JP2005132061A - Card and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate restrictions on layout of each image even if an optimum recording method is applied to each of a first rewritable image and a second unrewritable image, recorded on a card, and to prevent limitation on a use range of the card to the utmost. <P>SOLUTION: This card is equipped with a reversible information recording layer 34 wherein the first images such as a character 16 and a photograph 18 of a person's face are rewritably recorded by heat, and an irreversible information recording layer 36 which is arranged under the recording layer 34 and wherein the second images (a character 14, a water mark logo 20, etc.) substantially different from the first images are unrewritably recorded by laser light irradiation; and both the first images and the second images can be visually recognized from an upper part of the recording layer 34. The first images include images different from one another among a predetermined plurality of cards, and the second images include images common to one another among the plurality of cards. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention provides a first recording layer in which images such as characters, symbols, figures, or patterns are recorded so as to be rewritable by heat, and an image that is substantially different from the rewritable recorded image is irradiated with laser light. The present invention relates to a card having a second recording layer recorded in a non-rewritable manner and a method for manufacturing such a card.

  Conventionally, various cards including ID cards (identification) such as bank cards, credit cards, identification cards, members cards, employee cards and the like are well known.

  In recent years, with the spread of information through the spread of computer networks, such cards, Basic Resident Registers, and cards for health insurance insured cards, transportation commuter pass, commuter pass and credit card As a result of the fact that electronic information has been added to cards that have a prepaid function together using magnetic recording technology, IC technology, etc., this type of card and computer network have been combined, and the range of use of the card has become increasingly widespread. It's becoming something.

  By the way, according to the purpose and application of the card, a large number of various visible images such as characters, symbols, figures or pictures will be recorded. Depending on the purpose and character of each individual image, an optimum recording method is employed.

  That is, for example, in the case of a point card in which points as benefits are added each time a consumer purchases a product, as rewritable information (hereinafter, variable information or variable information is also used as a synonym) The image of the point should be recorded on the card in a rewritable manner, and the image as non-rewritable information such as the name of the chain store that the point card can use (hereinafter, fixed information is also used as a synonym) Should be recorded in a form that is basically not rewritable.

  Therefore, for the recording of the variation information, for example, a recording method based on thermoreversible change using a leuco dye disclosed in Patent Document 1 is adopted, and for the recording of the fixed information, normal printing is used. An irreversible recording method has been adopted.

  As described above, Patent Document 2, Patent Document 3 and the like can be cited as examples of appropriate recording methods depending on the purpose and character of the image recorded on the card.

  That is, the above-mentioned Patent Document 2 is the same as the reversible thermosensitive recording area in which visible information (hereinafter, visible information is also used as a synonym) is written so as to be erasable by the action of thermal energy by laser light irradiation. A visible information recording medium including an irreversible thermosensitive recording area in which visible information is written in an erasable manner using a writing means is disclosed.

Further, the above-mentioned Patent Document 3 is a check card or identification card having color image information, and this image information is composed of a light / dark part and a color part that complement each other to form overall information. In addition, there is disclosed a recording medium in which these portions are superimposed and one of them is inaccessible from the outside.
Japanese Patent No. 2678207 JP 2002-59575 A Japanese Patent No. 3426266

  However, since the visible information recording medium disclosed in Patent Document 2 always has a reversible thermosensitive recording area and an irreversible thermosensitive recording area on one medium surface, information that can be recorded in each area. There is a drawback that the amount is relatively reduced and the layout of each region is significantly restricted.

  Further, although the light / dark portion and the color portion are superimposed in the above-mentioned Patent Document 3, the purpose is to use information recorded in the light / dark portion and the color portion as a real photograph of a face photograph or the like. However, since the same information is intended for a security effect, there is a disadvantage that the range of use as a recording medium is relatively limited.

  The present invention has been made in view of the above points, and applies the optimum recording method to a rewritable image and a non-rewritable image recorded on a card, respectively, and the layout of each image. An object of the present invention is to provide a card and a method for manufacturing the same that do not impose restrictions and limit the range of use as much as possible.

