US 11,657,955 B2
Surface mount inductor
Ryota Watanabe, Nagaokakyo (JP); Masaki Kitajima, Nagaokakyo (JP); and Takeo Ohaga, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Apr. 2, 2019, as Appl. No. 16/373,543.
Claims priority of application No. JP2018-075477 (JP), filed on Apr. 10, 2018; and application No. JP2018-228012 (JP), filed on Dec. 5, 2018.
Prior Publication US 2019/0311841 A1, Oct. 10, 2019
Int. Cl. H01F 27/29 (2006.01); H01F 27/28 (2006.01); H01F 17/04 (2006.01); H01F 41/06 (2016.01)
CPC H01F 27/292 (2013.01) [H01F 17/04 (2013.01); H01F 27/2828 (2013.01); H01F 27/2852 (2013.01); H01F 41/06 (2013.01); H01F 2017/048 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A surface mount inductor comprising:
a coil including a winding portion formed by winding a conducting wire, such that both ends are located on the outer circumference, and a pair of extension portions that extend from the outer circumference of the winding portion;
a molded body which contains a metal magnetic powder and in which the coil is embedded; and
a pair of outer terminals disposed on the molded body and connected to the extension portions,
wherein
the molded body has a pair of principal surfaces opposite to each other, a pair of end surfaces that are adjacent to the pair of principal surfaces and that are opposite to each other, and side surfaces that are adjacent to the pair of principal surfaces and the pair of end surfaces and that are opposite to each other, one of the principal surfaces serving as a mounting surface that is a lowest surface of the molded body that includes a recessed portion so as to have an elevated region located at a relatively high position and a pair of lowered regions located at a relatively low position on both sides of the recessed portion, the pair of lowered regions connecting the side surfaces to each other,
the coil is embedded in the molded body such that the winding axis of the winding portion becomes parallel to the recessed portion of the mounting surface of the molded body,
the pair of extension portions extend from the outer circumference of the winding portion toward the mounting surface and are arranged so as to be exposed at the pair of lowered regions of the mounting surface and connected to the pair of outer terminals in the pair of lowered regions,
the mounting surface includes a pair of inclined regions connecting the elevated region to the pair of lowered regions, and the extension portions extend to be exposed at the pair of inclined regions connecting the elevated region to the pair of lowered regions and at the pair of lowered regions, and
the pair of inclined regions connecting the elevated region to the pair of lowered regions are inclined to have slopes measured from the elevated region to the pair of lowered regions.