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The Slit Liner Door Assembly is a precision sheet-metal and shield component that sits at the wafer transfer opening of an Applied Materials EMAX 200 mm etch chamber. The EMAX is a magnetically enhanced reactive ion etch (MERIE) platform, and like all such chambers it relies on a slit valve through which the robot blade introduces and retracts the 200 mm wafer. The slit liner door is the movable or removable shielding element that closes off, lines and protects the region immediately around that slit, keeping aggressive etch plasma and the by-products it generates away from the slit valve hardware and the door sealing surfaces behind it.
In day-to-day operation the slit opening is one of the most chemically hostile transitions in the chamber. It is the boundary between the high-density fluorocarbon or halogen plasma inside the process volume and the comparatively clean transfer environment beyond the slit valve. The liner door provides a sacrificial, serviceable surface across that boundary so that polymer build-up, etch residue and sputtered material collect on a part designed to be cleaned or replaced, rather than on the chamber body, the slit valve plate or the O-ring grooves that must remain dimensionally true.
Because the door is a confinement and shielding component rather than a purely structural one, its condition has a direct influence on plasma uniformity near the wafer edge, on particle counts and on the integrity of the vacuum seal at the transfer slit. A worn, warped or heavily coated liner door is a common, and frequently overlooked, contributor to edge etch-rate drift and particle excursions on EMAX chambers.
The Slit Liner Door Assembly performs several interrelated jobs at the wafer transfer slit, combining mechanical confinement, plasma shielding and seal protection in a single serviceable unit:
Slit liner doors for AMAT etch chambers are typically fabricated from process-grade aluminium with an engineered surface finish, commonly anodised or bead-blasted, chosen to promote adhesion of process deposits so that flaking is delayed, while resisting the fluorine and chlorine chemistries used in MERIE etching. The flatness of the door, the squareness of its edges and the consistency of that surface treatment all matter: they determine how cleanly the part seats, how predictably deposits accumulate, and how long the door can run before it becomes a particle source.
As a confinement element the door must seat and align repeatably so that the gap geometry around the transfer slit is the same wafer-to-wafer. Inconsistent seating changes the local conductance and field near the wafer edge and can show up as edge non-uniformity. A door in good mechanical condition holds its position, presents a clean shielding face to the plasma and keeps the protected hardware behind it free of deposition.
Although it is a relatively simple-looking shield, the slit liner door has a measurable effect on EMAX chamber behaviour. Its condition feeds directly into the metrics that fab engineers track most closely:
The primary wear mechanism is accumulation of polymer and etch by-product on the plasma-facing surface. As the film thickens it eventually exceeds the adhesion the surface finish can provide and begins to flake, releasing particles that land on the wafer or migrate into the slit valve. Once a door reaches this point, cleaning or replacement is the only reliable remedy.
Repeated exposure to fluorine and chlorine chemistries, combined with the moisture absorbed during atmospheric maintenance, gradually attacks the aluminium and its protective finish. Pitting, discolouration and loss of the engineered texture reduce the door’s ability to anchor deposits, accelerating the flaking cycle and shortening service life.
Thermal cycling and aggressive cleaning can leave a door warped or with worn edges and mounting features. The result is inconsistent seating at the slit, which disturbs edge uniformity and can compromise the protection it offers the underlying valve hardware. A distorted door should be retired rather than re-fitted.
Replacement is normally carried out during a scheduled wet clean or preventive maintenance window when the chamber is already at atmosphere. Follow your site’s EMAX maintenance procedures and ESH requirements; the steps below outline the typical sequence:
As 200 mm EMAX systems continue in service well beyond their original support windows, consumable and shielding parts such as the slit liner door are exactly the items that benefit from a planned spares position. ESCT Fab Support helps fabs keep these legacy chambers productive:
It lines and shields the wafer transfer slit, confining the plasma, collecting etch by-products on a serviceable surface, and protecting the slit valve sealing hardware behind it. In doing so it helps preserve particle performance, edge uniformity and vacuum integrity.
No. This is supplied as a second-source new, OEM-compatible part. It is manufactured to match the original Applied Materials specification and is verified to form, fit and function against OEM P/N 0010-27241, but it is not an original OEM-branded item.
It is intended for the Applied Materials EMAX 200 mm magnetically enhanced reactive ion etch platform. Always confirm compatibility against your specific chamber configuration and parts list using OEM P/N 0010-27241.
Typical indicators are rising particle counts or edge defects, visible flaking or heavy deposit build-up at the next maintenance, corrosion or pitting of the surface finish, and any warping that prevents the door seating cleanly at the slit.
Light deposits can often be cleaned during preventive maintenance, but once the surface finish has degraded, the part has corroded or warped, or it has become a recurring particle source, cleaning is no longer reliable and replacement is the better course.
The current quoted lead time is 7 weeks. For chambers in continuous production, holding the door as planned buffer stock is recommended so a worn unit can be swapped out at a scheduled maintenance window rather than during an unplanned stoppage.
The Slit Liner Door Assembly (OEM P/N 0010-27241, ESCT P/N ES1011-011) is a shielding and confinement component for the wafer transfer slit of Applied Materials EMAX 200 mm etch chambers. By lining the slit, collecting etch by-products and protecting the slit valve sealing hardware, it underpins particle performance, edge etch uniformity and vacuum integrity. Supplied by ESCT Fab Support as a second-source new part verified to form, fit and function, it is a cost-effective, well-documented way to keep ageing 200 mm EMAX chambers running reliably.
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 0010-27241. 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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