| 摘要 |
PROBLEM TO BE SOLVED: To conduct a quick and regeneratable bonding of an electrical component even to the area of the smallest contact part by a method wherein a laser beam, which is provided in an optical fiber system, is irradiated on a bonding place and two contact elements are electrically connected with each other without using solder. SOLUTION: An FDC laser system 200 consists of an Nd:YAG laser or a laser 202 of a diode and is provided with an optical film 204. The system guide a laser beam 220 to a connection point 206 through the fiber 204. The optimum heat coupling in an electrical component is found by a method wherein two contact parts are pushed together by the fiber 204 and the interval between a lead wire 208 for tape automation bonding use and a casting pad 210 is reduced to zero. The beam 220 reflected at the contact 206 is made a beam division 214 through a lens 216, is made to pass through a lens 222 and is subjected to infrared detection 212. Then, the beam is inputted in a PC controller 224, is monitored 226, a feedback temperature loop is formed and a laser parameter is controlled. Thereby, the assembly of the electrical component is facilitated and the yield and reliability of the component are enhanced. |
