The CYCLOTENE 3000 series Advanced Electronic Resins derived from B-staged bisbenzocyclobutene (BCB) monomers are dry-etch grades of the CYCLOTENE family of products, and were developed for use as spin-on dielectric materials in microelectronic device fabrication. The CYCLOTENE Resins are low dielectric constant and low dielectric loss materials, and feature low moisture absorption, no out-gassing, low temperature cure and excellent planarization.