IC card having fingerprint sensor designed to withstand bending
First Claim
1. A chip card comprising a card of a plastics material which is capable of elastically withstanding a relative curvature, in which a microelectronic data processing chip is encased and to which a thin microelectronic wafer of a semiconductor material is affixed,said wafer being sub-divided into a smaller number of juxtaposed chips disposed in a given layout with electrical links joining said juxtaposed chips so as to provide electrical continuity therebetween, and said juxtaposed chips being separated from one another so that adjacent chips are separated from each other by a separating strip of said plastics material the separating strip separating said adjacent chips from each other being of a predetermined width and said width being such as to permit each said separating strip of plastics material to be subjected to a bending corresponding to the relative curvature which the card of plastics material is capable of elastically withstanding, without causing said adjacent chips to become unstuck and/or break.
4 Assignments
0 Petitions
Accused Products
Abstract
A chip card comprising a card made from a plastics material (1) capable of elastically withstanding a relative bending and in which a microelectronic data processing chip (4) is encased, a thin microelectronic wafer (5) made from a semiconductor material, such as a finger print sensor, additionally being joined to the card (1). Said wafer (5) is sub-divided into a small number of juxtaposed chips (7) disposed in a given pattern and separated from one another by a predetermined distance (d) which is sufficient for each separating strip (8) of plastics material to be slightly bent without causing adjacent chips (7) to become unstuck and/or rupture; electrical links are established between the chips to provide electrical continuity.
117 Citations
10 Claims
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1. A chip card comprising a card of a plastics material which is capable of elastically withstanding a relative curvature, in which a microelectronic data processing chip is encased and to which a thin microelectronic wafer of a semiconductor material is affixed,
said wafer being sub-divided into a smaller number of juxtaposed chips disposed in a given layout with electrical links joining said juxtaposed chips so as to provide electrical continuity therebetween, and said juxtaposed chips being separated from one another so that adjacent chips are separated from each other by a separating strip of said plastics material the separating strip separating said adjacent chips from each other being of a predetermined width and said width being such as to permit each said separating strip of plastics material to be subjected to a bending corresponding to the relative curvature which the card of plastics material is capable of elastically withstanding, without causing said adjacent chips to become unstuck and/or break.
Specification