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PseudolithIC designs and manufactures radio-frequency integrated circuit (RFIC) chips primarily for RF and mm-wave telecommunication applications. The company utilizes a proprietary heterogeneous integration approach, blending compound semiconductors with silicon onto a single chip. This technical strategy yields high-performance, power-efficient, and scalable RF solutions, including mm-wave power amplifiers, low-noise amplifiers, and T/R front-ends, setting new benchmarks in semiconductor functionality.
The company was co-founded by Dr. Florian Herrault, who serves as Chief Executive Officer, and Prof. James Buckwalter, the Chief Technology Officer. Dr. Herrault brings extensive expertise with over twenty patents in semiconductor and heterogeneous integration packaging. Prof. Buckwalter is a distinguished Professor at the University of California – Santa Barbara and an IEEE Fellow, contributing significant academic and technical insight to the company's core innovations in RF technology.
PseudolithIC targets the evolving telecommunications sector, providing advanced silicon RFICs to meet demands for superior performance and cost-effectiveness. The company's overarching vision is to connect the world through semiconductor innovation, relentlessly pushing the boundaries of RF semiconductor technology and striving to create groundbreaking products that redefine industry standards and capabilities.
Pseudolithic has raised $6.0M across 1 funding round.
Pseudolithic has raised $6.0M in total across 1 funding round.
Pseudolithic has raised $6.0M across 1 funding round. Most recently, it raised $6.0M Seed in January 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Jan 1, 2025 | $6M Seed | — | Entrada Ventures | Announced |
Pseudolithic has raised $6.0M in total across 1 funding round.
Pseudolithic's investors include Entrada Ventures.
# PseudolithIC: Heterogeneous Integration for Next-Generation RF Semiconductors
PseudolithIC designs and manufactures radio-frequency (RF) and millimeter-wave (mm-Wave) integrated circuits using proprietary heterogeneous integration technology.[2] Founded in 2019 and based in Goleta, California, the company addresses a critical gap in the semiconductor market by combining high-performance compound semiconductor chiplets (such as Gallium Nitride and Indium Phosphide) with cost-effective silicon CMOS platforms.[3][4] This approach delivers the performance advantages of traditional monolithic microwave integrated circuits (MMICs) while achieving the scalability and affordability of RF CMOS processes.
The company serves diverse markets including wireless infrastructure, satellite communications (SATCOM), cellular backhaul, long-range radar, aerospace, and quantum computing applications.[2] PseudolithIC's core value proposition is enabling customers to achieve superior RF performance—with noise figures between 1.5 and 2.5 dB and output powers from 1 to 10 watts across C-band to W-band frequencies (6 GHz to 86 GHz)—at lower costs and faster time-to-market than traditional approaches.[2]
PseudolithIC was founded as "the world's first company committed to the commercialization of heterogeneous semiconductor integration as a new approach to radio-frequency integrated circuits."[1] Florian Herrault serves as CEO and co-founder, bringing expertise in both design and fabrication of compound semiconductor technologies.[2]
The company emerged from recognizing a fundamental market inefficiency: RF engineers faced a binary choice between RF CMOS (scalable but performance-limited) and compound semiconductors like GaN (high-performance but costly and difficult to integrate).[1] PseudolithIC's founding insight was that heterogeneous integration—embedding advanced semiconductor chiplets into silicon wafers—could transcend this tradeoff.
Early validation came through government support: the company secured a Phase II SBIR award from DARPA in 2022, demonstrating technical credibility in developing W-band SATCOM solutions.[1] More recently, in January 2025, PseudolithIC raised $6 million in seed funding led by Entrada Ventures, with participation from Foothill Ventures and Uncork Capital, validating market demand and accelerating commercialization efforts.[3]
PseudolithIC operates at the intersection of three powerful trends reshaping RF semiconductors. First, exponential data growth is driving demand for higher-frequency, higher-efficiency wireless solutions—particularly in 5G/6G infrastructure, satellite internet, and edge computing.[4] Second, compound semiconductor maturation has made advanced materials like GaN and InP viable for commercial applications, but traditional integration methods remain costly and slow. Third, heterogeneous integration has emerged as the industry's preferred solution to chip complexity, with major foundries and system companies investing heavily in chiplet-based architectures.
PseudolithIC's timing is strategic: as terrestrial and satellite communications networks scale, the cost and performance constraints of existing RF solutions become untenable. The company's approach directly addresses this inflection point by making advanced RF performance accessible to a broader market. By proving that heterogeneous integration works for RF—a domain historically dominated by monolithic approaches—PseudolithIC is influencing how the broader semiconductor industry thinks about integrating diverse materials and technologies.
PseudolithIC is positioned to become a critical infrastructure player in next-generation wireless communications. The company's 2025 product releases will be a pivotal moment: successful customer adoption and volume production would validate heterogeneous integration as the dominant RF architecture for the next decade. With $6 million in funding and a team of over 15 engineers, the company is well-resourced to scale manufacturing partnerships and expand its product portfolio.
The broader trend working in PseudolithIC's favor is the industry-wide shift toward chiplet-based design and the increasing performance demands of satellite internet, 6G research, and defense applications. As these markets mature, the ability to rapidly integrate cutting-edge semiconductor innovations into cost-effective platforms becomes a competitive necessity. PseudolithIC's early-mover advantage in RF heterogeneous integration positions it to capture significant market share in a sector where performance and affordability have historically been mutually exclusive.
