Patent ID: 7329439
Filing Date: 2008-02-12
Classification: H01L,H05K

Abstract:
1. A solvent-free, uv-curable organic binder-filler composition comprising a preformed thermoplastic or elastomeric polymer/oligomer with reactive end groups, a monofunctional and/or bifunctional acrylate or methacrylate monomer selected from the group consisting of hydroxyethyl acrylate, hydroxyethyl methacrylate, ethoxylated bis-phenol A diacrylate, hexanediol diacrylate, 2-ethylhexyl acrylate, methyl methacrylate, cyclohexyl acrylate, butyl methacrylate, 2-phenoxy ethyl acrylate, 2-phenoxy ethyl methacrylate, 2,2-bis(4-ethacryloxyphenyl)propane, 2,2-bis(4-methacryloxyphenyl)propane, 2,2-bis[4-(2-acryloxyethoxy)phenyl propane, isobornyl acrylate, isoborny methacrylate, glycidyl acrylate, glycidyl methacrylate, and mixtures thereof, a multifunctional acrylated/methacrylated monomer having more than two functional groups selected from the group consisting of trimethylolpropane triacrylate (TMPTA), trimethylolpropane trimethacrylate (TMPTMA), trimethylolpropane propoxylate (PO/OH) triacrylate (TMPPTA), pentaerythritol triacrylate, pentaerythritol tetracrylate, pentaerythritol propoxylate triacrylate, and mixtures thereof, a photoinitiator, and having dispersed therein an organic filler and an inorganic filler where all the constituents are blended forming a homogeneous dispersion without the addition of an organic solvent.