Conductive pads defined by embedded traces

An assembly comprising:

• a first component including a dielectric region having an exposed surface;
• a continuous groove extending in a path along the surface, the groove having a floor disposed below the surface;
• a conductive pad exposed at the surface permitting electrical interconnection of the first component with a second component, the conductive pad defined by a conductive element having cross-sectional dimensions at least partly defined by the groove, extending from the floor of the groove to a height above the floor, and having at least a portion extending in at least one of an oscillating or spiral path along the surface, the path being formed so as to intersect a straight line along the surface more than three times, the conductive element having at least two adjacent portions separated by a portion of the surface of the dielectric region, and the conductive element having a length along the surface that is at least ten times greater than the height;
• and
• an electrically conductive bonding material having a melting temperature below 300° C. joined to the conductive pad and bridging the portion of the surface between the at least two adjacent portions of the conductive element.