Used MEMS Fabrication Equipment Guide: From Deposition to Release
Buying Used MEMS Fabrication Equipment: A Strategic Guide for Modern Fab Managers
At Caladan, we see a growing demand for cost-effective, high-quality used MEMS (Micro-Electro-Mechanical Systems) fabrication equipment. As the MEMS market expands—driven by innovations in IoT, automotive, and healthcare technologies—buyers are increasingly turning to pre-owned systems to meet production needs without the high cost of new tools. However, purchasing used equipment requires a nuanced understanding of MEMS-specific requirements, equipment capabilities, and inspection protocols. In this post, we’ll break down the key considerations for buyers and highlight how Caladan can help you navigate this complex landscape.
MEMS Fabrication vs. IC Manufacturing: Key Differences
At Caladan, we’ve observed that MEMS fabrication diverges significantly from traditional IC manufacturing in three critical areas:
- 3D Structures: Unlike planar ICs, MEMS devices often require vertical structures, such as cantilevers, membranes, or suspended beams.
- Material Diversity: MEMS may use silicon, glass, polymers, or metals, necessitating specialized deposition and etch tools.
- Post-Processing Needs: Wafer bonding, release etching, and sacrificial layer removal are common in MEMS, adding complexity to the fabrication flow.
These differences mean that standard IC tools may not suffice for MEMS, making it essential to source equipment tailored to MEMS processes.
Key Equipment Types for MEMS Fabrication
Deep Reactive-Ion Etching (DRIE) Tools
DRIE systems, such as those using the Bosch process, are the workhorse of MEMS fabrication. They enable high-aspect-ratio etching (up to 20:1) with precise sidewall control.
Wafer Bonders
Critical for creating sealed cavities or multi-layer structures, wafer bonders support anodic, fusion, adhesive, or eutectic bonding methods.
Release Etch Tools
These systems remove sacrificial layers (e.g., oxide or polymer) to free MEMS moving parts, often using wet or dry etching.
Sacrificial Layer Deposition Tools
Used to deposit uniform layers of materials like silicon dioxide or photoresist, which are later etched away to define MEMS features.
Major Manufacturers and Key Models
At Caladan, we’ve curated a network of trusted suppliers for top-tier used equipment. Here are the leading manufacturers and models to consider:
- SPTS Technologies:
- Pegasus DRIE: Renowned for high etch rates (up to 10 µm/min) and precise profile control.
- EV Group (EVG):
- EVG 520: A high-throughput wafer bonder for anodic and fusion bonding.
- EVG 501: A compact bonder ideal for R&D and low-volume production.
- Tegal and Plasma-Therm:
- Specialized in deposition and etch tools for sacrificial layers and release processes.
Price Ranges and What to Inspect
Used MEMS equipment typically ranges from $50K to $500K, depending on the tool type, age, and condition. For example:
- DRIE systems: $200K–$500K
- Wafer bonders: $100K–$300K
- Release etch tools: $50K–$150K
Critical inspection checklist for buyers:
- Chamber Condition: Look for wear, contamination, or misalignment in critical zones.
- RF Matching Networks: Ensure stability for consistent plasma generation.
- Vacuum Systems: Test pump performance and leak rates.
- Bonding Alignment: For wafer bonders, verify precision and repeatability.
- Process Logs: Request historical data to assess tool reliability.
Wafer Bonding: Types and Applications
At Caladan, we see wafer bonding as a cornerstone of MEMS fabrication. Here’s a quick guide to common methods:
- Anodic Bonding: Bonds silicon to glass using heat and voltage (ideal for hermetic seals).
- Fusion Bonding: Directly bonds silicon wafers at high temperatures (used in RF MEMS).
- Adhesive Bonding: Uses polymers or epoxies for temporary or permanent bonds (common in sensors).
- Eutectic Bonding: Combines metal alloys for high-strength bonds (often in harsh environments).
Each method requires specific equipment, so buyers must align their choice with application needs.
DRIE Capabilities: Precision and Performance
Deep reactive-ion etching is vital for MEMS structures like trenches, vias, and cantilevers. Key capabilities to evaluate:
- Aspect Ratio: Up to 20:1 for complex 3D features.
- Etch Rate: Typically 1–10 µm/min, depending on gas mix and power.
- Sidewall Profile: Critical for functional MEMS (angles from 85° to 90° are ideal).
Modern DRIE tools like the SPTS Pegasus also offer advanced passivation layers to prevent microtrenching.
Applications Driving MEMS Demand
The versatility of MEMS has fueled adoption across industries:
- Accelerometers and Gyroscopes: Automotive safety systems, smartphones.
- Pressure Sensors: Medical devices, industrial monitoring.
- Microphones: High-fidelity audio in consumer electronics.
- RF MEMS: Tunable filters and switches for 5G and IoT.
These applications demand equipment capable of high precision and reproducibility—qualities that used systems from reputable manufacturers can still deliver.
FAQ: Common Questions for Buyers
1. Why buy used MEMS equipment?
Used tools offer significant cost savings (up to 70% off new prices) while maintaining the performance needed for R&D and production.
2. How to verify the condition of used equipment?
Request a pre-purchase inspection, review maintenance logs, and test key subsystems like vacuum and RF.
3. What’s the difference between anodic and fusion bonding?
Anodic bonding uses voltage and heat to bond silicon to glass, while fusion bonding directly bonds silicon wafers at high temperatures.
4. What affects the price of used DRIE systems?
Age, etch rate capabilities, and whether the system includes advanced features like automated passivation cycles.
5. Can used equipment meet modern production standards?
Yes, especially if maintained by the original manufacturer or certified service providers.
Ready to Upgrade Your MEMS Fab?
At Caladan, we understand the unique challenges of sourcing and integrating used MEMS equipment. Whether you need a DRIE system for high-aspect-ratio etching or a wafer bonder for hermetic seals, our team is here to help. Request a quote today to find the right tool for your application—and let us help you turn cost savings into competitive advantage.
By prioritizing quality, compatibility, and performance, buyers can successfully leverage used MEMS equipment to scale their operations without compromising on innovation. At Caladan, we’re committed to making this process seamless, transparent, and impactful for your business.
Page last reviewed May 2026. Pricing and availability reflect current 2026 secondary market conditions.