A method creates a banking card that may be a wireless banking card. The banking card has an antenna with an open circuit that prevents the banking card from functioning correctly until it is received by a banking customer the card is to belong to. A cavity is formed within the banking card near the open circuit and a thin wall is created between the cavity and the open circuit. The cavity is filled with a flowable electrical conductor that may be a liquid metal such as mercury or galinstan. Instruction indications are provided on the banking card indicating to a banking customer how to manipulate the banking card to cause the liquid conductor to flow and remove the open circuit and allow the banking card to function correctly.

Provided is a card with a built-in electronic component, which has a superior button click sensation. A card of the present invention into which is built-in a module substrate upon which an electronic component has been disposed is provided with: a front cover sheet stacked upon a side above the module substrate; an adhesion layer adhering between the module substrate and the front cover sheet; and a dome switch which is disposed upon the module substrate, and by way of the card upper surface being pressed, the switch's movable portion deforms to the module substrate side so that the electrical contact comes into tactile contact with the module substrate in order to operate the card; wherein the switch's movable portion is such that the upper surface does not adhere to the adhesion layer and the deformation to the module substrate side is unrestrained with respect to the adhesion layer.

A device according to claim 6, characterised in that the interrupting zone is positioned outside the switch zone in which two wires (54, 56) of a circuit are so arranged as to cooperate with the switch are positioned.

Provided is a card with a built-in electronic component, which has a superior button click sensation. A card of the present invention into which is built-in a module substrate upon which an electronic component has been disposed is provided with: a front cover sheet stacked upon a side above the module substrate; an adhesion layer adhering between the module substrate and the front cover sheet; and a dome switch which is disposed upon the module substrate, and by way of the card upper surface being pressed, the switch's movable portion deforms to the module substrate side so that the electrical contact comes into tactile contact with the module substrate in order to operate the card; wherein the switch's movable portion is such that the upper surface does not adhere to the adhesion layer and the deformation to the module substrate side is unrestrained with respect to the adhesion layer.

The invention relates to a switch spring arrangement for operating a switch, comprising a first spring arm that can be actuated by a card, and at least one second spring arm, with a contact dome at the free end thereof, for operating a switch that is located beneath the contact dome of the second spring arm, wherein the first spring arm can be actuated by the second spring arm.