Linking with Light

Having proven their worth in long-distance communications, photons will soon take over inside the computer

11 min read
Illustration by Bryan Christie Design
Illustration: Bryan Christie Design

graphic illustr. Optical Interconnects

Illustration: Bryan Christie
Coming Soon: Optical Interconnects This approach to signal transfer is moving from longer-distance applications, such as linking separate computers, to joining chips within a computer. Click on image for larger view.

The movement of data in a computer is almost the converse of the movement of traffic in a city. Downtown, in the congested core of the microprocessor, the bits fly at an extraordinary rate. But further out, on the broad avenues of copper that link one processor to another and one circuit board to the next, things slow down to a comparative crawl. A Pentium 4 introduced this spring operates at 2.4 GHz, but the data travels on a bus operating at only 400 MHz. The speed picks up again, though, out on the highways of the world’s optical-fiber telecommunications networks. Obviously, the closer engineers can bring the optical superhighway to the microprocessor, the fewer copper bottlenecks can occur, as if you could pull out of your driveway straight onto the Autobahn.

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New Faraday Cages Can Be Switched Off and On

Built out of a novel material called MXene, these cages could block and allow signals as desired

3 min read
New Faraday Cages Can Be Switched Off and On

Radio waves interacting with a MXene film.

Chong Min Koo

Advanced new Faraday cages—the metal mesh enclosures that can block wireless signals—can also be switched on and off for reversible protection against noise, a new study finds.

In addition, these new shields can be easily fabricated through a technique akin to spray-painting, which could help them find use in electronics, researchers say.

Similarly to the way window blinds adjust how much visible light enters a room, engineers want dynamic control over the electromagnetic waves used in wireless communications. This ability would let devices receive and transmit signals when desired but also protect them against electromagnetic interference, such as static and jamming, and help them avoid being spied on.

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How to Stake Electronic Components Using Adhesives

Staking provides extra mechanical support for various electronic parts

2 min read
Adhesive staking of DIP component on a circuit board using Master Bond EP17HTDA-1.

The main use for adhesive staking is to provide extra mechanical support for electronic components and other parts that may be damaged due to vibration, shock, or handling.

Master Bond

This is a sponsored article brought to you by Master Bond.

Sensitive electronic components and other parts that may be damaged due to vibration, shock, or handling can often benefit from adhesive staking. Staking provides additional mechanical reinforcement to these delicate pieces.

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