Calumet Electronics opens CAST — the first dedicated U.S. panel-level organic substrate plant.

Calumet Electronics on Thursday, 3 September 2026, celebrated the opening of the Center for Advanced Substrate Technology (CAST) in Calumet, Michigan, according to the company’s release opened for this pack. The ceremony brought together legislators, federal officials, Department of War representatives, industry partners and community leaders, the company says. Soft FLAG: “first dedicated panel-level organic substrate manufacturing facility in the United States” and the claim that the nation had ceded the capability entirely to overseas suppliers are company framing — attributed.

The mechanism is the substrate layer that connects a semiconductor die to the system it powers. Calumet’s release states substrates are the enabling layer for advanced radar, electronic warfare, high-speed computing, artificial intelligence and next-generation communications, and that until CAST no U.S. facility could produce advanced organic substrates at scale — Soft FLAG: “at scale” and the zero-capability claim are company. CAST’s Class 1000 clean rooms implement semi-additive processing (SAP) and embedded-trace technologies on a single platform, the company says, aimed at those defense and commercial programs. Soft FLAG: performance and delivery-speed language is company.

Capital and partners: the release calls CAST a $54.7 million public and private investment. Named actors include Dr. Meredith LaBeau, Calumet’s chief technology officer; U.S. Senator Elissa Slotkin, quoted on semiconductor components made in Michigan and on Upper Peninsula grit; and John W. Mitchell, president and CEO of the Global Electronics Association, quoted on restoring advanced packaging and substrate capability in North America. Equipment and process partners listed include Northrop Grumman Mission Systems, KLA Corporation, SCHMID Group, MacDermid Alpha Electronic Solutions, Schmoll, ASMPT NEXX, Benmayor, Wise, Moyle Construction, Warner Norcross and DuPont. Federal, state and regional support cited includes the Air Force Research Laboratory, the Department of War, InvestUP and the Michigan Economic Development Corporation’s Michigan Business Development Program grant. Soft FLAG: “more than 25 partners” is company count.

Workforce and ownership colour from the same release: Calumet Electronics employs more than 290 people in a Michigan HUBZone community; existing employees are being upskilled into advanced substrate roles; partnerships with Michigan Technological University and SmartZone partners are cited for a path from classroom to cleanroom. Soft FLAG: the company states it is America’s only certified HUBZone printed-circuit-board and organic-substrate supplier and 100 percent American-owned with zero offshoring — company claim. Soft FLAG: historical chip-share figures in the release (America once nearly 40 percent of the world’s chips; by 2022 about 10 percent, and zero for the most advanced packages) are company narrative, not independently checked in this pass. Soft FLAG: place colour on Calumet’s copper-mining past and Keweenaw winters is company storytelling.

Geography and address colour from the company footer: Calumet Electronics lists 25830 Depot Street, Calumet, MI 49913. Soft FLAG: Senator Slotkin’s quote rounds the investment as a “$54 million” figure against the company’s $54.7 million — desk keeps $54.7 million as the company total and notes the round.

What to watch without mood: first published CAST production lots or defense-program qualifications; any MEDC or AFRL follow-on notices; workforce headcount updates beyond the 290 baseline.

Floor: Calumet CAST open 3 Sep — first dedicated U.S. panel-level organic substrate facility (co.); Class 1000 SAP clean rooms; $54.7m public-private.