Method of manufacturing stretchable circuit assemblies

A method of making a stretchable circuit assembly comprising the steps of:

• providing flexible circuits, a first printed circuit board, and a second printed circuit board;
• shaping the flexible circuits to have an oscillating configuration;
• and
• forming a stretchable interconnect such that the flexible circuits are embedded within the stretchable interconnect;
• wherein
• the stretchable interconnect has a thickness in a smallest dimension of the stretchable interconnect;
• each of the flexible circuits has a thickness in a smallest dimension of the flexible circuits, has a width perpendicular to the thickness of the flexible circuits, is connected to the first and second printed circuit boards, and includes two or more conductive lines that are spaced from one another along the width of the flexible circuits;
• the width of the flexible circuits is substantially the same as the thickness of the stretchable interconnect;
• and
• the flexible circuits are embedded in the stretchable interconnect such that the conductive lines are spaced apart from one another along the thickness direction of the stretchable interconnect and such that the thickness of the stretchable interconnect is parallel or substantially parallel to the width of the flexible circuits.