Stretchable rigid-flex interconnection structure with gradient stiffness

A stretchable rigid-flex interconnection structure with gradient stiffness, comprising:

• a support body;
• a stretchable substrate, disposed on one side of the support body;
• a stretchable circuit layer and a non-stretchable circuit layer, both disposed on a side that is of the stretchable substrate and that is away from the support body, wherein the non-stretchable circuit layer is disposed opposite to the support body, the non-stretchable circuit layer is electrically connected to the stretchable circuit layer, the non-stretchable circuit layer and the stretchable circuit layer have an overlapping region at an interface, and a projection of the support body onto the stretchable substrate covers a projection of the non-stretchable circuit layer onto the stretchable substrate;
• and
• a sealing layer, disposed on a side that is of the stretchable circuit layer and that is away from the stretchable substrate, and covering the stretchable circuit layer, wherein
• the stretchable circuit layer has a stretching direction and a normal direction, and the support body has gradient stiffness along the stretching direction of the stretchable circuit layer, or the support body has gradient stiffness along the normal direction of the stretchable circuit layer.