In order to achieve the above object, one aspect of the card of the present invention is:
A first recording layer in which a first image such as a character, a symbol, a figure or a picture is recorded so as to be rewritable by heat;
A second image, which is disposed under the first recording layer and recorded in a non-rewritable manner by irradiation with a laser beam, such as characters, symbols, figures or designs that are substantially different from the first image. Recording layer of
Comprising
A card configured such that both the first image and the second image are visible from above the first recording layer;
The first image includes different images between a plurality of predetermined cards, and the second image includes an image common to the plurality of cards.

In order to achieve the above object, one aspect of the card manufacturing method of the present invention includes:
A first recording layer on which a first image such as a character, symbol, figure, or picture is recorded so as to be rewritable by heat, and is disposed under the first recording layer, and the first image is substantially the same. A second recording layer on which a second image such as a different character, symbol, figure, or pattern is recorded so as not to be rewritable by laser light irradiation, and the first image and the second image are Both are card manufacturing methods configured to be visible from above the first recording layer,
A first step of stacking and arranging the first recording layer on the second recording layer;
The second recording layer includes images common to a plurality of predetermined cards by irradiating the second recording layer with the laser beam through the first recording layer arranged in a stack in the first step. A second step of recording the image in a non-rewritable manner,
The first recording layer including images different from each other between the plurality of cards by heat with respect to the first recording layer on the second recording layer on which the second image is recorded in the second step. A third step of recording the image in a rewritable manner;
It is characterized by including.

  According to the present invention, the optimum recording method is applied to the rewritable image and the non-rewritable image recorded on the card, respectively, and there is no restriction on the layout of each image. It is possible to provide a card and its manufacturing method in which the range of use is not limited as much as possible.

  Hereinafter, the present invention will be described in more detail with reference to embodiments, but the present invention is not limited thereto.

  In the drawings, for the sake of explanation, the visible information on the reversible information recording layer (first recording layer) is “A” and “I”, and the visible information on the irreversible information recording layer (second recording layer) is “*”. "To express. In the figure, a broken line or a broken-line rectangle (perspective) represents omission of the card layer, and the recording information (“*”, “watermark / logo, etc.”) shown in light color is the recording information. Means that the layer is visible through the layer.

  Further, the number of layers forming the card and the layout are not limited to the following embodiments.

[First Embodiment]
1A and 1B show one card surface 12a (front surface in this example) and the other card surface 12b of a card using a magnetic stripe as an example of the card 10 according to the first embodiment of the present invention. It is a figure which shows (a back surface in this example). FIGS. 1C and 1D also show one card surface 12a (front surface in this example) and the other of the card using an IC chip as another example of the card 10 according to the first embodiment. It is a figure which shows the card | curd surface 12b (back surface in this example).

  The example of the card 10 shown in these figures is an example in which it is assumed that Tokyo Taro, an employee of XX Corporation, works as a temporary employee of □□ Corporation until March 31, 2004. For this reason, characters 14, characters 16, a face photograph 18, and a watermark / logo 20 are presented on the card surface 12a. Further, characters 22 and 24 are also presented on the card surface 12b. In this case, the visible information including the character 16 and the face photograph 18 is an image (first image) on the ticket face such as a character, symbol, figure, or pattern to be rewritten at any time due to employee transfer or retirement, that is, variable information. It is. On the other hand, the visible information consisting of the above-mentioned characters 14, the water mark / logo 20, etc. is an image (second image) on the card face such as characters, symbols, figures, or patterns that are desired to be rewritten, that is, fixed information. is there.

  In the card using the magnetic stripe shown in FIGS. 1A and 1B, the magnetic stripe 26 is incorporated in the card surface 12b, and the barcode 28 is presented. On the other hand, in the card using the IC chip shown in FIGS. 1C and 1D, the IC chip contact 30a is exposed on the card surface 12a, and the antenna 32 and the IC are provided between a plurality of layers constituting the card. A chip 30b is embedded.

