公开(公告)号：US20240203625A1

公开(公告)日：2024-06-20

申请号：US18555158

申请日：2022-03-18

Applicant: TDK Corporation

Inventor： Michitaka OKAZAKI ,  Ikuya KOKUBO ,  Takuya TAKEUCHI ,  Masaki ENDO ,  Masaki YONEYAMA

IPC: H01F5/06 ,  H01F41/12

CPC classification number: H01F5/06 ,  H01F41/122

Abstract: To suppress an increase in DC resistance due to surface roughening in a coil component including a spiral pattern. A coil component manufacturing method includes: a first step of forming a conductor layer including a spiral pattern spirally wound in a plurality of turns; a second step of selectively roughening an upper surface and an upper region of a peripheral-direction side surface of the spiral pattern; and a third step of forming an insulating resin layer so as to embed therein the conductor layer, and the first to third steps are repeatedly performed. Since the upper surface and the upper region of the side surface of the spiral pattern are selectively roughened, it is possible to suppress an increase in DC resistance due to excessive roughening at the lower region of the side surface.

公开(公告)号：US20180358169A1

公开(公告)日：2018-12-13

申请号：US16000669

申请日：2018-06-05

Applicant: TDK CORPORATION

Inventor： Tomonaga NISHIKAWA ,  Tomokazu ITO ,  Manabu YAMATANI ,  Masanori SUZUKI ,  Ikuya KOKUBO ,  Takuya TAKEUCHI

IPC: H01F27/29 ,  H01F41/12 ,  H01F5/04 ,  H01F5/06

CPC classification number: H01F27/292 ,  H01F5/04 ,  H01F5/06 ,  H01F41/12

Abstract: Disclosed herein is a coil component that includes: a coil part in which a plurality of conductor layers and a plurality of interlayer insulting layers are alternately laminated, the coil part having a mounting surface substantially parallel to the lamination direction and an upper surface substantially parallel to the lamination direction and positioned on an opposite side to the mounting surface; and a direction mark comprising a conductive material that covers a part of the conductor layers exposed on the upper surface.