Abstract: Disclosed is an optical recording medium comprising a transparent substrate having a tracking line formed therein, and a recording layer formed on that surface of the substrate in which is formed the tracking line. The recording layer consists of a low oxide of nickel. Also disclosed is an optical recording medium comprising a transparent substrate consisting of a thermoplastic resin, a thermosetting resin layer formed on each surface of the substrate, a patterned photoresist layer, said patterned photoresist layer being formed on one of the thermosetting resin layer, and a recording layer formed to cover the exposed portion of the thermosetting resin layer and the patterned photoresist layer.

Abstract: A support is formed and comprises a base, a resin layer which is formed on the base and on recesses which are formed on a surface of the base, and a conductive layer which is formed on a portion of a surface of the resin layer, other than where the recesses are formed. The surface of the recesses is electrically charged by way of a corona discharge to create static electricity in the recesses. Metal balls to be formed into bump electrodes are held in the recesses by way of the static electricity. Then, each of the metal balls is bonded to a corresponding electrode terminal of an electronic component by hot press unit while the electronic component is opposed to the support.