3 ms·
The article states: >"Originally, the node name was tied to the transistor gate length dimensions." then further down: >"CPP, a key transistor metric, measur
by bogomipz 7y ago
The article states:
>"Originally, the node name was tied to the transistor gate length dimensions."
then further down:
>"CPP, a key transistor metric, measures the distance between a source and drain contact."
I have mistakenly thought that node designations were based on distance between source and drain. Could someone say why gate length dimensions are the more significant measurement? The distance between source and drain somehow feels more intuitive to me. But maybe because this is easier to visualize?
- ajross 7y ago"Gate length" referred to the width of the sandwiched semiconductor band with different doping, (i.e. the "N" part of a PNP CMOS transistor). Traditionally (which is to say, so long ago that it doesn't really matter) these were the finest features present in the mask set and were a good metric for fab sophistication. That CPP metric is measuring how close together the contact vias for the two halves of the transistor can be. It's a much bigger number, but still probably just as good as a proxy for transistor density.
- blattimwind 7y ago> "Gate length" referred to the width of the sandwiched semiconductor band with different doping, (i.e. the "N" part of a PNP CMOS transistor). Something doesn't feel quite right.