OEM P/N:
ESCT P/N:
PART TYPE:
OEM:
The Source Magnet Control PCB is the dedicated control electronics board that governs the source magnet coil within the ion source assembly of Applied Materials (AMAT) ion implantation systems. In a Bernas, indirectly heated cathode (IHC) or freeman-type source, a magnetic field is applied across the arc chamber to confine the discharge plasma, lengthen electron path lengths and raise ionisation efficiency. This board is the closed-loop regulator and interface that sets, drives and monitors the current flowing through that source magnet coil, translating the implanter control system’s demand into a precise, stable magnet excitation.
Physically, the part is a populated printed circuit assembly carrying analogue regulation circuitry, current-sense and feedback paths, drive transistors or gate-drive stages for the magnet supply, protection logic and a connector interface to the source power distribution and the host controller. It sits within the source power electronics enclosure or terminal cabinet of the implanter, close to the high-voltage source rack, where it receives a set-point command and returns measured magnet current and fault status. Although small relative to the inverters and high-voltage supplies around it, the board is squarely in the signal path that determines whether the source produces a stable, repeatable beam.
Because the source magnet field directly shapes plasma density and the resulting extracted beam current, the integrity of this control board has a disproportionate influence on source stability, beam tuning time and ultimately wafer-to-wafer dose repeatability. A drifting or intermittently faulting magnet control board is a frequent root cause behind beams that will not strike, will not hold tune, or wander between maintenance cycles.
Within the source subsystem, the board acts as the bridge between the implanter’s recipe-driven control demand and the physical magnet that confines the arc plasma. Its core responsibilities include:
The value of this board lies in how tightly and how repeatably it holds magnet current. Good performance depends on the precision of the current-sense element, the stability of the voltage reference and the loop compensation that prevents oscillation or sluggish settling.
The board also carries the power-handling and protective elements that keep the magnet circuit safe. Hard-wearing drive components and dependable fault detection are what allow the source to fail gracefully rather than damage the coil or itself.
Because the magnet field is one of the primary levers used to tune source output, the behaviour of this board propagates straight through to the implant result and to source-related uptime.
The board operates in a warm source cabinet and carries current-handling devices, so electrolytic capacitors, voltage references and drive transistors age over time. The result is gradual regulation drift, slower loop response and eventually out-of-tolerance magnet current that the source operator notices as creeping beam instability.
Repeated thermal cycling and the higher currents at the magnet terminations stress solder joints and connector pins. Hairline cracks and high-resistance contacts produce intermittent open circuits that present as random source trips, hard-to-reproduce faults and beams that drop out under vibration or after a cabinet door is closed.
Degradation in the current-sense path or protection logic can cause the board either to misread magnet current, driving the wrong field, or to trip nuisance over-current and open-coil faults when none exist. Either failure mode undermines confidence in the source and forces unnecessary troubleshooting elsewhere.
Replacement should be carried out by qualified service personnel following the implanter manufacturer’s safety and lockout procedures. The source rack operates at high voltage, so the work area must be fully de-energised and verified before any board is touched. A representative sequence is:
Source magnet control electronics are exactly the kind of low-cost, high-consequence part that benefits from a planned spares holding rather than reactive procurement. ESCT Fab Support supplies this board as a verified alternative to sole-source OEM ordering, with the following advantages:
It regulates and monitors the current through the ion source magnet coil. The source magnet provides the field that confines the arc plasma and improves ionisation, and this board holds that magnet current at the value demanded by the implanter recipe while reporting status back to the controller.
No. This is an OEM-compatible replacement board supplied by ESCT Fab Support under ESCT P/N ES3033-163 and cross-referenced to AMAT OEM P/N 0100-90872. It is verified to match the original in form, fit and function but is not an original Applied Materials branded part.
Typical symptoms include magnet current that will not reach or hold its set-point, beams that drift or will not strike, and intermittent or nuisance source faults relating to the magnet circuit. Confirming the magnet coil itself is healthy first helps isolate the fault to the control board.
It belongs to the ion source power and control subsystem of the implanter, residing in or near the source electronics enclosure that sits adjacent to the high-voltage source rack. It interfaces between the source controller and the magnet coil supply.
Installation must be performed by qualified service personnel using the manufacturer’s lockout and high-voltage safety procedures, with full ESD protection. The source rack carries lethal voltages and stored energy, so the enclosure must be de-energised and verified safe before the board is handled.
Yes. The board is inexpensive relative to the cost of source downtime, and its failure can idle an implanter until a replacement arrives. Holding one on the shelf converts a potential multi-day source-down event into a short planned swap.
The Source Magnet Control PCB (AMAT OEM P/N 0100-90872, ESCT P/N ES3033-163) is the closed-loop control board that sets, drives and monitors the ion source magnet current in AMAT Quantum and xR-class ion implanters. By holding the confining magnetic field stable and accurate, it underpins source stability, beam tuning and dose repeatability. As a component prone to thermal ageing, solder and connector fatigue, and sense or protection circuit faults, it is an ideal candidate for proactive sparing. ESCT Fab Support offers a form, fit and function verified replacement to keep your source running without reliance on single-source OEM supply.
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 0100-90872. 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.
Fill out the form below to request a quote for the part/s you require, making sure to include the OEM part number.
If the part you are looking for is not listed, get in touch and we will try to source it for you through our wide network of partners and suppliers.
We use cookies We use analytics cookies to see how visitors use this site, so we can improve it. They are set only if you accept. Read our Cookie Policy.
