To microelectronic engineers, BCB stands for benzocyclobutene, a polymeric material that combines bonding capability with appropriate electronic properties for chip manufacturing. This base material - more accurately known as biscyclo[4.2.0]octa-1,3,5-triene, or 1,2-dihydrobenzocyclobutene - is useful is because of its unusual polymerization chemistry that rapidly forms other, more complex cyclic organic structures.