ECL Mini‑Fab

Compact space‑deployable cylindrical semiconductor facility for sub‑nanosecond Emitter‑Coupled Logic

Facility Snapshot

Form Factor

Ø 2.5 m × 4 m cylindrical shell (fits a 4 m payload fairing).

Launch Mass

< 6 t fully loaded — single ride on Falcon 9, Ariane 6 or LM 5B.

Clean Environment

ISO Class 6 interior; positive N₂ purge; modular HEPA cassettes.

Automation

1 × dual‑arm cobot (ABB YuMi class) for wafer handling & cassette loading.

Power Draw

< 15 kW peak (process) / 4 kW idle — compatible with 10 kW solar array + battery.

Core Equipment Stack

  • 2 × Rapid Thermal Processors (RTP) – 200 mm, 1 200 °C, N₂/O₂/H₂O ambient.
  • Laser Annealing Station – KrF 248 nm, 0.6 J cm‑2, 300 mm × 300 mm scan field.
  • Wet Bench – HF last, RCA SC‑1/SC‑2, spin‑on dopant dispense.
  • Spin Coater & Hotplate – photo‑resist & SOD.
  • Maskless Direct Writer – 5 µm contact lithography.

Process Flow (1 µm Vertical NPN)

StepToolPurpose
LOCOS isolationRTP wet O₂0.5 µm field oxide
Buried n⁺ layerIon implant + furnaceReduce RC‑sheet
Epitaxial collectorRPCVD1.0 µm, 0.2 Ω cm
Base implantLaser B pocket80 nm p‑box (box profile)
Emitter implantRTP spike50 nm As activation
MetallisationAl sputter1 µm single layer

Mask Set (7 layers)

  1. Active + LOCOS
  2. Buried layer implant
  3. Emitter/Collector n⁺
  4. Laser base pocket
  5. Contact/Via
  6. Metal 1 (Al)
  7. Passivation / Bond pads

Performance Targets

Device

  • fT: 8‑12 GHz
  • β: 40‑80
  • BVCEO: 6‑8 V

ECL Gate

  • tPD: 500‑600 ps
  • Power: 1.2 mW/gate (‑3.3 V rail)

Process Repeatability

  • Wafer‑to‑wafer variation ≤ ±5 %
  • Cycle‑to‑cycle consistency > 99 %

Why ECL?

  • Radiation‑Hard by Physics — bipolar differential pairs have negligible single‑event upset, perfect for LEO/GEO avionics.
  • Ultra‑Low Jitter — constant tail current, no saturation.
  • Temperature Resilience — maintains sub‑ns delay from ‑55 °C to +125 °C.
  • Space Logistics — full fab ships in one rocket launch, enabling on‑orbit or lunar additive manufacturing of ASICs.
© 2025 ECL Mini‑Fab Concept.
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Technology
Microelectronics Consulting Services
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Eesti Words
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Technology
Microelectronics Consulting Services
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Eesti Trainer 2
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, Estonia, EU

Contact

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(972) 547393097