SkyWater Fab 25

SkyWater Technology (IonQ) · East Ben White Blvd, Austin · Travis County

Fab 25 is a 200mm wafer fab in southeast Austin that SkyWater Technology bought from Infineon on June 30, 2025, and that came under IonQ when IonQ closed its purchase of SkyWater on July 31, 2026. It turned a captive Infineon plant into open US foundry capacity of about 400,000 wafer starts a year at 130nm to 65nm, owned by a DMEA Category 1A Trusted Foundry company.

1990sAMD builds Fab 25 and runs K6 and Athlonlines 2003AMD moves Fab 25 into flash venture withFujitsu 2004Venture renamed Spansion 2015Cypress Semiconductor merges with Spansion 2020Infineon acquires Cypress Jun 30, 2025SkyWater buys Fab 25 from Infineon Jan 26, 2026IonQ agrees to buy SkyWater for $1.8B Jul 31, 2026IonQ closes the SkyWater purchase
Owner
SkyWater (IonQ)
Wafers
200mm
Nodes
130nm to 65nm
Capacity
400K starts a year
County
Travis
Sector
Chips and fabs

Overview

A Captive Infineon Fab Became an Open US Foundry

SkyWater paid $73 million at closing plus about $20 million for working capital, and about 1,000 Fab 25 employees moved to SkyWater. Infineon signed a four-year take-or-pay supply agreement to keep its automotive and industrial wafers in Austin; Infineon made up 43% of SkyWater revenue in 2025. Fab 25 adds copper interconnects, 65nm infrastructure and high-voltage technology for microcontrollers, memory, mixed-signal, radio frequency (RF) and power chips.

IonQ paid $15.00 in cash and 0.4883 IonQ shares for each SkyWater share, about $1.8 billion in all. SkyWater keeps its name as an IonQ subsidiary under CEO Thomas Sonderman, who reports to IonQ Chairman and CEO Niccolo de Masi, and says it will keep serving all foundry customers.

Profile
OperatorSkyWater Technology, an IonQ subsidiary
Address5204 East Ben White Blvd, Austin
CountyTravis
Wafer size200mm
Process nodes130nm to 65nm
CapacityAbout 400,000 wafer starts a year
Employees at transferAbout 1,000
Anchor customerInfineon, four-year take-or-pay agreement
Purchase from Infineon$73M at close plus about $20M working capital

Defense

SkyWater's Trusted Accreditation Rests on Its Minnesota Fab

The Defense Microelectronics Activity (DMEA) of the Department of Defense accredits Trusted suppliers site by site. SkyWater's Bloomington, Minnesota fab holds Category 1A accreditation, and its 10-K lists its Kissimmee, Florida packaging plant as in process. Fab 25 does not appear in public accreditation records as of October 2026. In Texas, Qorvo's Richardson fab is the Category 1A Trusted foundry.

The Department of Defense has committed up to $170 million since 2019 to SkyWater's RH90 radiation-hardened 90nm process in Minnesota, based on MIT Lincoln Laboratory technology. Rad-tolerant commercial chips from 200mm fabs such as Fab 25 go to the Texas A&M Cyclotron Institute in College Station for heavy-ion testing before they fly on satellites. Texas missile defense manufacturing is covered at Golden Dome Texas Corridor.

Market

Mature Nodes Are Where China Is Adding Capacity

Chips at 130nm to 65nm run engine controllers, sensor interfaces, motor drivers, power management and the analog parts in satellites and missiles. China has added more mature-node capacity than any other country in recent years, led by SMIC, Hua Hong and Nexchip, with state support from the National Integrated Circuit Industry Investment Fund. The Office of the US Trade Representative opened a Section 301 investigation into Chinese legacy chips in December 2024. Fab 25 is domestic 200mm capacity that defense primes and automakers can use without sending wafers to Taiwan, South Korea or China.

Quantum

IonQ Bought a Foundry to Make Its Own Quantum Chips

IonQ builds trapped-ion quantum computers and bought SkyWater to control wafer fabrication and packaging for its quantum processors. SkyWater's Minnesota fab already runs superconducting and other specialty processes, and Fab 25 adds volume 200mm capacity for the control electronics and mixed-signal parts quantum systems use. Defense and commercial foundry work continue under the subsidiary.

Record

Dataset Record

Sources
SkyWater Technology (press releases and FY2025 10-K), IonQ, Business Wire, Quantum Insider, Quantum Computing Report, Twin Cities Business, IEEE Spectrum, MIT Lincoln Laboratory, Office of the US Trade Representative, Wikipedia (Spansion)
Last verified
October 2026