Company overview
Acorn Semi, LLC is a U.S. semiconductor intellectual-property company and a wholly owned subsidiary of privately held Acorn Technologies Inc., founded in 1998 and headquartered in La Jolla (San Diego), California. Acorn Semi's patent filings list Palo Alto, California addresses; the parent operates through subsidiaries including Acorn Semi and PHY Wireless. Acorn Technologies is not publicly traded, and no reliable revenue figure has been published. Third-party databases give conflicting headcount estimates — from single-digit employees in a California EDD filing to 50–200 in commercial databases. Chairman is Peter Norton; CEO is Tom Horgan.
Products / services / operations
Acorn Technologies describes itself as a "product-oriented" innovator that develops and licenses semiconductor process and wireless technology rather than manufacturing chips; it has no fabrication facilities of its own and contracts outside labs for R&D support. Acorn Semi's portfolio centers on metal–semiconductor contact structures (thin metal-oxide interfacial layers that lower contact resistance), strained-silicon/SOI engineering, RF NFETs, and strained-semiconductor photonics and solar devices. Its wireless arm, PHY Wireless, covers 4G/5G positioning and spectral-efficiency IP. The company has cited nearly 200 issued and pending patents across semiconductor process and wireless communications.
Patent-litigation posture
The tracked record shows Acorn Semi almost entirely as a patent owner: one district-court suit as plaintiff and five PTAB matters in which it is the patent owner (all Samsung-filed IPRs). It does not appear as a district-court defendant facing NPE suits, and it has no meaningful two-way litigation footprint. This matches a licensing IP holder enforcing a self-developed portfolio rather than an operating manufacturer under attack. Its sole infringement suit was filed in the plaintiff-friendly Eastern District of Texas, Marshall Division.
Notable cases
In Acorn Semi, LLC v. Samsung Electronics Co. et al., No. 2:19-cv-00347 (E.D. Tex., filed Oct. 23, 2019), Acorn asserted patents on low-resistance metal-semiconductor junctions. A May 2021 Marshall Division jury found infringement of asserted claims of the '336, '167, '691 and '395 patents and awarded $25 million; the parties settled in January 2023 during Samsung's Federal Circuit appeal. Samsung's parallel IPRs (e.g., IPR2020-01264, -01279, -01282) yielded mixed PTAB outcomes that were appealed.