Silicon, Circuits, and the Digital Revolution

Conductors, Insulators, and Semiconductors

	material:	resistivity
		(ohm-cm)
Metals	copper:	2 x 10-6
good conductors	aluminum:	3 x 10-6
	iron:	10 x 10-6
Insulators	glass:	107 -- 109
bad conductors	diamond:	108 -- 109
	rubber:	1011 -- 1013
	fused quartz:	1014 -- 1016
Semiconductors	graphite:	0.005
in between	germanium:	0.1 -- 10
	silicon:	10 -- 1000

Range of resistivities, 22 orders of magnitude, is one of the largest for physical attributes of matter

Comments, suggestions, or requests to ghw@udel.edu. "http://www.physics.udel.edu/~watson/scen103/colloq2000/conductors.html" Last updated April 10, 2000. © George Watson, Univ. of Delaware, 2000.