1140-90056
Source MAG PSU

Source magnet power supply (OEM P/N 1140-90056), source magnet coil DC supply for AMAT Quantum / xR-class ion implanters

ESCT P/N ES3033-138, source MAG PSU for Applied Materials ion implantation systems

The Source Magnet Power Supply (Source MAG PSU), AMAT OEM P/N 1140-90056, is the regulated DC supply that energises the source magnet coil within the ion source region of Applied Materials Quantum and xR-class ion implantation systems. In these implanters the arc discharge that produces the ion plasma sits inside a magnetic field generated by the source magnet. By driving a precisely controlled current through that coil, the Source MAG PSU sets the strength of the confining field, which in turn governs plasma density, arc stability and the efficiency with which dopant ions are produced and presented to the extraction optics.

Although it is physically a power-electronics chassis rather than a part exposed to the beamline vacuum, the Source MAG PSU has an outsized influence on the front end of the tool. The magnetic field it sustains determines how electrons are confined within the arc chamber, how readily the source strikes and holds an arc, and how uniformly ions are extracted. A drifting, noisy or current-limited magnet supply translates directly into unstable beam current, poor source life and recurring extraction faults, symptoms that are easily mis-attributed to the source itself.

Because the magnet current is a tightly controlled set point referenced by the implanter’s recipe and source control software, the Source MAG PSU must deliver low-ripple, repeatable output across a wide load range while tolerating the thermal and electrical environment of the source terminal. ESCT supplies this unit as a tested, form-fit-and-function equivalent to keep the source subsystem running without committing to OEM lead times or pricing.

Functional role of the source magnet power supply in AMAT ion implanter platforms

Within the source subsystem, the Source MAG PSU performs several interlocking jobs that together keep the ion source operating in its intended regime:

• Converts incoming facility or cabinet AC/DC power into a regulated DC current that energises the source magnet coil to the field strength called for by the active recipe.
• Holds the magnet current at a stable set point so that plasma confinement, and therefore beam current, remains repeatable from wafer to wafer and lot to lot.
• Responds to set-point changes from the source control software when the recipe steps between species, energies or beam currents requiring a different field.
• Provides current and voltage feedback so the control system can monitor magnet health and flag drift, open-coil or short conditions.
• Enforces interlock and fault behaviour, shutting down safely on over-current, over-temperature or loss of regulation to protect the coil and the source terminal.
• Maintains low output ripple and noise so that magnet-induced beam fluctuations do not degrade dose uniformity.

Electrical and signal performance

Regulation and output stability

The magnet coil is a largely inductive load, so the supply must drive current into a winding whose resistance rises as it heats. Effective regulation means the Source MAG PSU continuously trims its output to hold the commanded current despite this changing load, keeping the magnetic field, and the confined plasma, constant.

• Closed-loop current regulation that compensates for coil heating and supply-line variation.
• Low output ripple to avoid imprinting AC modulation onto the confining field and the extracted beam.
• Repeatable response to commanded set points so recipe transitions settle quickly and predictably.
• Stable behaviour into an inductive load, including controlled ramp and decay of coil current.

Control interface and protection

Beyond raw power delivery, the unit must integrate cleanly with the implanter’s source control electronics, accepting a current command and returning trustworthy feedback while protecting itself and the coil under fault conditions.

• Analogue or digital command input scaled to the magnet current operating range.
• Current and voltage readback for monitoring, logging and fault diagnosis.
• Over-current, over-voltage and over-temperature protection with clean fault signalling.
• Interlock handshakes that hold the supply off until source and safety conditions are satisfied.

Impact on tool performance and yield

Because the magnet field shapes the plasma that the entire beamline draws from, the condition of the Source MAG PSU propagates downstream into productivity and device results:

• A stable supply gives consistent source output, which underpins repeatable beam current and dose accuracy.
• Drift in magnet current shifts plasma confinement, causing slow beam-current wander that erodes within-wafer and lot-to-lot uniformity.
• Excess ripple modulates the beam and can show up as dose non-uniformity or unstable tuning.
• Intermittent faults trigger source trips and re-tunes, cutting availability and lengthening source-change cycles.
• A hard failure idles the implanter entirely until the magnet supply is restored, making it a high-impact single point in the source subsystem.

Common failure modes

Output regulation drift and ripple

Ageing electrolytic capacitors, degraded feedback components and stressed power semiconductors gradually erode regulation, allowing the magnet current to drift away from set point or carry excess ripple. The result is a creeping loss of beam stability that often appears long before any fault is logged.

