OEM P/N:
ESCT P/N:
PART TYPE:
OEM:
The BF3 Mass Flow Controller (MFC) is a precision gas-metering instrument that regulates the delivery of boron trifluoride (BF3) into the source region of an Applied Materials ion implanter. Configured for a full-scale range of 5 SCCM (standard cubic centimetres per minute) and built on the GF120 controller platform, this device combines a thermal mass flow sensor, a proportional control valve, and an onboard control loop in a single compact body. It sits on the gas distribution panel of the implanter’s source housekeeping system, immediately upstream of the arc chamber feed line, where it governs how much dopant gas reaches the plasma at any instant.
BF3 is one of the principal feed gases for boron implantation. Because the arc chamber strikes and sustains a plasma directly from the metered gas stream, the stability of the beam current and the repeatability of the implanted dose depend heavily on the MFC delivering a clean, drift-free flow at very low set points. A 5 SCCM full-scale unit is deliberately specified for fine control: a small absolute range gives high resolution at the low flows typical of source operation, where even a fraction of a standard cubic centimetre per minute shift can move beam current and species ratios.
Because BF3 is corrosive and forms aggressive by-products in the presence of moisture and in the high-energy source environment, the wetted path of this MFC and its sensor tube are designed for high-purity, corrosion-resistant service. The GF120 designation refers to the controller electronics and form factor that interface with the implanter’s gas box and its analogue or digital command bus. This makes the unit both a fluidic and an electronic component, and its health directly shapes process stability.
In an AMAT ion implanter, the MFC translates a commanded set point from the tool controller into a precisely regulated mass flow of BF3 into the arc chamber. It is the final gas-control element between the cylinder regulator and the source, and it closes the loop between requested and actual dopant delivery in real time.
As a closed-loop instrument, the BF3 MFC depends on the accuracy of its sensor signal and the responsiveness of its valve drive electronics. The GF120 control board conditions the thermal sensor output, compares it against the command, and drives the proportional valve to converge on the requested flow.
The thermal mass flow sensor relies on heat transfer from a heated capillary to the gas stream, with the temperature differential proportional to mass flow. The control electronics linearise and gas-correct this reading, then apply proportional-integral control to the valve so that actual flow tracks the set point with minimal steady-state error and controlled settling.
The unit exchanges command and feedback signals with the implanter gas box over the GF120 interface and powers a proportional control valve. Clean power, correct grounding, and a faithful command signal all matter, because any offset or drift on these lines maps directly onto delivered dopant flow.
Because the MFC sits at the head of the dopant delivery chain, its behaviour propagates through the entire implant result. A drifting or sluggish BF3 controller undermines the very parameters the implanter exists to control.
BF3 reacts readily with trace moisture to form corrosive species that attack the sensor capillary, valve seat, and internal surfaces. Deposits and corrosion products narrow the flow path, foul the sensor, and shift calibration, producing gradual drift that often masquerades as a process problem before the MFC is suspected.
The proportional valve can develop seat leakage, allowing creep flow when fully commanded closed, or stiction that delays and roughens its response. Either fault degrades shut-off integrity and set-point tracking, and a leaking valve is a particular concern with a toxic, corrosive gas such as BF3.
Thermal sensor ageing, heater degradation, or faults on the GF120 control board cause zero and span drift, noisy feedback, or loss of closed-loop control. Symptoms include a flow reading that no longer matches downstream beam behaviour, persistent set-point error, or intermittent dropouts that destabilise the source.
Replacing a BF3 MFC involves a toxic, corrosive gas and must follow the site’s gas-panel and lockout procedures. The steps below summarise good practice and do not replace the OEM service manual or local environmental, health, and safety requirements.
Mass flow controllers are high-impact, time-sensitive spares: when one drifts or fails, it can hold an entire implanter out of production. Carrying a qualified BF3 MFC on the shelf protects throughput and shortens recovery from a gas-panel fault. ESCT Fab Support supplies this part to help fabs maintain availability without over-committing to single-source OEM channels.
It is the full-scale flow range: the controller regulates BF3 from zero up to 5 standard cubic centimetres per minute. A small full-scale range like this gives high resolution and accurate control at the low flows used in ion implanter source operation, where fine adjustment of dopant gas is important.
No. This is an OEM-compatible replacement supplied by ESCT Fab Support. It is verified to match the form, fit, and function of the original BF3 GF120 mass flow controller used on AMAT ion implanters, but it is not an original Applied Materials OEM part and is not sold as one.
BF3 is corrosive and toxic, and its thermal properties differ from inert calibration gases. A unit configured for BF3 service uses a corrosion-resistant wetted path and the correct gas-correction factor, so the displayed flow reflects true delivery and the internal surfaces tolerate the chemistry.
GF120 refers to the controller platform and form factor, covering the electronics, mounting envelope, and command and feedback interface that the MFC presents to the implanter gas box. Matching this designation makes the replacement mechanically and electrically interchangeable on the gas panel.
Typical signs are a flow reading that no longer correlates with beam current, persistent set-point error, slow or oscillating response on recipe changes, creep flow when commanded closed, or intermittent feedback dropouts. These often appear as unexplained dose or arc-stability problems before the MFC is identified as the cause.
The indicative lead time is around 5 days. Because a failed MFC can hold an implanter out of production, many fabs choose to keep this part on the shelf as a critical spare to minimise downtime when a gas-panel fault occurs.
The BF3 5 SCCM GF120 Mass Flow Controller (ESCT P/N ES227-0536) is a precision gas-metering instrument that governs boron trifluoride delivery into the source of an Applied Materials ion implanter. By combining a thermal mass flow sensor, a proportional control valve, and closed-loop GF120 electronics, it holds dopant flow steady at low set points so the arc chamber can produce a repeatable boron beam. Its accuracy and corrosion resistance directly influence beam current, dose uniformity, and tool availability, making a qualified spare a sound investment for any fab running AMAT implant tools.
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 the referenced Applied Materials part. 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.
