| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a printed substrate which stops power supply from a power source before water reaches a circuit block during water exposure of the circuit block. <P>SOLUTION: A printed substrate 1 of this invention is provided with a plate like base material 8, a circuit block 2, at least one ground pattern 3, 5, a conductive pattern for short circuits 4, and a power source pattern for supply 6 supplying electric power. The circuit block 2 is disposed on a surface layer. The power source pattern for supply 6 includes electric power cut off means 7 cutting off the power supply. The circuit block 2 is enclosed by the ground patterns 3, 5, the conductive pattern for short circuits 4 which is not electrically connected with the ground patterns 3, 5 on the surface layer of the base material 8. The power source pattern for supply 6 is connected with the circuit block 2 and includes a portion extending on the surface layer and a portion extending in an area other than the surface layer so as to connect with the conductive pattern for short circuits 4 avoiding the connection with the ground patterns 3, 5. <P>COPYRIGHT: (C)2012,JPO&INPIT |
