Graphene-on-Diamond Hybrid Integrated Circuits
A Technical Feasibility Analysis with Investment-Ready Specification
This repository contains the technical specification for 32-MLDS, a novel semiconductor manufacturing platform that addresses two fundamental challenges in advanced electronics:
- The Thermal Wall — Power density in sub-5nm devices now exceeds the heat dissipation capability of silicon substrates
- The Mask Tax — Entry costs for advanced lithography masks have reached £8-12M per set, prohibiting low-volume high-performance applications
32-MLDS solves both through femtosecond laser direct writing of graphene circuits on diamond substrates, eliminating mask costs while providing the highest thermal conductivity of any bulk material.
| Field | Value |
|---|---|
| Version | 5.0 |
| Status | Investment-Ready Specification |
| GUID | AG-2026-0105-3558 |
| Author | Aaron Garcia |
| Contact | aaron@garcia.ltd |
├── MLDS-WhitePaper-v5-MasterPapers.docx # Primary specification document
├── generate-mlds.js # Document generation script (docx-js)
└── README.md # This file
The platform exploits femtosecond laser physics to achieve nanometre-scale graphene patterning through a non-thermal ablation mechanism:
- Pulse duration: <100 femtoseconds (shorter than electron-phonon coupling time)
- Resolution: 30-40nm demonstrated via three-photon absorption thresholding
- Throughput: 32-beam parallel writing via Grating Light Valve (GLV) technology
- Quality: Flash Joule Heating post-processing for electronic-grade crystallinity
| Metric | Target | Validation Method |
|---|---|---|
| Thermal Boundary Conductance | >7,000 MW/m²K | TDTR + HRTEM |
| Current Density | 1.8×10⁹ A/cm² | JEDEC breakdown test |
| Feature Size | <100nm (Phase 1) | SEM metrology |
| Raman D/G Ratio | <0.3 | Spectroscopy |
| Phase | Years | Objective | Funding |
|---|---|---|---|
| 1 | 1-2 | Validate FsLDW resolution | £1.35M |
| 1.5 | 2 | Integration pilot (2-beam) | — |
| 2 | 2-3 | Electronic-grade crystallinity | £1.60M |
| 3 | 4-5 | 32-beam parallelisation | — |
| 4 | 6-8 | Device integration | £1.30M |
| 5 | 7-9.5 | Commercial production | — |
Total Programme: 9.5 years | Total Funding: £4.89M (includes 15% Pivot Reserve)
- Aerospace & Defence: Radiation-hardened electronics, space-qualified RF devices
- High-Power RF: GaN-on-diamond alternatives, 5G/6G power amplifiers
- Quantum Computing: Diamond NV-centre integration, cryogenic electronics
- Sensors: High-temperature operation, harsh environment deployment
| Classification | Code | Notes |
|---|---|---|
| Manufacturing Equipment | ECCN 3B001 | BIS licence required |
| Process Technology | ECCN 3E001 | Technology control plan |
| Space-Qualified Devices | ITAR Cat XI | TAA required (18-month timeline) |
UK/US bilateral pathway via Defence Trade Cooperation Treaty for qualifying programmes.
Fragility Score: 32% (reduced from 48% in prior version)
| Factor | Weight | Score |
|---|---|---|
| Integration complexity | 25% | 50 |
| Feedback calibration | 25% | 30 |
| Control loop margin | 15% | 25 |
| Human factors | 15% | 25 |
| Vendor/supply chain | 10% | 35 |
| Regulatory pathway | 10% | 25 |
The 32-MLDS platform operates at the convergence of:
- Femtosecond Laser Induced Graphitisation (FsLIG) — Non-thermal phase transition
- Flash Joule Heating (FJH) — Crystallinity enhancement post-processing
- Gradia Interfaces — Coherent sp²/sp³ hybrid boundary engineering
- GLV Parallelisation — High-power diffractive beam steering
Individual components exist in academic literature; the integrated manufacturing platform represents distinct novelty.
This specification was developed with AI-assisted editing (Claude, Gemini, ChatGPT) used as accessibility tools for data synthesis and editorial refinement. All technical content, intellectual framing, and strategic decisions are the author's own. Manual validation of all citations and calculations has been performed.
Aaron Garcia
Independent Researcher
aaron@garcia.ltd
MIT License — see LICENSE for details.
You are free to use, modify, and distribute this work with attribution.
Document processed via MasterPapers v2.1 protocol