A solid-circuit transformer in double-layer symmetric type consists of the line sections of a first, a second, a fifth and a sixth conductor sections which are all laid in a first insulation layer. With the first and the fifth conductor sections being symmetric to the second and the sixth conductor sections at a first straight line. In addition, the transformer consists of the third and the fourth conductor sections which are laid in a second insulation layer and are symmetric to a second straight line as well as consists of a first connection conductor section being connected between the fifth and the second conductor sections, also the second connection conductor section being connected in between the sixth and the first conductor sections. |