  The card 10 according to this embodiment includes a recording layer having a two-layer structure including a first recording layer for recording the first image and a second recording layer for recording the second image. Is a card with That is, as shown in FIG. 1E, the recording layer of the card 10 includes a reversible information recording layer 34 that is a first recording layer and an irreversible information recording layer 36 that is a second recording layer. It has become arranged. In this case, the irreversible information recording layer 36 serves as both a card substrate and a second recording layer.

  That is, the card 10 composed of two or more layers according to the present embodiment has a reversible information recording composed of a first recording layer on which a first image such as a character, a symbol, a figure or a picture is recorded so as to be rewritable by heat. A card substrate comprising a layer 34 and a second recording layer on which a second image such as a character, symbol, figure, or pattern substantially different from the first image is recorded in a non-rewritable manner by laser light irradiation The irreversible information recording layer 36 includes a irreversible information recording layer 36, and is formed by a first step of stacking the irreversible information recording layer 36 below the reversible information recording layer 34.

  Here, for the reversible information recording layer 34, which is the first recording layer, a recording method based on a thermoreversible change using a leuco dye disclosed in Patent Document 1 can be adopted as an example.

  Examples of the irreversible information recording layer 36 that is the second recording layer include resins, and specifically, polyethylene (PE), polyethylene terephthalate (PET), vinyl chloride (PVC), polypropylene (PP ), Polystyrene (PS), polyacetal (POM), polyimide (PA), polycarbonate (PC), modified polyphenylene ether (PPE), polybutylene terephthalate (PBT), acrylonitrile butadiene styrene (ABS), epoxy (EP), phenol ( PF), urea (UF), etc. can be employed.

Examples of the laser include CO ₂ laser, gas laser, YAG laser, YVO 4 laser, and semiconductor laser. The wavelength of the laser is particularly irreversible in ultraviolet to infrared (10 nm to 10.6 μm). The recording layer 36 (second recording layer) has a wavelength at which it is easy to react. In this embodiment, 1064 nm is used.

  Next, referring to FIGS. 2A to 2C, the first and second images are applied to the card having the two-layer structure including the first recording layer and the second recording layer. A recording method will be described.

  In the card manufacturing method according to the present embodiment, after the first step of laminating and arranging the first recording layer as described above on the second recording layer, the first and second layers laminated in the first step are arranged. A second recording layer that records the second image including a common image between a plurality of predetermined cards by irradiating laser light onto the second recording layer via one recording layer in a non-rewritable manner; The first recording layer on the second recording layer on which the second image is recorded in the step and the second step, the image including different images between the plurality of cards by heat And a third step of recording the first image in a rewritable manner.

  However, as shown in FIG. 2 (A), the card surface 12a, which is one side of the card 10, is an image on the face of a card, such as characters, symbols, figures, or patterns that are to be rewritten as needed, that is, for example, characters 16, which are variable information, The visible information consisting of the face photograph 18 is recorded on the reversible information recording layer 34 as the first recording layer by the thermal head 38 like the first image 40 such as characters and figures, and then rewritten. As shown in FIG. 2 (B), an image on the face of a ticket such as a character, symbol, figure, or pattern that is impossible to make, that is, visible information made up of, for example, fixed information such as a character 14 and a watermark / logo 20 By irradiating the irreversible information recording layer 36, which is the second recording layer, with a laser beam 42, it is possible to record as a second image 44 such as a character, a water mark, or a logo. A.

  Then, for example, when there is an image such as a character, symbol, figure, or picture that is to be rewritten as needed due to employee transfer or retirement, as shown in FIG. 2C, the reversible information that is the first recording layer. For example, after the first image 40 such as characters / graphics is erased from the recording layer 34 by the ceramic heater 46, characters, symbols, graphics, patterns, etc. are recorded by the thermal head 38 in the same manner as in FIG. By recording the first image 40, the image on the card can be updated and reused.

  Conventionally, in order to record fixed information as visible ticket surface information, it has been necessary to process the variable visual information in the pre-printing step of the card before recording variable information. The fixed information can be recorded on the second recording layer through the first recording layer without being rewritable even after the variable information is recorded, so that the images are fixed as non-common images among the plurality of cards. There is an advantage that visible information can be added and corrected. This makes it possible to record fixed information that is not to be rewritten in accordance with the addition or correction of electronic recording information on an IC or a card with a magnetic stripe at any time as visible card surface information. As a visible information record, it is possible to change the cardholder's address, the last name by marriage, and add fixed information required by the card issuer. An economic effect of extending the period of use without reissuing or replacing the expensive IC card itself accompanying the change of the fixed information can be obtained.

  In addition, since the first recording layer and the second recording layer are held by superposing the two recording layers in the first step, the first and second recording layers are retained. Each of these can be written twice without being affected by each other. Therefore, the second recording layer has an image common to the plurality of cards that is not intended to be rewritten, that is, a frame, a dividing line, a watermark, or an icon for writing characters and symbols as fixed information. At the same time, different images can be recorded on the second recording layer among a plurality of other predetermined cards.

  In any case, according to the present embodiment, the first image is recorded on the first recording layer regardless of whether the first image is recorded on the first recording layer. The second image can be recorded.

  In general, the visible fixed information on the card includes the issuing company or organization name, name, icon, remarks, contact information, and the like. These pieces of ticket surface information are treated as non-rewritable ticket surface information, and are collectively processed as a common image before the personal information is written on the ticket surface. According to the present embodiment, this common image can be recorded at any time between a plurality of cards. Since the first image and the second image can be substantially visible even if they are overlapped, the information on both sides of the visible sheet is superimposed on the first recording layer and the second recording layer, respectively. Thus, it is possible to perform overwriting of non-rewritable fixed information common to a plurality of cards and variable information that is frequently rewritten. For example, if a face photograph as personal information is recorded in the second recording layer, and an affiliation destination such as a company is recorded in the first recording layer, a new assignment destination can be updated and recorded each time the assignment destination changes.

  In addition, personal photos such as face photos and full names are recorded on the reversible information recording layer as employee IDs of temporary employees and business travelers, and images such as special characters, symbols, figures or designs are recorded on the lower layer. Recording on the layer with laser light has the effect of preventing forgery and alteration of the card itself and obtaining authenticity. Furthermore, by recording a machine-readable encoded image such as a barcode on the second recording layer, it can be used as an ID card for entrance / exit and attendance management.

  As another application example, the Suica (registered trademark of East Japan Railway Company) card uses the reversible information recording layer, which is the first recording layer, for the variation information such as the usage period and the valid period, An image that is not desired to be rewritten, such as an appendage of a contract or a clause, may be written to the irreversible information recording layer, which is the second recording layer, with a laser beam as needed.

  The layer constituting the card surface 12b may also be configured as a reversible information recording layer that is the first recording layer, and the variation information such as the characters 24 and the barcode 28 may be rewritten.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.

  FIG. 3 is a diagram illustrating a configuration of a card according to the second embodiment. That is, the card according to the present embodiment is obtained by further adding the card base material 48 to the card having the two-layer structure described in the first embodiment. That is, the card according to the present embodiment includes the reversible information recording layer 34 that is the first recording layer, the irreversible information recording layer 36 that is the second recording layer, and the card substrate 48. .

  Also in the present embodiment, as shown in FIG. 4A, after the first image 40 is recorded on the reversible information recording layer 34, which is the first recording layer, by the thermal head 38, FIG. ), The second image 44 can be recorded by irradiating the irreversible information recording layer 36, which is the second recording layer, with a laser beam 42. Then, as shown in FIG. 4C, the first image 40 is once erased by the ceramic heater 46 with respect to the reversible information recording layer 34 which is the first recording layer, and then as shown in FIG. Similarly, by recording the first image 40 with the thermal head 38, the image on the card can be updated and reused.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.

