Title: Composite filter chip
Application Number: 200610144746 Application Date: 2006.10.09
Publication Number: 1949663 Publication Date: 2007.04.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03H9/00;H03H9/02;H03H9/10;H03H9/15;H03H9/25;H03H9/54;H03H9/64
Applicant(s) Name: Matsushita Electric Industrial Co., Ltd. Address:
Inventor(s) Name: Yahata Kazuhiro;Uno Takashi;Tsurumi Naohiro;Sakai
Attorney & Agent: ligui liang
Abstract:
    A feasible filter chip can be achieved by restraining a possessive area of the filter chip in a device which adopting a plurality of the filter chips. A composite filter chip comprises a laminated chip (31), consisting of a first filter chip (11) and a second filter chip (21) mounted on a mounting substrate (41). The first filter chip (11) consists of a filter circuit (12) formed on the major surface of a silicon substrate, and a plurality of pads (13) connected electrically with the filter circuit (12). Similarly, the second filter chip (21) consists of a filter circuit (22), formed on the major surface of the silicon substrate, and a plurality of pads (23) formed on the opposite sides of the filter circuit (22) at an interval. Each pad (23) is connected electrically with the filter circuit (12). The first filter chip (11) and the second filter chip (21) are bonded, while made to face the back side of the silicon substrate to each other.
Time: 5