JPS62198825A - Liquid crystal display panel - Google Patents

Abstract

PURPOSE:To reduce the manhours for production and to improve the grade of a display by controlling the spacing between upper and lower substrates with the intersection of striped projecting parts formed on substrate surfaces. CONSTITUTION:Resist films 15 are formed on the substrates 11, 12 and are patterned to striped resist films 16 by an exposing mask. The exposed parts of the substrates 11, 12 are etched 2.0-2.0mu with the resist films 16 as a mask to form striped projecting parts 13 having 10theta width on the substrate surfaces. After ITO films are formed by a puttering method on the substrate surfaces, the resist films 16 are removed by a solvent, then the ITO films on the resist films 16 are lifted off and the stripped ITO electrodes 14 and the striped projecting parts 13 having 10mu width and 1.5-1.6mu height between the electrodes are formed. An orientation treatment is executed and the upper and lower substrates 11 and 12 are superposed. The upper and lower substrates 11, 12 are adhered while the upper and lower substrates 11, 12 are pressurized until the intersected points of the striped projecting pats 13 contact each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display panel, and more particularly to a structure of a liquid crystal display panel in which a spacer material defining a gap between upper and lower substrates of the liquid crystal display panel is improved.

[Conventional technology]

As the application fields of liquid crystal display panels expand, the response time of liquid crystal display devices is shortened, the data lag of applied voltage pulses due to the increase in the amount of information in the panel, and the steepness of translucency relative to applied voltage is increased. Therefore, it is required to make the gap between the substrates of the liquid crystal display panel uniform and thin.

The structure of conventional liquid crystal display panels is such that spacer materials made of glass particles are dispersed inside the sealant and liquid crystal layer.
It forms the gap between the substrates of the liquid crystal display panel. That is,
As shown in Figure 3 (main parts are shown enlarged for convenience of explanation)
A sealing material (not shown) in which glass particles are dispersed as a spacer material is printed on the periphery of the upper substrate 1 on which the striped electrodes 4 and an alignment film (not shown) are formed, and a spacer material of glass particles is printed on the lower substrate 2. Distribute 3. After that, the upper substrate 1 is placed on the lower substrate 2, and pressure is applied to separate the upper and lower substrates 1.

2 and inject liquid crystal material inside to form a liquid crystal layer.
A liquid crystal display panel is created by sealing the holes with epoxy resin.

[Problem that the invention seeks to solve]

In the structure of such a conventional liquid crystal display panel, fiber glass is crushed and classified and then classified onto a substrate. Due to the manufacturing method, if the fiber glass diameter is set to 4 μm or less, it becomes expensive. In addition, when the gap between the upper and lower substrates is set to 1 to 3μ, classification of spacer materials with a diameter of 1 to 3μ, which is sensitive to static electricity generated on the substrate, tends to cause uneven dispersion and overlap between the spacer materials. There were drawbacks such as unevenness in the gaps between the two.

Therefore, conventional liquid crystal display panels have problems such as being expensive, requiring a large number of man-hours, and reducing display quality.

The purpose of the present invention is to solve the above-mentioned problems, to eliminate uneven classification of spacer material, to easily control the upper and lower electric gaps, to be thinner than 3 μm, and to provide accurate patterning of display electrodes. The object of the present invention is to provide a liquid crystal display panel that is well-made, reduces manufacturing man-hours, and improves display quality.

[Means for solving problems]

In the liquid crystal display panel of the present invention, as a method of setting the gap thickness that defines the gap between the upper and lower substrates, stripe-like protrusions are formed on the substrate surface, and when the upper and lower substrates are stacked, the stripe-like protrusions intersect. The gap between the intersection points of the protrusions formed by the above-mentioned projections has the same gap thickness as that of the upper and lower substrates, and is electrically connected.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic cross-sectional view showing the structure of a liquid crystal display panel according to an embodiment of the present invention, and FIG.
FIG. 1 is a Chinese-style sectional view shown in order of steps to explain the manufacturing method of the embodiment shown in FIG.