  FIG. 5A is a diagram illustrating a configuration of a card according to the third embodiment. That is, in the card according to the present embodiment, the reversible information recording layers 34a and 34b that are the first recording layers and the irreversible information recording layers 36a and 36b that are the second recording layers are provided on the card base 48. On the other hand, the card has a double-sided structure laminated on both sides.

  Also in this embodiment, as shown in FIG. 6A, after the first image 40 is recorded by the thermal head 38 on the reversible information recording layer 34a and / or 34b as the first recording layer, As shown in FIG. 6B, the second image 44 can be recorded by irradiating the irreversible information recording layer 36a and / or 36b as the second recording layer with a laser beam 42. Then, as shown in FIG. 6C, the first image 40 is once erased by the ceramic heater 46 with respect to the reversible information recording layer 34a and / or 34b, which is the first recording layer, and then FIG. Similarly to (A), the first image 40 is recorded by the thermal head 38, whereby the image on the card can be updated and reused.

  In this card configuration, it is possible not to have one of the reversible information recording layers 34a and 34b.

  If the magnetic stripe 26 is incorporated into the card surface 12b as shown in FIG. 1B, magnetic recording can be performed using the magnetic head 50 as shown in FIG. 6D. When the magnetic stripe 26 is incorporated into the card surface 12b (or card surface 12a) as described above, or as shown in FIG. 5B, the magnetic stripe 26 and the IC chip with respect to the card surface 12b (or card surface 12a). In the case of a hybrid card in which the IC contact 30a and the IC chip 30b and the antenna 32 are incorporated in the inner layer of the card, when the recording condition is appropriately set, the second recording layer is recorded by irradiating the laser beam. The physical influence can be prevented as much as possible.

  In addition, if an encoded image such as a barcode 28 is recorded on the second recording layer by laser light irradiation as shown in FIG. 1B, forgery is prevented, and heat recording is performed on the first recording layer. If done, it can be used for temporary management.

  Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications and applications are naturally possible within the scope of the gist of the present invention.

  For example, the first recording layer and the second recording layer need not always be provided on the entire surface of the card. For example, the reversible information recording area 54 and the area 56 of the card having the card base 52 in the inner layer shown in FIG. 5C can be partially provided as a rewrite area using a leuco dye, A protective layer 58 is provided thereunder, an irreversible information recording layer 36-1 that can be visually recognized by a conventional printing method is provided thereunder, and an irreversible information recording layer 36-2 formed by laser light irradiation is further provided thereunder. If provided, the visible information can be superimposed and recorded even if the area is partially provided only in a predetermined area of the card.

(Appendix)
The invention having the following configuration can be extracted from the specific embodiment.

(1) a first recording layer in which a first image such as a character, a symbol, a figure, or a pattern is recorded so as to be rewritable by heat;
A second image, which is disposed under the first recording layer and recorded in a non-rewritable manner by irradiation with a laser beam, such as characters, symbols, figures or designs that are substantially different from the first image. Recording layer of
Comprising
A card configured such that both the first image and the second image are visible from above the first recording layer;
The card, wherein the first image includes different images between a plurality of predetermined cards, and the second image includes an image common to the plurality of cards.

  This structure corresponds to FIGS. 1E to 2C.

  According to the card described in (1), an optimum recording method of a rewritable image and a non-rewritable image recorded on the card, that is, a recording method using heat and a recording method using laser light irradiation, respectively. Although applied, the recording layers of these images are stacked, so there is no restriction on the layout of each image, and the first image and the second image are substantially different. Therefore, the range of use is not limited. In addition, the first image includes images that are different from each other among the predetermined cards, and the second image includes an image that is common to the plurality of cards. Therefore, the first image may change frequently. It is possible to provide a card that is particularly suitable when both the first image and the second image that causes inconvenience if rewritten are recorded on the same card.

