JPH03127344A - Production of optical card - Google Patents

Abstract

PURPOSE:To improve the workability and the efficiency of optical card production by accurately positioning a reference hole provided in a guide groove stamper to eliminate the positioning stage. CONSTITUTION:After a guide groove stamper 1 and a transparent base material 4 are provided with reference holes 3 and 5, the stamper 1 and the transparent base material 4 have reference holes fitted to a pin projecting on the stage of a forming device and is attached to the forming device, and a guide groove is formed on the transparent base material 4 in this state. A material sheet 8 of optical cards produced with the transparent base material on which guide grooves are formed has the reference hole fitted to a pin projecting on the stage of a punching machine and is attached to the punching machine and is punched to a card form. Thus, the workability and the efficiency are improved because the process to confirm the position of a positioning hole is unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an optical card on which additional information can be written and read optically. Furthermore, the present invention relates to a method of manufacturing an optical card.

<Prior Art> In recent years, as magnetic cards, which are widely used in many industrial fields, are required to have more functions, optical cards have been proposed as a card medium with a larger storage capacity than magnetic cards. Among them, optical cards that allow additional writing are widely used and are considered promising.

As a recording method for optical cards, methods have been proposed in which writing and reading are performed by rotating the card or optical head using spiral or concentric tracks, but normally straight tracks are used, and straight Writing and reading are performed by reciprocating motion.

In order to reduce the weight of an optical card writing/reading device, which consists of an optical system and a transport system, it is important to simplify the transport system.

Generally, during linear reciprocating motion during writing and reading, movement is performed using the end surface of the optical card as a reference plane.

However, since the edge of the card and the trunk are not necessarily parallel (or perpendicular) and have a certain range of skinny, it is necessary to provide an appropriate correction mechanism on the device side, which makes the device smaller and lighter. hindering. On the other hand, the skew of such a card is within a certain small range (±0.2
If the correction mechanism is limited to 1.5° or less, the above-mentioned correction mechanism becomes unnecessary, and the apparatus can be simplified.

<Problem to be solved by the invention> As stated above, the parallelism between the card edge and the trunk (
It is an important issue to manufacture optical cards with small deviations (skew) from the vertical direction. Figure 6(a) shows
Misalignment between the card edge and the track (skew)
FIG. 6(b) is an example of an optical card with a large deviation (skew) from parallelism between the card end face and the track.

One way to solve this problem is to determine the extraction position by microscopic observation, but this is difficult and
Another method proposed is to provide a hole for positioning and use this as a reference to punch out a card shape, which is inefficient and has not been a practical solution. However, this method does not provide a sufficient solution as to how to make holes for positioning. In other words, it is necessary to perform a step of confirming the position of the positioning hole by microscopic observation of each card, which is also bad in terms of workability and efficiency.

Means for Solving the Problems> The present invention has been made to solve the above problems, that is, after providing a reference hole in a guide groove stamper and a transparent base material, the stamper and the transparent base material was attached to the molding device by fitting the reference hole into a pin protruding from the stage of the molding device, and in this state, a guide groove was formed in the transparent base material, and then the guide groove was formed. The original optical card made using a transparent base material is attached to the punching device by fitting the reference hole into a pin protruding from the stage of the punching device, and punched into a card shape. This is a method for manufacturing an optical card.

<Example> The present invention will be explained in detail below using an example.A guide groove stamper 1 has a track line 2 with a width of 2.5 μm and a length of 80 mm. 2500 lines are formed at 2μm intervals (
(Fig. 1), and a reference hole 3 was provided outside this track line pattern. Its size is 3. ! lJ+v+
, the distance between the two reference holes (distance between the centers of the reference holes) is 105
−． It is 6mm. For the reference hole 3, first determine the exact position of the hole by observing with a microscope, and then use a drill to create the hole. The deviation (skinny angle) between the track line 2 and the track line 2 was 0.05°.

The size and spacing of the reference holes 3 correspond to those of pins protruding from the stage of a forming device and a punching device that will be used later. Therefore, the diameters and intervals of the pins protruding from the stages of the forming device and the punching device are exactly the same. However, the pin diameter values and spacing values are not limited to the above.

Also use a puncher to punch the reference hole 5 into the transparent substrate 1i4 (size 90g+-X 120mm, 0.4mm thick acrylic plate).
has been established. Its size is 3.9 mm in diameter, and the distance between the two reference holes (distance M between the centers of the reference holes) is 105.6 mm.

The transparent substrate 4 has the required optical properties such as light transmittance and birefringence, and has the desired mechanical and thermal properties 1
．． There are no particular limitations on the material as long as it does not cause deformation or deterioration in subsequent steps, and film sheets made of polyvinyl chloride, polycarbonate, polyester, urethane resin, etc. can also be used.

Further, although the size and thickness are not limited to those mentioned above, a size larger than at least the card size (54 mm x 86 mm) is used.

The guide groove stamper 1 and the transparent substrate 4 are attached to the molding apparatus by fitting the respective reference holes 3 and 5 to pins protruding from the stage of the molding apparatus.
), then pressurized to 20Kg for 5 minutes at a temperature of 140'C.
/cm”), then pressurized for 5 minutes under water cooling (20K
g/c 2), a guide groove was formed on the transparent substrate 4. The molding conditions are not limited to the above, but include the material of the transparent substrate 4,
The molding is carried out under conditions such that guide grooves can be accurately formed on the transparent substrate 4 due to the specifications of the molding apparatus.

An optical card original 6 made using a transparent base material 4 on which guide grooves are formed is attached to a punching device by fitting a reference hole 5 to a pin protruding from the stage of the punching device. , punched out into a card shape (Figure 4).

FIG. 5 shows a histogram of the values of the skew angle 11 of 20 optical cards manufactured according to the present invention. As can be seen from FIG. 5, the skew angle distribution of the 20 optical cards is within ±0.2°.

<Effects of the Invention> As described above, according to the present invention, if the reference holes provided in the guide groove stamper are accurately positioned, the conventional process of positioning cards one by one can be eliminated. Therefore, the workability and efficiency of manufacturing optical cards with small skew are greatly improved, and it becomes possible to manufacture optical cards with small skew in large quantities.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams showing the method of manufacturing an optical card according to the present invention in the order of steps, and FIG. 5 is a histogram showing the distribution of skew angles of 20 optical cards manufactured by the final method. , FIG. 6 is an explanatory diagram showing an example of an optical card with a small skew angle and an optical card with a large skew angle. 1: Guide groove stamper 2 Ni rack line 3: Reference hole 4: Transparent substrate 5: Reference hole 6: Optical card original 7: Optical card 8 Ni rack line 9: Optical card 10: L-rack line 11: Skinny angle Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) After providing a reference hole in the guide groove stamper and the transparent base material, the stamper and the transparent base material are inserted into the molding device by fitting the reference holes into pins protruding from the stage of the molding device. In this state, guide grooves are formed on the transparent base material, and then the original optical card made using the transparent base material on which the guide grooves are formed is projected onto the stage of a punching device. 1. A method for manufacturing an optical card, characterized in that the reference hole is fitted to a pin in the optical card, the card is attached to a punching device, and the card is punched out into a card shape.