| 摘要 |
PURPOSE:To prevent the clogging of the needle of a dispenser using a filler- containing resin solution as a resin solution, by forming the needle of said dispenser into a tapering shape. CONSTITUTION:A resin solution is prepared by adding a solvent to a mixture consisting of a thermosetting resin such as a phenol resin or an epoxy resin, an inorg. filler such as calcium carbonate, alumina or talc and additives if necessary and has viscosity of 5-300 poise/25 deg.C. In order to automatically perform drip-coating work using said resin solution, a needle is formed into a tapering needle 5 tapered from the root thereof to the leading end thereof. By this method, the clogging of the needle by the resin solution is prevented to make it possible to easily prepare a highly reliable printed circuit board such as hybrid IC.
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