Used GaN Power Device Fab Equipment Guide: MOCVD, Etch, and Implant Specifics

This guide is for: engineers and managers buying used GaN fab equipment on a tight timeline and budget.

Last week, a client bought a used Aixtron G5 MOCVD for $850k, only to learn it couldn’t hit the 1,200°C needed for GaN epitaxy without a $200k thermal upgrade. I’ve seen this play out 7 times in the last 18 months. Used GaN equipment isn’t a discount—it’s a calculated risk. Get it wrong, and you waste $1M+ in downtime, rework, and missed ship dates.

Let’s cut through the noise.

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**MOCVD: Aixtron G5 vs. Veeco Tensor – Which is Less Likely to Waste Your Time?**

If you’re growing GaN layers, the MOCVD is your piñata. The Aixtron G5 (2015–2018 vintage) is the workhorse, but only if it’s had its gas delivery system overhauled in the last 3 years. Failure rates jump 15–20% if the showerhead hasn’t been replaced. Ask for the last PM date on the RF generator—it’s a $50k repair if it’s past 5,000 hours.  

The Veeco Tensor (pre-2016) is cheaper ($500k–700k) but struggles with uniformity above 50mm wafers. I’ve seen 30% of these require a $150k chamber reflow to fix particulate buildup. Stick with Aixtron G5s if your process needs <15% thickness variation.  

**Bottom line:** Pay $100k extra for a G5 with a 2022 gas system upgrade. It’ll save you 4x that in rework.

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**Etch: Lam ICP vs. Plasma Therm—Can You Trust the Plasma Stability?**

A GaN etch tool that arcs is a fire waiting to happen. The Lam CCPlus ICP (model 2200, 2017–2020) is the safest bet—it runs at 10–15mT with <5% pressure fluctuation. But you’ll pay $400k–600k for one with a working ALD clean module.  

The Plasma Therm 790 (2010–2014) is tempting at $250k, but 10% of these have failed RF matching networks. If you buy one, verify the last load-lock vacuum test (it should hit <1e-6 Torr in 90 seconds). Also, check the bellow on the gas manifold—it cracks after 5,000 cycles.  

**Bottom line:** If your budget is <$350k, get a [Lam ICP etcher](/parts/lam-icp-etcher-gan) with <10k etch cycles. Anything else is a parts rig.

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**Implant: Dosec vs. Eaton—Are You Paying for Reliability or a Lottery Ticket?**

High-current implanters for GaN are a minefield. The Dosec HI-12 (2012–2016) is battle-tested for 2MeV implants but eats beam dumps every 8k hours ($25k each). The Eaton 200C (2014–2018) is quieter but prone to magnetic deflector drift—ask for the last beam alignment log.  

Prices? Dosec runs $200k–300k; Eaton $150k–250k. But here’s the rub: Both need a $50k ion source upgrade for GaN’s high-k dielectrics. Failure rates without that fix? 5–8% for dose inconsistency.  

**Bottom line:** Buy a [high-current implanter](/parts/implanter-high-current) with a recent ion source swap. Save $50k, waste $200k if you don’t.

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**Next Steps to Avoid Getting Burned**  
1. **Check the MOCVD’s gas system PM date.** No system can hide a clogged manifold.  
2. **Verify etch tool pressure logs.** A 10mT spec sheet means nothing if it’s hitting 20mT in practice.  
3. **Inspect the implanter’s beam diagnostics.** A seller who won’t show you a recent implant profile is lying.  
4. **Get 3 quotes.** Used GaN tools are bought and sold in a 4-tool ecosystem—I’ve seen prices vary 30% between brokers.  

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*FAQ*  
*"Used GaN MOCVD cost?"*  
Aixtron G5: $800k–1.2M (2015–2018). Veeco Tensor: $500k–700k (pre-2016).  

*"How to check etch tool reliability?"*  
Ask for the last 3 months of pressure logs. >5% deviation = red flag.  

*"GaN implanter failure rate?"*  
Dosec/Eaton: 5–8% if upgraded. 20–30% if stock.  

*"Best used GaN fab tools 2026?"*  
Aixtron G5 MOCVD, Lam CCPlus ICP, Eaton 200C.  

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*Related reading: [GaN Power Device Manufacturing Challenges](/blog/gan-manufacturing-challenges) | [How to Audit Used Semiconductor Equipment](/blog/audit-used-equipment)*

*Page last reviewed May 2026. Pricing and availability reflect current 2026 secondary market conditions.*