MIT develops computer chips structures itself
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MIT develops computer chips structures itself
The used molecular chains arrange themselves automatically in nanostructures. This can produce very small switching elements relatively cheap. The case is still in experimental stage.
In the process of MIT, tiny molecular chains depend independently on a silicon chip out (Image: MIT).
Researchers at the U.S. Massachusetts Institute of Technology (MIT) are working on a new method by which the production would be cheaper of highly integrated circuits. These molecules are used to organize themselves independently in the chip manufacturing useful nanostructures. This allows relatively inexpensive accommodate smaller circuit elements on a chip.
The procedure is presented in the current issue the journal Nature Nanotechnology. it reaches the market, it could be an alternative to photolithography, which is now used for chip production.
As the MIT Office, is the problem of photolithography, the switching elements are already much smaller today than the wavelength of light used in lithography. For very small structures could be used to replace the electron beam lithography, but this technique is very time consuming and expensive. It is thus sought a method by which you can make the tiny structures efficiently.
The team of scientists led by Caroline Ross and Karl Berggren, the electron beam lithography and share only one to place a “post” at the nanoscale on a silicon chip. Then they carry on so-called binary copolymers. They are large molecules that consist of a chain of two different molecules regularly arranged units.
These copolymers spontaneously attach themselves to the previously set “post” and align themselves in a particular formation, as they want as far away from each other. Berggren explains the behavior of molecules based on the movie “Midnight Run” In him a bounty hunter and a criminal is bound together with handcuffs, but can not stand for death.
By changing shape and arrangement of the “post”, the proportions of the polymer and the length of the molecule chains, you can create different structures. Including those such as are used in chip manufacturing.
If the resulting plasma structure, suspends, burning away a molecular entity that is different to glass. This achieves the same effect as one of resist in electron beam lithography. This changes the resistance of the coating when it is irradiated with light. If you send light through a mask onto a photoresist layer, so that we can create structures. This works similar like a photo negative.
In contrast to the photoresist can be created with the copolymers but much finer structures. can be used industrially until the procedure is, however, still take time. The team of Ross and Berggren is currently working to produce a prototype of a fully functional chips.
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