Solder is a material used to form a joint between electronic parts and substrates during the manufacture of electronic devices such as mobile phones and computers. One variety called solder paste is a creamy mixture of fine metal powder and other materials which include rosin. We have applied the decomposing effect of rosin on metal oxides to develop unique solder pastes by mixing metal powder with rosin derivatives. We believe it is our duty to protect the environment, and as such were one of the first to develop lead-free solder pastes as a means to prevent the devastating impact that lead has on the environment when it leaches from old or discarded electronics due to acid rain. Ever since our lead-free solder pastes were used to produce the world’s very first lead-free MD player in 1998, it has become widely adopted.

Brazing technology used to join aluminum is another application of Harima’s extensive know-how. Aluminum brazing materials used in the manufacture of all kinds of aluminum products contribute to enhanced quality and reduced costs. Aluminum is commonly employed as a weight-saving measure in heat exchangers, which are an essential part of engine cooling and air conditioning in automobiles, making it necessary to braze aluminum parts of varying shapes together. Conventional manufacturing methods involved spraying the materials needed for brazing on to the entire surface of heat exchanger member and then heating. However, the aluminum brazing material we engineered is an extension of our precoating technology and only requires that a minimal amount of brazing material be supplied just to the immediate brazing area, realizing drastic cost reductions and higher quality.