Thermal and power-stage failure

Continuous current delivery into an inductive load generates heat in the power stage, rectifiers and magnetics. Blocked airflow, failed fans, dried thermal interfaces or fatigued solder joints lead to over-temperature trips or outright destruction of switching devices, frequently presenting as repeated thermal shutdowns under sustained load.

Fault trips, connector and cabling issues

High-current output terminals, source-terminal connectors and control harnesses are subject to vibration, thermal cycling and the corrosive source environment. Loose or oxidised connections raise resistance, generate heat and produce intermittent over-current or loss-of-regulation faults that can be hard to distinguish from coil or source-head problems.

Installation and replacement guidance

Replacement should be carried out by a qualified implant service engineer following Applied Materials safety and lockout procedures. The magnet supply and its terminals can carry hazardous voltages and currents, and the source region demands disciplined energy isolation. The following sequence outlines a typical workflow:

• Place the source and high-voltage subsystems in a safe, off state and follow lockout/tagout to isolate input power to the supply.
• Confirm the absence of stored energy at the output and allow the magnet coil and any capacitive stages to discharge before touching terminals.
• Label and disconnect the AC/DC input, the magnet output leads and the control/feedback harness, noting orientation and torque on high-current connections.
• Remove mounting hardware and withdraw the failed unit, inspecting cabling, connectors and the coil leads for heat damage or corrosion.
• Fit the ES3033-138 replacement, reconnect input, output and signal connections, and torque all high-current terminals to specification.
• Restore power, verify the supply reaches and holds the commanded magnet current with feedback within range, and confirm fault and interlock behaviour.
• Strike and tune the source, then verify beam current and dose stability before returning the implanter to production.

Spare parts strategy for AMAT ion implant source supplies

Source-region power supplies are exactly the kind of low-redundancy, high-impact component that warrants a planned spares position rather than reactive sourcing. ESCT supports fab maintenance teams with an alternative to OEM channels for the Source MAG PSU:

• Cross-referenced to AMAT OEM P/N 1140-90056 and catalogued under ESCT P/N ES3033-138 for clear identification.
• Verified to form, fit and function so it integrates with the existing source control electronics and mounting.
• Typically more cost-effective and more readily available than equivalent OEM-channel supply.
• Backed by ESCT’s focus on AMAT ion implantation spares across the source, beamline, vacuum, scan and control subsystems.
• Suited to a critical-spare holding strategy that minimises unplanned implanter downtime.

Frequently asked questions

What does the source magnet power supply actually do?

It drives a regulated DC current through the ion source magnet coil, setting the magnetic field that confines the arc plasma. That field strength controls plasma density and arc stability, which directly affect how much beam current the source produces and how stable it remains.

Is this an original AMAT part?

No. This is supplied as a new, OEM-compatible part cross-referenced to AMAT P/N 1140-90056 and verified to form, fit and function. It is not an original OEM-branded item, and any OEM part numbers are quoted purely for identification and compatibility.

How do I know if my magnet supply is failing?

Common warning signs are slow beam-current drift, difficulty holding a stable arc, magnet-current readback that no longer matches the set point, repeated over-temperature or over-current trips, and intermittent source faults that re-tuning does not resolve. Checking the supply’s current and feedback against specification helps confirm it.

Can excess ripple from this supply affect wafers?

Yes. Ripple or noise on the magnet current modulates the confining field, which can modulate the extracted beam current. In dose-sensitive implants this can show up as degraded uniformity or unstable tuning, so low-ripple regulation matters to device results, not just to tool stability.

Does it fit my specific Quantum or xR-class implanter?

The unit is intended for AMAT Quantum and xR-class ion implantation systems that use OEM P/N 1140-90056 in the source magnet supply position. Because source configurations vary, confirm the existing part number and connector arrangement against your tool before ordering, and our team can help verify compatibility.

Should I hold one as a critical spare?

For most fabs, yes. The magnet supply is a low-redundancy item whose failure idles the source and therefore the whole implanter. Holding a verified spare on the shelf turns a potential multi-day outage into a planned swap measured in hours.

Summary

The Source Magnet Power Supply (AMAT OEM P/N 1140-90056, ESCT P/N ES3033-138) is the regulated DC current source for the ion source magnet coil in AMAT Quantum and xR-class implanters. By holding the confining magnetic field steady, it underpins arc stability, beam-current repeatability and dose uniformity at the front end of the tool. Regulation drift, ripple, thermal stress and connector faults are its main failure modes, and because it sits at a low-redundancy point in the source subsystem, a tested replacement is a sound critical spare. ESCT supplies this unit verified to form, fit and function as a cost-effective, readily available alternative to OEM sourcing.

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 1140-90056. 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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