Nano-Master NRE-3500 (A) Fully Automated Reactive Ion Etcher

Overview

The Nano-Master NRE-3500 (A) is a fully automated, benchtop-compatible reactive ion etcher engineered for high-precision, reproducible plasma processing in semiconductor R&D, MEMS fabrication, and advanced packaging laboratories. It operates on the principle of capacitively coupled plasma (CCP) generation, where radiofrequency (13.56 MHz) power applied to the electrode induces ionization of process gases—enabling simultaneous physical sputtering and chemical reaction at the substrate surface. This dual-mechanism enables highly anisotropic etch profiles critical for sub-micron feature definition in silicon, SiO₂, Si₃N₄, metals (e.g., Al, Ti, Cr), and compound semiconductors. The system’s ultra-high vacuum architecture—capable of base pressures down to 5 × 10⁻⁷ Torr within 20 minutes—minimizes residual contamination and ensures stable plasma ignition across extended process runs. Its modular design supports integration into Class 100 cleanroom environments and complies with SEMI S2-0201 safety guidelines for semiconductor equipment.

Key Features

• Stainless steel mainframe enclosure with 13″ top-hinged cylindrical aluminum process chamber (optional stainless steel variant available)
• Showerhead-style gas distribution manifold ensuring uniform plasma density and repeatable etch rate across 300 mm wafers
• Water-cooled and temperature-controllable RF-powered sample stage (−20 °C to +150 °C optional with chiller)
• Real-time monitoring of DC self-bias voltage (up to −500 V), RF forward/reflected power, chamber pressure, and gas flows
• Integrated throttle valve and active downstream pressure control enabling precise regulation over the full operating range (20 mTorr – 8 Torr)
• Optical endpoint detection interface compatible with commercial OES modules for real-time spectral analysis
• Pneumatically actuated lid lift mechanism with interlocked vacuum break and pre-vacuum load lock for wafer transfer
• Four-tier hierarchical access control (Operator / Engineer / Process / Maintenance) with audit-trail-capable user authentication

Sample Compatibility & Compliance

The NRE-3500 (A) accommodates substrates up to 300 mm in diameter and thicknesses ranging from 100 µm to 2 mm, including silicon, quartz, sapphire, GaAs, InP, and ceramic carriers. Its electrostatic shielding, grounded chamber walls, and Faraday-cage-integrated viewports meet IEC 61000-6-3 EMC emission requirements. All internal wetted surfaces are electropolished stainless steel or anodized aluminum, minimizing particle shedding and metal contamination—critical for low-defect-rate processes. The system supports GMP-aligned operation through configurable electronic logbooks, timestamped parameter logging, and exportable CSV/Excel reports traceable to individual recipes. Optional upgrades include ISO/IEC 17025-compliant calibration documentation and FDA 21 CFR Part 11-ready software packages with electronic signature support.

Software & Data Management

Control is executed via a Windows-based LabVIEW application running on an embedded industrial PC. The GUI presents real-time graphical plots of pressure, DC bias, and RF power alongside numeric readouts for MFC setpoints and actual flows. Process recipes—including multi-step sequences with timed gas switching, ramped power profiles, and conditional endpoint triggers—are stored in encrypted binary format with version history. All system events (pump status, interlock triggers, error codes, user login/logout) are logged with microsecond timestamps and retained for ≥90 days. Data export supports UTF-8 CSV, XML, and HDF5 formats; API access (TCP/IP socket interface) enables integration with MES platforms such as CIM300 or FactoryTalk.

Applications

• Anisotropic etching of silicon dioxide and silicon nitride hard masks for CMOS gate stack patterning
• High-selectivity removal of photoresist and polymer residues post-lithography
• MEMS structural release etching in SOI wafers with controlled sidewall passivation
• Pre-deposition surface conditioning of III-V substrates prior to epitaxial growth
• Etch-stop layer definition in TSV (through-silicon via) fabrication workflows
• Research-scale development of atomic-layer etch (ALE) protocols using pulsed RF and synchronized gas injection

FAQ

What vacuum level can the NRE-3500 (A) achieve, and how long does pump-down take?
The system reaches ≤5 × 10⁻⁷ Torr under optimal conditions; typical pump-down to 1 × 10⁻⁶ Torr requires ≤20 minutes with the standard turbo-molecular pump configuration.
Is remote diagnostics or service access supported?
Yes—the embedded PC includes dual Ethernet ports: one for local network integration, the other for secure remote maintenance via TLS-encrypted VNC with two-factor authentication.
Can the system operate in both RIE and plasma-enhanced (PE) mode?
By default, it functions as a CCP-type RIE tool; optional ICP source integration enables hybrid RIE/PE operation for enhanced ion density and lower DC bias applications.
Are consumables and preventive maintenance schedules documented?
Comprehensive PM checklists, torque specifications for RF connections, and OEM-recommended replacement intervals for O-rings, filters, and MFC orifices are provided in the technical manual and updated annually via Nano-Master’s customer portal.
Does the system comply with CE or UL safety certification standards?
The NRE-3500 (A) carries UL 61010-1 and CE marking per Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU, with full test reports available upon request.