In the semiconductor world, one of the biggest performance bottlenecks is the link between separate chips on a circuit board. The more circuitry you can stuff onto a single chip, the faster it will perform and the less power it will draw-a key consideration in today’s tiny consumer electronics. Large, complex chips, however, have a high failure rate during production, and the main alternative-bonding smaller chips together-requires high temperatures, which lead to defects after cooling. Now Ziptronix, a commercial spinoff of the Research Triangle Institute, has hit upon a better way. The Research Triangle Park, NC-based company has succeeded in pressing together two wafers (the thin sheets of semiconductor material on which computer chips are grown and etched) at room temperature, bonding the chips on one to the surface of the other. Cutting away the donor wafer leaves its chips embedded on the host. Connect the resulting circuits and you have twice the transistors on one chip. The process can be repeated as many times, and with as many different semiconductors (gallium arsenide, indium phosphide), as required. Products built using the technology could be on the market by early 2002.
These materials were meant to revolutionize the solar industry. Why hasn’t it happened?
Perovskites are promising, but real-world conditions have held them back.
Why China is still obsessed with disinfecting everything
Most public health bodies dealing with covid have long since moved on from the idea of surface transmission. China’s didn’t—and that helps it control the narrative about the disease’s origins and danger.
Anti-aging drugs are being tested as a way to treat covid
Drugs that rejuvenate our immune systems and make us biologically younger could help protect us from the disease’s worst effects.
A quick guide to the most important AI law you’ve never heard of
The European Union is planning new legislation aimed at curbing the worst harms associated with artificial intelligence.
Get the latest updates from
MIT Technology Review
Discover special offers, top stories, upcoming events, and more.