[SOLVED] me1,me2 & contact layers

[krishanu007]

hiii friends,
i am working on cadence virtuoso,on a ALU project.
Can u please explain or give links to any tutorial about..
•difference of me1,me2
•how contact layers work
•what are n-wel,n-diff etc.???
pls i am in a bit hurry...

Added after 3 minutes:

i am beginner to cadence virtuoso.:?:

 

[erikl]

In the figure below pls. find a cross-section through a 3-metal-layer-process.

The contact between silicon (or poly) - marked "P+" - and the Metal_1 layer through the first insulation layer - marked "PMD" - is called contact, the contact between Metal_1 and Metal_2 through the 2nd insulation layer - marked "ILD 1" - is called via1 (or via12) ... and so on.