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The De-Ionising Filter Cartridge (AMAT OEM P/N 4020-90026) is a screw-thread, inline mixed-bed ion-exchange cartridge fitted into the closed-loop cooling-water circuits of Applied Materials ion implanters. On XR80- and 9500-class source and beamline hardware, large electrical potentials are applied to components that are cooled directly by circulating water, extraction electrodes, suppression electrodes, source mounting hardware, terminal assemblies and high-voltage power-supply enclosures. Because that water is in close proximity to tens of kilovolts, its electrical conductivity must be held extremely low, and this cartridge is the consumable that keeps it there.
Internally the cartridge contains a packed bed of strong-acid cation and strong-base anion exchange resins held between retaining screens within a sealed polymeric body. The screw-thread end fittings allow the cartridge to be threaded directly into the implanter’s DI loop manifold or polishing line, providing a leak-tight, serviceable connection without bespoke clamps or O-ring carriers. As cooling water passes through the bed, dissolved ionic species, metallic ions leached from wetted surfaces, carbonates, chlorides and trace contaminants, are captured and exchanged for hydrogen and hydroxyl ions that recombine to form water, driving resistivity up towards the megohm-centimetre range.
Although physically modest, this consumable sits at the heart of high-voltage isolation and corrosion control. When the resin is fresh, the loop maintains the high resistivity needed to suppress leakage currents and electrolytic attack; when it is exhausted, conductivity climbs, leakage paths open and the entire source or beamline can become unstable. Treating the DI cartridge as a routine, scheduled consumable is therefore central to reliable implanter operation.
The cartridge performs several interlocking duties within the implanter’s water-cooling and high-voltage isolation systems. Its job is not simply to filter particles but to actively condition the chemistry of the coolant so that water can safely carry heat away from energised components.
The performance of the cartridge is defined by the quality and balance of its mixed-bed resin. A correctly formulated bed delivers consistent high-purity output across its rated service life before resistivity begins to fall away.
The cartridge body and its screw-thread end fittings must contain loop pressure reliably while remaining chemically compatible with ultra-pure water, which is itself aggressively solvent.
Coolant purity has a direct line to source stability, high-voltage reliability and ultimately wafer yield. A cartridge nearing exhaustion does not fail loudly, it degrades quietly, and the symptoms first surface as electrical instability rather than as a water alarm.
The primary end-of-life mechanism is simple exhaustion: the ion-exchange sites saturate, output resistivity drops below the loop set point, and conductivity-driven leakage and corrosion follow. This is expected wear rather than a defect, and is the reason the cartridge is treated as a scheduled consumable.
Particulate, biofilm or resin fines can foul the bed, while uneven flow can carve channels that let water bypass active resin. Both reduce effective capacity and can raise differential pressure across the cartridge, reducing the cooling flow delivered to source and beamline hardware.
Over-tightening, cross-threading or ageing of the screw-thread fittings and seals can produce weeping joints or external leaks. Even a minor leak near energised hardware is a safety and reliability concern, so connection integrity should be confirmed at every change-out.
Replacement should be carried out by qualified personnel under the tool’s lock-out/tag-out and water-handling procedures. The following sequence summarises good practice; always defer to the applicable AMAT service documentation for torque values and loop-specific steps.
Because DI cartridges are consumed predictably and their exhaustion drives high-voltage instability, they belong on every implanter owner’s critical-spares list. Sourcing them through ESCT Fab Support gives maintenance teams a dependable, cost-effective alternative to long OEM lead times.
It conditions the cooling water by mixed-bed ion exchange, removing dissolved ions so the coolant stays at high resistivity. That low conductivity matters because the same water cools components held at high voltage, and conductive water would leak current, corrode hardware and risk arcing.
No. This is supplied as a new, OEM-compatible cartridge that has been verified to the form, fit and function of AMAT OEM P/N 4020-90026. It is not an original AMAT-branded part and is offered as a compatible alternative for ion implanter DI cooling loops.
The clearest indicator is a sustained fall in loop resistivity towards the alarm set point, often accompanied by high-voltage instability or increased leakage current. Rising differential pressure can also signal fouling. Replace on resistivity trend and on your planned maintenance interval rather than waiting for a hard trip.
Yes. The threaded end fittings allow the cartridge to be screwed directly into the manifold or polishing line for a leak-tight, serviceable connection. Engage the threads by hand first and tighten to the specified torque to avoid cross-threading and seal damage.
No. Resin capacity is finite and exhaustion is inevitable. Running a spent cartridge to save cost is a false economy: degraded coolant purity accelerates corrosion and high-voltage instability, and the resulting unplanned downtime and component damage far outweigh the price of timely replacement.
This cartridge is stocked with a short lead time to support preventive-maintenance planning. Please confirm current availability and the exact lead time with ESCT Fab Support when placing your order so you can align deliveries with your scheduled service windows.
The De-Ionising Filter Cartridge (AMAT OEM P/N 4020-90026, ESCT P/N ES227-0001) is a screw-thread, mixed-bed ion-exchange consumable that keeps the cooling water of AMAT ion implanter source and beamline systems at the high resistivity demanded by high-voltage operation. By removing dissolved ions, it suppresses leakage current, controls electrolytic corrosion and protects beam stability and yield. Because exhaustion is predictable, the cartridge belongs in every implanter spares programme, and ESCT Fab Support offers it with verified compatibility and short, planning-friendly 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 4020-90026. 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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