Patent ID: 8053953

Claim:
A surface-mount type electronic component comprising: a member constituting at least part of a container and made of ceramic; and an external terminal provided on an outer surface of the member and used in surface-mounting the electronic component on a wiring board by solder; wherein when a thermal expansion coefficient of the ceramic constituting the member is α 1 , a combined expansion coefficient α k of the member and the external terminal satisfies a relation of 1.039≦α k /α 1 ≦1.216; and wherein the external terminal comprises at least a nickel layer functioning as an electrode body, and when a Young's modulus and thermal expansion coefficient of the ceramic constituting the member are E 1 and α 1 , a Young's modulus and thermal expansion coefficient of nickel are E 2 and α 2 , a cross-sectional area of the member in a plane perpendicular to a bonding plane between the member and the external terminal is A 1 , and a cross-sectional area of the nickel layer of the external terminal in the plane perpendicular to the bonding plane is A 2 , the combined expansion coefficient α k is represented by the following formula (1): α k =( E 1 ·α 1 ·A 1 +E 2 ·α 2 ·A 2 )/( E 1 ·A 1 +E 2 ·A 2 ) (1); and the thickness of the nickel layer excesses 0.02 mm and is 0.1 mm or less.