The rear of a thin IC card is provided with a jack (42A, 42B, FIG. 4) that can receive a multi-contact audio type plug (40) having a diameter that is more than half the thickness of the card. The circuit board has a slot (60) that opens into the rear of the card. A U-shaped insulative block (80) is mounted...http://www.google.fr/patents/US5947771?utm_source=gb-gplus-shareBrevet US5947771 - Audio/power jack
