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Melting Microchip Defects May Extend Moore's Law

Posted by kdawson on from the moore-the-merrier dept.

schliz lets us know about research out of Princeton on melting away defects on microchips using a laser. The new technique, termed Self-Perfection by Liquefaction (SPEL), was published in the May 4 issue of Nature Nanotechnology. Researchers have traditionally approached chip defects by trying to improve the microchip fabrication process, but this eventually reaches fundamental physical limits to do with random behavior of electrons and photons. By focussing on fixing defects, the new method enables more precise shaping of microchip components, and engineers expect to dramatically improve chip quality without increasing fabrication cost. The before-and-after images are remarkable. Here's a diagram of how the process works.

6 of 99 comments (clear)

  1. read the article by emj · · Score: 4, Informative

    here is a larger version

  2. Corrected picture link by bopo_the_mofo · · Score: 5, Informative

    here... http://www.princeton.edu/pr/pictures/a-f/chou/Chou_micrographs.jpg

  3. Better Before and After by Garganus · · Score: 4, Informative

    better link: http://www.princeton.edu/pr/pictures/a-f/chou/

  4. quick explanation by anmida · · Score: 5, Informative

    I'm a materials scientist, so hopefully I can explain this quickly for you all :)

    The images that are given (before and after) are some scanning electron microscope images. Think optical microscope except with electrons. Anyway, there is a serious improvement in the structure - the edges are a lot cleaner and more defined. This is a really simple and beautiful way of letting Nature do the hard work for us. What this is doing is liquifing the material and letting surface tension pull it into the lowest-energy configuration (least amount of surface area locally).

    It's really a neat way of doing it, because fabrication is really tough - uses either chemical etching or some method of particle bombardment to remove atoms. There's a big trend in matsci to build down, and build up, at the same time at the nanoscale. Think of this as the "error-correction" process after fabrication.

    --This is not the same as annealing - annealing is a solid-state process, putting energy into the material to enable atoms to move and remove stress and other small defects from the material.

    Hope that helps :)

  5. Re:Misleading title? by teslar · · Score: 3, Informative

    I doubt it could fix a "real" defect
    Irregular shapes are a "real" defect. From the first paragraph of TFA:

    even tiny defects in the lines, dots and other shapes etched on them become major barriers to performance
  6. Here's what annealing does in glass. by ahfoo · · Score: 3, Informative

    One of my dozens of hobbyist hats is my glassworkers hat and annealing is a big deal in glasswork. From my experience with glass, I would say that annealing is probably the wrong term because this involves an actual deformation. Typically in annealing you want to stay below the point at which deformation occurs and your main concern is to create a gradual change in the temperature over time in order to eliminate internal stresses. So that's probably not the best word to use in this case since this is not about alleviating internal stresses but actual changes in the shape of the product.