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Hybrid Chips of Gallium Nitride and Silicon

MIT engineers integrate two semiconductors that don't ordinarily mix

3 min read

This story was updated on 23 September.

22 September 2009—Researchers at MIT say they've made a big step toward combining the capabilities of the silicon used in computer chips with properties of the compound semiconductors found in lasers and high-powered electronics. In the October issue of IEEE Electron Device Letters, they report having figured out how to add devices made from compound semiconductors to a silicon chip, in a way that's compatible with standard silicon manufacturing processes.

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The Transistor at 75

The past, present, and future of the modern world’s most important invention

1 min read
A photo of a birthday cake with 75 written on it.
Lisa Sheehan

Seventy-five years is a long time. It’s so long that most of us don’t remember a time before the transistor, and long enough for many engineers to have devoted entire careers to its use and development. In honor of this most important of technological achievements, this issue’s package of articles explores the transistor’s historical journey and potential future.

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