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The Inner Flight Tube Liner (AMAT OEM P/N 0020-98878, ESCT P/N ES227-0099) is a sacrificial inner sleeve fitted along the bore of the flight tube, the evacuated drift region through which the extracted ion beam travels between the analyser magnet and the downstream beamline optics on Applied Materials ion implanter platforms. In an XR80/9500-class architecture the flight tube forms a long, electrically defined vacuum conduit, and the inner liner is the surface that the beam halo, neutralised species and sputtered material actually see. By presenting a replaceable, high-purity barrier between the energetic beam and the structural tube wall, the liner protects an expensive permanent assembly while keeping the immediate beam environment clean and electrically predictable.
Although it carries no moving parts and draws no power, the inner flight tube liner is a genuine performance component rather than a passive shroud. Its position deep inside the beam transport path means that any contamination it sheds, any charge it accumulates and any geometry change it suffers is communicated directly to the beam. A liner in good condition keeps the drift region’s effective aperture consistent, suppresses particle generation and helps maintain the vacuum and electrical conditions that stable, repeatable implants depend on.
Because it sits in a high-energy, high-vacuum line-of-sight to the beam, the liner is treated as a scheduled consumable. It is one of the components that fab engineers inspect, clean or replace during beamline preventive maintenance, and sourcing a form-fit-function equivalent quickly is central to keeping implant tools at full availability.
Within the beamline, the inner flight tube liner performs several overlapping jobs that together preserve beam quality through the drift region between analysis and the end station:
Beamline liners of this class are manufactured from high-purity, vacuum-compatible refractory materials, typically fine-grain graphite or comparable beam-tolerant stock, chosen because they withstand continuous energetic-ion and neutral bombardment without melting, gross outgassing or rapid breakdown. Material purity is critical: the liner sits in the beam’s line of sight, so trace contaminants in the bulk material can be sputtered loose and carried toward the wafer.
In service the liner gradually accumulates sputtered and redeposited material on its inner face while simultaneously losing its own surface to erosion where the beam halo is most intense. Managing this balance is the heart of liner maintenance: an eroded or heavily caked liner alters the local geometry and contamination profile, so its condition is tracked against process drift and particle data.
Because the inner flight tube liner sits directly in the beam transport path, its condition is felt across beam transmission, contamination control and tool uptime. A degraded liner rarely fails dramatically; instead it erodes process margin in ways that show up as drift and particle excursions:
The dominant wear mechanism is sputter erosion where the beam halo and neutral flux strike the liner most intensely. Over many beam-hours the inner surface thins and the bore opens up locally, eventually compromising the liner’s ability to protect the tube wall and maintain a consistent aperture. This is expected, end-of-life wear rather than a defect, and it sets the liner’s replacement interval.
Sputtered and redeposited material accumulates as films and flakes on the inner face. When these deposits grow thick or are stressed by thermal cycling, they can delaminate and break loose, becoming a particle source in the beam path. Flaking is a leading reason liners are cleaned or replaced before they reach their erosion limit.
Repeated heating from beam loading and cooling during idle periods can warp or crack a liner, particularly once erosion has weakened a section. A distorted liner may no longer seat correctly in the tube, can intrude into the beam envelope and accelerates both erosion and particle generation, so visible cracking or deformation warrants replacement.
Replacing the inner flight tube liner is a beamline preventive-maintenance task that must follow Applied Materials safety procedures and your fab’s local work instructions. The outline below is general guidance only:
Beamline liners are scheduled consumables, so the practical question is not whether you will replace 0020-98878 but how quickly you can do so without holding excessive capital on the shelf. ESCT Fab Support helps fabs keep implanters running by supplying form-fit-function equivalents with a clear sourcing and lead-time picture:
It is a sacrificial inner sleeve fitted along the bore of the flight tube, the evacuated drift region the ion beam travels through between the analyser magnet and the downstream beamline. It protects the permanent tube wall from beam strike and sputter erosion, presents a clean high-purity surface to the beam, and helps keep the drift-region aperture and electrical conditions consistent.
No. This is supplied as a new, OEM-compatible part that is cross-referenced to AMAT 0020-98878 and verified to the original form, fit and function. It is not an original Applied Materials branded part and is not sold as such; it is an independent equivalent intended as a direct replacement.
It corresponds to Applied Materials OEM P/N 0020-98878 and ESCT P/N ES227-0099. Quoting both numbers on your order gets the correct liner matched to your beamline configuration.
The liner is a consumable whose life depends on beam current, species and duty cycle, so there is no single fixed interval. In practice it is inspected during scheduled beamline preventive maintenance and replaced when erosion, deposit flaking or distortion indicate it can no longer protect the tube or maintain a clean, consistent bore.
Typical indicators are visible thinning or erosion where the beam halo strikes, heavy or flaking deposit build-up on the inner face, cracking or warping, and process symptoms such as particle excursions or drift in beam transmission and dose uniformity that trace back to the beam transport region.
The nominal lead time is approximately 2.5 weeks. Because the liner is a planned consumable, many fabs hold a small buffer stock and reorder against this lead time to keep preventive-maintenance schedules on track. Contact ESCT Fab Support to confirm current availability for your requirement.
The Inner Flight Tube Liner (AMAT 0020-98878, ESCT ES227-0099) is a high-purity sacrificial sleeve that protects the flight tube and maintains a clean, dimensionally stable drift region inside AMAT ion implanter beamlines. By absorbing beam-halo erosion and capturing sputtered material, it safeguards an expensive permanent assembly while protecting implant cleanliness, beam transmission and yield. As a scheduled consumable subject to erosion, deposit flaking and thermal distortion, it is best managed with a reliable, fast-turnaround supply, which is exactly what ESCT Fab Support provides with verified form-fit-function equivalents and a defined lead time.
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 0020-98878. 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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