本发明提供一种内部电路复杂，但电性连接极为容易电路设备(10)。 本发明系为：在构成多层配线之导电图案(12)的最上层导电图案(12A)上，安装第1电路组件(13)。在最下层导电图案且在设备背面露出的第4导电图案(12D)上，安装第2电路组件(14)及连接器(15)。借此结构，得以提供具有数个电路组件的电路设备(10)。又，借由将连接器(15)安装于设备背面，得以容易地与外部电性连接。

The present invention provides a circuit device (10), in which a complicated electrical circuit is installed, and the electrical connection thereof is easy, wherein first circuit element (13) is mounted to conductive pattern (12A) which is formed on the top layer of conductive pattern (12) constituting a multilayered wiring. Second circuit element (14) and connector (15) are mounted on the fourth conductive pattern (12D) being the lowest layer of the conductive pattern and exposing from the back surface of the device. Thus providing a circuit device having more circuit elements is feasible. Furthermore, mounting connector (15) on the back surface of the device makes the electrical connection with external circuit easy to carry out.