| 摘要 |
PROBLEM TO BE SOLVED: To provide a wiring board having higher reliability of connection with a fixing board or an interconnection board with higher reliability of connection with the wiring board or the fixing board. SOLUTION: This wiring board 10 comprises an alumina ceramic wiring board body 1, having first and second faces 1a, 1b, a terminal pad 2 formed on the second faces 1b side, and a columnar terminals 3 for connection with a printed board (fixing board 20. The terminal 3 is bonded to the terminal pad 2 and composed of a high temperature solder, having a hemispherical forward end part 3a to be connected with the printed board, a base end part 3c to be bonded to the terminal pad 2, and a columnar part 3b elongated axially longer than the diameter thereof and interposed between the forward end part 3a and the base end part 3c. The base end part 3c has a diameter increasing gradually from the columnar part 3b toward the terminal pad 2. Even if deformation takes place due to the difference of thermal expansion between the wiring board 10 the printed board 20, the columnar part 3b of the terminals 3 is bent, and the base end part 3c prevents concentration of stresses. Consequently, the board is tends not to rupture and high connection reliability can be attained. |
