INFICON IC6 Thin Film Deposition Controller

Overview

The INFICON IC6 Thin Film Deposition Controller is an industrial-grade quartz crystal microbalance (QCM)-based process control instrument engineered for high-precision, real-time monitoring and regulation of thin film growth in vacuum environments. It operates on the piezoelectric resonance principle: as mass accumulates on a 6 MHz AT-cut quartz crystal sensor, its resonant frequency decreases linearly according to the Sauerbrey equation—enabling nanogram-level mass change detection and conversion into deposition rate (Å/s) and cumulative thickness (Å). The IC6 integrates INFICON’s proprietary ModeLock frequency measurement technology, delivering exceptional short-term stability and resolution of 0.00433 Å/s at 100 ms sampling intervals—critical for reactive sputtering, e-beam evaporation, ALD, and optical coating applications where sub-monolayer control directly impacts refractive index, stress, and adhesion performance.

Key Features

• ModeLock frequency detection architecture ensures drift-free, high-reproducibility rate and thickness measurements—even during rapid transients or low-deposition-rate regimes.
• Auto Z-ratio compensation automatically determines and applies the material-specific acoustic impedance factor (Z = ρ·c), correcting for non-Sauerbrey behavior in viscoelastic or porous films—improving absolute thickness accuracy without manual calibration.
• Simultaneous multi-source control: native support for up to six independent deposition sources via integrated DAC outputs (6 standard + 6 optional), enabling precise co-deposition ratio management for compound oxides, alloys, or graded-index stacks.
• Advanced logic engine with 100 user-programmable conditional statements allows closed-loop feedback control (e.g., “if rate < target × 0.95, increase power by 2%”), interlock sequencing, and fault recovery protocols compliant with GLP/GMP documentation requirements.
• Modular I/O architecture: 28 digital inputs, 24 relay outputs, and 14 TTL outputs enable seamless integration with vacuum gauges, shutters, RF generators, and PLC-based system controllers—fully compatible with IEEE 1394, SECS/GEM, and custom SCADA interfaces.
• Onboard data management: internal non-volatile memory stores full process logs, screen captures, and up to 50 distinct recipes—each supporting 200 layers—with timestamped metadata traceable for FDA 21 CFR Part 11–compliant audit trails when paired with validated software configurations.

Sample Compatibility & Compliance

The IC6 supports industry-standard 6 MHz fundamental-mode QCM sensors—including INFICON’s IQM series and third-party crystals meeting IEEE 1788-2017 mechanical and electrical specifications. It accommodates both grounded and floating sensor configurations, with optional 4-meter XIU extension cables for large-chamber installations. The controller meets RoHS Directive 2011/65/EU and conforms to EN 61326-1:2013 (EMC for laboratory equipment) and EN 61010-1:2010 (safety requirements for electrical equipment). Its deterministic real-time response and deterministic I/O latency make it suitable for ISO 9001-certified production lines and USP <1058> analytical instrument qualification (AIQ) protocols.

Software & Data Management

The IC6 operates autonomously but is fully programmable via the optional IC6 Configuration Editor (P/N 781-620-G1)—a LabVIEW®-based Windows® application enabling offline recipe development, logic scripting, DAC mapping, and backward compatibility with legacy XTC/3 configuration files. All operational parameters—including sensor ID, Z-ratio, rate setpoints, layer termination conditions, and interlock thresholds—are stored in human-readable XML format. Raw frequency, rate, and thickness data are exportable in CSV or TDMS format; time-stamped logs include system health diagnostics (temperature, voltage, communication status) required for preventive maintenance planning per ISO 13374-1.

Applications

The IC6 is deployed in R&D and high-volume manufacturing settings requiring deterministic film control: optical filter fabrication (telecom DWDM, AR/HR coatings), semiconductor metallization (TiN barrier layers, Cu seed layers), photovoltaic absorber stacks (CIGS, perovskite), MEMS packaging (low-stress SiO₂ passivation), and aerospace-grade thermal barrier coatings (YSZ). Its multi-sensor averaging capability (up to 8 channels) enables spatial uniformity mapping across large-area substrates—supporting ASTM F1592-22 (Standard Practice for Measuring Thickness Uniformity of Thin Films Using QCM).

FAQ

Does the IC6 support real-time rate feedback to RF or DC power supplies?
Yes—via analog DAC outputs (0–10 V or ±10 V) configured as closed-loop control signals, with configurable PID parameters and derivative filtering to prevent oscillation.
Can the IC6 store and recall deposition recipes with layer-by-layer termination criteria?
Yes—up to 50 recipes, each containing up to 200 layers with independent rate targets, thickness endpoints, source enable/disable sequences, and interlock conditions.
Is Ethernet communication natively supported or only via optional module?
Ethernet is optional (add-on module); standard communication uses isolated RS-232/485 with Modbus RTU protocol for PLC integration.
How does Auto Z-ratio improve thickness accuracy compared to fixed-Z operation?
It dynamically measures the acoustic coupling coefficient during initial deposition, correcting for deviations from ideal rigid-film assumptions—reducing systematic error by up to 3× in organic or polymer films.
What vacuum-compatible QCM sensors are certified for use with the IC6?
INFICON IQM-233, SQC-310-compatible crystals, and any 6 MHz AT-cut quartz sensor meeting MIL-PRF-28802 Class A electrical specifications and ≤1.5 pF shunt capacitance.