THREE-DIMENSIONAL CIRCUIT BOARD AND FINGERPRINT SENSOR DEVICE
A fingerprint sensor device is mounted on a printed wiring board by bonding a conductive pattern formed on a leg portion of a three-dimensional circuit board and a conductive pattern on the printed wiring board accommodated in a housing of an electronic device with a solder. The detecting surface of a fingerprint sensor element is exposed on the surface of the housing through a window hole provided at the housing. As compared to the conventional art that utilizes connectors, the detecting surface of the fingerprint sensor element is accurately positioned relative to the window hole provided at the housing of the electronic device.
1 . A three-dimensional circuit board on which a fingerprint sensor element that converts a fingerprint image obtained from its flat detecting surface into an electric signal for outputting is mounted, the detecting surface being exposed to the outside of a housing of an electronic device through a window hole provided at the housing, and which is mounted on a printed wiring board accommodated in the housing,
the three-dimensional circuit board comprising:
a synthetic resin molded component that includes a mounting portion in which a concave portion for accommodating the fingerprint sensor element, and at least one leg portion whose end portion is connected to the mounting portion and whose other end portion is mounted on the printed wiring board, the mounting portion and the leg portion being formed integrally; and
a conductive body that is provided on the synthetic resin molded component, and electrically connects an output terminal of the fingerprint sensor element mounted on the mounting portion and a conductive pattern formed on the printed wiring board.
2 . The three-dimensional circuit board according to claim 1 further comprising a metal film for electromagnetic shield that is extended from a peripheral portion of the concave portion to a outer surface of the leg portion.
3 . The three-dimensional circuit board according to claim 2 , wherein a circuit component for performing signal processing to an output from the fingerprint sensor element is mounted on a region surrounded by the metal film within the leg portion.
4 . The three-dimensional circuit board according to claim 1 , wherein a surface of the mounting portion at which the concave portion is provided is formed so as to conform to a surface of the housing on the periphery of the window hole.
5 . The three-dimensional circuit board according to claim 1 further comprising a pair of guide portions that oppose with each other on the surface of the mounting portion with the detecting surface interposed therebetween, protrude further than the detecting surface through the window hole, and position a finger relative to the detecting surface.
6 . A fingerprint sensor device comprising:
a fingerprint sensor element that converts a fingerprint image obtained from its flat detecting surface into an electric signal for outputting; and
a three-dimensional circuit board on which the fingerprint sensor element is mounted, the detecting surface being exposed to the outside of a housing of an electronic device through a window hole provided at the housing, and which is mounted on a printed wiring board accommodated in the housing,
the three-dimensional circuit board comprising:
a synthetic resin molded component that includes a mounting portion at which a concave portion for accommodating the fingerprint sensor element, and at least one leg portion whose end portion is connected to the mounting portion and whose other end portion is mounted on the printed wiring board, the mounting portion and the leg portion being formed integrally; and
a conductive body that is provided on the synthetic resin molded component and electrically connects an output terminal of the fingerprint sensor element mounted on the mounting portion and a conductive pattern formed on the printed wiring board.
7 . The fingerprint sensor device according to claim 6 , wherein the three-dimensional circuit board further comprises a metal film for electromagnetic shield that is extended from a peripheral portion of the concave portion to a outer surface of the leg portion.
8 . The fingerprint sensor device according to claim 7 , wherein a circuit component for performing signal processing to an output from the fingerprint sensor element is mounted on a region surrounded by the metal film within the leg portion.
9 . The fingerprint sensor device according to claim 6 , wherein a surface of the mounting portion at which the concave portion is provided is formed so as to conform to a surface of the housing on the periphery of the window hole.
10 . The fingerprint sensor device according to claim 6 , wherein the three-dimensional circuit board further comprises a pair of guide portions that oppose with each other on the surface of the mounting portion with the detecting surface interposed therebetween, protrude further than the detecting surface through the window hole, and position a finger relative to the detecting surface.
11 . A three-dimensional circuit board that supports a fingerprint sensor which accommodates a fingerprint sensor element that converts a fingerprint image obtained from its flat detecting surface into an electric signal for outputting in a package, the detecting surface being exposed to the outside of a housing of an electronic device through a window hole provided at the housing, and that is mounted on a printed wiring board accommodated in the housing,
the three-dimensional circuit board comprising:
at least one support which supports the fingerprint sensor at its end portion and whose other end portion is mounted on the printed wiring board; and
a conductive body that is provided on the support and electrically connects an output terminal of the fingerprint sensor and a conductive pattern formed on the printed wiring board.
12 . A fingerprint sensor device comprising:
a fingerprint sensor that accommodates a fingerprint sensor element which converts a fingerprint image obtained from its flat detecting surface into an electric signal for outputting in a package; and
a three-dimensional circuit board that supports the fingerprint sensor, the detecting surface being exposed to the outside of a housing of an electronic device through a window hole provided at the housing, and that is mounted on a printed wiring board accommodated in the housing,
the three-dimensional circuit board comprising:
at least one support which supports the fingerprint sensor at its end portion and whose other end portion is mounted on the printed wiring board; and
a conductive body that is provided on the support and electrically connects an output terminal of the fingerprint sensor and a conductive pattern formed on the printed wiring board.