JP2000335124A - Intaglio plate for printing and printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To receive ink from a recess into a transfer member with a small plate pressure to obtain an excellent accuracy in a printing configuration. SOLUTION: In the printing method, a printing intaglio plate having a liquid level control means for projecting the level of ink 2, filled into the recessed unit 9 of the plate 1, from the surface of the plate is provided, and the level of the ink 2 is projected for applying the ink to a blanket 6. The liquid level control means is a piston construction means comprising a movable bottom part 4a, a connecting member 4b, a pressurized member 4c, and a hollow part 4d, the movable bottom part 4a is raised by pressure from the cavity unit 4d upon receiving the ink 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an etching resist, a conductor pattern, an insulator pattern, and the like used in the production of electronic parts such as circuit boards, liquid crystal display elements, and image forming apparatuses.
The present invention relates to an intaglio plate for offset printing and a printing method used for printing a dielectric pattern, a color filter, an electrode pattern of a thermal head, and the like with high precision and high precision, and particularly relates to an electron emission element of a flat display device among image forming apparatuses The present invention relates to an intaglio plate for offset printing and a printing method that are useful for forming an image.

[0002]

2. Description of the Related Art Conventionally, in manufacturing electronic parts such as circuit boards, liquid crystal display elements, and image forming apparatuses, a printing method represented by screen printing or a photographic method using a photoresist has been used. In general, the former printing method is excellent in cost, but cannot obtain a pattern with higher definition than the latter photographic method. For example, in normal screen printing, the patterning of about 100 μm is the limit.

[0003] For this purpose, several printing techniques other than screen printing have been proposed. For example, JP-A-55-36512 proposes intaglio offset printing (gravure offset printing) instead of screen printing.

Further, for the purpose of high-precision printing, Japanese Patent Application Laid-Open No. 55-65553 proposes an apparatus for spinning a blanket, and Japanese Patent Application Laid-Open No. 60-189446 discloses a high-speed apparatus using a pulse motor. Precision printing has been proposed. Japanese Patent Application Laid-Open No. Sho 62-94341 discloses that a printing blanket cylinder can be idled in a normal or reverse direction when a surface plate is at a predetermined position, so that a thick printing of ink or the like can be performed as necessary. Proposals have been made to do so.

FIG. 6 is a sectional view showing an example of a conventional offset printing method. As shown in FIG. 6A, first, ink 2 is filled in the concave portion 9 of the concave mold 1, and doctoring is performed by the doctor blade 3. Next, as shown in FIG. 6B, when the blanket 6 is rolled while being pressed against the concave mold 1,
This blanket 6 receives the ink 2. Further, if the blanket 6 is rolled on a desired substrate (substrate to be printed) in the same manner as described above, the ink is transferred onto the substrate. Thereby, a desired print pattern corresponding to the concave portion 9 is obtained.

In such a conventional pattern forming method by offset printing, it is difficult to completely fill the recess 9 of the intaglio 1 with the ink 2, and usually, as shown in FIG. The surface of No. 2 is in a concave state. Therefore, in order to allow the blanket 6 to sufficiently receive the ink 2 in the recess 9, it is necessary to apply a large printing pressure. When the printing pressure is increased, the deformation of the blanket 6 is increased. However, when the ink 2 is subsequently transferred to the substrate, the blanket is not deformed in the same manner as when receiving the ink, since the substrate surface is usually flat. Therefore, the printing shape is deformed due to the difference in the amount of rubber deformation of the blanket 6 between the time of ink reception and the time of ink transfer.

Therefore, in the prior art, a coating for reducing the surface energy of the intaglio 1, for example, so that the amount of rubber deformation of the blanket 6 is reduced, that is, the ink 2 is sufficiently received from the recess 9 with a small printing pressure. Processing was performed, and the shape of the concave portion 9 was formed in a cone or a quadrangular pyramid.

[0008]

However, in the case of applying a coating treatment for reducing the surface energy of the intaglio plate, the surface energy is small, so that the ink filling property to the concave portion is deteriorated. There is a problem that a specific ink for expressing various functions cannot be used. In addition, when the shape of the concave portion of the intaglio plate is a cone, a quadrangular pyramid, or the like, it is difficult to obtain a required film thickness and shape profile.

