JPH09105921A - Integrated information recording medium using patterning electrode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely and simply take-out electrode of an integrated information recording medium by integrally forming take-out electrodes of respective electrode layers of the integrated information recording medium by collecting them to the same side and taking out electrode by superposing a flexible printed circuit board printed with the wiring and electrode contacts corresponding to respective electrode take-out areas upon the integrated information recording medium. SOLUTION: The patterning electrodes 41 are printed and formed on the flexible printed circuit board 40, and further, notched parts 40a corresponding to three transmissivity monitor areas are formed on the board 40 to become windows when the transmissivity is monitored. The terminals 41a-41c of the patterning electrodes 41 are contact parts connected to upper part electrode take-out terminals 30 of R, G, B, and the terminal 41d is the contact part connected to a lower part electrode terminal 31, and the terminal 41e is the contact part connected to a current value monitor area 34. Further, since the transmissivity monitor areas are formed integrally with respective R, G, B electrodes, they are shared with the terminals 41a-41c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated information recording medium in which an optical sensor and a liquid crystal recording medium are laminated and an image is recorded by changing the orientation of the liquid crystal recording medium, and more particularly to electrode extraction of the recording medium. is there.

[0002]

2. Description of the Related Art Conventionally, in a liquid crystal recording medium in which a liquid crystal recording medium having a liquid crystal-polymer composite layer formed on an electrode and an optical sensor having a photoconductive layer formed on the electrode layer are laminated and integrated. It is known that an image is recorded by voltage application exposure. FIG. 1 shows such an integrated information recording medium. In the figure, 10 is an optical sensor and 20 is a liquid crystal recording medium. In the optical sensor 10, a transparent electrode 12 and a photoconductive layer 13 are sequentially laminated on a transparent support 11, and a liquid crystal recording medium 20 has a liquid crystal-polymer composite layer 23 on a transparent electrode 22.
Are laminated. The photoconductive layer 13 has a single-layer structure in which trinitrofluorenone is added to polyvinyl carbazole as an organic photoconductive layer, or an azo pigment as a charge generation layer. And the like, and a layer obtained by laminating a material in which a hydrazone derivative is mixed with a resin such as polycarbonate as a charge transfer layer can be used. In the case of the integrated information recording medium, FIG.
As shown in FIG. 1 (a), a liquid crystal recording medium is directly laminated on an optical sensor, as shown in FIG. 1 (b), a transmissive type in which a transparent dielectric intermediate layer 24 is interposed, or an intermediate type. There is a reflection type in which a layer is a dielectric mirror.

As shown in FIG. 2, when a voltage is applied between the electrodes 12 and 22 of such an integral type information recording medium by a power source 30 and visible light is irradiated as writing light, the photoconductive layer is generated according to the exposure intensity. The conductivity of 13 changes, the electric field applied to the liquid crystal-polymer composite layer 23 changes, and the alignment state of the liquid crystal changes, which state is maintained even after the applied voltage is turned off and the electric field is removed. Information is recorded.

[0004]

By the way, the layer thicknesses of the liquid crystal recording medium and the optical sensor are about 6 μm and 10 μm, respectively, and the layer thickness of the entire integrated information recording medium is very thin, less than 20 μm. As described above, the electrode extraction of a very thin liquid crystal recording medium is conventionally performed by pressing an electrode contact with an elastic body, but it is difficult to extract the electrode reliably and easily because the medium is thin and small. For example, it is not possible to cope with the case where the camera is loaded in a camera or the like to enable easy photographing. Further, the number of parts for taking out the electrodes increases and the structure becomes complicated, which is a problem in mass production.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an integrated information recording medium using a patterning electrode that allows reliable and simple electrode extraction of the integrated information recording medium.

[0006]

According to the present invention, the extraction electrodes of the electrode layers of the integrated information recording medium are collectively formed on the same side, and the electrode contacts and the wirings corresponding to the extraction electrode regions are printed. It is characterized in that the flexible printed circuit board is placed on the integrated information recording medium to take out the electrodes. Since the present invention can reliably and easily take out electrodes, the number of parts can be reduced, cost can be reduced, and mass production can be coped with.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a plan view for explaining how to take out electrodes of an integrated recording medium of the present invention. The recording medium used is the same as that described with reference to FIGS. In FIG. 3A, the upper electrode lead-out terminal 30
Is a terminal connected to, for example, each R, G, B electrode of the liquid crystal recording medium, a lower electrode terminal 31 is a terminal connected to an electrode of the photosensor, and these opposing areas form an image recording area 32. Is forming. The transmittance monitor area 33 is an extraction electrode area connected to each of the R, G, and B electrodes, and is for monitoring the transmittance of a dark portion. Further, a current value monitor area 34 is formed at the end of the medium and forms an area for monitoring the current (dark current) in the dark portion.
Then, the upper electrode take-out terminal 30, the lower electrode terminal 31, the transmittance monitor region 33, and the current value monitor region 34.
Are formed so that the electrodes can be taken out from the same side (front side in the figure).

