lockout, discharge and grounding procedures. Because this is a high-voltage assembly, installation must always be carried out under AMAT service documentation and your site’s safety rules.

Do you offer support if we are unsure of the right part?

Yes. Our team can help cross-check your tool configuration and symptoms against ES3033-102 to confirm it is the correct pre-acceleration supply for your implanter, and advise on holding it as a critical spare.

Summary

The PreAccel Power Supply (ESCT P/N ES3033-102) is a precision high-voltage assembly that energises the pre-acceleration stage of AMAT Quantum and xR-class ion implanters, setting the beam’s initial energy and rigidity as it leaves the source. Its regulation, low ripple and solid arc handling are critical to implant energy accuracy, beam transmission and dose uniformity. Because high-voltage supplies are a common cause of sudden downtime with long OEM lead times, a verified, form-fit-function equivalent kept as a critical spare is a sound way to protect implanter 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 the referenced Applied Materials part. It is not an original OEM part and is not sold as one. It is not manufactured by, endorsed by, or affiliated with Applied Materials, and all manufacturer names and part numbers are quoted for identification and compatibility purposes only.

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