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11. 发明授权

US11240908B2 Thin film capacitor and circuit board incorporating the same 有权
公开(公告)号：US11240908B2
公开(公告)日：2022-02-01
申请号：US16665503
申请日：2019-10-28
申请人： TDK Corporation
发明人： Kazuhiro Yoshikawa , Yuuki Aburakawa , Tatsuo Namikawa , Kenichi Yoshida , Hitoshi Saita
IPC分类号： H05K1/00 , H05K1/02 , H05K1/11 , H05K1/16
摘要： Disclosed herein is a thin film capacitor that includes a capacitive insulating film, a first metal film formed on one surface of the capacitive insulating film, and a second metal film formed on other surface of the capacitive insulating film and made of a metal material different from that of the first metal film. The thin film capacitor has an opening penetrating the capacitive insulating film, first metal film, and second metal film. The second metal film is thicker than the first metal film. A first size of a part of the opening that penetrates the first metal film is larger than a second size of a part of the opening that penetrates the second metal film.

12. 发明申请

US20210265116A1 THIN FILM CAPACITOR, CIRCUIT BOARD INCORPORATING THE SAME, AND THIN FILM CAPACITOR MANUFACTURING METHOD 有权
公开(公告)号：US20210265116A1
公开(公告)日：2021-08-26
申请号：US17165229
申请日：2021-02-02
申请人： TDK CORPORATION
发明人： Yuuki ABURAKAWA , Tatsuo Namikawa , Akiyasu Iioka , Atsuo Matsutani , Hitoshi Saita , Kazuhiro Yoshikawa
IPC分类号： H01G4/33 , H01G4/30 , H01G4/012 , H05K1/16 , H01L23/64 , H01L23/498 , H01G4/008
摘要： Disclosed herein a thin film capacitor that includes a lower electrode layer, an upper electrode layer, and a dielectric layer disposed between the lower electrode layer and the upper electrode layer. The dielectric layer has a through hole. The upper electrode layer has a connection part connected to the lower electrode layer through the through hole and an electrode part insulated from the connection part by a slit. A surface of the lower electrode layer that contacts the connection part through the through hole includes an annular area positioned along an inner wall surface of the through hole and a center area surrounded by the annular area. The annular area is lower in surface roughness than the center area.

13. 发明授权

US09831039B2 Thin film capacitor 有权
公开(公告)号：US09831039B2
公开(公告)日：2017-11-28
申请号：US14953807
申请日：2015-11-30
申请人： TDK CORPORATION
发明人： Tatsuo Namikawa , Junji Aotani , Katsuyuki Kurachi , Yuuki Aburakawa , Shigeaki Tanaka
IPC分类号： H01G4/33 , H01G4/224 , H01G4/008 , H01G4/30 , H01G4/228
CPC分类号： H01G4/33 , H01G4/008 , H01G4/224 , H01G4/228 , H01G4/30 , H01G4/306
摘要： A thin film capacitor comprises: a laminated body that has a base electrode, a dielectric layer and an upper electrode layer; a protective layer covering the base electrode, the dielectric layer and the upper electrode layer, and includes a first through-hole that reaches the base electrode, and a second through-hole that reaches the upper electrode layer; a first extraction electrode in the first through-hole and electrically connected with the base electrode; a second extraction electrode in the second through-hole and electrically connected with the upper electrode layer; a first terminal electrode on the protective layer, and connected with the base electrode through the first extraction electrode; and a second terminal electrode on the protective layer, and connected with the upper electrode layer through the second extraction electrode. Young's modulus of the protective layer is equal to or higher than 0.1 GPa and equal to or lower than 2.0 GPa.

14. 发明授权

US09030800B2 Thin film capacitor 有权
标题翻译：薄膜电容器
公开(公告)号：US09030800B2
公开(公告)日：2015-05-12
申请号：US13796822
申请日：2013-03-12
申请人： TDK Corporation
发明人： Tatsuo Namikawa , Yoshihiko Yano , Yasunobu Oikawa
IPC分类号： H01G4/30 , H01G4/228 , H01G4/20 , H01G4/06 , H01G4/33 , H01G4/38 , H01G4/232
CPC分类号： H01G4/306 , H01G4/228 , H01G4/232 , H01G4/33 , H01G4/38
摘要： A thin film capacitor includes an under electrode, a plurality of dielectric body layers and a plurality of internal electrode layers that are alternately laminated on the under electrode, the internal electrode layers respectively including protrusion parts that each protrude from the dielectric body layers viewed in the lamination direction, and connection electrodes to which at least a portion of each of the protrusion parts contacts. Assuming that protrusion amounts of the protrusion parts of the internal electrode layers that are connected to the same connection electrode are regarded as L, a protrusion amount Ln of a protrusion part of nth (n≧2) internal electrode layer from the under electrode side is smaller than another protrusion amount Ln-1 of another protrusion part of (n−1)th internal electrode layer.
摘要翻译：薄膜电容器包括底电极，多个电介质体层和交替层叠在下电极上的多个内电极层，内电极层分别包括从电介质体层中观察到的每个突出部分的突出部分层叠方向和每个突起部的至少一部分接触的连接电极。假设连接到同一连接电极的内部电极层的突出部分的突出量被认为是L，则从下部电极侧的第n（n≥2）个内部电极层的突出部分的突出量Ln是小于第（n-1）个内部电极层的另一突起部的另一突出量Ln-1。

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