Multi-Layer flexible circuit is a combination of single and/or double-sided flex circuits laminated with thermoset adhesive onto a single and/or double-sided FR-4 clad material.  Three or more flexible conductive layers with flexible insulating layers between each one, which are interconnected by way of plated through holes (PTH). Layers range from 1 to 8 layers in the flex area and up to 10 layers in the rigid area.