FIG. 3B shows an example of the size of each part of the integrated recording medium. For a medium of 48 mm × 93 mm, the width of each region on the electrode extraction side is a current value monitor region of 4 mm. The transmittance monitor area and the upper electrode take-out area are 10 mm, and the lower electrode take-out area is 5 mm.

FIG. 4 is a view showing a printed circuit board for taking out the electrodes in each area shown in FIG. A patterning electrode 41 is formed by printing on the flexible printed circuit board 40, and three transmittance monitor regions 3 are formed on the substrate 40.
3 (FIG. 3A) is formed with a notch 40a, which serves as a window for monitoring the transmittance. The patterning electrodes 41a to 41c are connected to the R, G, and B upper electrode lead terminals 30, 41d are connected to the lower electrode terminals 31, and 4d.
Reference numerals 1e are contact portions connected to the current value monitor area 34, respectively. Since the transmittance monitor region is formed integrally with each R, G, B electrode, it is also used as the terminals 41a to 41c.

FIG. 5 is an enlarged detailed view of the contact portion of the patterning electrode. As shown in FIGS. 5A and 5B, several bump heads 42 are formed.
As shown in the sectional view of (c), a through hole is formed in a substrate made of a polyimide film having a thickness of 25 μm, an electrode material is poured into this hole, and wiring is patterned on the back surface side. By making contact with the upper electrode of the medium with the bump head 42 and printing the wiring on the back surface side with respect to the contact portion, electric discharge between the medium and the medium is prevented. As shown in the enlarged view of FIG. 5D, the bump head 42 is formed by depositing Au on the surface of an alloy of Ni, Cu, and Ag, and has a height of several μm to several tens μm.

FIG. 6 is a view showing a state in which the patterning electrode is connected to the extraction electrode of the integrated medium. The flexible printed board 40 on which the patterning electrode is formed is
Each bump head is connected to each lead-out electrode of the integrated medium, with the bump heads facing downward on the lead-out electrode region of the integrated medium. In this way, it is possible to reliably and easily take out an electrode for a thin and small medium, reduce the number of parts, reduce the cost, and achieve mass production.

[0012]

As described above, according to the present invention, the electrodes of the integrated information recording medium can be reliably and easily taken out, the number of parts can be reduced, the cost can be reduced, and the mass production can be achieved. Is also possible.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an integrated liquid crystal recording medium.

FIG. 2 is a diagram illustrating an image exposure method for an integrated liquid crystal recording medium.

FIG. 3 is a diagram illustrating medium specifications of the present invention.

FIG. 4 is a diagram illustrating a patterning electrode of the present invention.

FIG. 5 is an enlarged detailed view of electrode contacts.

FIG. 6 is a diagram showing a state in which a patterning electrode is connected to a medium.

[Explanation of symbols]

30 ... Upper electrode take-out terminal, 31 ... Lower electrode terminal, 3
2 ... Image recording area, 33 ... Transmittance monitor area, 34 ... Current value monitor area, 40 ... Flexible printed circuit board, 4
1 ... Patterning electrode, 42 ... Bump head.

Claims (3)

[Claims] 1. A liquid crystal recording medium having a liquid crystal-polymer composite layer laminated on an electrode layer, and an optical sensor having a transparent substrate on which an electrode layer and a photoconductive layer are formed. An integrated information recording medium in which lead-out electrodes of the both electrode layers are formed on the same side, either directly or with an intermediate layer interposed so that the conductive layers face each other, and at least the lead-out electrodes of the both electrode layers are provided. A flexible printed board having electrode contacts and wiring patterns corresponding to the areas is overlapped with the extraction electrode area of the integrated information recording medium to extract the electrodes. Physical information recording medium. 2. The recording medium according to claim 1, wherein an R, G, B electrode contact, a common electrode contact, and a current value monitor area electrode contact are formed on one surface of the flexible printed circuit board, respectively, and on the opposite side. An integrated information recording medium using a patterning electrode, characterized in that wiring is patterned on the surface. 3. The integrated information recording medium using a patterning electrode according to claim 2, wherein the electrode contacts are formed with several bump heads.