Micron's Virginia fab begins producing America's most advanced DRAM memory — fab expansion to quadruple output, easing DDR4 shortage for automotive and defense sectors

Micron announced this week that it has begun manufacturing 1α (1-alpha) DRAM at its Manassas, Virginia, facility. This action brings the company's most advanced DDR4-compatible process technology to U.S. soil for the first time. The expansion, which Micron says will quadruple DDR4 wafer output at the site, represents a $2 billion-plus investment supported by $275 million in finalized CHIPS and Science Act funding, and production is expected by the end of the year.

The company is the only manufacturer of memory in the United States, and the Manassas fab specifically serves long-lifecycle customers in the automotive, defense, aerospace, industrial, networking, and medical device sectors.

Micron is scaling up DDR4 production as the supply of the older memory standard has become unexpectedly tight. All three major DRAM producers are reallocating fab capacity toward DDR5, LPDDR5X, and high bandwidth memory (HBM) to meet AI-driven demand from hyperscalers and data center operators. Micron itself issued end-of-life notices for mainstream DDR4 and LPDDR4 products in high-volume consumer and data center segments last year, with final shipments to those customers expected to wrap up in early 2026.

That decision has left industries with long product cycles exposed, and S&P Global Mobility estimated that automotive DRAM contract prices could rise 70% to 100% in 2026 compared with 2025 levels, warning that the supply of older-generation automotive DRAM will begin to dry up sharply by 2028. DDR4 inventory buffers for automotive and industrial buyers have reportedly contracted from over 31 weeks to as few as six to eight weeks.

The 1α process node, which Micron first brought to volume production at its Taiwan fabs in late 2020, delivers roughly 40% higher bit density than the preceding 1z node and was the first DRAM technology to achieve sub-15nm cell dimensions. It uses DUV lithography rather than the more expensive EUV tools that Samsung has adopted for its advanced DRAM nodes. Micron's newer 1β and 1γ nodes are dedicated to DDR5, LPDDR5, and HBM.

Onshoring 1α to Virginia effectively creates a dedicated domestic production line for DDR4 and LP4 memory that won't compete for wafer starts with Micron's leading-edge AI-focused products. The Manassas site will also support more than 3,100 direct manufacturing and community jobs.

The Virginia fab is part of Micron's broader $200 billion U.S. investment plan. The company broke ground on a new memory manufacturing complex in Clay, New York, in January, and initial wafer output at its first new Idaho fab is expected in mid-2027. Micron has also committed to eventually adding HBM advanced packaging capabilities at the Virginia site once sufficient DRAM wafer capacity is established at its other U.S. facilities.

Across all three sites, Micron says the investments will create an estimated 90,000 direct and indirect jobs.

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