My 2015's PC as a PET chip inside and therefore I can run all avalaible search engines at once and get instant results
Nah, I just googled, Semiconductor 101 and end up finding the freescale presentation.
There is also a way shoter article on PDK as well, try to google CHIP DESIGN PDK 101
It may help you understand the purpose of having a PDK completed
Or if you're if don't like to search, well go there:
http://chipdesignmag.com/display.php?articleId=35
Hey VOILA !