[michaelf]

Crystals are actually a major portion of the study of solid-state physics:

http://en.wikipedia.org/wiki/Solid-state_physics#Crystal_str...

[Zenst]

Thats physics and not electronics but that is the whole problem with the phrase solid-state and in that it is not a good way to refer to things without being qualified in a way that negates its use or even mentioning it in the first place.