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The Suppression Power Supply (AMAT OEM P/N 0090-93023) is the dedicated bias unit that energises the suppression electrode in the extraction optics of an Applied Materials ion implanter. In these tools, ions are pulled from the source plasma by a high-voltage extraction field and shaped into a defined beam before they enter the beamline. The suppression electrode sits immediately downstream of the extraction aperture, and the only job of this supply is to hold that electrode at a controlled negative potential relative to ground so that the extraction column behaves predictably.
Without a stable suppression bias, secondary electrons generated where the beam strikes apertures, ground electrodes and beamline surfaces are free to stream back up the potential gradient towards the source. That back-streaming current corrupts the measured beam current, destabilises the plasma sheath at the extraction aperture and degrades the optical quality of the extracted beam. The 0090-93023 supply is therefore a small but disproportionately important component: it is not in the beam path itself, yet it underwrites the accuracy of every dose the tool delivers.
Because it operates in a high-voltage, electrically noisy environment riding on the extraction terminal, the suppression supply must combine precise low-current regulation with solid isolation and arc tolerance. When it drifts or fails, the symptoms often present as beam-tuning and dose-control faults that are easy to misattribute to the source or the dosimetry system, which is exactly why a known-good replacement is such a useful item to hold on the shelf.
Within the extraction and source-control architecture, the 0090-93023 supply performs a tightly defined set of functions that together keep extraction optics stable and beam current measurement honest:
The defining characteristic of a suppression supply is tight, low-ripple regulation of a modest-current, moderately high-voltage output. The electrode draws very little steady-state current, so the supply must hold its setpoint accurately even when the load is dominated by transient electron and displacement currents rather than a clean resistive draw.
Because the electrode shares the high-voltage extraction environment, the supply must withstand flashovers without damage and recover cleanly. Its insulation system, transformer construction and protection circuitry are what separate a long-lived unit from one that fails early in service.
Although it sits at the periphery of the beam, the suppression supply has a direct line to the metrics that matter most on an implanter: dose accuracy, uniformity and beam stability. When it underperforms, the consequences ripple through the process:
Ageing of feedback components, reference circuitry and output-stage devices causes the suppression voltage to drift off setpoint or regulate sluggishly. The tool may still extract a beam, but dose readings wander and beam tuning becomes inconsistent, producing intermittent faults that are hard to pin down.
Repeated extraction-gap arcing stresses the supply’s insulation, potting and high-voltage transformer. Over time this can degrade dielectric strength, leading to internal tracking, leakage current or hard flashover. Once insulation is compromised the unit may trip on over-current or fail to reach its commanded suppression voltage.
Damaged connectors, broken feedback signals or noise-corrupted monitor lines can leave the controller unable to verify the suppression output. This often manifests as an interlock that prevents extraction, or as the controller commanding incorrect compensation because the feedback it receives no longer reflects the true output.
Replacement should be carried out only by personnel trained on high-voltage implanter service, following the relevant AMAT procedures and your site’s lock-out/tag-out requirements. The following sequence outlines the typical workflow:
A suppression supply fault rarely announces itself cleanly; it hides inside dose and beam-tuning symptoms that can consume hours of diagnostic time. Holding a verified replacement turns that ambiguity into a quick swap-and-confirm. ESCT Fab Support helps fabs and refurbishers keep extraction-optics hardware available without OEM lead-time exposure:
It biases the suppression electrode in the extraction column to a controlled negative voltage. That negative field repels secondary electrons generated downstream, stopping them from streaming back towards the source so the measured beam current, and therefore the implant dose, stays accurate.
No. This unit is supplied as a new, OEM-compatible part cross-referenced to AMAT P/N 0090-93023 under ESCT P/N ES3033-143. It is not an original Applied Materials part, but it is verified to match the original in form, fit and function.
Symptoms include drifting or unstable beam-current readings, difficult beam tuning, uniformity excursions and intermittent extraction or dosimetry faults. Confirm the suppression setpoint against its monitor feedback; if the output drifts, fails to regulate or trips during normal extraction, the supply is a strong candidate.
It may extract a beam, but performance will be compromised. Without suppression, back-streaming electrons corrupt beam-current measurement and destabilise extraction, leading to dose errors and poor uniformity. Running production in this state is not advisable.
After installation you should verify the suppression setpoint and monitor feedback, confirm correct arc-recovery behaviour, then re-tune the beam and run a dose and uniformity qualification before releasing the tool to production. This confirms the new unit integrates correctly with the controller’s closed loop.
Implant dose is derived from integrated beam current. Any parasitic electron current allowed through by an unstable suppression field distorts that integration, shifting the implanted dose. Because dose directly affects device threshold voltages and junction behaviour, even small suppression errors can translate into parametric yield loss.
The Suppression Power Supply (AMAT OEM P/N 0090-93023, ESCT P/N ES3033-143) is a compact but critical bias unit in the extraction optics of Applied Materials ion implanters. By holding the suppression electrode at a stable negative potential, it blocks back-streaming secondary electrons, protects the accuracy of beam-current measurement and keeps extraction stable, all of which underpin dose control and uniformity. Its failure modes, output drift, high-voltage insulation breakdown and interface faults, tend to surface as elusive dose and tuning problems, which is precisely why a verified replacement on the shelf is such an effective safeguard for tool 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 Applied Materials part number 0090-93023. 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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