Abstract: A substrate structure includes a substrate and plural conductive structures. The substrate has a substrate body, plural through holes penetrating the substrate body, and two conductive patterns formed on two opposite surfaces of the substrate body respectively. The substrate body is defined with two openings, a hole wall, and a surface roughness along the hole wall. The conductive structures are respectively oriented at the through holes. Each conductive structure is defined with two larger-diameter caps, and a small-diameter segment linking the two larger-diameter caps. In each conductive structure, the two larger-diameter caps are respectively located at the two openings and electrically connected the two conductive patterns, and the surface roughness of the small-diameter segment is less than the surface roughness of the hole wall of a corresponding one of the through holes.

Abstract: A wire-bonding machine includes a main body, a fixture block, a mounting block, a gas supply tube, a cover-gas supply device, a capillary tool and an electrode. The fixture block is provided with a chamber defined therein and a central bore formed at one side wall of the fixture block communicating the chamber. The mounting block has a fixture member extending upwards for being mounted to the main body and an electrode clamping member extending downwards into the chamber of the fixture block. The cover-gas supply device has a continuous gas passage and an orifice defined therein. The protection gas flows in a steady flow field around the orifice in the continuous gas passage of the cover-gas supply device so as to result in better ball formation during the ball formation and ball-bonding process.

Abstract: A wire-bonding machine includes a main body, a fixture block, a mounting block, a gas supply tube, a cover-gas supply device, a capillary tool and an electrode. The fixture block is provided with a chamber defined therein and a central bore formed at one side wall of the fixture block communicating the chamber. The mounting block has a fixture member extending upwards for being mounted to the main body and an electrode clamping member extending downwards into the chamber of the fixture block. The cover-gas supply device has a continuous gas passage and an orifice defined therein. The protection gas flows in a steady flow field around the orifice in the continuous gas passage of the cover-gas supply device so as to result in better ball formation during the ball formation and ball-bonding process.