Patent ID: 8578774

Claim:
A physical quantity sensor comprising: a sensing portion; a casing including a support portion opposed to an end wall of the sensing portion for supporting the sensing portion, the support portion defining a support surface adjacent to the end wall of the sensing portion; a vibration isolating member disposed between the end wall and the support surface to join the sensing portion to the casing, the vibration isolating member being configured to reduce a relative vibration between the sensing portion and the casing; an electrically conductive portion provided on the casing; a pad provided on the sensing portion; and a bonding wire electrically connecting the electrically conductive portion and the pad and including a bend to be convex in a direction opposite to the support surface, wherein the bonding wire is configured to satisfy a relation of 20×d≦h, in which d is an outer diameter of the bonding wire and h is a height of the bonding wire from the pad to a highest point of the bend.