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1. (WO2018088219) FERRITE SUBSTRATE MODULE

Pub. No.:    WO/2018/088219    International Application No.:    PCT/JP2017/038603
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Fri Oct 27 01:59:59 CEST 2017
IPC: H01L 23/12
H01F 27/00
H01F 27/29
H01L 23/00
H05K 1/16
H05K 3/00
Applicants: MURATA MANUFACTURING CO., LTD.
株式会社村田製作所
Inventors: NANJO Jyunichi
南條 純一
MAKINO Narimichi
牧野 成道
Title: FERRITE SUBSTRATE MODULE
Abstract:
Provided is a small-size ferrite substrate module which has excellent coil characteristics and excellent electrical characteristics including ground characteristics. According to the present invention, a ferrite substrate (20) comprises: magnetic layers (21, 22); and a non-magnetic layer (24) and a non-magnetic layer (25), which are arranged so as to sandwich the magnetic layers (21, 22). A surface of the non-magnetic layer (25), which is on the reverse side of the magnetic layer (22)-side surface, serves as a second main surface (203) of the ferrite substrate (20). The non-magnetic layer (25) is provided with a first recess (211), a second recess (212) and a wiring conductor (421). The first recess (211) opens to the second main surface (203) and a first lateral surface (201), and has an inner wall surface (221) that is not linear when viewed in plan. The wiring conductor (421) is exposed from the inner wall surface (221) of the first recess (211). An outer surface conductor (60) is formed on the inner wall surface (221) of the first recess (211), and is connected to the wiring conductor (421).