Data storage device, apparatus and method for using same
First Claim
1. A card processing system comprising:
- a data processing station; and
a portable card including;
a protective housing; and
a data storage device movably coupled to the protective housing for interacting with the data processing station when the portable card carrier and the data processing station are moved relative to each other, said data storage device including;
a substrate having a generally rectangular shape;
a hard disk drive recording medium including at least one layer of high density, high coercivity magnetic material including a plurality of magnetic domains for storing magnetic signals, said plurality of magnetic domains having an areal density of between 2 megabits per sq. in. to about 10 gigabits per sq. in. and having a storage capability of more than 500 megabytes; and
a hard, abradeable protective coating formed on said magnetic material layer,wherein the protective coating has at least one layer which includes a magnetically permeable, magnetically saturable material, andwherein the protective housing has at least one housing section that is movable relative to the data storage device such that said data storage device is shielded by said at least one housing section when said at least one housing section is in a first position, and said data storage device is operably exposed for interaction with the data processing station when said at least one housing section is in a second position.
3 Assignments
0 Petitions
Accused Products
Abstract
A data storage device for use as a portable card, magnetically encodeable card, magnetic credit card or the like is shown. The data storage device includes a substrate having at least one surface. A high density, magnetically coercive material layer is disposed on or is deposited on the substrate for storing magnetic signals. The magnetically coercive material may have an axis of magnetization that is oriented in a predetermined direction relative to the at least one surface of the substrate. A layer of non-magnetically material is disposed on the substrate for defining an exchange break layer. A relatively hard, abradeable protective coating is formed on said magnetic material layer and is selected to have a thickness between a maximum thickness which would materially attenuate magnetic signals passing between the magnetic material layer and a transducer and a minimum thickness enabling said protective coating to be abraded by usage in an ambient natural atmosphere operating environment for removing therefrom a known quantity of the protective coating. The protective coating may comprise one, two or more layers of materials.
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Citations
25 Claims
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1. A card processing system comprising:
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a data processing station; and a portable card including; a protective housing; and a data storage device movably coupled to the protective housing for interacting with the data processing station when the portable card carrier and the data processing station are moved relative to each other, said data storage device including; a substrate having a generally rectangular shape; a hard disk drive recording medium including at least one layer of high density, high coercivity magnetic material including a plurality of magnetic domains for storing magnetic signals, said plurality of magnetic domains having an areal density of between 2 megabits per sq. in. to about 10 gigabits per sq. in. and having a storage capability of more than 500 megabytes; and a hard, abradeable protective coating formed on said magnetic material layer, wherein the protective coating has at least one layer which includes a magnetically permeable, magnetically saturable material, and wherein the protective housing has at least one housing section that is movable relative to the data storage device such that said data storage device is shielded by said at least one housing section when said at least one housing section is in a first position, and said data storage device is operably exposed for interaction with the data processing station when said at least one housing section is in a second position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A card processing system comprising a portable card and a data processing station, wherein the portable card comprises:
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a protective housing; and a data storage device movably coupled to the protective housing for interacting with the data processing station when the portable card and the data processing station are moved relative to each other, said data storage device including; a substrate having a generally rectangular shape and a pair of longer sides which are longer than a pair of shorter sides shape; a hard disk drive storage medium including at least one layer of high density, high coercivity magnetic material including a plurality of magnetic domains for storing magnetic signals, said magnetic material having an areal density of about 10 gigabits per sq. in and having a storage capability in the range of 1 megabyte and 500 megabytes; and a diamond-like hardness, abradeable protective coating formed on said magnetic material layer, wherein protective coating has at least one layer which includes a magnetically permeable, magnetically saturable material, and wherein the protective housing has at least one housing section that is movable relative to the data storage device such that data storage device is shielded by said at least one housing section when said at least one housing section is in a first position, and said data storage device is operably exposed for interaction with the data processing station when said at least one housing section is in a second position. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification