Benzocyclobutene

Structural formula
General
Surname	Benzocyclobutene
other names	BCB Bicyclo [4.2.0] octa-1,3,5-triene
Molecular formula	C 8 H 8
External identifiers / databases
CAS number 694-87-1 EC number 633-274-0 ECHA InfoCard 100.161.355 PubChem 69667 Wikidata Q420972
properties
Molar mass	104.15 g mol −1
density	0.957 g cm −3
boiling point	150 ° C
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 226 P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Benzocyclobutene (BCB) is a polycyclic aromatic hydrocarbon consisting of a combination of a benzene ring and a cyclobutane ring .

use

BCB is widely used in the manufacture of photosensitive polymers (e.g. photoresist ). In microsystem technology , BCB-based polymers are also used as dielectrics ; BCB has a relatively low permittivity ε _r of 2.64 to 2.66. Further applications in this area are the use in wafer bonding , for the production of optical connections or also for intracortical neuronal implants. The thin layers are usually applied to the substrates by spin coating.

Individual evidence

1. ↑ ^{a b} Entry on Benzocyclobutene at ChemBlink , accessed on February 25, 2011.
2. ↑ ^{a b} Datasheet Benzocyclobutenes from Sigma-Aldrich , accessed on May 25, 2011 ( PDF ).
3. ↑ Duixian Liu, Ulrich Pfeiffer, Janusz Grzyb: Advanced millimeter-wave technologies: antennas, packaging and circuits . John Wiley and Sons, 2009, ISBN 978-0-470-99617-1 , pp. 108 .