Clock wire memory is a deformation that can occur in clock wires, which are used to distribute clock signals in integrated circuits (ICs). When a clock wire is bent or otherwise deformed, the deformation can create a region of higher resistance in the wire. This can cause the clock signal to be delayed in the deformed region, which can lead to timing errors in the IC.
Clock wire memory is a problem that has become increasingly common as ICs have become more complex and clock frequencies have increased. In modern ICs, clock wires can be very long and thin, which makes them more susceptible to deformation. Additionally, the high clock frequencies used in modern ICs can exacerbate the effects of clock wire memory.