Patent ID: 8042727
Filing Date: 2011-10-25
Classification: B23K,F27B,H01L,H05K

Abstract:
1. A solder bump forming apparatus for forming a solder bump through heating and reflowing a solder composition on a substrate where a plurality of pad electrodes are provided, wherein the solder composition is made of a mixture of solder particles and a liquid material that contains a flux component, which becomes liquid at a normal temperature or when heated, the solder bump forming apparatus comprising: a heating device provided for heating the solder composite from a first side of the substrate, wherein the heating device blows hot air, and wherein the blowing hot air of the heating device does not directly come in contact with the solder composition on the substrate within a space through which the substrate is conveyed; a thermostat device for controlling a temperature of the solder composition is provided at a position above a mount plate, which is located over a second side of the substrate, wherein the thermostat device includes a system in which a cool air or hot air of the thermostat device does not directly come in contact with the solder composition on the substrate within the space; the thermostat device being enclosed within a thermostat enclosure and the heating device being enclosed within a heating device enclosure, the thermostat enclosure and heating device enclosure preventing all blowing air of the solder bump forming apparatus from being blown within the space through which the substrate is conveyed, the thermostat enclosure including a thermostat circulation duct that defines at least part of a thermostat circulation path within the thermostat enclosure, and the heating device enclosure including a heating device circulation duct that defines at least part of a heating circulation path within the heating device enclosure; the thermostat device having a thermostat blower, a main thermostat, a cool/heat storage member, a heat absorbing plate, and a sub-thermostat source; the heating device having a heat blower, a main heating source, a heat storage member, an opening that is covered, and a sub-heating source; and the thermostat blower circulates a thermostat medium along the thermostat circulation path, wherein the thermostat circulation path provides a thermostat flow path from the main thermostat source, through the cool/heat storage member, along the heat absorbing plate, through the thermostat circulation duct having the sub-thermostat source therein, to the thermostat blower, and returning to the main thermostat source, and the heat blower circulates hot air along the heating circulation path, wherein the heating circulation path provides a heating flow path from the main heating source, though the heat storage member, along the covered opening, through the heating device circulation duct having the sub-heating source therein, to the heat blower, and returning to the main heating source.