IBM has come up with effective and safe method for recycling silicon


30/10/2007

IBM has announced that it has developed a more environmentally friendly way of recycling precious silicon that is rejected in the production of microchips.

Silicon wheels (known as the substrate) used in the production of microprocessors and other types of circuits. Electric printed circuit on a silicon substrate, then the substrate is cut into hundreds of tiny pieces which are later converted into chips. Integrated circuits have to be made perfect. The slightest defective areas of the silicon substrate (and sometimes the entire substrate as a whole) get married.

Reusing discarded silicon wafers possible. Part is used in the manufacture of solar cells. Another part is as test substrates for semiconductor production lines.

Often, however, for reuse, have to use acidic chemicals to clean the substrates of electrical circuits. It harms the environment and spoils expensive silicon.

Now, IBM found a new way to clean silicon wafers from electrical circuits. The substrate is cleaned with water and a pillow covered with an abrasive. This not only saves money, but also leaves less damage to the substrate, allowing re-use it.

Thus increasing the shelf life of silicon, IBM believes it can save up to $ 1.5 million per year, as well as send more silicon production, solar cells and involved in which the material is always in short supply. You can always download the news ticker and be aware of all the world’s news.

Original: Physorg.com


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