http://download.intel.com/pressroom/kits/chipmaking/Making_o...
http://download.intel.com/newsroom/kits/chipmaking/pdfs/Sand...
An example being the sentence "Sand, especially quartz, has high percentages of silicon in the form of silicon dioxide (SiO2) and is the base ingredient for semiconductor manufacturing." which seems to have been copied almost word for word.
Other parts of the article appear to have been simply rewritten from other - more reputable/original - sources too.
So to sum up, this source shouldn't be upvoted, IMO.
Also as an FYI, I love how Google rank this on page 1 for [How a CPU is made]... (indeed, above the original sources)