Track height
Beginner
How tall a building block is, counted in the number of wire lanes that fit across it.
Novice
A standard cell’s height expressed as the number of horizontal routing tracks (wire lanes on the lowest metal layer) that fit in it. SKY130’s high-density library is 9 tracks tall; ASAP7’s main library is 7.5.
Expert
Sets how many device widths, internal wires and pin access points fit in a cell. Fewer tracks give smaller, lower-capacitance cells but weaker drive and harder pin access; libraries often come in several heights for density, speed or leakage.
Explained in From devices to a cell library (Transistors).
See also: Routing track and pitch, Standard cell.