  (2) The card according to (1), wherein a base material layer as a card base material is further disposed under the second recording layer.

  This configuration corresponds to FIGS. 3 to 4C.

  According to the card described in (2), in addition to the effect of (1), a base material layer as a card base material is further disposed under the second recording layer. Strength can be improved.

  (3) The card according to (1), wherein the second recording layer also serves as a base material layer as a card base material.

  This structure corresponds to FIGS. 1E to 2C.

  According to the card described in (3), in addition to the effect of (1), the second recording layer also serves as a base material layer as a card base material, so that the thickness can be particularly reduced.

  (4) The second recording layer is configured such that the second image can be additionally recorded by laser beam irradiation through the first recording layer. Card.

  This configuration corresponds to FIGS. 2B, 4B, and 6B.

  According to the card described in (4), in addition to the effect of (1), the second image is additionally recorded on the second recording layer by laser light irradiation through the first recording layer. Since it is possible to add information that cannot be rewritten to dirt, oil, subtle irregularities, and warping on the surface of the card after completion of the card, the usage range and period of the card is further expanded.

  (5) The first image and the second image each include a readable image that can be read visually or an encoded image that can be read by a machine. card.

  This configuration corresponds to FIG.

  According to the card described in (5), in addition to the effect of (1), the first image and the second image can be read by a visually readable image or a machine, respectively. Since an encoded image such as a bar code is included, the usage range of the card is further expanded, and when an encoded image such as a bar code is included, it is particularly easy to connect with a computer network.

(6) A first recording layer in which a first image such as a character, a symbol, a figure, or a picture is recorded so as to be rewritable by heat, and is disposed below the first recording layer (see FIG. 1E). And a second recording layer in which a second image such as a character, symbol, figure, or pattern that is substantially different from the first image is recorded so as not to be rewritable by laser light irradiation, and A method of manufacturing a card configured such that both the first image and the second image are visible from above the first recording layer,
A first step of stacking and arranging the first recording layer on the second recording layer;
The second recording layer includes images common to a plurality of predetermined cards by irradiating the second recording layer with the laser beam through the first recording layer arranged in a stack in the first step. A second step of recording the image in a non-rewritable manner,
The first recording layer including images different from each other between the plurality of cards by heat with respect to the first recording layer on the second recording layer on which the second image is recorded in the second step. A third step of recording the image in a rewritable manner;
A method for manufacturing a card, comprising:

  This configuration is shown in FIGS. 1A to 1D, 2A to 2C, 4A to 4C, 5B, and 6A to 6D. Corresponding.

  According to the card manufacturing method described in (6), an optimum recording method using heat and a recording method using laser light irradiation are applied to a rewritable image and a non-rewritable image recorded on the card, respectively. Even though the recording method is applied, since the recording layers of these images are laminated, there is no restriction on the layout of each image, and the first image and the second image are substantially different. Since it is a thing, the utilization range is not limited. In addition, the first image includes images that are different from each other among the predetermined cards, and the second image includes an image that is common to the plurality of cards. Therefore, the first image may change frequently. It is possible to provide a card manufacturing method that is particularly suitable when both the first image and the second image that causes inconvenience if rewritten are recorded on the same card.

  The present invention can be used for the following applications, for example.

・ Health insurance insured ID card, medical examination, medical information card ・ Basic Resident Registration Card ・ Driver's license and various qualifications, commuter pass, commuter pass card ・ Passport and alien registration card・ Employee ID ・ Employee ID ・ Student ID ・ In-building management card ・ Amusement use card ・ Credit card ・ Cash card ・ Debit card ・ Consumer financial card ・ E-money ・ E-ticket ・ Point ・ Members card Multi-purpose / ID / security card with IC records.

