Professor Cyril Hilsum, the British physicist whose career spanned the birth and maturation of the semiconductor industry, has died at the age of 100, according to an obituary published by Electronics Weekly under the headline "Professor Cyril Hilsum 1925-2026."

The dates in the announcement frame one of the longest lives in the history of the electronics discipline: born in 1925, Hilsum's working life ran from the valve era through the transistor, the integrated circuit and the compound-semiconductor advances that underpin today's optoelectronics and display industries.

What do we know so far?

The Electronics Weekly notice confirms only the essential facts of his passing — his name, the birth year 1925 and the year of death, 2026. The full obituary text was not yet accessible at the time of this dispatch, and we will update this story as details of his life, career and surviving family become available from the publication and from the UK engineering institutions with which he was associated.

Why does his generation matter to today's industry?

Hilsum belongs to the cohort of British postwar physicists who built the foundations of semiconductor science in the UK at a time when the country hosted a substantial domestic device industry. Researchers of his era worked through the transition from germanium to silicon and into III-V compound materials — the science base from which today's RF, photonic and display supply chains grew.

A centenarian's passing necessarily prompts reflection on how much of the institutional knowledge of that founding generation now survives only in the published literature. For an industry currently pouring hundreds of billions of dollars into new fabs and advanced nodes, the historical thread back to researchers like Hilsum remains a reminder that today's capacity figures rest on physics worked out in mid-century British laboratories.

We expect fuller tributes from the Royal Society, the Institute of Physics and Electronics Weekly's own science correspondents in the coming days, and this dispatch will be revised with confirmed biographical detail, his research contributions and institutional affiliations as they are published.