Patent ID: 9214917
Filing Date: 2015-12-15
Classification: H03H

Abstract:
1. A common mode filter (CMF) for high frequency comprising: a main body including an upper magnetic substance, a lower magnetic substance, and a stack structure disposed between the upper magnetic substance and the lower magnetic substance, and external electrodes formed on side surfaces of the main body, wherein the stack structure is composed of a pair of unit stack structures of a first non-magnetic substance in which coil elements and leads electrically connecting the coil elements to the external electrodes are formed and a second non-magnetic substance on which only leads electrically connected to the external electrodes are formed and electrically connected to the first non-magnetic substance, and wherein terminal portions formed at outer ends of the leads do not overlap with the upper magnetic substance and the lower magnetic substance, either by having a length of the upper and lower magnetic substances shorter than that of the first and the second non-magnetic substances, and positioning both opposite ends of the upper and lower magnetic substances to be offset inwardly with respect to both opposite ends of the first and the second non-magnetic substances, or by forming grooves at both opposite ends of the upper and lower magnetic substances, through which grooves the terminal portions of the stack structure are exposed beyond the upper and lower magnetic substances.