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Three SMT lines. Closed-loop process control. Class 2 & 3 throughout.
SEI runs three SMT lines plus selective solder, inspection, and test for high-mix, low-volume PCBA to IPC-A-610 / J-STD-001 Class 2 & 3. Line 1 is a fully closed-loop, current-generation Panasonic NPM stack with Viscom 3D AOI for premium work.
SEI MANUFACTURING FLOOR · ANDOVER, CT Premium SMT Line — Line 1
CLASS 2 / 3 · CLOSED-LOOP
Panasonic NPM-GP/L Screen Printer
±3.8 µm positional · ±15 µm wet print · integrated 2D solder paste inspection
2 × Panasonic NPM-W2 Pick & Place
±30 µm QFP placement · up to 84,000 CPH/machine · 03015 metric to 135 mm components · on-board 2D inspection
Vitronics XPM3 Reflow
10 heating + 3 cooling zones · lead-free & SnPb · N₂ capable · closed-loop PID control
Lines 2 & 3 · Inspection
- Line 2 — 2 × Samsung SM421 · Vitronics XPM3
- Line 3 — 2 × Panasonic NPM-W · Vitronics XPM3
- Viscom iS6059 3D AOI — 1 orthogonal + 8 angled cameras, shadow-free inspection
- Scienscope X-Scope 2000 microfocus X-ray — BGA, QFN, package-on-package
Through-Hole · Polymeric
- SEHO SelectLine selective soldering
- Hand soldering to J-STD-001 Class 2 & 3
- Conformal coat — selective & hand-applied
- Staking & underfill per customer process spec
Process Control · Test
- Print (integrated SPI) → place → on-machine 2D → reflow → 3D AOI → X-ray
- Full traceability at every stage
- Functional & system-level test with customer fixtures
- Test development in coordination with customer