公开(公告)号：US20190304665A1

公开(公告)日：2019-10-03

申请号：US16264496

申请日：2019-01-31

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuki KITASHIMA ,  Masaki KITAJIMA ,  Takeo OHAGA ,  Takeshi SHIMADA ,  Yoshiaki HIRAMA ,  Daigo MIZUMURA ,  Ryota WATANABE ,  Masato KOIKE ,  Yuusuke MORITA

IPC: H01F27/29 ,  H01F27/28 ,  H01F41/04 ,  H01F27/255 ,  H01F41/02

Abstract: A surface mount inductor includes a coil including a wound portion and a feeder end portion drawn out from the wound portion, a compact that contains a magnetic powder and that encapsulates the coil, and an external terminal disposed on the compact and connected to the coil. The compact has surfaces including two pressed surfaces, opposing each other in a direction of an axis of the wound portion and formed by being pressed in the direction of the axis, and a non-pressed surface, adjacent to the two surfaces and not pressed. The coil is disposed so that the axis of the wound portion is parallel to a mount surface of the compact. The mount surface is included in the non-pressed surface, the feeder end portion is exposed from the mount surface, and the external terminal is formed on only the non-pressed surface and connected to the feeder end portion.

公开(公告)号：US20190304669A1

公开(公告)日：2019-10-03

申请号：US16370701

申请日：2019-03-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yoshiaki HIRAMA ,  Daigo MIZUMURA ,  Ryota WATANABE

IPC: H01F27/32 ,  H01F27/28 ,  H01F27/29 ,  H01F41/061 ,  H01F41/12

Abstract: A surface-mounted inductor including a coil having a wound part formed by winding a conductive wire and extended parts extended from an outer circumference of the wound part, a molded body containing the coil, constituted by a composite material containing a magnetic powder, and outer terminals connected to end portions of the extended parts disposed on a mounting surface. The wound part is contained within the molded body so that a winding axis is parallel to the mounting surface. The extended parts are extended toward the mounting surface side, each end portion of the extended parts are exposed from the surface thereof of the molded body. In the molded body, a density of a magnetic powder between the end portions of the extended parts on the mounting-side surface is lower than a density in the surface on the opposite side from the mounting surface.

公开(公告)号：US20210020354A1

公开(公告)日：2021-01-21

申请号：US16929323

申请日：2020-07-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Ryota WATANABE

IPC: H01F27/28 ,  H01F27/24 ,  H01F27/29 ,  H01F27/32 ,  H01F41/063 ,  H01F41/02

Abstract: An inductor includes an element assembly and a pair of outer electrodes. The element assembly includes a coil and a magnetic body. The coil includes a winding portion in which conductive wires each having a coating layer are spirally wound in two stages connected at their innermost segments and a pair of extension portions extended from their outermost segments in the stages of the winding portion. The magnetic body has a mounting surface, is made of magnetic powder and resin, and seals the coil such that the mounting surface is approximately parallel with a winding axis of the winding portion. The outer electrodes are disposed on the mounting surface. Each of the extension portions includes a first region and a second region. The element assembly has a recess portion allowing the first regions and an outer surface of the winding portion positioned between the first regions to be exposed.

公开(公告)号：US20250022648A1

公开(公告)日：2025-01-16

申请号：US18771316

申请日：2024-07-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kozo SATO ,  Ryota WATANABE

IPC: H01F27/28 ,  H01F27/255 ,  H01F27/29 ,  H01F27/32

Abstract: A multilayer inductor includes an element body that constitutes a magnetic body by stacking magnetic layers containing iron powder and that has a coil obtained by winding a coil conductor inside the magnetic body, and an outer electrode that is electrically connected to the coil conductor. A resin is provided in voids inside the magnetic body, and the resin is provided in at least a part of pores in the coil conductor at least in a vicinity of a magnetic layer.

公开(公告)号：US20190311841A1

公开(公告)日：2019-10-10

申请号：US16373543

申请日：2019-04-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Ryota WATANABE ,  Masaki KITAJIMA ,  Takeo OHAGA

IPC: H01F27/29 ,  H01F41/06 ,  H01F27/28

Abstract: A surface mount inductor includes a coil including a conducting wire winding portion with both ends on the outer circumference and a pair of extension portions that extend from the outer circumference, a molded body containing a metal magnetic powder and the coil embedded, and a pair of outer terminals disposed on the molded body and connected to the extension portions. The molded body has principal surfaces, end surfaces, and side surfaces. One principal surface serves as a mounting surface including a recessed portion with an elevated region and a lowered region. The coil is embedded in the molded body with the winding axis of the winding portion parallel to the recessed portion, and the pair of extension portions extend from the outer circumference toward the mounting surface to be exposed at the lowered region and connected to the pair of outer terminals in the lowered region.