Calumet opens first dedicated UHDI PCB substrate facility in Michigan

Calumet Electronics has opened a new ultra-high-definition interconnect printed circuit board facility in Michigan, giving the U.S. its first dedicated panel-level organic substrate plant. The launch adds domestic capacity for AI, defense and advanced computing supply chains as PCBAA calls for more federal support to scale U.S. manufacturing.

Why it matters: - Calumet Electronics’ new Michigan facility adds U.S. capacity for ultra-high-definition interconnect printed circuit boards used in AI chips, cloud servers, medical devices, avionics and defense systems. - The plant is the nation’s first dedicated panel-level organic substrate facility, a capability tied to advanced microelectronics and secure supply chains. - PCBAA says the opening helps reduce U.S. dependence on overseas PCB manufacturing and supports national and economic security.

What happened: - Calumet Electronics recently opened a state-of-the-art UHDI PCB facility in Michigan’s Upper Peninsula. - The facility is the third U.S. UHDI PCB facility built in the past three years. - The Printed Circuit Board Association of America marked the launch as a welcome development for U.S. microelectronics manufacturing. - David Schild, PCBAA’s executive director, said Calumet’s work shows American innovation and helps reverse years of offshoring.

The details: - UHDI PCBs support next-generation AI chips and high-performance computing in data centers and enterprise cloud servers. - The boards are also used in advanced medical devices, avionics, military drones and other military and industrial products. - UHDI design allows more components in smaller spaces, reduces the number of layers and shortens signal paths for better signal integrity. - Calumet’s facility was made possible by a $39.9 million grant through the Defense Production Act Investment program. - In 2023, GreenSource Fabrication LLC received $46 million from the same DPAI program for integrated circuits substrate, HDI and UHDI production and advanced packaging. - In June 2026, TTM Technologies opened a UHDI PCB manufacturing facility in Syracuse, New York. - TTM’s plant supports domestic defense and aerospace electronics, including radar and missile defense systems. - The TTM project was supported by company investment, New York State financial and tax assistance, and a Department of Defense grant for a $130 million plant expansion. - TTM is also planning a $50 million Innovation Center in Eau Claire, Wisconsin. - PCBAA said more American companies need to follow Calumet, GreenSource and TTM to strengthen domestic manufacturing.

Between the lines: - The new Michigan plant reflects a broader U.S. effort to rebuild advanced PCB and substrate manufacturing after decades of offshore production. - PCBAA’s comments suggest the current wave of projects is meaningful but still far smaller than the scale of investment in Asia. - The association is signaling that continued federal funding will be important if U.S. suppliers are going to compete in critical infrastructure and defense markets.

What's next: - PCBAA is urging the U.S. government to keep funding DPAI and other financial programs that support the defense industrial base. - More domestic PCB and substrate projects may follow if federal support continues and companies expand current investment plans. - The new Calumet facility is likely to be watched as a test case for whether U.S. manufacturers can scale UHDI production.

The bottom line: - Calumet’s Michigan plant is a milestone for U.S. microelectronics manufacturing, but PCBAA says the real challenge is turning one-off wins into large-scale domestic capacity.