A squib includes an SCB chip connected to electrode pins so as to ignite
by externally applied electric current, and a capacitor electrically
connected to the electrode pins in parallel with a thin film resistor on
the SCB chip. The capacitor is arranged above the header, and the SCB
chip is directly mounted on the capacitor so that the thin film resistor
on the SCB chip and the capacitor are electrically connected through
electrodes provided on a substrate of the SCB chip, while the size of the
SCB chip is smaller than that of the capacitor. In this way, the
invention provides the squib which effectively eliminates surface
unevenness when the capacitor is located, and enables the connection of
the SCB chip and the capacitor to the electrode pins only by one reflow
process, and further makes it possible to use an even smaller chip than
those used in the prior art.