Title:
BAND-PASS FILTER MODULE AND MODULE SUBSTRATE
Document Type and Number:
WIPO Patent Application WO/2012/011526
Kind Code:
A1
Abstract:
Provided is a band-pass filter module provided with a mounting substrate with a surface on which a BPF chip can be mounted, and a BPF chip mounted on said surface, wherein the BPF chip contains at least three-stage resonators, and the intermediate-stage resonator which is connected between the first-stage resonator closest to an input terminal and the last-stage resonator closest to an output terminal is arranged in a chip center portion. In a region of the mounting substrate overlapping the chip center portion when seen in a plan view, a ground non-arrangement portion where no ground electrode is arranged is formed over at least a range from the surface of the mounting substrate to a depth position where the topmost inner wiring layer among one or more inner wiring layers is arranged. This prevents connection between the intermediate-stage resonator and the ground electrodes included in the mounting substrate, and prevents a Q value of the intermediate-stage resonator from being lowered, thereby preventing insert loss from being increased.
Inventors:
TOMAKI, Shigemitsu (TDK-EPC Corporation 1-13-1, Nihonbashi Chuo-ku Tokyo, 27, 〒1030027, JP)
戸蒔 重光 (〒27 東京都中央区日本橋一丁目１３番１号 ＴＤＫ－ＥＰＣ株式会社 内 Tokyo, 〒1030027, JP)
TSUYA, Yoshikazu (TDK-EPC Corporation 1-13-1, Nihonbashi Chuo-ku Tokyo, 27, 〒1030027, JP)
津谷 好和 (〒27 東京都中央区日本橋一丁目１３番１号 ＴＤＫ－ＥＰＣ株式会社 内 Tokyo, 〒1030027, JP)
戸蒔 重光 (〒27 東京都中央区日本橋一丁目１３番１号 ＴＤＫ－ＥＰＣ株式会社 内 Tokyo, 〒1030027, JP)
TSUYA, Yoshikazu (TDK-EPC Corporation 1-13-1, Nihonbashi Chuo-ku Tokyo, 27, 〒1030027, JP)
津谷 好和 (〒27 東京都中央区日本橋一丁目１３番１号 ＴＤＫ－ＥＰＣ株式会社 内 Tokyo, 〒1030027, JP)
Application Number:
JP2011/066559
Publication Date:
January 26, 2012
Filing Date:
July 21, 2011
Export Citation:
Assignee:
TDK Corporation (1-13-1, Nihonbashi Chuo-ku Tokyo, 72, 〒1038272, JP)
ＴＤＫ株式会社 (〒72 東京都中央区日本橋一丁目１３番１号 Tokyo, 〒1038272, JP)
TOMAKI, Shigemitsu (TDK-EPC Corporation 1-13-1, Nihonbashi Chuo-ku Tokyo, 27, 〒1030027, JP)
戸蒔 重光 (〒27 東京都中央区日本橋一丁目１３番１号 ＴＤＫ－ＥＰＣ株式会社 内 Tokyo, 〒1030027, JP)
TSUYA, Yoshikazu (TDK-EPC Corporation 1-13-1, Nihonbashi Chuo-ku Tokyo, 27, 〒1030027, JP)
ＴＤＫ株式会社 (〒72 東京都中央区日本橋一丁目１３番１号 Tokyo, 〒1038272, JP)
TOMAKI, Shigemitsu (TDK-EPC Corporation 1-13-1, Nihonbashi Chuo-ku Tokyo, 27, 〒1030027, JP)
戸蒔 重光 (〒27 東京都中央区日本橋一丁目１３番１号 ＴＤＫ－ＥＰＣ株式会社 内 Tokyo, 〒1030027, JP)
TSUYA, Yoshikazu (TDK-EPC Corporation 1-13-1, Nihonbashi Chuo-ku Tokyo, 27, 〒1030027, JP)
International Classes:
H01P1/203; H03H7/01; H05K1/18
Attorney, Agent or Firm:
MASHIKO, Naomichi (2-12 Towahanzomonkopu 406, Hayabusa-cho Chiyoda-ku, Tokyo 92, 〒1020092, JP)
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Claims: