Patent ID: 8125305

Claim:
An inductance element, comprising: a doughnut-shaped magnetic core; a bottomed container having a cylindrical outer wall portion, a cylindrical inner wall portion arranged within the cylindrical outer wall portion, a bottom portion disposed at an end of each of the cylindrical outer wall portion and the cylindrical inner wall portion to close a space between them, an open section provided at the other end of each of the cylindrical outer wall portion and the cylindrical inner wall portion and a hollow portion disposed within the cylindrical inner wall portion, wherein the doughnut-shaped magnetic core is housed between the cylindrical outer wall portion and the cylindrical inner wall portion; and an adhesive portion, disposed on the side of the open section of the bottomed container, integrally fixing the doughnut-shaped magnetic core and the bottomed container, wherein the adhesive portion has an extended portion extended into the cylindrical inner wall portion, and a ratio (B/A) of a length (B) of the extended portion to a height (A) of the cylindrical inner wall portion is in a range of 0.1 to 0.5.