| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for connecting terminals between chips, in which noise resistance is improved and a circuit board is miniaturized, and to provide the circuit board fabricated using it, and a fire detector equipped with it. <P>SOLUTION: In a circuit board 2 which consists of a printed circuit board, a photodiode PD, which is equipped with an electrode in a surface in which a photo acceptance surface is provided, and an integrated circuit chip IC1 for an optical element, which performs the signal processing of the output of the photodiode PD, are mounted close to each other. In the circuit board 2, a through hole 2c, which passes through the circuit board 2 in the thickness direction, a circuit board side electrode, to which the electrodes of the photodiode PD and the integrated circuit chip IC1 for the optical element are electrically connected, respectively, and a wiring pattern 2a, which electrically connects both of the circuit board side electrodes to each other, are provided. While the photo acceptance surface is exposed from the through hole 2c, the photodiode PD is arranged on the circuit board 2, and the electrodes of the photodiode PD and the integrated circuit chip IC1 for the optical element are connected to the circuit board side electrode by flip chip bonding, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT |
