CA2382510A1 - Method and system for laser writing microscopic data spots on cards and labels readable with a ccd array - Google Patents

Method and system for laser writing microscopic data spots on cards and labels readable with a ccd array Download PDF

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Publication number
CA2382510A1
CA2382510A1 CA002382510A CA2382510A CA2382510A1 CA 2382510 A1 CA2382510 A1 CA 2382510A1 CA 002382510 A CA002382510 A CA 002382510A CA 2382510 A CA2382510 A CA 2382510A CA 2382510 A1 CA2382510 A1 CA 2382510A1
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CA
Canada
Prior art keywords
data
optical memory
bars
spots
card
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002382510A
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French (fr)
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CA2382510C (en
Inventor
Jerome Drexler
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LaserCard Corp
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Individual
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Publication date
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Publication of CA2382510A1 publication Critical patent/CA2382510A1/en
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Publication of CA2382510C publication Critical patent/CA2382510C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
    • G06K1/126—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by photographic or thermographic registration
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2223/00—Details relating to semiconductor or other solid state devices covered by the group H01L23/00
    • H01L2223/544—Marks applied to semiconductor devices or parts
    • H01L2223/54473—Marks applied to semiconductor devices or parts for use after dicing

Abstract

A method and system for recording and storing digital data on optical memory cards (11) and labels using laser recording of optical storage media to create updatable, high resolution, two-dimensional bar codes, storing about 15 to more than 500 times as much digital data as the widely-adopted PDF-417, two-dimensional bar code. The optical storage media is of the DRAW (direct-read-after-write) type which requires no post processing. The optical storage media is pre-formatted with tracks (74) to precisely locate the recorded microscopic data spots (71). Groups of these microscopic data spots (71) form data bars which in turn form data pixels (72, 73, 82, 83) whose dimensions are at least four times greater linearly and 16 times greater in area than the microscopic data spots (71). The data pixels (72, 73, 82, 83) can be read with photodetector arrays such as CCD arrays.

Claims (10)

1. An updatable optical memory card readable with a photodetector array such as a CCD array comprising a wallet-size card having a strip of optical contrast pre-formatted DRAW laser recording material disposed thereon, a plurality of laser-written microscopic data spots create a plurality of data bars recorded on said strip with at least two said data bars on each track having a track width at least three times greater than the width of the data bars and the combination of at least two adjacent tracks having said data bars recorded thereon, forming a data pixel among many data pixels as a region whose smallest dimension is at least seven microns and which encompasses at least 2n data bars which are approximately n to 2n track widths long and that portion of the n tracks encompassed containing at least 2n said data bars, and where said data pixels are capable of being read with a photodetector array such as a CCD
array.
2. The updatable optical memory card of claim 1 where the number of tracks n can range from one to ten.
3. The updatable optical memory card of claim 1 where the data pixel linear size dimension ranges from approximately one track width to ten times the track width.
4. The updatable optical memory card of claim 1 where said card is updatable both in writing and reading numerous series of microscopic data spots and in writing and reading numerous series of data pixels on the same card or different cards.
5. The updatable optical memory card of claim 1 where some of the data recorded in microscopic data spots on said card is also recorded redundantly on the same card using data pixels which are at least twice as large as said microscopic data spots.
6. An optical memory label tape or individual labels for attaching to documents and manufactured products comprising a strip of optical contrast pre-formatted DRAW
laser recording material in the form of single or multiple labels in the form of a tape, a plurality of laser-written microscopic data spots create a plurality of data bars recorded on said strip with at least two said data bars on each track having a track width at least three times greater than the width of the data bars and the combination of at least two adjacent tracks having said data bars recorded thereon, forming a data pixel among many data pixels as a region whose smallest dimension is at least seven microns, that encompasses at least 2n data bars which are approximately n to 2n track widths long and that portion of the n tracks encompassed containing at least 2n said data bars, and where said data pixels are capable of being read with a photo-detector array such as a CCD array.
7. The optical memory label of claim 6 where the number of tracks n can range from one to ten.
8. The optical memory label of claim 6 where the data pixel linear size dimension ranges from approximately one track width to ten times the track width.
9. The optical memory label tape or individual labels of claim 6 which are utilized for authentication, validation, authorization, or identification of said documents or manufactured products.
10. The optical memory label tape or individual labels of claim 6 where the labels that comprise the tape or the individual labels have serial numbers or other features that distinguish one label from another label.
CA2382510A 1999-09-03 2000-07-13 Method and system for laser writing microscopic data spots on cards and labels readable with a ccd array Expired - Fee Related CA2382510C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/389,397 US6145742A (en) 1999-09-03 1999-09-03 Method and system for laser writing microscopic data spots on cards and labels readable with a CCD array
US09/389,397 1999-09-03
PCT/US2000/019166 WO2001018800A1 (en) 1999-09-03 2000-07-13 Method and system for laser writing microscopic data spots on cards and labels readable with a ccd array

Publications (2)

Publication Number Publication Date
CA2382510A1 true CA2382510A1 (en) 2001-03-15
CA2382510C CA2382510C (en) 2010-06-22

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CA2382510A Expired - Fee Related CA2382510C (en) 1999-09-03 2000-07-13 Method and system for laser writing microscopic data spots on cards and labels readable with a ccd array

Country Status (5)

Country Link
US (3) US6145742A (en)
EP (1) EP1218878B1 (en)
JP (1) JP2003509754A (en)
CA (1) CA2382510C (en)
WO (1) WO2001018800A1 (en)

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Also Published As

Publication number Publication date
US6338433B1 (en) 2002-01-15
US6318633B1 (en) 2001-11-20
CA2382510C (en) 2010-06-22
JP2003509754A (en) 2003-03-11
EP1218878A1 (en) 2002-07-03
US6145742A (en) 2000-11-14
EP1218878B1 (en) 2012-02-15
WO2001018800A1 (en) 2001-03-15

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