Giesecke & Devrient Gmbh

Bernhard Büttner

Robert Griesmeier

Thomas Tarantino

Karl Eglof Hartel

Ludger Holtmann

A method includes exchanging data between a chip card and a terminal in a contact-based manner via a contact field. The method comprises the steps of: activating a first contact assignment in response to a first communication protocol present on the contact field and occupying a first part of contact surfaces of the contact field; recognizing a change of the communication protocol from a first communication protocol to a second communication protocol with a protocol recognition unit in the chip card; and activating a second contact assignment in response to the recognized second communication protocol occupying a second part of contact surfaces of the contact field. The first and the second part of contact surfaces of the contact field are selected from an ISO-7816-2 contact field having a maximum of six contact surfaces and the second communication protocol requires at least two data lines.

Method for the data exchange between a terminal and a chip card

A method for manufacturing a portable data carrier includes the steps of: providing a carrier band having an upper side and a lower side disposed opposite the upper side including a contact field formed with at least one contact area; arranging a semiconductor circuit on the lower side of the carrier band and electroconductively connected with the corresponding contact area; and carrying out an injection molding process on the lower side a potting compound formed around the semiconductor circuit and having outer dimensions according to a portable data carrier standard specification. An injection channel for injecting the potting compound is arranged on a side of the potting compound mold parallel to the lower side, and after the injection of the potting compound a depression remains in the finished data carrier due to the injection channel. A portable data carrier includes the features and is used as a subscriber identity module.

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Germering, Germany

Bernhard Büttner