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Patent Searching and Data


Title:
THIN FILM INDUCTOR AND POWER CONVERSION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2017/181673
Kind Code:
A1
Abstract:
A thin film inductor, comprising a thin film magnetic core (110). The thin film magnetic core comprises multiple magnetic columns, a first end (120), and a second end (130). The multiple magnetic columns are rod-shaped and are separated from each other. One end of each magnetic column is in contact with the first end (120) and the other end thereof is in contact with the second end (130). The multiple magnetic columns comprise two or more winding magnetic columns (140) and a non-winding magnetic column (150), the non-winding magnetic column (150) being located at one side of the two or more winding magnetic columns (140); or the multiple magnetic columns comprise two or more winding magnetic columns (140) and two non-winding magnetic columns (150), the two or more winding magnetic columns (140) being located between the two non-winding magnetic columns (150). The thin film magnetic core (110) comprises at least one layer of magnetic thin film (101). At least one first-type gap (170) is provided in a region, in each layer of magnetic thin film (101), located at the first end (120) and the second end (130) and located between two adjacent winding magnetic columns (140). The length direction of the first-type gap (170) is parallel to the direction of hard magnetization of the magnetic thin film (101). The magnetic thin films (101) are stacked and overlapped. The sum of widths of all the first-type gaps (170) on each layer of magnetic thin film (101) is equal.

Inventors:
YANG HEQIAN (CN)
ZHU YONGFA (CN)
LUO XIAOLONG (CN)
Application Number:
CN2016/106889
Publication Date:
October 26, 2017
Filing Date:
November 23, 2016
Export Citation:
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Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H01F17/00; H01F17/04; H01F27/30; H02M3/155
Foreign References:
CN105761880A2016-07-13
CN104637659A2015-05-20
CN102197446A2011-09-21
US6583701B22003-06-24
Other References:
See also references of EP 3346476A4
Attorney, Agent or Firm:
LONGSUN LEAD IP LTD. (CN)
北京龙双利达知识产权代理有限公司 (CN)
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