Ultra-large-scale integration refers to semiconductor manufacturing technologies that place over a million logic gates or components onto a single integrated circuit. It represents the historic progression beyond very-large-scale integration (VLSI), driven by shrinking photolithography nodes. This density enables the creation of complex microprocessors, massive memory arrays, and dense system-on-chip architectures.
We need to account for severe thermal dissipation issues now that we're working at ULSI densities.
While historically significant as a milestone, the term ULSI is rarely used by working engineers, having been largely folded back into the catch-all term VLSI regardless of transistor count.
Also heard as
- ultra-large-scale integration
- ultra large scale integration
Related terms
VLSI
Very large-scale integration is the process of creating an integrated circuit by combining thousands to millions of transistors onto a single chip.
IC
A complete electronic circuit manufactured on a single piece of semiconductor material.
Chip
A small piece of semiconducting material containing a complex integrated circuit.
Wafer-scale integration
A manufacturing approach where an entire silicon wafer is used as a single massive integrated circuit.