STRETCHABLE ELECTRONIC SYSTEM BASED ON CONTROLLED BUCKLED FLEXIBLE PRINTED CIRCUIT BOARD (PCB)

摘要

A microelectronic device system and a method of forming a microelectronic device are described. The microelectronic device includes a flex printed circuit board (PCB) having two or more electrical sub-systems that are electrically coupled by a plurality of conductive traces, where the flex PCB may be a buckled flex PCB. The microelectronic device includes a plurality of anchoring sites formed on a backside surface of the flex PCB. The microelectronic device encapsulates an elastomer over the flex PCB, the electrical sub-systems, and the conductive traces. The microelectronic device may stretch in a unidirectional and bidirectional axis. The microelectronic device may have electronic components attached to the electrical sub-systems. The microelectronic device may have stretchable segments where each of the stretchable segments is formed between a pair of anchoring sites. The microelectronic device may have three-dimensional (3D) conductive traces, where the 3D conductive traces are 3D meandering traces.