Patent ID: 7666348

Claim:
A production method for an electrode for a cold cathode fluorescent lamp, comprising: preparing a metal powder composed of one of Mo and W, and a binder composed of a thermoplastic resin and a wax; mixing the metal powder and 40 to 60 volume % of the binder with respect to the metal powder into a mixed powder; heating and kneading the mixed powder into a raw material; supplying a predetermined amount of the raw material in a hole of a die; compacting the raw material into a cup-shaped green compact by pressing the raw material by a punch, the cup-shaped green compact having a cylindrical portion, a bottom formed at one end portion thereof, and an opening formed at another end portion thereof; cooling the cup-shaped green compact so as to maintain the shape of the green compact by the hardened binder; ejecting the cup-shaped green compact from the hole of the die; removing the binder from the ejected cup-shaped green compact by heating; and sintering the cup-shaped green compact by heating the green compact, thereby diffusion-bonding the particles of the green compact, wherein the binder includes 40 to 80 volume % of the wax, and in the compacting, the raw material is heated to a temperature that is a softening point of the thermoplastic resin or higher, and in the ejecting, the green compact is cooled to a temperature that is the softening point of the thermoplastic resin or lower and that is a softening point of the wax or higher.