(A) And (B) is a figure which shows the one card surface and the other card surface of the card | curd using the magnetic stripe as an example of the card | curd concerning 1st Embodiment of this invention, (C) and (D) are It is a figure which shows one card surface of the card | curd which uses the IC chip as another example of the card | curd concerning 1st Embodiment, and the other card | curd surface, (E) shows the structure of the card | curd concerning 1st Embodiment. It is sectional drawing. (A) And (B) is a figure for demonstrating the card | curd recording method which concerns on 1st Embodiment, respectively, (C) is the 1st image erasing process in the card | curd recording method which concerns on 1st Embodiment. It is a figure for demonstrating. It is sectional drawing which shows the structure of the card | curd which concerns on 2nd Embodiment of this invention. (A) And (B) is a figure for demonstrating the recording method of the card | curd which concerns on 2nd Embodiment, respectively, (C) is the erase | elimination process of the 1st image in the card | curd recording method which concerns on 2nd Embodiment. It is a figure for demonstrating. (A) is a figure which shows the structure of the card | curd which concerns on 3rd Embodiment of this invention, (B) is a figure for demonstrating the hybrid card to which 3rd Embodiment is applied, (C) is a deformation | transformation of this invention. It is sectional drawing which shows the structure of an example. (A) and (B) are diagrams for explaining a card recording method according to the third embodiment, and (C) is a first image erasing process in the card recording method according to the third embodiment. (D) is a figure for demonstrating the magnetic recording process to the magnetic stripe in the recording method of the card | curd concerning 3rd Embodiment.

Explanation of symbols

  10 ... Card, 12a, 12b ... Card surface, 14, 16, 22, 24 ... Character, 18 ... Photo of the face, 20 ... Watermark logo, 26 ... Magnetic stripe, 28 ... Bar code, 30a ... Contact for chip, 30b ... IC chip, 32 ... antenna, 34,34a, 34b ... reversible information recording layer, 36,36a, 36b, 36-1,36-2 ... irreversible information recording layer, 38 ... thermal head, 40 ... first Image, 42 ... Laser light, 44 ... Second image, 46 ... Ceramic heater, 48, 52 ... Card substrate, 50 ... Magnetic head, 54, 56 ... Reversible information recording area, 58 ... Protective layer.

Claims (6)

A first recording layer in which a first image such as a character, a symbol, a figure or a picture is recorded so as to be rewritable by heat;
A second image, which is disposed under the first recording layer and recorded in a non-rewritable manner by laser beam irradiation, such as a second image such as a character, a symbol, a figure, or a pattern that is substantially different from the first image. Recording layer of
Comprising
Both the first image and the second image are configured to be visible from above the first recording layer,
The card, wherein the first image includes different images between a plurality of predetermined cards, and the second image includes an image common to the plurality of cards.   The card according to claim 1, wherein a base material layer as a card base material is further disposed under the second recording layer.   The card according to claim 1, wherein the second recording layer also serves as a base material layer as a card base material.   The card according to claim 1, wherein the second recording layer is configured such that the second image can be additionally recorded by laser light irradiation through the first recording layer.   The card according to claim 1, wherein each of the first image and the second image includes a readable image that can be visually read or a coded image that can be read by a machine. A first recording layer in which a first image such as a character, a symbol, a figure, or a picture is recorded so as to be rewritable by heat, and the first recording layer is disposed under the first recording layer. A second recording layer on which a second image such as a different character, symbol, figure or picture is recorded so as not to be rewritable by laser light irradiation, and the first image and the second image are Both of the card manufacturing methods are configured to be visible from the upper part of the first recording layer,
A first step of stacking the first recording layer on the second recording layer;
The second recording layer includes images common to a plurality of predetermined cards by irradiating the second recording layer with the laser beam through the first recording layer stacked in the first step. A second step of recording the image in a non-rewritable manner,
The first recording layer on the second recording layer on which the second image is recorded in the second step includes images different from each other between the plurality of cards due to heat. A third step of recording the image in a rewritable manner;
A method for manufacturing a card, comprising:

Images