The present invention has been made in view of such problems of the prior art, and accepts ink from a concave portion to a transfer member with a small plate pressure without limiting the shape of the concave portion, surface energy, type of ink, and the like. It is an object of the present invention to provide an intaglio for printing, which is capable of achieving excellent printing shape accuracy, and a printing method using the intaglio.

[0010]

SUMMARY OF THE INVENTION The present invention relates to an intaglio printing plate having a liquid level control means for making the liquid level of the ink filled in the concave portions of the plate protrude from the plate surface. When the transfer member receives the ink filled in the concave portion by using the intaglio printing plate, the liquid level of the ink is made to protrude from the plate surface.

When the intaglio printing plate of the present invention is used, when the ink is received by the transfer member such as a blanket, the liquid level of the ink is made to protrude from the plate surface, so that the deformation of the blanket due to the plate pressure is minimized. In addition, the deformation at the time of reception and the deformation at the time of transfer are substantially equal. Therefore, the deformation of the printing shape due to the deformation of the blanket hardly occurs, and high-precision, high-definition printing is possible.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below.

FIG. 1 is a sectional view of an intaglio plate for offset printing showing one embodiment of the present invention. As shown in FIG. 1A, a concave portion 9 is formed in the intaglio 1, and a movable bottom portion 4 a is provided on a bottom surface of the concave portion 9. This movable bottom 4a
Is connected via a connecting member 4b to a pressed member 4c provided below the connecting member 4b. A gap 4d for controlling the pressure of the member 4c is formed below the member 4c to be pressed, and these members 4a to 4d serve as liquid level control means of a piston structure for raising and lowering the bottom surface of the concave portion 9. Function. First,
As shown in FIG. 1 (a), the ink 2 is filled in the concave portion 9 of the concave mold 1, and doctoring is performed by the doctor blade 3.
At this time, a vacuum is applied in the direction of arrow 5 in the figure to apply a negative pressure to the member 4c to be pressed, and the movable bottom 4a is kept in a lowered state.

Next, as shown in FIG. 1 (b), the blanket (transfer member) 6 is rolled while being pressed against the concave mold 1.
Ink 2 is accepted. At this time, the member 4c to be pressed is pressurized by air in the direction of arrow 7 in the drawing.
Is applied, and the movable bottom 4a is raised, so that the liquid level of the ink 2 protrudes from the plate surface.

Further, if the blanket 7 is rolled while pressing on a desired substrate (substrate to be printed) in the same manner, the ink 2 is transferred onto the substrate. Thereby, a desired print pattern corresponding to the concave portion 9 is obtained on the substrate.

The type of the ink 2 is not particularly limited as long as it has a viscosity that can maintain the pattern shape of the concave portion 9 as it is in a protruding state as shown in FIG.
What is necessary is just to select suitably as needed. Specifically, the viscosity of the ink 2 is preferably about 10,000 to 100,000 CPS.

FIG. 2 is a sectional view of an intaglio plate showing a further embodiment of the present invention. In the example shown in FIG.
The liquid level control means for raising and lowering the bottom surface of the diaphragm 8 includes a diaphragm film 8a provided on the bottom surface of the concave portion 9, a hole 8b provided below the diaphragm film 8a, and a hole 8b.
The gap 8d is used to control the pressure applied to the lower surface of the diaphragm film 8a through the gap b.

As shown in FIG. 2A, when the ink 2 is filled, a negative pressure is applied to the lower surface of the diaphragm film 8a by evacuating in the direction of arrow 5 in FIG. To make the diaphragm film 8a
, That is, the bottom surface of the recess 9 is lowered. Next, as shown in FIG. 1B, when the ink 2 is received on the blanket, a positive pressure is applied to the lower surface of the diaphragm film 8a by performing air pressure in the direction of arrow 7 in the figure. By applying and making this a convex shape,
The liquid level of the ink 2 is made to protrude from the plate surface.

FIG. 3 is a plan view illustrating an offset printing apparatus that can be used in the present invention. In this figure, 101
Is an ink kneading table for developing the ink 107 with the ink roller 104. The kneaded ink 107 is intaglio 105
It is spread upward and scraped with a doctor blade 117 to fill the intaglio 105. In some cases, the ink can be directly discharged onto the intaglio 105 by a dispenser or the like without using the ink kneading roller 104, and then filled with a doctor blade.

Reference numeral 102 denotes a plate surface plate on which the intaglio 105 is fixed. Reference numeral 103 denotes a work surface plate for fixing a substrate 106 which is a printing object, and is fixedly arranged on the main body frame 108.

Two rack gears 109 and 110 are disposed on both sides of the three platens 103 arranged in a line, and the gears 111 and 1 are mounted on the rack gears 109 and 110.
12 is arranged.
The blank cylinder 113 has its axis at the carriages 114 at both ends,
The carriage 114, 115 is moved forward and backward by the crank operation of the crank arm 116 from the lower part of the main body, and the blank cylinder 113 is moved to the intaglio 105, the substrate 10
6 are sequentially rotated and slid.

On the surface of the blank cylinder 113, a rubber blanket 7 is attached. Here, examples of the blanket 7 include nitrile rubber, silicon rubber, fluorine rubber, or nitrile rubber obtained by applying silicon, trifluoroethylene, polyvinylidene fluoride polypropylene, or the like to the surface of the nitrile rubber.

Examples of the substrate 106 include quartz glass, glass having a reduced impurity content such as Na, blue plate glass, a glass substrate obtained by laminating SiO ₂ formed on blue plate glass by sputtering or the like, and ceramics such as alumina. Is mentioned.

The present invention relates to an etching resist, a conductor pattern, an insulator pattern, a dielectric pattern, a color filter, and an electrode pattern of a thermal head used in the production of electronic components such as a circuit board, a liquid crystal display element, and an image forming apparatus. It is useful for printing high precision and high precision. In particular, it is very useful for forming an element electrode pattern of an electron-emitting device of a flat display device among image forming devices.

FIG. 4 is a plan view showing a pair of electrodes of the surface conduction electron-emitting device. In the figure, 201 is an insulating substrate,
202, 203 are device electrodes for obtaining electrical connection, 2
04 is a thin film composed of finely divided electron-emitting materials,
205 is an electron emission unit. 2. Description of the Related Art Conventionally, two types of electron-emitting devices using a thermionic electron-emitting device and a cold cathode electron-emitting device have been known. The cold cathode electron-emitting devices include a field emission type (hereinafter, referred to as “FE type”), a metal / insulating layer / metal type (hereinafter, referred to as “MIM type”), and a surface conduction electron-emitting device. WPDyke &
WWDoran "Field Emission", Advance in Electron Ph
ysics, 8,89 (1956) or CASpindt "Physical Proper
ties of thin-filmfield emission cathodes with moly
bdeniumcones ", J. Appl. Phys., 47, 5248 (1976), etc. CAMead," Op for MIN type
eration of Tunnel-Emission Devices ", J. Appl. Phys., 3
2,646 (1961) and the like are known.

As an example of the surface conduction electron-emitting device, M.
I. Elinson, Radio Eng. Electron Phys., 10, 1290 (1965) and the like.

The surface conduction electron-emitting device emits electrons when a current flows through a small area thin film formed on a substrate in parallel with the film surface. Examples of the surface conduction electron-emitting device include a device using an SnO ₂ thin film by Elinson et al. And a device using an Au thin film [G. Dittmer: Thin SolidFilm.
s, 9,317 (1972)], In ₂ O ₃ / SnO ₂ , thin film [M.Hartwe
ll and CGFonstad: IEEE Trans.ED Conf., 519 (197
5)], and those using a carbon thin film [Hisashi Araki et al .: Vacuum, Vol. 26, No. 1, p. 22 (1983)] and the like have been reported.

As a typical example of these surface conduction electron-emitting devices, the device configuration of M. Hartwell described above is shown in FIG.
Is shown schematically in FIG. In the figure, reference numeral 201 denotes a substrate. 2
Reference numeral 04 denotes a conductive thin film, which is formed of a metal oxide thin film or the like formed by sputtering in an H-shaped pattern, and the electron emission portion 205 is formed by an energization process called energization forming described later. Incidentally, the element electrode interval L in the figure is 0.5 to 1 m.
m and W 'are set to 0.1 mm.