First, as shown in FIG. 2 [al], 1.5±0.1μ of AZ-13007 otoresist manufactured by Shipley Co., Ltd. was coated on the substrate 11.12 by a roll coater method, and then baked to form a fix S. form.

Next, as shown in FIG. 2(b), an exposure mask prepared so as to form a striped resist film 16 with a width of 10 μm is prepared, and after contact exposure of the resist film 15 on the substrates 11 and 12, the same (The striped resist film 16 is patterned using an AZ-Developer manufactured by Hipley Co., Ltd.).

Next, as shown in FIG.
: Etch the exposed parts of the substrate 11 and 12 by 2.0 to 2.1μ with an aqueous solution diluted to 50 to 100% to form a 11
A striped convex portion 13 of 1 g and 10 μm is formed.

Furthermore, as shown in Figure (d) K, i<1, this substrate surface 11
．． 500 tin-containing indium oxide (ITO) film on 12
When the resist film 16 is removed with a solvent after being formed by the ~soo&sputter method, the 1'vO film on the resist film 16 is lifted off, forming a striped I as shown in FIG. 2(e).
There is a width of 10μ and a height of 1 between the T O' 4 poles 14 and this electrode.
．． Striped convex portions 13 having a diameter of 5 to 1.6 μm can be formed.

The surfaces of the upper substrate 11 and the upper substrate 12 formed in this way are subjected to an orientation treatment, and an epoxy resin, for example, is applied as a sealing material to the surface of one of the substrates in a specified size frame by screen printing, and then the upper and lower substrates are 11 and 12 are placed one on top of the other, and the upper and lower substrates 11.12 are heat-treated while being pressed until the intersection points of the striped convex portions 13 on the inner surfaces of the upper and lower substrates 11.12 come into contact with each other to harden the epoxy resin and bond the upper and lower substrates 11.12 together. Next, by injecting liquid crystal and sealing with epoxy resin in the same manner as in the conventional method, a liquid crystal display panel according to an embodiment of the present invention having a gap between display electrodes of 3 μm can be manufactured.

〔Effect of the invention〕

As explained above, according to the present invention, the gap between the upper and lower electrodes to be set can be defined by the intersection of the striped protrusions formed on the substrate surface, so there is no uneven distribution of the spacer material, and the gap between the upper and lower electrodes can be easily controlled. Moreover, it can be made thinner than 3 μm, and at the same time, the display electrodes can be patterned with high precision, so that the number of manufacturing steps can be reduced and the display quality can be improved.

Therefore, since the display electrode gap can be made thinner, the response speed becomes faster, the duty-up becomes oT+ihi, and
"Ferroelectric liquid crystal" which requires a display electrode gap of 3μ or less
A liquid crystal display panel can also be manufactured without any problem, and has the effect of being able to manufacture a liquid crystal display panel with excellent optical properties at low cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIGS. 2(a) to (
e) is a cross-sectional view of a liquid crystal display panel shown in the order of steps to explain the manufacturing method of an embodiment of the present invention, and FIG. 3 is a cross-sectional view of a conventional liquid crystal display panel. 1...Lower board, 2...Lower board, 3...
... Spacer material, 4 ... Striped electrode, 11 ... Upper substrate, 12 ... Lower substrate,
13... Striped convex portion according to the present invention, 14
・・・・・・Striped ITO electrode. 15... Resist film, 16... Striped resist film. Figure 277 104th Reiman Figure 2

Claims (1)

[Claims] striped transparent electrodes are provided on the inner surfaces of the opposing upper and lower substrates, and a spacer is interposed between the upper and lower substrates;
In a liquid crystal display panel in which liquid crystal is injected into a gap formed by bonding the peripheral parts of the upper and lower substrates with a sealing material, striped convex portions are formed on the substrate surfaces of the upper and lower substrates, and the upper and lower substrates are overlapped. A liquid crystal display panel characterized in that a gap between the intersection points of the striped protrusions that are formed by intersecting each other has a gap thickness between the upper and lower substrates.