Coil device and method for manufacturing the same
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakaomi Toi, Koki Sasaki
Life of this patent
Estimating the term…
Abstract
A coil device includes terminal electrodes each including a bottom-surface electrode provided on a bottom surface of a flange, side-surface electrodes provided on side surfaces of the flange, and an end-surface electrode provided on an end surface of the flange at the lower part of the end surface. The end-surface electrode is arranged on the end surface of the flange so that the upper edge of the end-surface electrode is disposed at a first level that is substantially the same as that of the upper edges of the side-surface electrodes in the vicinity of boundaries between the end surface and each side surface of the flange and is disposed at a second level lower than the first level at an approximate central portion of the end surface of the flange.
Claims5
A coil device comprising:
- a core including a reel and a pair of flanges provided at opposite ends of the reel;
- a pair of terminal electrodes each being disposed on a respective one of the flanges of the core;
- and
- a wire wound around the reel of the core so as to define a coil, each end of the wire being connected to a respective one of the pair of terminal electrodes;
- wherein each of the pair of terminal electrodes includes a bottom-surface electrode provided on a bottom surface of the respective flange, side-surface electrodes provided on side surfaces of the respective flange, and an end-surface electrode provided at the lower portion of an end surface of the respective flange;
- and
- the end-surface electrode is provided on the end surface of the respective flange so that the upper edge of the end-surface electrode is disposed at a first level which is substantially the same as that of the upper edges of the side-surface electrodes in the vicinity of the boundaries between the end surface and each side surface of the respective flange and such that the upper edge of the end-surface electrode is disposed at a second level lower than the first level at a central portion in a width-wise direction of the end surface of the respective flange, such that the end-surface electrode is spaced from the majority of magnetic fluxes passing in an axial direction of the coil.
Dependencies are inferred from the claim text.