In these surface conduction electron-emitting devices, an electron-emitting portion 205 is generally formed by conducting forming the conductive thin film 204 in advance before emitting electrons. That is, energization forming means applying a direct current voltage or a very slowly increasing voltage to both ends of the conductive thin film 204 and energizing the conductive thin film 204 to locally break, deform or alter the conductive thin film 204, and to obtain an electrically high-resistance state. To form the electron emission portion 205 described above. In the electron emitting portion 205, a crack is generated in a part of the conductive thin film 204, and electrons are emitted from the vicinity of the crack. The surface conduction type electron-emitting device subjected to the energization forming treatment has a conductive thin film 20
By applying a voltage to 4 and causing a current to flow through the device, electrons are emitted from the above-described electron emitting portion 205.

[0030]

The present invention will be described in more detail with reference to the following examples.

Example 1 100 × 100 × 1.8t
In order to form 480 × 480 pairs of electrodes of a surface conduction electron-emitting device on a (mm) blue plate glass, FIG.
Offset printing shown in (b) was performed.

First, 500 μm × 150 μm, depth 8 μm
m, and a movable bottom 4 is formed at the bottom of the recess 9.
a intaglio 1 shown in FIG.
I got The intaglio 1 is set on the offset printing machine (Ector, manufactured by Kobei Co., Ltd.) shown in FIG. 3 and the movable bottom portion 4a is lowered by vacuuming, and the Pt resinate ink (manufactured by NE Chemcat Co., Ltd.) , Viscosity 50,000C
PS) using a doctor blade.

After the filling, the movable bottom portion 4a was raised by pressurizing with air to raise the liquid level of the ink 2 from the plate surface. In this state, the blanket cylinder is rotated while being pressed against the intaglio 1 to receive the Pt resinate ink of the pair of electron-emitting device patterns on the surface of the blanket 6 from the intaglio 1 and further apply the ink from the intaglio 1 to the glass substrate on the printing press. The received ink was transferred and printed on a glass substrate by rotating while pressing the blank cylinder in the same manner as the received operation. The plate pressure (at the time of reception) was 50 μm in the pressing amount, and the printing pressure (at the time of transfer) was 50 μm in the pressing amount.

By the printing of this embodiment, a rectangular electrode shape was reproduced. The angle was 90 ° ± 5 °, and the linearity was ± 0.2 μm or less. Further, no ink remains in the intaglio, and the film thickness distribution after firing is 0.085.
μm ± 0.005 μm.

Example 2 100 × 100 × 1.8t
In order to form a 24 × 24 pair of electrodes of a surface conduction electron-emitting device on a (mm) blue plate glass, FIG.
Offset printing shown in (b) was performed.

First, 500 μm × 150 μm, depth 8 μm
m is formed, and a diaphragm film 8a or the like that can be deformed into a concave / convex shape such that the central portion moves up and down by application of pressure is provided at the bottom of the concave 9 to obtain the intaglio 1 shown in FIG. Was. The intaglio 1 is set on a similar offset printing machine, and the diaphragm film 8 is evacuated.
With the center of a lowered, the recess 9 was filled with the same Pt resinate ink using a doctor blade.

After the filling, the central portion of the diaphragm film 8a was raised by applying pressure with air, so that the liquid level of the ink 2 protruded from the plate surface. In this state, the blanket cylinder is rotated while being pressed against the intaglio 1 to receive the Pt resinate ink of the pair of electron-emitting device patterns on the surface of the blanket 6 from the intaglio 1 and further apply the ink from the intaglio 1 to the glass substrate on the printing press. The received ink was transferred and printed on a glass substrate by rotating while pressing the blank cylinder in the same manner as the received operation. The printing pressure (at the time of acceptance) is 50 μm in the pressing amount, and the printing pressure (at the time of transition) is 50 μm in the pressing amount
m.

The printing of this embodiment reproduced a rectangular electrode shape. The angle was 90 ° ± 5 °, and the linearity was ± 0.2 μm or less. Further, no ink remains in the intaglio, and the film thickness distribution after firing is 0.085.
μm ± 0.007 μm.

Comparative Example 1 100 × 100 × 1.8t
When 24 × 24 pairs of electrodes of a surface conduction electron-emitting device were formed on a (mm) blue plate glass, offset printing was performed as follows using the conventional intaglio 1 shown in FIG.

