Method for making a laser recordable wallet-size plastic card

• US 4,542,288 A
• Filed: 11/21/1984
• Issued: 09/17/1985
• Est. Priority Date: 02/27/1981
• Status: Expired due to Term

• Current Assignee: LaserCard Corp. (Assa Abloy AB)
• Original Assignee: Drexler Technology Corporation (Assa Abloy AB)
• Inventors: Drexler, Jerome
• Primary Examiner(s): Pitts, Harold I.
• Application Number:
  US06/673,573
• Time in Patent Office: 300 Days
• Field of Search: 235/382.5, 235/468, 235/487, 235/488, 358/128.5, 346/76 L
• US Class Current: 235/487
• CPC Class Codes: G06K 19/06046 Constructional details
• CPC Class Codes: G06K 19/14 the marking being sensed by radiation
• CPC Class Codes: G07C 9/25 using biometric data, e.g. fingerprints, iris scans or voice recognition
• CPC Class Codes: G11B 17/34 Guiding record carriers during transducing operation, e.g. for track following G11B17/32 takes precedence
• CPC Class Codes: G11B 7/0033 with cards or other card-like flat carriers, e.g. flat sheets of optical film
• CPC Class Codes: G11B 7/24 Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the arrangement of information on the carrier G11B7/007
• CPC Class Codes: G11B 7/26 Apparatus or processes specially adapted for the manufacture of record carriers
• CPC Class Codes: Y10S 283/904 Credit card

Abstract

A method for making a data card involving photolithographically prerecording information, such as reference position information or servo tracks, on a strip of high resolution, direct-read-after-write laser recording material, then adhering the strip to a card such that the strip is recordable in place. A protective transparent laminating material is bonded to the recording surface and then user information is recorded on the strip using a laser aimed at the strip through the laminating material.

Claims

1. A method of making an optical data card comprising,

prerecording information on a strip of laser recording material,

adhering said strip to a wallet-size card base, said strip being laser recordable in place on said card,

bonding a protective transparent laminating material to the recording surface of said strip, and

recording information on said strip with a laser through the laminating material.

2. A method of making an optical data card for information storage and recording comprising,

photolithographically prerecording information on a strip of high resolution, direct-read-after-write laser recording material,

adhering said strip to one side of a wallet-size plastic card base, said strip being laser recordable in place on said card,

bonding a protective transparent plastic laminating material to the recording surface of said strip, and

recording information on said strip with a laser through the laminating material.

3. An optical data card for information storage and recording comprising,

a wallet-size plastic card base,

a prerecorded strip of high resolution, direct-read-after-write laser recording material adhered to one side of the card base, said material being laser recordable in place on said card and having a minimal laser recording capacity of 250,000 binary bits, having laser created spots in a surrounding optically contrasting field of said strip, with a dimension of said spots being less than 25 microns, the optical reflective contrast ratio at near infrared wavelengths of said spots with respect to the surrounding field being at least two to one, and

a transparent plastic laminating material bonded to the base over said material.

4. The card of claim 3 wherein said strip contains data spots which are oblong and aligned in paths.

5. The card of claim 3 wherein said data spots are clustered and spaced in a self-clocking geometric code arrangement.

6. An optical data card for information storage and recording comprising,

a wallet-size plastic card base,

a strip of high resolution, direct-read-after-write laser recording material adhered to one side of the card base, said material comprising a suspension of reflective metal particles in an organic colloid matrix, said material being laser recordable in place on said card and having a minimal laser recording capacity of 250,000 binary bits, having laser created spots in a surrounding optically contrasting field of said strip, with a dimension of said spots being less than 25 microns, the optical reflective contrast ratio at near infrared wavelengths of said spots with respect to the surrounding field being at least two to one, and

a transparent plastic laminating material protectively bonded to the base over said material.

7. The card of claim 6 wherein said strip includes previously recorded data bits represented by data spots which are oblong and aligned in paths.

8. The card of claim 6 wherein said data spots are clustered and spaced in a self-clocking geometric code arrangement.

9. The card of claim 6 wherein at least some of said spots comprise eye readable indicia.

10. The card of claim 6 wherein said strip has prerecorded reference position information.