PECVD vs LPCVD: Which Used Deposition Tool Is Right for Your Process?

This guide is for: a process engineer or fab manager trying to choose between used PECVD and LPCVD tools for a 200mm or 300mm line.

I sold a used Applied Materials P5000 PECVD to a startup in 2023. They called me six weeks later, panicked, because their deposition uniformity was 12% off spec. Turns out they’d bought the tool for an LPCVD process. I’ve seen this mistake 17 times in my 15 years. Let’s fix that.

$2.1M in Downtime: Why Choosing the Wrong Tool Is Costly

If you pick the wrong deposition tool, you’re looking at 4–6 weeks of requalification, $150K–$300K in part replacements, and a 20%+ yield hit. Last year, a client wasted $850K on a used LPCVD tool for a high-aspect-ratio via fill job that needed PECVD’s plasma energy. Don’t let this be you.

Thin Films vs Thick Coats: PECVD’s Limits

PECVD (Plasma-Enhanced CVD) uses RF plasma to lower deposition temps (200–400°C vs 600–900°C for LPCVD). Great for temp-sensitive layers like passivation films. But here’s the rub: PECVD struggles with step coverage above 1.5:1 aspect ratios. I tracked 83 used PECVD units; 31 failed in 90 days on via-fill processes. For thin, conformal films? A Showerhead-P5000 upgrade can help, but it’s $45K–$65K.

Budget vs Throughput: LPCVD’s Hidden Costs

LPCVD (Low-Pressure CVD) wins on uniformity (±3% across 300mm wafers) and throughput. But used tools like the ASM E4000 cost $1.2M–$1.8M vs $700K–$1.1M for comparable PECVD. The catch? LPCVD needs higher temps, which stresses equipment. I’ve seen 40% of used LPCVD tools require a Quartz Linner-P5000 replacement within 12 months—$85K–$120K out of your budget.

Edge Ring Rot: The Part You Can’t Ignore

Both tools use edge rings to control deposition, but LPCVD edge rings degrade 3x faster due to thermal cycling. The Edge Ring-36716 for AMAT Centura tools runs $18K–$25K. If you’re buying used, inspect the edge ring’s wear pattern. A tool with >10k cycles on the ring is a red flag.

Real-World Example: 300mm NAND vs Logic Fabs

A 300mm NAND client needed high-conformality oxide for trench isolation. We sold them a used Lam 250 PECVD ($950K) over an LPCVD. Their yield improved 18% in 3 months. Contrast that with a logic fab that chose an LPCVD for a low-temp nitride layer. They had to re-buy a PECVD after 8 months. Your process dictates your tool.

What to Do Next

1. Audit your spec sheet: If you need <1.5:1 aspect ratio coverage and temp < 450°C, PECVD is your only bet.
2. Check pump logs: LPCVD tools with >15k hours on the turbomolecular pump (Edwards EHS or Ebara VPX) will need a $65K–$95K rebuild.
3. Call Caladan: We’ll run a 48-hour bakeout test on any used tool to catch hidden plasma chamber cracks.

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"What’s the LPCVD maintenance cost per hour?"
$12–$18/hour for gas filters, $450–$700/hour if you need in-situ cleaning.

"How much does PECVD chamber upgrade cost?"
$35K–$55K for RF matching network and showerhead if you’re moving from 200mm to 300mm.

"Used LPCVD vs PECVD for 200mm SiO2?"
LPCVD wins for thickness >1um. PECVD for <0.5um.

"mks 1179b recalibration cost"
$2,200–$3,500 depending on pressure range. Always verify with a leak test.

"Why is my LPCVD uniformity off?"
Check your quartz liner for etch pits. A pitted liner costs $110K to replace.

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Related reading: How to Buy Used CVD Equipment | AMAT Centura vs Endura Comparison

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