Patent ID: 9245667
Filing Date: 2016-01-26
CPC Classification: C08L,H01B,H05K

Claim Text:
1. A circuit board comprising: a substrate; and a dielectric layer provided on the substrate, wherein the dielectric layer comprises a dielectric material comprising polyphenylene ether (PPE) resin, bismaleimide resins and polymer additives, the dielectric material comprises: (i) 40-80 parts by weight of polyphenylene ether resin having a Mw of 1000-7000, a Mn of 1000-4000 and Mw/Mn=1.0-1.8; (ii) 5-30 parts by weight of bismaleimide resins; and (iii) 5-30 parts by weight of polymer additives, wherein the dielectric material has Dk of 3.75-4.0 and Df of 0.0025-0.0045, the dielectric material further comprises catalysts including at least one peroxide having 116° C.-128° C. for a half life of 10 hours with 2-8 phr based on the total weight of PPE, BMI, polymer additives and crosslinking agents and the catalysts include at least one peroxide selected from groups consisting of dicumyl peroxide, α,α′-bis(tert-butylperoxy) diisopropyl benzene and 2,5-di(tert-butylperoxy)-2,5-dimethyl-3-hexyne.