MERIDIAN

Codename: Solid-State Multi-Modal Metrology Node | Status: CONCEPT | Classification: UNCLASSIFIED

Overview

**SYSTEM CLASSIFICATION** Solid-State Multi-Modal Metrology Node (Project MERIDIAN). **PRIMARY MISSION** To deliver GPS-independent absolute navigation and deep-penetration spatial intelligence by fusing nano-g gravimetry, quantum magnetometry, and atmospheric muon scattering into a single, high-yield foundry-manufactured node. **INDUSTRY CHALLENGE** Quantum and high-precision metrology systems—such as Nitrogen-Vacancy (NV) diamond magnetometers and nano-g gravimeters—are traditionally confined to bespoke, climate-controlled laboratory environments. Scaling these sensitive architectures for tactical field deployment universally fails due to optical packaging drift, thermal instability, and the inability to maintain extreme vacuum environments at the micro-scale, rendering mass production physically and economically impossible. **HIGH-LEVEL SOLUTIONS** • **Wafer-Level Vacuum Packaging (WLVP):** Utilizes Silicon-on-Insulator (SOI) wafers and Deep Reactive-Ion Etching (DRIE) to carve geometric anti-spring suspensions, which are then anodically bonded to borosilicate caps with Non-Evaporable Getters (NEG). This permanently locks in a high-vacuum environment to ensure the extreme Q-factor required for nano-g sensitivity. • **Silicon Optical Bench (SiOB) Alignment:** Abandons unstable injection-molded optical housings in favor of KOH wet-etched silicon V-grooves. This guarantees permanent, sub-micron passive alignment of the 532nm VCSEL pump, the NV-Diamond quantum chip, and the avalanche photodiode across extreme tactical temperature swings. • **Scintillation & Sensor Fusion:** Integrates light-tight Polyvinyl Toluene (PVT) muon scintillators and silicon photomultipliers (SiPMs) for deep-penetration atmospheric particle tracking, fusing gravity, magnetic, and muon data into an un-jammable Kalman filter vector. • **Foundry-Direct Translation:** Replaces hand-tuned assembly with a deterministic manufacturing flow utilizing existing 200mm/300mm CMOS semiconductor tooling, advanced photonic packaging, and standard Surface Mount Technology (SMT). **TARGET APPLICATIONS** • **GPS-Denied Navigation:** Absolute spatial positioning for submerged autonomous underwater vehicles (AUVs) and subterranean drones without external RF signals. • **Subsurface Intelligence:** Un-jammable deep-earth bunker and tunnel detection via intersecting gravity and muon scattering anomalies. • **Passive Anti-Submarine Warfare (ASW):** High-density, persistent magnetic anomaly detection networks leveraging picotesla quantum sensitivity. **PROJECTED PERFORMANCE OBJECTIVES** • Gravimetric Sensitivity: Sub-nano-g resolution maintained via WLVP and high-Q mechanical isolation. • Magnetic Fidelity: Picotesla sensitivity achieved via room-temperature NV-center quantum defects and precise SiOB optical coupling. • Manufacturing Yield: >99% deterministic end-of-line yield enabled by automated, immutable testing gates (structural, quantum fidelity, and muon coincidence). **PARTNERSHIP & NDA-GATED TECHNICAL BRIEF** • **Development Status:** Preliminary Manufacturing Concept & Foundry Blueprinting. • **Collaboration Request:** Seeking semiconductor foundry partners, strategic defense investment, or co-development licensing. • **Notice:** Specific Bosch DRIE aspect ratios, getter activation thermodynamics, SiOB crystalline etch tolerances, and FPGA sensor-fusion algorithms are available only under NDA.

