发明授权
US07280008B2 Printed-circuit board, electronic part having shield structure, and radio communication apparatus
失效
印刷电路板,具有屏蔽结构的电子部件和无线通信装置
- 专利标题: Printed-circuit board, electronic part having shield structure, and radio communication apparatus
- 专利标题(中): 印刷电路板,具有屏蔽结构的电子部件和无线通信装置
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申请号: US10501934申请日: 2003-01-23
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公开(公告)号: US07280008B2公开(公告)日: 2007-10-09
- 发明人: Kunio Yamaguchi , Ryouhei Kimura , Atsushi Tsuboi , Kenyu Morozumi
- 申请人: Kunio Yamaguchi , Ryouhei Kimura , Atsushi Tsuboi , Kenyu Morozumi
- 申请人地址: JP Tokyo JP Osaka
- 专利权人: Mitsubishi Materials Corporation,Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Mitsubishi Materials Corporation,Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JP Tokyo JP Osaka
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权: JP2002-016149 20020124; JP2002-016150 20020124; JP2002-016151 20020124; JP2002-182754 20020624
- 国际申请: PCT/JP03/00596 WO 20030123
- 国际公布: WO03/063561 WO 20030731
- 主分类号: H03H9/64
- IPC分类号: H03H9/64 ; H03H9/05
摘要:
In a fitting region for a SAW filter which includes langasite as its piezoelectric element, there are included an input side terminal electrode and an output side terminal electrode which are connected to an input terminal and to an output terminal of the SAW filter. To each of the terminal electrodes, at a position which is separated by just a predetermined distance from the fitting region of the SAW filter, there is connected a micro strip line which extends in mutually opposite directions along a direction which is parallel to the transmission direction of a frequency signal within the SAW filter. A slit is provided in the fitting region of the SAW filter and extends in a direction which intersects the transmission direction of the frequency signal within the SAW filter. A plurality of through holes are provided in the printed substrate and electrically connect together its surface and its rear surface which is grounded. Furthermore, there is provided a protective member which has a conductive surface and which is in contact with the surface of said filter, and said conductive surface of said protective member which is in contact with the surface of said filter is set so as to be of the same size as the surface of said filter, or so as to be smaller than it.