What it is and the problem it solves
Moore’s law is a retrospective trendline describing how transistor count in dense ICs grew over time. It solves no technical problem directly—it describes one: the pace of miniaturisation in silicon fabrication.
How it works
Moore’s law is an empirical observation, not a physical law or engineering rule. It tracks the historical rate of increase in transistor count per integrated circuit, derived from Moore’s 1965 analysis of industry data and revised in 1975.
What works
The observation held for ~50 years across multiple process generations. From 1965 to the mid-2010s, transistor count in leading-edge ICs did double roughly every two years, enabling sustained gains in computing capability.
What does not
It does not explain why transistors double, nor does it guarantee continuation. It makes no claim about cost, power, heat, yield, or performance—only component density.
What it changes
It shifted industry planning from discrete product roadmaps to exponential scaling expectations, anchoring R&D budgets, fab investments, and corporate strategy around two-year density cycles.
Is it worth your time
Yes—if you work in semiconductor design, manufacturing planning, or tech forecasting—because it remains a useful heuristic for capacity scaling, even as its predictive power erodes near physical limits.