Abstract
GCI Arachne Gen‑3 v3.4.1 “FORTRESS” is a secure, high‑performance microfluidic interposer designed for next‑generation AI accelerators, HBM4 memory stacks, and 6G/THz‑class systems. The invention integrates a Dyneema‑reinforced recycled‑polymer matrix, aligned BN/BNNT thermal fillers, and a 35% porous microchannel network to achieve 5–15 W/m·K in‑plane thermal conductivity and 1.5–3.0 kW module‑level cooling with a target thermal resistance below 0.015 K/W. The structure maintains silicon‑matched CTE (3.0–4.5 ppm/°C) and <30 µm warpage across a 55×55 mm package, enabling compatibility with CoWoS‑S and glass‑interposer packaging.
Electrically, the design targets Dk 3.0–3.5 and Df <0.005 at 10–30 GHz for HBM4/6G signal integrity, with moisture uptake below 0.2%. A Ti₃C₂Tₓ MXene surface layer provides broadband EMI shielding with a target attenuation >60 dB from 100 GHz to 1 THz, consistent with published MXene THz‑shielding literature. Security is enhanced through a tamper‑responsive encapsulation layer based on Covalent Adaptive Networks (CANs), designed to meet the FIPS 140‑3 Level 4 tamper‑response envelope by degrading conductive paths and enabling rapid (<1 s) zeroization upon peel or probe attempts.
The interposer is fabricated using a low‑cost centrifugal forcespinning process (“Reno Line”), enabling orders‑of‑magnitude lower capital expenditure compared to conventional interposer manufacturing. The final stackup consists of a dense dielectric routing layer, a porous microfluidic core, and a dense mechanical base layer, with 30 µm Cu‑plated vias and MXene shielding applied as a thin surface coat. A minimum viable prototype (55×55 mm, 3‑layer stack) can be produced for approximately $15k over three months, demonstrating TRL 6 readiness.
This disclosure provides the full material architecture, stackup blueprint, process traveler, qualification metrics, and test‑vehicle definition required for fabrication and evaluation of the Arachne Gen‑3 v3.4.1 interposer.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Caldwell, Michael Victor Mr., "GCI Arachne Gen‑3 v3.4.1 “FORTRESS”: A Secure High‑Thermal Dyneema Microfluidic Interposer for kW‑Scale AI and 6G Systems", Technical Disclosure Commons, (March 16, 2026)
https://www.tdcommons.org/dpubs_series/9526