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According to the report of the American Institute of Electrical and Electronics Engineers "Spectrum" magazine on the 11th, NASA cooperated with the Korea Institute of Science and Technology (KAIST) to develop a self-healing transistor. The researchers said that the latest self-healing technology helps to develop a single-chip spacecraft that can fly at one-fifth of the speed of light and reach its nearest star “neighboring star†within 20 years.
On April 12 this year, Hawking announced the launch of the "Breakthrough Shooting Stars" program, which will be built in cooperation with Russian businessman Yuri Milner and Facebook founder Mark Zuckerberg to build light at one-fifth speed (60,000 kilometers per second). Flying miniature spaceship. However, whether this miniature interplanetary spacecraft can “stumble over†20-year space flight is still in doubt, because NASA's research shows that high-energy rays in the universe can cause positive charges to accumulate, destroy the silicon dioxide layer of the chip, and damage the performance of the equipment. Eventually it caused the spacecraft to fail.
In order to solve this problem, NASA put forward many solutions: First, adjust the route to avoid high-energy radiation area, but this may cause the voyage to increase for several years, and it does not necessarily guarantee that the spacecraft will not be exposed to radiation; the second is to install protective layers on electronic components. However, this will increase the weight and size of the spacecraft and lead to a decrease in speed; the third is to create self-repairing silicon chips.
The research team recently submitted this new result at the International Electronic Equipment Conference held in San Francisco. This "gate-wrap" nanotransistor uses nanowires rather than the usual fin-shaped channels as transistor channels. The "gate" that opens or closes the charge flow through the channel completely surrounds the nanowires, and an extra contact is added to the gate. The current can flow, so that the current heats the “gate†and the channel it surrounds, repairing the damage caused by the radiation.
KAIST claims that this nanowire transistor is not easily "harmed" by cosmic rays, and the "bulkhead" is also very small, which is very suitable for manufacturing space flight equipment. According to the researchers, chips that can be self-healed after undergoing radiation damage are expected to revolutionize the way of space exploration. In the future, large-scale detectors may no longer be required for distant star travel. However, for now, reducing the cost of this technology is the key to its practical application. (Reporter Liu Xia)
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