Transformer device and semiconductor device

A transformer device comprising:

• a planar first coil;
• a first insulation layer being provided above the first coil;
• an intermediate layer being provided above the first insulation layer;
• a second insulation layer being provided above the intermediate layer;
• a planar second coil being provided on an upper surface of the second insulation layer and facing the first coil;
• and
• a pad having conductivity being provided above the second insulation layer and being connected to one end side of the second coil, wherein
• the pad is disposed at a position at least partially overlapping the intermediate layer in plan view,
• the first insulation layer and the second insulation layer are each an organic insulation layer,
• the intermediate layer is a metal layer or a glass layer, and
• the intermediate layer covers an entire upper surface and side surface of the first insulation layer.