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The FOCUS Power Supply (Applied Materials OEM P/N 0090-91415) is the dedicated high-voltage supply that energises the beam-focus electrostatic optics within AMAT Quantum and xR-class ion implanters. In an implanter beamline, the extracted ion beam diverges immediately after it leaves the source aperture, and it must be reconverged and shaped before it reaches the mass-analysis slit and the downstream end station. The FOCUS supply provides the regulated potential that drives the focusing electrode(s) responsible for that convergence, holding the beam tightly through the analyser magnet and into the resolving aperture.
Physically, this is a rack- or cabinet-mounted power assembly that sits within the implanter’s high-voltage terminal or gas-box electronics enclosure, where it operates referenced to the source platform rather than to chassis ground. It accepts a low-voltage control reference from the system controller and produces a stable, programmable focus voltage, with feedback metering returned to the host for closed-loop regulation and interlock monitoring. Because the focus electrode draws relatively little current but must be held at a precise, drift-free potential, the supply is optimised for voltage stability and low ripple rather than for raw power delivery.
When the FOCUS supply degrades, the symptoms rarely announce themselves as a hard fault. Instead, beam transmission falls, beam-current set points become difficult to hold, and dose uniformity drifts, the kind of slow yield erosion that consumes engineering hours before the root cause is traced back to a focus-voltage problem. Keeping a verified replacement on the shelf removes that single point of uncertainty from the source and beamline subsystem.
The focus supply is one of several high-voltage rails that together define the optical behaviour of the front end of the implanter. Its job is narrow but critical: deliver a clean, programmable potential to the focusing electrode so that the diverging extracted beam is shaped into a well-collimated ribbon or spot before mass analysis. Its principal functions include the following.
Beam optics are exquisitely sensitive to focus-voltage error, so the supply’s value lies in how tightly it holds its output. A well-conditioned FOCUS supply maintains low static regulation error and minimal long-term drift, with low output ripple and noise so that the focus electrode sees a genuinely DC potential rather than a modulated one.
Because the supply floats at source-platform potential and drives a high-impedance electrode, its insulation, potting and creepage design are as important as its regulation. The internal multiplier or transformer stages, filter capacitors and feedback divider must withstand the standing voltage indefinitely without partial discharge or leakage.
The focus supply sits at the head of the beamline, so its condition propagates directly to everything downstream. A drifting or noisy focus rail does not simply reduce throughput; it quietly degrades the implant quality that the whole tool exists to deliver.
Prolonged operation at standing potential, combined with cabinet heat and any ingress of moisture or process residue, gradually degrades potting compounds and insulation. The result is increasing leakage, partial discharge and eventually arc-over, which manifests as erratic output, audible or visible arcing and protective shutdowns.
Ageing of filter capacitors, drift in the feedback divider and fatigue of regulator components cause the actual output to diverge from the commanded set point. Because the change is gradual, it presents as creeping loss of beam transmission and worsening tune stability rather than an outright failure, and is easily misattributed to the source or optics.
Worn smoothing capacitors and stressed switching or rectifier devices allow ripple and noise onto the focus rail. This modulates the beam profile and shows up as dose-rate scatter or unstable beam-current read-backs. Thermal cycling of solder joints and connectors on the internal boards is a frequent contributor to intermittent, hard-to-reproduce behaviour.
Replacement should only be undertaken by personnel trained in high-voltage and ion-implant safety, following the relevant AMAT service documentation for the specific tool. Because this supply floats at source potential, lethal stored charge can persist after power-down. The following sequence outlines good practice.
High-voltage focus supplies are exactly the kind of low-volume, high-consequence component that justifies a planned spare. OEM lead times on legacy implanter electronics can be long, and a single drifting focus rail can hold a tool in a degraded state for days. Sourcing a verified replacement through ESCT Fab Support gives fab maintenance teams a practical alternative.
It supplies the regulated high-voltage potential to the beam-focus electrode, converging the diverging extracted ion beam so that it passes efficiently through the analyser magnet and resolving aperture. In short, it keeps the beam focused and the transmission high.
No. This is not an original OEM part. It is supplied by ESCT Fab Support as an OEM-compatible replacement, verified to the form, fit and function of Applied Materials P/N 0090-91415 and catalogued under ESCT P/N ES3033-147.
Typical indicators are falling beam transmission, beam current that will not hold its set point, dose-uniformity drift and focus-voltage read-backs that disagree with the command or wander during a run. Where the source and optics check out, a drifting or noisy focus supply is a strong suspect.
Replacement must be carried out by technicians trained in high-voltage and ion-implant service procedures, following the relevant AMAT documentation. The unit floats at source potential and can retain dangerous stored charge, so correct lockout, dwell and discharge steps come before any connection is touched.
The part is intended for AMAT Quantum / xR-class ion implantation systems that use OEM P/N 0090-91415. Because beamline electronics vary across tool generations, we recommend confirming the OEM part number against your machine before ordering, and our team can help verify applicability.
Keep the electronics enclosure clean, cool and dry, check cooling airflow is unobstructed, and address any arcing or interlock events promptly rather than resetting through them. Periodically reviewing focus-voltage read-back trends helps catch gradual drift before it affects yield.
The FOCUS Power Supply (OEM P/N 0090-91415, ESCT P/N ES3033-147) is the high-voltage rail that energises the beam-focus optics in AMAT Quantum and xR-class ion implanters, holding the extracted beam tightly through mass analysis. Its stability directly governs beam transmission, dose uniformity and throughput, while its failure modes, insulation breakdown, output drift and ripple, tend to erode yield quietly rather than fail outright. A verified replacement on the shelf protects the source and beamline subsystem from extended downtime and lengthy OEM lead times.
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 0090-91415. 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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