The man who invented diamond semiconductors, sold the company to De Beers, bought the IP back, and is now cooling AI servers with synthetic diamonds - 22 years after the idea first struck.
Across semiconductor physics, thermal management, and RF electronics
Preliminary agreement for diamond-cooling manufacturing scale-up
GaN-on-Diamond vs. GaN on silicon carbide - same chip, radically more power
Thermal conductivity isn't a minor spec. In high-power semiconductors and AI compute, heat is the hard ceiling on performance. Diamond removes that ceiling.
W/m·K at room temperature
GaN-on-Diamond radio frequency amplifiers pack more transmit power into smaller cubesats - enabling smaller, cheaper, faster satellites with more capable radios. On January 14, 2025, Akash's diamond-cooled satellite radio achieved orbit with Pixxel, marking the first space deployment of the technology.
Diamond cooling applied to NVIDIA GPU servers reduces chip temperatures by 10-15 degrees Celsius, enables 25% overclocking, doubles server lifetimes, and minimizes thermal throttling. In December 2024, Akash delivered the world's first diamond-cooled GPU servers to NxtGen Datacenter in India under a $27M contract.
Akash Systems launched in 2016 with a clear satellite-first focus: GaN-on-Diamond amplifiers for cubesats and small satellites, delivering communications hardware that beat the competition on power density per kilogram. The space market validated the technology. Satellites don't come home for repairs.
The pivot to AI infrastructure wasn't a pivot at all - it was pattern recognition. The same fundamental problem plaguing satellite radios - concentrated heat in high-power semiconductor junctions - was beginning to strangle AI GPU clusters. When Nvidia's H100 chips started throttling under thermal load in data center racks, Ejeckam had a 20-year-old solution ready to ship.
The market noticed. Khosla Ventures and Founders Fund had already backed the company. When Akash landed a $27M contract with NxtGen Datacenter to deliver diamond-cooled NVIDIA GPU servers in late 2024 - creating what the company calls the world's most energy-efficient AI compute center - it validated the two-market approach that Ejeckam had quietly been building toward since 2016.
The CHIPS Act preliminary agreement for $68.2 million, announced by the Biden administration in November 2024 - including $18.2 million in direct federal funding and $50 million in combined federal and California state tax credits - placed Akash alongside established semiconductor manufacturers as a company worth betting American industrial policy on.
This proposed funding is an important milestone for Akash Systems and for innovative US technology. It validates our vision and strategy, helping us to deliver cutting-edge solutions that address thermal challenges in today's high-performance Compute and communication systems.
- Felix Ejeckam, November 2024By March 2026, Ejeckam was appearing on theCUBE at NYSE discussing AI factories - data centers reimagined as performance-optimized compute facilities where thermal management is not an afterthought but the primary design constraint. He had been saying this for two decades. The industry was finally listening.
Key publication: "3,000+ Hours Continuous Operation of GaN-on-Diamond HEMTs at 350°C Channel Temperature" (2014) - demonstrating field reliability, not just lab performance. View ResearchGate profile
From McKinsey associate to three-time founder, with a detour through De Beers. Ejeckam's career follows the arc of a scientist who figured out the business could be as interesting as the lab.
Associate at McKinsey & Company - one year of management consulting before the entrepreneurial switch
Co-founded Nova Crystals - semiconductor lasers and detectors for Telecom/Datacom markets
Co-founded Group4 Labs and invented GaN-on-Diamond technology - first commercially available GaN/diamond composite wafer
Group4 Labs acquired by Element Six Technologies (De Beers subsidiary)
Head of Defense & Aerospace Business at Element Six Technologies
Co-founded Akash Systems, reacquired GaN-on-Diamond IP, pivoted technology toward satellite comms and AI infrastructure
Named World Economic Forum Technology Pioneer - one of 100 globally selected innovators
Newsweek America's Greatest Disruptors; $68.2M CHIPS Act preliminary agreement; $27M NxtGen contract; WEF Technology Pioneer ongoing
GaN-on-Diamond satellite radio achieves orbit with Pixxel - first space deployment of the technology
Named Goldman Sachs Most Exceptional Entrepreneur at Builders & Innovators Summit, Healdsburg CA
Ejeckam came up through Rice University's electrical engineering program with a focus on semiconductor lasers, then went deep at Cornell - combining EECS with a materials science minor. The combination of device physics, laser science, and materials is the exact foundation GaN-on-Diamond required.
He worked at McKinsey for exactly one year before deciding a lab was more compelling than a boardroom. That pivot produced 80+ patents.
The GaN-on-Diamond layer interface is tens of nanometers thick - narrower than a strand of spider silk. Getting that gap right took years of materials science iteration.
Akash Systems is backed by Peter Thiel's Founders Fund and Vinod Khosla's Khosla Ventures simultaneously - two investors known for backing strong convictions, not consensus plays.
Diamond has the highest thermal conductivity of any known natural material. Ejeckam turned this physics fact - known since the 1960s - into a semiconductor manufacturing process.
During a "No Priors" podcast in 2024, he performed a live demo of diamond thermal conductivity - unusual in an industry where most founders show slides.
He bought back the IP he invented and sold - launching Akash Systems in 2016 to re-commercialize GaN-on-Diamond after its acquisition by De Beers subsidiary Element Six.
"How Diamond Cooling Could Power the Future of AI" - Felix Ejeckam & Ty Mitchell discuss GaN-on-Diamond, AI thermal limits, and a live diamond conductivity demo. (Dec 2024, 42 min)
"AI Factories - Data Centers of the Future" - Diamond cooling's role in AI infrastructure efficiency, GPU temperature reduction, and energy optimization. (March 2026)
Host David Weisburd interviews Ejeckam on Akash Systems - a top AI company backed by Founders Fund and Khosla Ventures. Synthetic diamond technology for AI server cooling. (Jan 7, 2025)
Named at the 14th annual Builders & Innovators Summit in Healdsburg, California. Previous honorees have gone on to lead multi-billion-dollar enterprises.
Featured discussing AI factories and diamond cooling reducing GPU temperatures by 10-15°C in production data centers.
Named one of the Most Exceptional Entrepreneurs of 2025 at Builders & Innovators Summit, Healdsburg CA.
Diamond-cooled satellite radio launched into Low Earth Orbit with Pixxel. First space deployment of GaN-on-Diamond. Over two decades in the making.
$27M contract to deliver world's first diamond-cooled NVIDIA GPU servers to NxtGen Datacenter in India. 25% overclocking capability, double server lifetimes.
Non-binding preliminary agreement for $68.2M in CHIPS Act funding ($18.2M direct + $50M in federal and California state tax credits).
Named one of America's Greatest Disruptors - recognized as a promising innovator on the verge of major breakthroughs.
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