Patent ID: 8270179

Claim:
A printed circuit board comprising: a primary mounting surface and a secondary mounting surface, to which at least first and second individual boards are provided, the primary mounting surface being provided on a front side of the printed circuit board and the secondary mounting surface being provided on a back side of the printed circuit board, a first circuit board pattern, on which a first component and a third component are mountable, provided on the primary mounting surface side of the first individual board, and a second circuit board pattern, on which a second component and the third component are mountable, provided on the secondary mounting surface side of the first individual board, the first circuit board pattern, on which the first component and the third component are mountable, provided on the secondary mounting surface side of the second individual board, and the second circuit board pattern, on which the second component and the third component are mountable, provided on the primary mounting surface side of the second individual board, wherein: in a case where the first component and the third component are mounted on the first circuit board pattern of the first individual board and the second component is mounted on the second circuit board pattern of the first individual board without mounting the third component on the second circuit board pattern of the first individual board, or in a case where the first component is mounted on the first circuit board pattern of the second individual board without mounting the third component on the first circuit board pattern of the second individual board, and the second component and the third component are mounted on the second circuit board pattern of the second individual board, in the first and second individual boards, traces for the third component are provided so that electrical connections between the third component and the other components are identical between the case where the third component is mounted on the first circuit board pattern, and the case where the third component is mounted on the second circuit board pattern.