A photopolymerization initiator comprising an \u03b1-diketone compound such as camphorquinone, an aliphatic amine compound such as triethanolamine or N-methyldiethanolamine, an aromatic amine compound such as ethyl p-dimethylaminobenzoate or N,N-dimethyl p-toluidine, and a triazine compound substituted with a trihalomethyl group, such as 2,4,6-tris-s-triazine or 2-phenyl-4,6-bis-s-triazine. The invention also provides pharmaceutically acceptable compositions comprising those compounds and methods of using the compounds and compositions in the treatment of various disease, conditions, and disorders. Alternately, joining material paste is forced into the screen and then a substrate is placed onto the screen with an area array of bump contacts of the substrate in contact with the solder paste, and then the paste is heated and cooled to transfer the material onto the bumps.