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The Suppression Power Supply is a dedicated bias source within the extraction and beam-formation electronics of Applied Materials (AMAT) ion implantation platforms. Its job is to hold the suppression electrode of the source extraction optics at a controlled negative potential relative to the grounded ground electrode. That negative bias forms a potential barrier directly in front of the extraction aperture, repelling stray secondary electrons so they cannot stream backwards into the high-voltage extraction gap. Without it, back-streaming electrons would load the extraction supply, distort the beam optics and inflate measured beam current with a non-ion component.
On Quantum and xR-class implanters the suppression supply sits on the source side of the beamline, downstream of the arc and extraction supplies and physically close to the high-voltage terminal that floats the ion source. It is a low-current, high-voltage unit, it does not deliver beam power, it establishes a field. The current it does pass is a sensitive diagnostic: rising suppression current is one of the earliest indicators that the source aperture, suppression electrode or insulators are degrading.
Because the suppression bias directly shapes the field at the extraction aperture, the stability of this supply maps straight onto beam quality, dose repeatability and the integrity of the dose-measurement chain. A noisy or drifting suppression rail is felt across the whole tool, which is why a verified, in-specification replacement matters far more than its modest power rating might suggest.
The suppression supply performs several distinct roles within the source and extraction subsystem, all centred on controlling electron behaviour at the extraction gap rather than driving the ion beam itself:
As a high-voltage, low-current bias source, the suppression supply is judged primarily on the cleanliness and stability of its output. The internal regulation stage must hold the setpoint against changing electron load as the source ages within a run, and ripple on the rail must stay low because any modulation of the suppression field translates into modulation of the extraction optics. Insulation integrity inside the supply and along its output path is equally critical, since the unit operates referenced to a high-voltage deck.
The supply does not operate in isolation; it exchanges setpoint and readback signals with the source control electronics and participates in the tool’s protection scheme. Current metering has to be accurate because suppression current is interpreted as a health signal, and the supply must fold back or trip cleanly under an over-current or arc condition rather than passing damaging energy into the electrode.
Because the suppression supply governs the field at the extraction aperture and the integrity of the sensed beam current, its condition feeds directly into implant accuracy and uptime:
Ageing of regulation components, reference circuitry and high-voltage filter capacitors causes the output to drift from setpoint or to lose stiffness under load. The symptom is a suppression bias that no longer holds steady as source conditions change, producing creeping beam instability that is easy to misattribute to the source itself.
Operating at high voltage in a deck environment exposed to vacuum-side contamination, internal insulation and the output path can degrade, track or arc. Repeated discharge events stress the regulation stage and can trip the supply offline, and in advanced cases lead to permanent damage to the high-voltage section.
Faults in the current-sense and readback circuitry distort the suppression-current signal the controller relies on, triggering false over-current trips or masking a genuine fault. Connector corrosion and intermittent contacts on the control and high-voltage harness produce the same erratic, hard-to-reproduce behaviour.
Replacement involves working on high-voltage source electronics and must be performed only by qualified personnel following the relevant AMAT service documentation and your site’s lock-out/tag-out and high-voltage safety procedures. The sequence below is a general guide, not a substitute for the tool manual:
Source-side power supplies are low-volume, high-consequence spares: when one fails it can park a high-value implanter, yet they are not items most fabs stock deeply. Holding a verified suppression supply against your installed AMAT base protects throughput without tying up capital in obsolete OEM stock. ESCT supports this with:
It applies a regulated negative bias to the suppression electrode in the source extraction optics, creating a barrier that repels secondary electrons and stops them streaming back into the extraction gap. This protects the extraction supply and keeps the beam-current measurement honest.
No. This is not an original OEM item. It is supplied as a new, OEM-compatible part that has been verified to match the form, fit and function of AMAT OEM P/N 0090-90364, and is referenced under ESCT P/N ES3033-141 for traceability.
Typical signs include a suppression bias that drifts or will not hold setpoint, rising or erratic suppression current, unexplained beam-current instability, and nuisance trips or interlocks on the source. Arcing or insulation faults inside the supply will also force it offline.
Although it carries little current, it sets the field at the extraction aperture and removes the back-streaming electron component from the sensed beam current. If it drifts, dose integration is corrupted and the implanted dose moves off target, directly affecting device yield.
Replacement should be carried out only by qualified service personnel because it involves high-voltage source electronics. Always follow AMAT service documentation and your site high-voltage and lock-out/tag-out safety procedures, and confirm the deck is fully discharged before any access.
It is used within the source and extraction electronics of AMAT Quantum and xR-class ion implantation systems. If you are unsure whether OEM P/N 0090-90364 matches your tool configuration, our team can help confirm the fit against your installed base.
The Suppression Power Supply (AMAT OEM P/N 0090-90364, ESCT P/N ES3033-141) is the high-voltage bias source that holds the suppression electrode negative in the extraction optics of AMAT Quantum and xR-class ion implanters. By repelling back-streaming secondary electrons it protects the extraction supply, stabilises the extraction-gap field and keeps beam-current and dose measurement accurate. Its failure modes (output drift, insulation breakdown and metering error) show up as beam instability and dose error rather than obvious power loss, so a verified, in-specification replacement underpins implant accuracy and tool uptime.
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 0090-90364. 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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