Christmas song

Nice song!! Christmas song by Michael Bubble


Enjoy!

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When people designing for a product that is going to be used in the clean room environment, one thing that must be put into consideration is how to let the product itself has a very little of contamination. This is very important because when the product attracts contamination, it will affecting the end product of chip production, i.e.: contaminating the wafer which resulting in defects thus yield lost. First of all, one might want to understand how the clean room being classified. So below (taken from wikipedia ), you may find that the cleanliness of a clean room is segmented into how many contamination accepted in an area. Normally the chip manufacturer will need to define the cleanliness of their fab by judging from the application they will use. The smaller the overlay , the cleaner they want to go.  For example, in 2007 there is a news , Intel aimed to produce a 45nm chips, for this, they came up with a clean room class 1 in about 184,000 square feet, meaning that...
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