TECHNOLOGY

The Transistor

1947 CE

History · Contemporary · Holocene · Meghalayan

In December 1947, at Bell Labs, a sliver of germanium under two gold contacts amplified a signal: the transistor, a valve with no vacuum and no filament. Its descendants shrank a millionfold, and the MOSFET design of 1959 has since been made in numbers put at more than a quintillion, a billion billion devices. Every computer, phone, car and appliance on Earth is a lattice of these switches.

Why it matters

The transistor is the atom of the information age: Moore's law records nothing more than its repeated halving, and the whole digital world, from the web to AI, is transistors all the way down. Its history also corrects the lone-eureka myth, since decades of semiconductor anomalies and half-working designs were what one industrial laboratory gathered, tested and turned into a single reliable device. By sheer number and by reach, it has a claim to being the most consequential invention of the twentieth century.

Dating & uncertainty

Bardeen and Brattain demonstrated transistor action at Bell Labs in December 1947, and Shockley's junction design followed; all three shared the 1956 Nobel Prize. Historians add nuance: the solid-state amplifier emerged over several decades, out of anomalies noticed in semiconductor crystals and early imperfect designs that Bell Labs gathered and made to work, and the form that came to dominate, the MOSFET of 1959, is often called the most manufactured object in history.

Sources

1. Iwai, Kakushima & Ohmi (2022), The Electrochemical Society Interface · The transistor was invented 75 years ago: a big milestone in human historydoi:10.1149/2.f13224if
2. Brinkman, Haggan & Troutman (1997), IEEE Journal of Solid-State Circuits · A history of the invention of the transistor and where it will lead usdoi:10.1109/4.643644
3. Metzler (2020), SSRN · The transistor, an emerging invention: Bell Labs as a systems integrator rather than a 'house of magic'doi:10.2139/ssrn.3678081

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