Problem

Inversion Semiconductor is targeting the bottleneck in advanced chip manufacturing: lithography, the process that uses light to pattern circuit features on silicon and one of the most important steps in making chips. As advanced chips demand ever-finer features, existing systems become increasingly complex, expensive, and power-intensive. The economic pain is acute: the most advanced lithography machines are supplied by a single dominant vendor and can cost about $400 million each, while limited throughput constrains fabs’ ability to produce leading-edge chips.

The main use case is high-volume patterning of next-generation silicon—particularly the processors needed for AI and other compute-intensive applications—at or beyond today’s practical scaling limits. Inversion also frames the technology as a way to expand advanced-chip manufacturing capacity in the West and potentially unlock billions of dollars in annual revenue gains for fabs by improving throughput.

Product / Service

The company is building a semiconductor lithography machine and underlying light-source platform, rather than designing or manufacturing chips itself. Its approach is to shrink particle accelerators by roughly 1,000 times and use laser wakefield acceleration: a high-power laser drives plasma waves that accelerate electrons over centimeters instead of the kilometers required by large conventional accelerators. The resulting source is intended to produce bright, tunable extreme-ultraviolet and soft-x-ray light for patterning silicon.

The stated targets include generating 13.5-nanometer EUV light and eventually even shorter wavelengths, doubling transistor density at a given numerical aperture, delivering roughly three times the throughput per scanner, and powering multiple lithography machines from one source. The development roadmap centers on STARLIGHT, a high-power tunable light source, followed by the LITH-0 system for demonstrating silicon patterning. These are development targets rather than commercially validated performance, and the company is also exploring nearer-term use cases such as industrial x-ray imaging and semiconductor mask inspection.

Market

Inversion competes in semiconductor manufacturing equipment, specifically next-generation and EUV lithography. ASML is the incumbent benchmark and dominant supplier of advanced EUV systems; Lace Lithography is a more directly comparable startup alternative, while Applied Materials and Lam Research are adjacent or possible competitors in semiconductor equipment. Inversion’s differentiation is a proposed higher-power, tunable light source that could improve feature scaling, throughput, and system economics.

The company appears pre-commercial and likely pre-revenue rather than a vendor with deployed production tools. Publicly disclosed traction consists of a strategic collaboration with Lawrence Berkeley National Laboratory and the BELLA-LUX accelerator program, initial light-generation prototypes and laser-stability testing, and interest from companies including Tesla and Applied Materials in early applications. It was founded in 2024, joined Y Combinator’s Winter 2025 batch, has a nine-person team in San Francisco, and has publicly reported roughly $500,000 in pre-seed funding; the available materials describe goals, prototypes, and applications under exploration rather than commercial revenue or a production customer.