COMMON MODE CHOKE COIL

摘要

A common mode choke coil capable of improving immunity characteristics by employing a coil structure where malfunction of a transmission IC and a reception IC can be prevented during immunity test. The common mode choke coil includes a core (2), external electrodes (3-1 through 3-4), a pair of windings (4-1, 4-2), and a top plate (5). The core (2) consists of a core portion (20) and a pair of flanges (21, 22) located at the opposite ends thereof, with the upper surface (20a) of the wound core portion (20) and the upper surfaces (21c, 22c) of the flanges (21, 22) being covered with a metal film (6). The external electrodes (3-1 through 3-4) are formed beneath the flanges (21, 22). The pair of windings (4-1, 4-2) are wound around the wound core portion (20) of the core (2), their end portions (4-1a, 4-2a) are bonded to the external electrodes (3-1, 3-2), and the end portions (4-1b, 4-2b) are bonded to the external electrodes (3-3, 3-4). The top plate (5) is bonded to the upper surfaces (21c, 22c) of the flanges (21, 22) by an adhesive (7).