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The Suppression Electrode Mounting (AMAT OEM P/N 0020-83974) is a precision structural component within the extraction optics of Applied Materials ion implanter source and beamline platforms. Its job is not to carry beam current itself but to hold the suppression electrode in an exact, repeatable position relative to the plasma electrode (the source aperture plate) and the downstream ground electrode. In a triode or tetrode extraction stack, the suppression electrode is the negatively biased element that sits between the source and ground potentials, and the accuracy with which it is held in space is one of the primary determinants of extracted beam quality.
Located in the high-vacuum, high-field region immediately downstream of the arc chamber aperture, this mounting carries the suppression electrode against the electrostatic forces, thermal loads and mechanical vibration present during extraction. It must maintain micron- to sub-millimetre-level positional stability under tens of kilovolts of potential difference while resisting sputter erosion, thermal cycling and stray beam strike. A worn, distorted or contaminated mounting translates directly into electrode misalignment, gap variation and degraded beam transport.
Because it operates at the heart of the extraction assembly, the suppression electrode mounting is a component that fabs cannot afford to overlook during preventive maintenance. ESCT Fab Support supplies ES227-0028 as a form-, fit- and function-verified replacement to keep extraction geometry within specification and minimise unplanned source downtime.
The mounting is the mechanical backbone that fixes the suppression electrode within the extraction electrode stack and ties it to the source insulator structure. Its functions extend well beyond simply holding a part in place; it defines the electro-optical geometry that shapes the extracted ion beam.
Mounting hardware in this region is typically fabricated from high-purity, vacuum-compatible metals and insulating materials chosen for dimensional stability and low outgassing. Metallic structural elements resist creep at elevated temperature, while ceramic insulators provide standoff for the suppression potential.
The value of the mounting lies in how tightly it preserves the as-built geometry. Manufacturing tolerances and datum features must reproduce the OEM design so that gap, tilt and aperture alignment fall within the implanter’s tuning window every time the source is rebuilt.
Although it is a structural part, the suppression electrode mounting has an outsized influence on implant results because extraction geometry governs beam current, emittance and stability. Degradation of the mounting propagates through the whole beamline.
Continuous exposure to energetic ions, charge-exchange neutrals and stray beam strike erodes exposed surfaces of the mounting and redeposits sputtered material elsewhere in the source. Over time this changes surface profiles, builds up conductive films that can bridge insulators, and generates particulate that migrates into the beam.
Repeated heating and cooling during source cycling, combined with localised beam heating, can warp the structure or relax fasteners and locating features. The result is creeping misalignment of the suppression electrode, gap variation and a gradual drift in extraction performance that is difficult to tune out.
Insulating elements within the mounting accumulate conductive coatings and surface damage that promote tracking, leakage current and eventual flashover. This manifests as high-voltage glitching, suppression supply instability and, in severe cases, an inability to hold the extraction potential at all.
Replacement should be carried out by trained personnel during a scheduled source rebuild, following the relevant AMAT service procedures and safety interlocks. The steps below summarise good practice; always defer to the OEM documentation and your fab’s lock-out/tag-out and high-voltage procedures.
Extraction optics hardware is consumed and reworked on a predictable cycle, so holding qualified spares of structural parts such as the suppression electrode mounting protects uptime and avoids emergency procurement at OEM lead times. ESCT Fab Support helps fabs and refurbishers maintain that buffer cost-effectively.
It is the structural support that holds the suppression electrode in a precise, repeatable position within the extraction stack. By fixing the electrode’s gap, tilt and alignment relative to the source and ground electrodes, it defines the electro-optical geometry that shapes the extracted ion beam and supports the negative suppression bias used to block backstreaming electrons.
No. This item is supplied as a new, OEM-compatible replacement part. It is verified to the form, fit and function of AMAT P/N 0020-83974 and is interchangeable with the original in service, but it is not an original Applied Materials OEM part and is not sold as one.
Typical indicators include high-voltage glitching, suppression supply instability, falling extracted beam current, drifting beam tuning, or rising particle and contamination counts traced to the source. Visible sputter erosion, deposition on insulators or distortion found during a source rebuild are also clear signals that the mounting should be replaced.
The typical lead time is approximately 2.5 weeks. We recommend aligning orders with your planned source preventive maintenance schedule and carrying a spare so that an unexpected failure does not hold up a rebuild.
Light deposition can sometimes be cleaned, but once a mounting shows sputter erosion, thermal distortion or insulator damage that affects alignment or high-voltage standoff, replacement is the safer choice. Attempting to reuse a degraded mounting risks repeat glitching, poor beam quality and shortened intervals between maintenance events.
Yes. Any change to extraction hardware affects beam optics, so after installation you should reset and verify the electrode gaps, perform a high-voltage conditioning ramp, and retune the source to confirm beam current, stability and dose uniformity before returning the tool to production.
The Suppression Electrode Mounting (AMAT P/N 0020-83974, ESCT P/N ES227-0028) is a precision support structure within the extraction optics of Applied Materials ion implanter source and beamline systems. By holding the suppression electrode in an exact, repeatable position, it governs extraction gaps, beam quality, high-voltage stability and ultimately dose uniformity and device yield. Subject to sputter erosion, thermal distortion and insulator degradation, it is a sensible item to keep in stock and replace during scheduled source maintenance. ESCT Fab Support supplies a form-, fit- and function-verified alternative with a short lead time to keep your implanters extracting cleanly and predictably.
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 0020-83974. 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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