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The Pre-Acceleration Power Supply, identified by Applied Materials part number 0090-91131 and supplied by ESCT Fab Support under part number ES3033-101, is a high-voltage power conversion assembly used within the beamline of AMAT Quantum and xR-class ion implantation systems. Commonly abbreviated to “PreAccel” in tool documentation and service logs, this supply generates and regulates the pre-acceleration potential that imparts the first stage of kinetic energy to ions after they are extracted from the source and before they reach the mass analyser and post-acceleration stages.
In an ion implanter, dopant species are extracted from the arc chamber as a divergent beam at relatively low energy. The pre-acceleration stage applies a controlled high-voltage gradient across an accelerating electrode structure, raising the beam to the energy required for clean mass separation and stable transport down the beamline. The PreAccel supply is the regulated source behind that gradient. Its output stability directly governs beam energy, and therefore the depth and uniformity of the implanted dopant profile in the silicon wafer.
Because the supply sits at the heart of the energy-setting chain, its behaviour is tightly coupled to recipe accuracy and to the implanter’s ability to hold beam energy within specification across long production campaigns. A drifting, noisy or intermittently faulting PreAccel supply will reveal itself as energy errors, beam instability and ultimately scrapped wafers, which is why it is treated as a critical spare in most fab maintenance plans.
Within the implanter’s high-voltage architecture, the PreAccel supply works alongside the extraction and post-acceleration supplies to define the total beam energy delivered to the wafer. It must produce a high, stable DC potential, respond to recipe-driven setpoint changes and tolerate the electrically hostile environment of the beamline terminal. Its principal functions include:
As a high-voltage regulated supply, the PreAccel assembly is judged on the precision and cleanliness of its output and on the integrity of the control and feedback signals that tie it into the implanter. Two performance domains matter most: the high-voltage power stage itself, and the regulation and signalling that surround it.
The supply’s value lies in delivering a stable, low-ripple high-voltage output that holds the commanded pre-acceleration potential under varying beam-current load. Performance characteristics that define a healthy unit include:
Beyond raw output, the supply must communicate accurately with the implanter’s control system. The signal chain lets the tool trust the energy it is setting and can react safely to fault conditions:
Because the PreAccel supply helps set the energy of every implanted ion, its condition propagates directly into device electrical results. A marginal or failing unit can quietly erode yield long before it triggers a hard fault. Typical consequences include:
Operating continuously at high potential, the supply’s insulation, potting, standoffs and high-voltage connections are stressed by field gradients, contamination and thermal cycling. Tracking, surface flashover or internal breakdown leads to arcing, audible discharge and protective shutdowns, and is one of the more common end-of-life mechanisms for HV beamline supplies.
Ageing of capacitors, rectifiers, feedback dividers and reference components causes the output to drift from setpoint, develop excess ripple or regulate poorly under load. These soft failures are insidious because the supply still produces high voltage; the energy is simply no longer accurate, showing up as marginal recipe performance rather than an outright fault.
Failures in the switching devices, high-voltage rectifier stack, gate-drive circuitry or low-voltage control electronics can cause hard shutdowns, failure to reach setpoint, or inability to enable. Repeated arc-recovery cycling and thermal stress accelerate wear in these stages, and a single failed semiconductor or solder joint can take the entire supply offline.
Replacement of a high-voltage beamline supply must follow AMAT-approved procedures and be carried out only by qualified personnel. The energies and stored charge involved make lock-out, isolation and discharge non-negotiable. The following sequence outlines the general approach:
High-voltage beamline supplies are exactly the kind of low-volume, high-impact spare where lead time and availability decide whether a tool is down for hours or weeks. Sourcing form-fit-function-verified alternatives through ESCT Fab Support gives fabs a practical hedge against OEM lead times and obsolescence. Key advantages include:
It generates and regulates the high-voltage potential that applies the pre-acceleration gradient to the ion beam after extraction and before mass analysis. In doing so it sets a key part of the beam energy, which determines implant depth and contributes directly to dopant-profile accuracy.
No. This supply is offered as an OEM-compatible part cross-referenced to AMAT P/N 0090-91131 and ESCT P/N ES3033-101. It is verified to match the original to form, fit and function, but it is not an original OEM-branded item and is not sold as such.
It is used in the beamline high-voltage architecture of Applied Materials Quantum and xR-class ion implantation systems. If you are unsure whether it matches your specific tool configuration, confirm the part number against your machine’s parts list or contact ESCT Fab Support.
Common indicators include energy-verification or recipe errors, beam instability and glitching, audible arcing or HV faults, output drift or excess ripple, and intermittent inability to reach or hold setpoint. Soft drift can degrade results well before a hard fault appears, so trend monitoring is useful.
Only by personnel qualified to work on high-voltage implanter hardware, following AMAT-approved lock-out, discharge and grounding procedures. The stored energy and operating potentials are hazardous, and verification of clean HV terminations and beam energy is required before returning the tool to production.
Yes. As an energy-critical, low-volume assembly with potentially long replacement lead times, the PreAccel supply is a strong candidate for buffer stock. Holding a verified spare minimises the risk of extended downtime when an in-service unit drifts or fails.
The Pre-Acceleration Power Supply (AMAT P/N 0090-91131, ESCT P/N ES3033-101) is a critical high-voltage assembly in the beamline of AMAT Quantum and xR-class ion implanters, responsible for setting the pre-acceleration potential that helps define beam energy and implant depth. Its output stability, regulation and signal integrity bear directly on dopant-profile accuracy, dose uniformity and yield, while its common failure modes (insulation breakdown, output drift and switching or control-stage faults) make it a sensible item to hold as a verified spare. ESCT Fab Support offers this supply as a form-fit-function-verified, cost-effective alternative to help fabs protect uptime and keep ageing implanters in production.
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 Applied Materials part number 0090-91131. 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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