SENTECH Etchlab 200 Reactive Ion Etcher

Overview

The SENTECH Etchlab 200 is a high-precision, benchtop reactive ion etching (RIE) system engineered for research laboratories and pilot-line semiconductor fabrication facilities requiring reproducible, controllable plasma processing of micro- and nanoscale structures. Based on capacitively coupled plasma (CCP) technology operating at 13.56 MHz, the Etchlab 200 generates directional, chemically assisted physical sputtering through synergistic ion bombardment and radical-driven surface reactions. Its design emphasizes process stability, operator accessibility, and modular scalability—enabling precise etch rate control, anisotropic profile definition, and minimal substrate damage across silicon, silicon dioxide, silicon nitride, III–V compounds, and thin-film metals including Al, Ti, Cr, and Au. The system complies with IEC 61000-6-3 (EMC) and IEC 61010-1 (safety) standards for laboratory equipment and is compatible with cleanroom Class 1000 (ISO 6) environments.

Key Features

• Top-opening chamber lid for rapid, tooling-free wafer loading and real-time visual inspection—reducing downtime and improving process traceability.
• Modular gas delivery architecture supporting 2–12 independently controlled mass flow controllers (MFCs), enabling complex multi-step etch chemistries (e.g., SF₆/O₂, Cl₂/BCl₃, CHF₃/Ar).
• Integrated 600 W RF generator with impedance-matching network optimized for stable plasma ignition and low reflected power across varying process pressures (1–100 mTorr range).
• High-throughput vacuum system comprising a 360 L/s turbo-molecular pump backed by a dry rotary vane pump—achieving base pressure <5×10⁻⁷ mbar and enabling fast pump-down cycles (<90 s from atmosphere to operating pressure).
• Compact footprint (≤0.8 m²) with integrated utilities (gas manifold, RF cabling, cooling lines) designed for space-constrained R&D labs and university cleanrooms.
• Scalable platform architecture: pre-wired interfaces for optional residual gas analysis (RGA), optical emission spectroscopy (OES) for in-situ plasma diagnostics, sample temperature control (SLI), and high-resolution pressure monitoring (TP).

Sample Compatibility & Compliance

The Etchlab 200 accommodates substrates up to 200 mm (8-inch) diameter with standard electrostatic or mechanical clamping configurations. It supports both conductive and insulating wafers—including Si, SiC, GaN, quartz, fused silica, and metal-coated substrates—without requiring custom electrode modifications. Process recipes are fully documented and exportable in CSV format to support GLP/GMP-aligned workflow documentation. While not certified for full production-line qualification, the system meets critical prerequisites for ASTM F2627 (standard guide for plasma etch process characterization) and ISO/IEC 17025-compliant calibration traceability when operated with NIST-traceable MFCs and pressure gauges. All electrical and pneumatic interfaces conform to SEMI S2/S8 safety guidelines.

Software & Data Management

The Etchlab 200 operates under SENTECH’s proprietary ProcessControl™ software suite, running on a Windows-based industrial PC with real-time data logging at 10 Hz resolution. The interface provides full recipe management (step sequencing, parameter ramping, endpoint detection thresholds), event-triggered data capture (RF forward/reflected power, chamber pressure, gas flows, OES intensity), and audit-trail functionality compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, user role-based access control, and immutable log archiving. Export options include ASCII, MATLAB (.mat), and HDF5 formats for integration into statistical process control (SPC) platforms or machine learning pipelines.

Applications

• Anisotropic patterning of silicon MEMS structures (e.g., accelerometers, gyroscopes) using Bosch or cryogenic etch processes.
• Sub-200 nm feature transfer in SiO₂ hard masks for advanced lithography development.
• Selective removal of metal layers (TiN, TaN, Al) in back-end-of-line (BEOL) integration studies.
• Surface functionalization and sidewall passivation of GaN HEMT devices via controlled Cl₂-based chemistries.
• Process window optimization for atomic layer etching (ALE) precursors using pulsed RIE mode (available via firmware upgrade).
• Plasma-induced damage assessment on gate oxides through controlled charge accumulation testing.

FAQ

Does the Etchlab 200 support automatic endpoint detection?
Yes—via configurable OES intensity thresholding (with optional OES module) or RF impedance shift monitoring.
Can it handle 150 mm wafers with standard fixtures?
Yes—150 mm compatibility is natively supported; no adapter required.
Is remote operation possible over Ethernet?
Yes—the system includes TCP/IP-enabled communication with secure SSH and VNC access for supervised off-site monitoring.
What vacuum pump oil maintenance is required?
The backing pump uses dry scroll technology; zero oil consumption or scheduled oil changes are needed.
Are process recipes transferable to larger SENTECH production tools?
Yes—recipe syntax and parameter mapping are consistent with SENTECH’s ICPS and SI 500 series, enabling seamless scale-up path verification.