First, 500 μm × 150 μm, depth 8 μm
m was formed, and the intaglio 1 shown in FIG. 6 was obtained. The intaglio 1 was set in the same offset printing machine, and the bottom of the intaglio was filled with the same Pt resinate ink using a doctor blade. After this filling, the blanket cylinder is rotated while being pressed against the intaglio 1 to receive the Pt resinate ink of a pair of electron-emitting device patterns on the surface of the blanket 6 from the intaglio 1, and further apply the ink from the intaglio 1 to the glass substrate on the printing press. The received ink was transferred and printed on a glass substrate by rotating while pressing the blank cylinder in the same manner as the received operation.

The plate pressure (at the time of reception) is 50 μm in pressing amount.
When the printing pressure (at the time of transition) is set to 50 μm in the pressing amount,
Receiving failure occurred, and the rectangular electrode shape could not be reproduced due to chipping or omission (bubbles). However, almost 100% of the transfer was performed, and no ink remained on the blanket.

Further, the printing pressure (at the time of reception) is 20
In the case where 0 μm and the printing pressure (at the time of transition) were 50 μm in the pressing amount, deformation of the shape occurred at the time of reception, and the rectangular electrode shape could not be reproduced. In particular, the side perpendicular to the printing direction was deformed into a convex curve with respect to the printing direction. However,
Almost 100% of the transfer was done and no ink remained on the blanket. In addition, ink remains in the intaglio, and the film thickness distribution after firing is 0.045 μm ± 0.03 μm.
m.

[0043]

As described above, according to the present invention,
When a transfer member such as a blanket receives ink,
Since the ink surface protrudes from the plate surface, the ink can be received from the concave portion to the transfer member with a small plate pressure, and the deformation of the blanket due to the plate pressure is minimized. The deformations are also substantially equal. Therefore, the deformation of the printing shape due to the deformation of the blanket hardly occurs, and high-precision and high-definition printing can be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of an intaglio showing an embodiment of the present invention.

FIG. 2 is a sectional view of an intaglio showing a further embodiment of the present invention.

FIG. 3 is a plan view showing the offset printing press.

FIG. 4 is a plan view showing a pair of electrodes of the surface conduction electron-emitting device.

FIG. 5 is a plan view schematically showing an element configuration of M. Hartwell.

FIG. 6 is a sectional view showing an example of a conventional offset printing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intaglio 2 Ink 3 Doctor blade 4a Movable bottom part 4b Connecting member 4c Member to be pressed 4d Gap part 5 Suction direction 6 Blanket 7 Pressing direction 8a Diaphragm film 8b Hole 8d Gap part 101 Ink mill 102 Plate plate 103 Work setting Board 104 Ink roller 105 Intaglio 106 Work 107 Ink 108 Body frame 109 Rack gear 110 Rack gear 111 Gear 112 Gear 113 Blanket 114 Carriage 115 Carriage 116 Crank arm 117 Blade 201 Insulating substrate 202 Electrode 203 Electrode 204 Thin film composed of fine particle electron emission material 205 electron emission unit

Continued on the front page. (72) Inventor Kazunari Yonemoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Riko Midorikawa 3-30-2, Shimomaruko, Ota-ku, Tokyo Canon stock In-house F term (reference) 2H113 AA02 BA03 CA17 2H114 AA02 AA08 EA05

Claims (6)

[Claims] An intaglio printing plate having a liquid level control means for causing the liquid level of the ink filled in the concave portion of the plate to protrude from the plate surface. 2. The intaglio plate for printing according to claim 1, wherein the liquid level control means is means for raising and lowering the bottom surface of the concave portion of the plate. 3. The intaglio plate for printing according to claim 2, wherein the liquid level control means is a piston structure means capable of raising a movable bottom part constituting a bottom surface of the concave part by pressurization. 4. The intaglio plate for printing according to claim 2, wherein the liquid level control means has a structure capable of raising the central portion of the diaphragm film constituting the bottom surface of the concave portion by pressing. 5. When using the intaglio printing for printing according to any one of claims 1 to 4, and allowing the transfer member to receive the ink filled in the recess, the liquid level of the ink is higher than the surface of the printing plate. A printing method characterized in that it is projected. 6. When using the intaglio for printing according to any one of claims 2 to 4, and filling the recesses of the intaglio with ink,
When the bottom surface of the concave portion is lowered and the transfer member receives the ink filled in the concave portion, the liquid surface of the ink protrudes from the plate surface by raising the bottom surface of the concave portion. A printing method characterized by causing a printing operation.