What does Process in nm mean?(45nm,28 nm)

Posted by deva_p on April 12, 2012 05:03 am 14

What does manufacturing process in nm mean in processors?

The snapdragon S1 and S2 are 45nm

S4 is 28 nm

Sandy bridge 32nm

Ivy bridge 22nm

So is a smaller process better?

I've read somewhere that it lowers power consumption, is smaller, saves space.

Are there any other advantages?

And why does it have these advantages?

can anybody explain?