FC-D980 AERA FC-D980 Series Multi-Gas Mass Flow Controller

AERA FC-D980 Digital Mass Flow Controller

The AERA FC-D980 is a digital mass flow controller designed for accurate gas delivery in semiconductor process equipment. It combines a piezoelectric control valve, an all-metal sealing structure, and programmable multi-gas calibration. Its digital architecture supports repeatable flow control across multiple gas types and measurement ranges.

The FC-D980 Series covers full-scale flow ranges from 3 sccm to 5 slm, expressed as nitrogen-equivalent flow. It provides analog control and monitoring alongside RS-485 communication. This configuration suits process systems that require precise gas regulation, stable low-flow operation, and clean gas-contact surfaces.

01 | Flow Control Performance

The FC-D980 maintains specified accuracy across its operating range. Its performance profile supports both higher-flow operation and lower setpoints.

• Full-scale flow range: 3 sccm to 5 slm, multi-range, N2 equivalent
• Accuracy from 25% to 100% FS: Within ±1% of set point
• Accuracy from 2% to 25% FS: Within ±0.25% of full scale
• Repeatability: Within ±0.2% of full scale
• Control range: 2% to 100% FS
• Response time: Less than 1 second to within ±2% of set point
• Actual-flow settling time: 0.5 second between set points
• Zero stability: Less than 0.5% of full-scale flow over one year

Accuracy references change with the operating range. Engineers should therefore evaluate the required flow setpoint against the selected full-scale range. A suitable range helps maintain the required control resolution without unnecessarily oversizing the controller.

02 | Programmable Gas Calibration

The FC-D980 supports multi-gas operation through field-programmable calibration. It can store up to eight gas configurations, with up to 11 calibration points per gas.

• Supports multiple gas types through programmable gas calibration
• Stores up to eight gas configurations
• Provides up to 11 calibration points for each stored gas
• Supports multiple full-scale ranges within the product series
• Uses nitrogen-equivalent flow as the stated reference for flow range

When configuring a gas recipe, confirm that the selected gas and calibration data match the actual process requirement. Do not assume that changing the gas selection alone validates every process condition. Verify the applicable calibration, pressure conditions, and full-scale range before commissioning.

03 | Clean Gas Path and Metal-Sealed Construction

Gas-contact material selection is important in semiconductor equipment. The FC-D980 uses double VAR type 316L stainless steel for its wetted construction. Gas-contact surfaces receive electropolishing and ultra-cleaning to a stated surface finish of 1 Ra (0.025 μm).

• Wetted material: Double VAR type 316L stainless steel
• Surface treatment: Electropolished and ultra-cleaned
• Surface finish: 1 Ra (0.025 μm)
• Seal construction: All-metal seals
• Leak integrity: 1 × 10^-10 atm-cc/sec He maximum

The all-metal sealing arrangement avoids elastomer seals in the specified gas-wetted sealing structure. This design is relevant when evaluating gas compatibility, contamination control, and leak integrity in clean process systems.

04 | Piezoelectric Valve and Pressure Limits

A piezoelectric valve regulates gas flow in response to the controller's demand signal. The FC-D980 is available with a normally-open or normally-closed valve configuration. Confirm the required valve behavior when selecting the unit for a specific process or equipment design.

• Valve type: Piezoelectric
• Available valve action: Normally open or normally closed
• Operating differential pressure: 7 to 40 psiD (49 to 275 kPaD)
• Maximum operating pressure: 70 psig (490 kPaG)
• Proof pressure: 140 psig (981 kPaG)
• Heated configuration: Standard unheated version

Operating differential pressure and maximum inlet pressure describe different conditions. Check both values against the actual gas supply and downstream process pressure. The proof-pressure rating is not a normal operating target.

05 | Electrical Interface and Control Integration

The FC-D980 combines analog signals with digital communication for equipment integration. Its electrical interface supports analog setpoint and flow output signals, together with an RS-485 connection.

• Analog input: 0 to 5 VDC
• Analog output: 0 to 5 VDC
• Digital communication: RS-485
• RS-232 support: Available through a converter
• Connector: 20-pin Honda connector
• Positive supply: +15 VDC ±2%, 120 mA minimum
• Negative supply: -15 VDC ±2%, 50 mA minimum
• Maximum power consumption: 1.3 W

Before connecting the controller, verify the equipment-side pin assignment and power supply capacity. Confirm analog signal scaling and communication settings against the system configuration. The RS-232 connection requires a suitable converter rather than a direct assumption of native RS-232 support.

