Interposer and electronic apparatus

An electronic apparatus comprising:

• a case;
• a circuit substrate accommodated in the case;
• a first flat cable including a first signal line and a first ground line;
• a second flat cable including a second signal line and a second ground line;
• an interposer including an insulating element body including a bottom surface, a top surface, and a plurality of side surfaces connecting the bottom surface with the top surface, a wiring electrode provided inside the element body, and a first terminal electrode and a second terminal electrode provided at the top surface of the element body, wherein the first terminal electrode includes a first signal terminal electrode connected to the first signal line and a first ground terminal electrode connected to the first ground line, the second terminal electrode includes a second signal terminal electrode connected to the second signal line and a second ground terminal electrode connected to the second ground line, a through-hole penetrates through the bottom surface and the top surface of the element body, a metal fixing member connecting electrode is provided at the top surface of the element body or an inner wall of the through-hole, the first signal terminal electrode and the second ground terminal electrode are electrically connected by the wiring electrode, and the first ground terminal electrode, the second ground terminal electrode, and the metal fixing member connecting electrode are electrically connected;
• and
• a bar-shaped metal fixing member;
• wherein
• a fixing hole to fix the metal fixing member is provided in the case or the wiring substrate;
• after the metal fixing member is inserted in the through-hole so that the metal fixing member is electrically connected to the metal fixing member connecting electrode, the metal fixing member is fixed to the fixing hole, and the interposer is mounted at the case or the circuit substrate;
• and
• the first signal line is electrically connected to the first signal terminal electrode of the interposer and the second signal line is electrically connected to the second signal terminal electrode by a conductive bonding material, and the first ground line is electrically connected to the first ground terminal electrode of the interposer and the second ground line is electrically connected to the second ground electrode.