source:

http://http://en.wikipedia.org/wiki/Smart_card

http://patents.globalspec.com/partnerContent/PatentDetail?docId=16859014395&SrchItem=7&frmqry=smart%20card%20connector&kqid=90332463&show=patents

A smart card, chip card, or integrated circuit card (ICC), is defined as any pocket-sized card with embedded integrated circuits which can process information. This implies that it can receive input which is processed - by way of the ICC applications - and delivered as an output. There are two broad categories of ICCs. Memory cards contain only non-volatile memory storage components, and perhaps some specific security logic. Microprocessor cards contain volatile memory and microprocessor components. The card is made of plastic, generally PVC, but sometimes ABS. The card may embed a hologram to avoid counterfeiting. Using smartcards is a popular form of strong authentication for single sign-on within large organizations.

A smart card connector for use with a smart card includes both data contacts and normally open end position contacts. The smart card includes both data contact pads and at least one end position contact pad positioned to engage the end position contacts. When the smart card is fully inserted in the connector card slot so that the data contacts are aligned with the data contact pads, two normally open end position contacts engage the end position contact pad. The two end position contacts are then electrically commoned to provide a signal to a card reader that the smart card is fully inserted and data communication can begin between the smart card and the card reader.