JP3013524U - Optical recording prepaid card - Google Patents

Abstract

(57) [Abstract] [Purpose] An optical recording prepaid card that has a large number of linear recording areas parallel to the recording area of the card substrate and performs recording / reading by scanning the recording areas with a laser beam. (EN) Provided is a highly reliable optical recording prepaid card in which erroneous information is not recorded in a section. A prepaid card in which a plurality of linear recording portions in which information is recorded by selectively condensing a laser beam on a specific portion in advance are formed in parallel with each other in a recording area on a substrate. In the above, the linear recording portion is made of a flat shape memory resin, and a pit shape of a convex shape or a concave shape that is restored by being heated to a transition temperature or higher is memorized in a substantially central portion except both end portions thereof. Is characterized by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an optical recording prepaid card.

[0002]

[Prior art]

 Since the card is generally square, and therefore the recording area is also generally rectangular, a large number of parallel linear recording areas are provided in the recording area, and the laser beam for recording is used for this linear recording. The light is scanned along the part, and after the condensing part reaches the end of the recording track-in, it moves to the next linear recording part.

The same applies to the case of reading recorded information from a card that has been recorded. A laser beam for reading is scanned along a linear recording portion, and recording is performed based on the difference in intensity and phase of the reflected light beam based on the presence or absence of pits. Read the information. The laser beam for reading also reaches the end of the linear recording portion and then moves to the next linear recording portion.

[0004]

[Problems to be solved by the device]

 By the way, at the time of non-operation, it stands still at one of both ends of the linear recording part. If such a stationary state continues for a long time, the recording layer composed of the above thin film will be evaporated or denatured, and erroneous information will be recorded, which will impair the reliability of the recorded information and the automatic tracking of the recording / reading device. This will cause malfunctions of the mechanism and autofocus mechanism.

Therefore, according to the present invention, erroneous information is not recorded at both ends of the linear recording portion during both recording and reading, and the optical recording card has high reliability in the recorded information. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, a plurality of linear recording portions, in which laser light is selectively focused on a specific portion in advance and bits are formed to record information, are formed in a recording area on a substrate. In the prepaid card formed in parallel, the linear recording portion is made of a flat shape memory resin, and a convex shape or a concave shape that is restored by being heated to a transition temperature or higher in substantially the central portion excluding both ends thereof. The feature is that the pit shape of the shape is stored.

In such technical means, the “shape memory resin” means that a pit having a convex shape or a concave shape is formed at a temperature equal to or higher than a transition temperature specified according to the type of resin, and the shape is maintained. Cooling below the transition temperature causes the original pit shape to be restored by heating above the transition temperature even if the pits disappear due to deformation in the cooled state. For example, polynorbornene resin (transfer temperature of about 50 ° C.) and the like can be used.

[0008]

[Action]

 When the laser beam is focused on the pit-shaped recording area, the original convex or concave pit shape is restored when this focused area is heated above the transition temperature, while the laser beam is It does not form a pit even when it is stationary on either side.

[0009]

【Example】

 As shown in FIG. 1 (A), the shape memory resin plate 1 was pressed with a nickel stamper at 120 ° C. to mold both the convex portion and the concave portion, and cooled at room temperature. Among them, the convex portions form a large number of pits 5 having a width of 3 μm and a length of about 6 μm arranged on a number of straight lines which are parallel to each other, and are not provided at both ends 1a (length of 500 μm) of the straight lines. The recesses are grooves having a width of 2.5 μm, a depth of 2 μm, and a pitch of 12 μm on a straight line which is parallel to the pit row and which is alternately arranged with the pit row, and further extends from both ends of the pit row to store the shape memory. It has reached both ends of the resin plate 1.

Next, as shown in FIG. 1B, the pit shape was crushed and disappeared at room temperature. The obtained memorized shape memory resin plate 1 was attached to the base material sheet 2, and the Te-C vapor deposition film 3 was laminated on the surface of the shape memory resin plate 1. Finally, a transparent polycarbonate 4 was laminated on the Te-C vapor deposition film 3 and the whole was punched out into a card shape to obtain an optical recording prepaid card. A sectional view of the obtained optical recording prepaid card is shown in FIG. In the recording area composed of the shape memory resin 1, there are tracking guides composed of a large number of parallel grooves, and the tracking guide reaches both ends 1a of the recording area.

This optical recording prepaid card was recorded by an existing reader / writer. A cross-sectional view of the optical recording prepaid card as recorded is shown in FIG. As can be seen from the figure, the pit 5 is selectively restored at the portion where the laser beam is focused. The same reader / writer was used to read the optical recording prepaid card thus recorded. There was no misinformation, and there was no malfunction of the reader / writer.

[0012]

[Effect of device]

 As described above, according to the present invention, when the laser beam is focused on the pit shape recording area, the focused area is heated to the transition temperature or higher to restore the convex or concave pit shape at hand. On the other hand, no pits are formed even when the laser beam is stationary on either end, so there is no recording of erroneous information due to the laser beam being stationary, and no malfunction of the reader / writer. , The reliability of recorded information is dramatically improved.

[Submission date] February 10, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

【Example】

(A) and (B) a shape memory resin plate 1 as shown by pressing the nickel stamper 120 ° C. shape multiple convex portions in the central portion of the memory resin plate 1 in FIG. 1 (depth 2 [mu] m) pit 10 Was molded and cooled to room temperature. Many pits 10 are arranged in a matrix .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010] Next, as shown in FIG. 1 (C), at room temperature, was abolished crush the pit shape. The obtained memorized shape memory resin plate 1 was attached to the base material sheet 2, and the Te-C vapor deposition film 3 was laminated on the surface of the shape memory resin plate 1. Finally, a transparent polycarbonate 4 was laminated on the Te-C vapor-deposited film 3 and the whole was punched into a card shape to obtain an optical recording prepaid card. A sectional view of the obtained optical recording prepaid card is shown in FIG.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

This optical recording prepaid card was recorded by an existing reader / writer. A cross-sectional view of the optical recording prepaid card as recorded is shown in FIG. As can be seen from the figure, the pit 10 is selectively restored at the portion where the laser beam is focused. The same reader / writer was used to read the optical recording prepaid card thus recorded. Even if the laser beam was stationary at a position other than the array of pits 10, the pits 10 could not be formed, so there was no false information and no malfunction of the reader / writer.

[Brief description of drawings]

FIG. 1A is a cross-sectional view of an optical recording prepaid card manufacturing process, and FIG. 1B is a cross-sectional view of an optical storage prepaid card manufacturing process.

FIG. 2 is a sectional view of an optical recording prepaid card.

FIG. 3 is a sectional view of an optical recording prepaid card after recording.

[Explanation of symbols]

 1 Shape Memory Resin 1a Both Ends of Linear Recording Area 2 Base Material 3 Light Absorbing Layer 4 Protective Layer 5 Pit

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[Procedure amendment]

[Submission date] February 10, 1995

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1A is a shape memory tree of an optical recording prepaid card.
Plan view of pit molding of fat plate, (B) side view of (A)
FIG. (C) is a shape memory resin plate of an optical memory prepaid card.
FIG. 6 is a cross-sectional view of the pit shape of FIG.

FIG. 2 is a sectional view of an optical recording prepaid card.

FIG. 3 is a sectional view of an optical recording prepaid card after recording.

[Explanation of symbols] 1 shape memory resin 2 base material 3 light absorbing layer 4 protective layer 10 bits

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication G06K 19/00

Claims (1)

[Scope of utility model registration request] 1. A plurality of linear recording portions in which information is recorded by previously forming a bit by selectively converging a laser beam on a specific portion is formed in parallel with each other in a recording area on a substrate. In the prepaid card, the linear recording portion is made of a flat shape memory resin, and a pit shape of a convex shape or a concave shape that is restored by being heated to a transition temperature or higher is stored in substantially the central portion except both end portions thereof. An optical recording prepaid card that is characterized by