Systems and methods allow for the integrated circuit cards (ICCs) to removably couple to each other and transmit information to an access device as a single device. One among the two or more ICCs coupled together may read data from the remaining ICCs and provide the data to an access device via contactless communication. The ICC may include a substrate; an integrated circuit embedded in the substrate; input ports exposed on a first surface of the substrate, and output ports exposed on a second surface of the substrate. The input ports and the output ports are electrically coupled to the integrated circuit. The output ports are configured to be removably coupled to the input ports of a second ICC.

Coupling frames (CF) for smartcards (SC) having contactless capability. Openings (MO) for transponder chip modules (TCM) may have various non-rectangular shapes. Slits in the coupling frames may have various shapes, and may extend from anywhere in the opening to anywhere on the periphery (outer edge) of the coupling frame. The slit may be filled. A slit area of the coupling frame may be reinforced. The coupling frame may be one or more metal layers in the card. The slits of two coupling frames may have different shapes than one another. The coupling frame may constitute the entire card body. The coupling frame may be smaller than the overall card body.

Disclosed are examples of transaction cards incorporating aluminum or aluminum alloys. The aluminum can be extracted or recycled from a retired aircraft. Other materials can also be incorporated into the transaction card to provide sufficient weight and rigidity to the transaction card. Stainless steel can be incorporated into the construction of the card in combination with aluminum to provide a desired user experience.

A transaction card having a discontinuous metal stratum with a desired degree of electrical eddy current disruption disposed on a surface of a first layer, such as a glass or other transparent layer. A transaction module disposed in the first layer is electrically isolated from the discontinuous metal stratum. The discontinuous metal stratum may include a plurality of isolated metal features that form a halftone pattern, such as a pattern that is visibly opaque to the naked eye.

A “core” or “inlay” for a smartcard may comprise a first metal layer and a second metal layer, and may be formed by folding a single metal layer upon itself. A module cavity may be formed in the first metal layer by laser cutting, prior to laminating. An adhesive layer may be disposed between the two metal layers. A module opening may be formed in the second metal layer by milling, after laminating the first metal layer to the second metal layer. A slit in a metal layer may extend from an outer edge of the layer to the cavity or opening, thereby forming a coupling frame. The slit may have a termination hole at either end or at both ends of the slit. The slits of two metal layers may be positioned differently than one another.

Example embodiments of systems and methods for milling patterns for a card are provided. A chip fraud prevention system include a device including a chip. The chip may be at least partially encompassed in a chip pocket. The chip pocket may include one or more shapes. The one or more shapes may include one or more peaks and one or more valleys. One or more connections may be communicatively coupled to at least one surface of the chip. The one or more connections may be placed between at least one of the one or more peaks or one or more valleys.

The disclosed embodiments provide a payment card. The payment card may have a first face and a second face opposite the first. Additionally, the payment card may comprise a first smart chip, the first smart chip having contacts that are electronically accessible from the first face of the card. The payment card may further comprise a first antenna coupled to the first smart chip, the first antenna providing near-field contactless access to the first smart chip and a second smart chip, the second smart chip having contacts that are electronically accessible from the second face of the card. Additionally, the payment card may comprise a second antenna coupled to the second smart chip, the second antenna providing near-field contactless access to the second smart chip and an RF block that electronically isolates the first antenna and the second antenna from each other.

Provided are transaction cards including an expanded identification ship. In some approaches, a transaction card may include a body having a first main side opposite a second main side, wherein the body defines an outer perimeter including a first end perimeter opposite a second end perimeter, and a first side perimeter opposite a second side perimeter. The transaction card may further include an identification chip having a plurality of contacts, wherein a first contact of the plurality of contacts extends to at least one of the following: the first end perimeter, the second end perimeter, the first side perimeter, and the second side perimeter.

A mobile device includes a smartcard controller that does not rely on power received from an interrogating RF field. The mobile device also includes a small inductive device capable of inductive coupling with an RFID reader. The smartcard controller includes circuitry to modulate an impedance of a port coupled to the inductive element when in the presence of an interrogating RF field at substantially 13.56 MHz.

An internal voltage generator of a smart card and a smart card including the same. The internal voltage generator may include: a mode detector that generates a mode signal indicating a contact mode or a contactless mode; a low-drop out (LDO) regulator including an error amplifier, where the LDO regulator is responsive to the mode signal to: in the contact mode, drive the error amplifier with a second driving voltage to generate an error voltage, and regulate the second driving voltage based on the error voltage to generate a first output voltage, and in the contactless mode, drive the error amplifier with the first driving voltage to generate the error voltage, and regulate the second driving voltage based on the error voltage to generate the first output voltage.