Technical Specifications

  • DESIGNATION: TERRANEX MERIDIAN
  • DEVELOPMENT STATUS: In Development
  • INTELLECTUAL PROPERTY: Trade Secret / Foundry SOP
  • TECHNICAL REVIEW: NDA Required
  • PRIMARY FUNCTION: Un-jammable Absolute Navigation and Multi-Modal Metrology
  • SYSTEM ARCHITECTURE: MEMS WLVP Gravimeter, SiOB NV-Diamond Magnetometer, and SiPM Muon Scintillator
  • TECHNOLOGY CATEGORY: Quantum Sensing & Advanced Semiconductor Packaging
  • CORE PLATFORM: Solid-State Multi-Modal Metrology Node
  • INTEGRATION STRATEGY: 200mm/300mm Foundry Tooling and Automated SMT Assembly
  • MANUFACTURING PATH: Bosch DRIE, Anodic Bonding, KOH Wet-Etching, and Ion Implantation
  • SCALABILITY PROFILE: Deterministic high-volume manufacturing utilizing existing telecom and CMOS lines
  • TARGET APPLICATIONS: GPS-Denied Navigation, Subterranean Mapping, ASW Anomaly Detection
  • COMMERCIAL PATHWAY: Licensing / Acquisition / Co-Development
  • PARTNERSHIP STATUS: Open
  • INVESTMENT STATUS: Seeking Strategic Partners
  • TECHNOLOGY READINESS: Preliminary Manufacturing Concept

Deep Technical Overview

For decades, the strategic advantage of advanced metrology—specifically nano-g gravimetry and quantum magnetometry—has been trapped inside climate-controlled laboratories. While the physics of Nitrogen-Vacancy (NV) diamond centers and micro-electromechanical (MEMS) geometric anti-springs are well established, transitioning these highly sensitive architectures into ruggedized, field-deployable tactical nodes has historically failed. Conventional assembly relies on artisanal, hand-tuned optical alignment and bulky external vacuum chambers, making mass production economically and physically impossible.

Project MERIDIAN bridges the gap between theoretical quantum physics and deterministic industrial manufacturing. The architecture abandons bespoke assembly in favor of standard 200mm/300mm semiconductor foundry tooling, advanced photonic packaging, and automated Surface Mount Technology (SMT).

To achieve nano-g sensitivity, the system's gravimeter utilizes Deep Reactive-Ion Etching (DRIE) on Silicon-on-Insulator (SOI) wafers to carve out heavy proof masses suspended by ultra-thin geometric anti-springs. The critical manufacturing breakthrough is Wafer-Level Vacuum Packaging (WLVP). Rather than relying on external vacuum pumps, the silicon layer is anodically bonded to a borosilicate cap containing sputtered Non-Evaporable Getters (NEG). Upon thermal bonding, the getter activates and absorbs residual outgassing, locking the MEMS structure in a permanent, extreme-vacuum environment. This ensures the exceptionally high mechanical Q-factor required to detect microscopic gravitational anomalies.

Simultaneously, the node deploys a room-temperature quantum magnetometer utilizing NV-centers created via targeted 14N+ ion implantation and rapid thermal annealing in electronic-grade CVD diamond. To eliminate the severe thermal drift and misalignment that plagues traditional optical housings, MERIDIAN leverages Silicon Optical Benches (SiOB). By applying KOH wet-etching along precise silicon crystalline planes, the architecture creates perfect geometric V-grooves. These grooves passively and permanently align the 532nm VCSEL pump laser, the NV-Diamond chip, and the avalanche photodiode to within sub-micron tolerances, maintaining quantum fidelity across extreme tactical temperature swings without active realignment.

Complementing the gravimetric and magnetic sensors, the node incorporates Polyvinyl Toluene (PVT) scintillators coupled with Silicon Photomultipliers (SiPMs) to detect high-energy atmospheric muons. By combining absolute gravity, localized magnetic fields, and muon scattering data into a unified Kalman filter running on a localized FPGA, MERIDIAN establishes an un-jammable, multi-domain spatial observation vector.

This triad of sensors provides an absolute reference frame that cannot be spoofed, jammed, or degraded by electronic warfare. Because the system relies entirely on proprietary SiOB etch tolerances, exact anodic bonding voltages, and precise getter activation thermodynamics, the detailed manufacturing Standard Operating Procedures (SOPs) and exact foundry process flows are strictly withheld and accessible only under formal non-disclosure agreements.