COIL COMPONENT

• Main Authors: HIRAOKA MITSUNORI, ENDO MAKOTO, ITO KAZUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

PROBLEM TO BE SOLVED: To provide a coil component which can prevent reduction in saturation magnetic flux density, while ensuring reliability in electrical connection.SOLUTION: A coil component 10 comprises: a coil part 12; a coating part 7 covering the coil part 12; a conductor post 19A which is provided in the coating part 7 in a penetrating manner so as to extend from a winding part 13 to a top face 7a of the coating part 7; a cover insulating layer 30 having a through-hole 31a at a position corresponding to the conductor post 19A; and an external terminal 20A stacked on the cover insulating layer 30. The conductor post 19A has: a post part 17A; and a lid part 18A extending along the surface direction of the top face 7a from the end on the top face 7a side of the post part 17A. A region provided with the external terminal 20A and a region provided with the lid part 18A both overlap all of a region provided with the through-hole 31a. An area of the region provided with the external terminal 20A and an area of the region provided with the lid part 18A are each larger than an area of the region provided with the through-hole 31a.SELECTED DRAWING: Figure 4 【課題】電気的な接続の信頼性を保ちつつ、飽和磁束密度の低下を抑制することが可能なコイル部品を提供する。【解決手段】コイル部品１０は、コイル部１２と、コイル部１２を覆う被覆部７と、被覆部７に貫設され、巻線部１３から被覆部７の上面７ａまで延びる導体ポスト１９Ａと、導体ポスト１９Ａに対応する位置に貫通孔３１ａを有するカバー絶縁層３０と、カバー絶縁層３０上に積層された外部端子２０Ａと、を備え、導体ポスト１９Ａは、ポスト部１７Ａと、ポスト部１７Ａの上面７ａ側の端部から上面７ａの面方向に沿って延びる蓋部１８Ａと、を有し、外部端子２０Ａが形成された領域及び蓋部１８Ａが形成された領域のいずれも貫通孔３１ａが形成された領域全てと重畳しており、外部端子２０Ａが形成された領域の面積及び蓋部１８Ａが形成された領域の面積は、貫通孔３１ａが形成された領域の面積より広い。【選択図】図４