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The DPS Metal Throttle Valve Assembly (AMAT OEM P/N 0010-30135) is the automatic pressure-control valve that sits between the process chamber and the turbomolecular pump on Applied Materials Decoupled Plasma Source (DPS) etch platforms. Mounted in the foreline above the pump throat, it varies the effective pumping conductance by rotating a metal throttle plate within the valve bore, allowing the tool to hold chamber pressure precisely at the set point demanded by each process recipe. This particular configuration is the all-metal-bodied variant driven by a 5-phase stepper motor through a toothed belt and pulley arrangement, rather than a directly coupled motor shaft.
In a DPS chamber, pressure is not a fixed quantity; it is actively servoed throughout each step of an etch sequence. A capacitance manometer reads chamber pressure, the controller compares that reading against the recipe target, and the throttle valve angle is adjusted continuously to balance incoming process-gas flow against the fixed swept volume of the turbo pump. The throttle valve is therefore the final control element in the pressure loop, and its mechanical condition and motor response directly determine how tightly the tool can regulate the etch environment.
Because it is exposed to corrosive halogen etch chemistries, polymeric by-products and fine particulate, the throttle valve is a service-heavy assembly. The 5-phase stepper motor and belt drive provide the high-resolution, low-cogging positioning needed to resolve small pressure changes, while the metal valve body offers the chemical durability and bake-out tolerance that polymer-bodied valves cannot match in aggressive etch service.
Within the DPS vacuum subsystem, the throttle valve assembly performs several interlinked control and isolation duties:
The metal valve body houses a rotating throttle plate whose angle sets the open cross-sectional area and thus the conductance. The plate, shaft, bearings and dynamic shaft seal must rotate freely and repeatably across the full travel range while maintaining vacuum integrity. The all-metal construction resists swelling, embrittlement and chemical attack from fluorine- and chlorine-based etch chemistries far better than elastomer-heavy or polymer-bodied alternatives, and it tolerates the elevated temperatures associated with heated forelines and bake-out cycles.
A 5-phase stepper motor offers finer native step resolution and markedly lower cogging than equivalent 2-phase units, which translates into smoother, more granular control of the throttle angle and therefore tighter pressure regulation. In the belt-type variant, the motor drives the throttle shaft through a toothed belt and pulley pair rather than a direct coupling. This arrangement isolates the motor from direct shaft loads, allows a gear-like reduction ratio for added positioning resolution, and damps small mechanical disturbances, at the cost of a belt that must remain correctly tensioned and free of wear.
Because the throttle valve closes the chamber pressure loop, any degradation in its mechanical or motor behaviour propagates directly into process results and tool availability:
The toothed belt is the characteristic wear item of this variant. Over time the belt stretches, sheds tooth material or loses tension, introducing backlash between the motor and the throttle shaft. The stepper then turns without fully moving the plate, so commanded and actual angles diverge. Symptoms include sluggish or hunting pressure control, audible belt noise, and positioning that no longer agrees with the home reference, often appearing intermittently before progressing to a hard fault.
Continuous exposure to reactive chemistries and condensable by-products causes deposit build-up, corrosion and bearing wear on the throttle shaft. Accumulated polymer or etch residue increases rotational friction and can cause the plate to stick, while a degraded dynamic shaft seal allows base-pressure drift or small leaks. Any of these raises the torque the motor must deliver and undermines the repeatable conductance the pressure loop depends on.
The 5-phase stepper and its windings, connectors and feedback path can themselves fail. Open or shorted phases, damaged or contaminated connectors, and loss of the home/limit reference all manifest as erratic motion, failure to reach commanded position, or persistent pressure-control faults. Elevated motor temperature or noise frequently precedes outright failure, and a marginal motor combined with a worn belt accelerates the loss of positioning accuracy.
Replacement should be carried out by qualified vacuum/maintenance technicians following the applicable Applied Materials service procedures and your site safety protocols. The general sequence is:
Throttle valves are single-point dependencies in the pressure loop, so a failure takes the whole chamber down until the assembly is replaced and recalibrated. Holding a qualified spare against OEM P/N 0010-30135 protects throughput and yield without committing to long OEM lead times. ESCT Fab Support supplies this assembly with the following advantages:
It is the automatic pressure-control valve between the chamber and the turbo pump. By rotating a metal throttle plate to vary pumping conductance, it holds chamber pressure at the recipe set point throughout each etch step, acting as the final control element in the closed-loop pressure servo.
No. This is not an original OEM part. It is supplied as a new, OEM-compatible assembly that has been verified to the form, fit and function of AMAT OEM P/N 0010-30135. It is intended as a direct replacement for the original component but is sourced and supplied by ESCT Fab Support under ESCT P/N ES1011-005.
A 5-phase stepper provides finer step resolution and lower cogging than a 2-phase unit, giving smoother, more precise throttle positioning. “Belt type” means the motor drives the throttle shaft through a toothed belt and pulley rather than a direct coupling, which adds positioning resolution and damping but introduces the belt as a maintenance item. It is important to match the belt-type variant when replacing this assembly.
Common indicators include unstable or drifting chamber pressure, pressure overshoot or hunting during recipe transitions, slow settling, belt noise, a mismatch between commanded and actual valve angle, and recurring pressure-control alarms or faults. Sticking caused by deposit build-up and intermittent stepper or connector faults are also typical precursors to failure.
Etch service exposes the wetted surfaces to aggressive fluorine- and chlorine-based chemistries and to elevated bake-out temperatures. An all-metal body resists chemical attack, swelling and embrittlement far better than polymer-bodied valves, giving longer service life and more stable conductance in DPS etch applications.
The typical lead time is approximately 4 weeks. Because the throttle valve is a single-point dependency whose failure takes the chamber down, fabs running DPS tools are advised to hold at least one qualified spare so a replacement can be fitted and recalibrated during a planned window rather than an unplanned outage.
The DPS Metal Throttle Valve Assembly (AMAT OEM P/N 0010-30135, ESCT P/N ES1011-005) is the automatic chamber-pressure control valve for Applied Materials DPS etch platforms, varying pumping conductance through a metal throttle plate driven by a 5-phase stepper motor and toothed belt. Its mechanical condition, belt integrity and motor response directly govern pressure stability, etch uniformity, throughput and yield. As the final element in the pressure loop and a single-point dependency for the chamber, it is a high-value spare to hold. ESCT supplies it as a new, OEM-compatible assembly verified to form, fit and function, typically within a 4-week 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 0010-30135. 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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