US Patent 11894293 Circuit structure and electronic structure

A circuit structure and an electronic structure are provided. The circuit structure includes a low-density conductive structure, a high-density conductive structure and an electrical connection structure. The high-density conductive structure is disposed on the low-density conductive structure. The electrical connection structure extends through the high-density conductive structure and is electrically connected to the low-density conductive structure. The electrical connection structure includes a shoulder portion.