06 | Mechanical and Environmental Data

Parameter	Specification
Model	FC-D980
Manufacturer	AERA
Product series	FC-D980 Series
Product type	Digital piezoelectric metal-sealed mass flow controller
Dimensions (H × W × D)	129 × 38 × 124 mm
Port-to-port dimension	124 mm
Weight	1.0 kg (2.2 lb)
Operating temperature	5 to 45°C (41 to 113°F)
Heated option	No; standard unheated version
Compliance	RoHS
Settling-time reference	SEMI E17-91

Use the stated outline dimensions when checking equipment-panel clearance and mounting space. Confirm the mechanical interface and port arrangement against the applicable outline drawing before preparing gas lines.

07 | Semiconductor Process Applications

The FC-D980 is intended for gas delivery applications in semiconductor manufacturing equipment. Its programmable calibration and metal-sealed gas path support integration into systems that require controlled gas flow.

• Chemical Vapor Deposition (CVD): Regulates process-gas delivery to deposition equipment.
• Physical Vapor Deposition (PVD): Supports controlled gas supply for deposition processes.
• Plasma etching: Controls gas flow for process-gas delivery.
• Diffusion: Supports repeatable gas delivery in thermal process equipment.
• Ion implantation: Provides controlled gas flow within applicable equipment configurations.
• Sputtering: Supports gas regulation in sputtering process systems.

08 | Engineering Checks Before Installation

1. Confirm the flow range: Match the selected full-scale range to the process flow requirement. Check the required setpoint against the 2% to 100% FS control range.
2. Verify gas calibration: Confirm the stored gas selection and calibration data before introducing process gas.
3. Check pressure conditions: Keep differential pressure within 7 to 40 psiD and operating pressure within the stated maximum.
4. Inspect gas connections: Maintain clean connection practices to protect the electropolished gas path from contamination.
5. Verify electrical compatibility: Check the ±15 VDC supply, 20-pin connector, analog signals, and RS-485 interface.
6. Confirm valve action: Select the normally-open or normally-closed configuration that matches the equipment design.
7. Validate flow response: Check settling behavior under the actual gas, pressure, and system conditions after installation.

09 | Maintenance and Process Diagnostics

Stable flow control depends on the gas supply, pressure conditions, electrical signals, and calibration configuration. When measured flow differs from the commanded setpoint, check the complete delivery path before replacing the controller.

• Flow offset: Compare the commanded setpoint with the measured output and verify the selected gas calibration.
• Slow settling: Check upstream pressure stability, downstream restrictions, and gas-line volume.
• Unstable readings: Inspect supply voltage, grounding, signal wiring, and pressure fluctuations.
• Communication faults: Verify RS-485 wiring and the host communication configuration.
• Unexpected valve behavior: Confirm whether the installed unit uses normally-open or normally-closed valve action.
• Long-term drift: Review zero stability and calibration history before changing process setpoints.

The FC-D980 includes multiple alarm and diagnostic functions. Use the applicable equipment documentation to interpret diagnostic indications and determine corrective actions. Avoid opening or modifying the gas-control assembly without an approved service procedure.

10 | Frequently Asked Questions

Q1: How should engineers select the full-scale range for a process with changing flow demand?

Choose a range that covers the highest expected process demand while keeping normal operating points within the specified control range. If the process spends most of its time near the lower limit, review the accuracy specification for the 2% to 25% FS region. For recipes with significantly different flow requirements, evaluate whether separate ranges are necessary.

Q2: What should be checked when a gas recipe is changed in the controller?

Verify the selected gas identity, stored calibration, and applicable calibration points. Also confirm the gas supply pressure and process requirements. A gas selection change should not replace a system-level verification of flow performance.

Q3: Why can the installed controller show different settling behavior from the stated specification?

The stated response time describes controller performance under defined test conditions. Actual system behavior can also depend on upstream pressure stability, downstream volume, tubing restrictions, and the process gas. Check these conditions before treating a longer system settling time as a controller fault.

Q4: What is the practical difference between normally-open and normally-closed valve configurations?

The distinction describes the valve's default mechanical state when its actuating power is removed. Engineers should select the configuration according to the equipment's gas isolation and process safety design. Confirm the required behavior with the system designer rather than assuming both versions respond identically during a power interruption.

Q5: What information should be prepared when replacing an FC-D980 in existing equipment?

Record the full-scale flow range, gas calibration, valve action, operating pressure, connector pinout, analog signal scaling, and communication requirements. Also compare the port-to-port dimension and mechanical outline with the installed unit. These checks help identify configuration differences before the replacement enters service.

Product Summary

The AERA FC-D980 combines digital multi-gas calibration, piezoelectric flow regulation, and an all-metal gas sealing structure. Its 3 sccm to 5 slm range, 0 to 5 VDC analog interface, and RS-485 communication support semiconductor gas delivery systems. For equipment selection, confirm the required gas calibration, full-scale range, pressure conditions, valve action, and electrical configuration.

Contact us for FC-D980 product information, configuration verification, and a quotation.

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