Thick indium tin oxide (ITO) conductive film of liquid crystal handwriting board

Abstract

The utility model belongs to the technical field of liquid crystal display equipment, and particularly relates to a thick indium tin oxide (ITO) conducting film of a liquid crystal handwriting board. The buffer layer is arranged on the surface of the substrate layer; a conductive layer; the conductive layer is arranged on the surface of the buffer layer; the protective layer is arranged on the surface of the conductive layer; and the monomolecular layer is arranged on the surface of the protective layer. The substrate layer is made of polyimide (PI) or polyphenylene sulfide (PPS), and the moderate thickness range (50-200 microns) of the substrate layer is combined, so that excellent mechanical strength and chemical stability are provided; the design effectively solves the problem that a traditional ITO conducting film is prone to damage when facing physical pressure and environmental challenges, especially under variable environmental conditions such as temperature fluctuation and chemical corrosion, and therefore the long-term stability and functionality of the substrate layer are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal display equipment, and in particular relates to a thick ITO conductive film of a liquid crystal handwriting board. Background Art

[0002] In existing liquid crystal display technology, ITO (indium tin oxide) conductive film is widely used in the manufacture of touch screens and displays due to its excellent transparency and good electrical conductivity. However, due to the inherent brittleness of ITO materials, it is prone to cracks or breakage when subjected to physical shock or temperature changes, which limits its application in flexible or bendable devices.

[0003] In addition, conventional ITO conductive films are usually composed of only a single or a few layers, which makes them less resistant to mechanical stress or chemical attack. In actual use, these conductive films are susceptible to scratches and other physical damage, as well as performance degradation caused by environmental factors such as humidity and exposure to chemicals. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a thick ITO conductive film for a liquid crystal handwriting board, which can not only provide the necessary conductivity and transparency, but also enhance its mechanical stability and environmental tolerance.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A thick ITO conductive film for a liquid crystal handwriting tablet, comprising a base layer;

[0007] A buffer layer, the buffer layer being arranged on the surface of the base layer;

[0008] A conductive layer; the conductive layer is arranged on the surface of the buffer layer;

[0009] A protective layer, the protective layer being arranged on the surface of the conductive layer;

[0010] A monomolecular layer is disposed on the surface of the protective layer.

[0011] Furthermore, the base layer is polyimide PI or polyphenylene sulfide PPS; and the thickness of the base layer is between 50 and 200 microns.

[0012] Furthermore, the buffer layer is an inorganic-organic hybrid material or a nanocomposite material, and the thickness of the buffer layer is between 3 microns and 30 microns.

[0013] Furthermore, the conductive layer is ITO (indium tin oxide), and the thickness of the conductive layer is between 25 nanometers and 180 nanometers.

[0014] Furthermore, the protective layer is polyvinyl alcohol (PVA) or polyurethane (PU), and the thickness of the protective layer is between 20 microns and 300 microns.

[0015] Furthermore, the monomolecular layer is a silane compound or an alkylthiol.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] First, the use of polyimide PI or polyphenylene sulfide PPS as the material of the substrate layer, combined with its moderate thickness range (50 to 200 microns), provides excellent mechanical strength and chemical stability. This design effectively addresses the problem that traditional ITO conductive films are easily damaged when facing physical pressure and environmental challenges, especially under variable environmental conditions such as temperature fluctuations and chemical corrosion, thereby ensuring the long-term stability and functionality of the substrate layer.

[0018] Secondly, the buffer layer is composed of inorganic-organic hybrid materials or nanocomposites and has a suitable thickness of 3 to 30 microns, which enables the buffer layer to not only provide sufficient mechanical support but also maintain good elasticity, effectively buffering the internal stress between the substrate layer and the conductive layer caused by thermal expansion or contraction. The introduction of this structure reduces the risk of brittle fracture of the ITO film due to stress concentration and solves the common problem of conductive film rupture in high-performance applications.

[0019] The conductive layer is designed with indium tin oxide (ITO) and its thickness is optimized (between 25 nanometers and 180 nanometers), which not only ensures high transparency and good conductivity, but also improves the crack resistance of the conductive layer. The optimization of this layer directly responds to the limitations of ITO conductive film that is susceptible to physical influences in practical applications, and enhances the reliability and user experience of the LCD handwriting tablet.

[0020] The introduction of the protective layer further enhances the stability and durability of the entire structure. By using polyvinyl alcohol (PVA) or polyurethane (PU) and adjusting its thickness between 20 microns and 300 microns, it not only provides a solid physical protective barrier for the conductive layer to prevent chemical corrosion and physical damage, but also enhances the flexibility and scratch resistance of the surface. The design of this layer fully responds to the negative impact of the external environment on the ITO layer, improving the overall durability and maintenance convenience of the device.

[0021] Finally, the application of the monolayer forms a strong chemical bonding layer on the surface of the protective layer, which not only effectively isolates external pollution and chemical corrosion, but also provides additional waterproof and oil-proof properties. The addition of this layer significantly improves the service life and stability of the LCD handwriting tablet in complex environments, thereby achieving a high-performance, long-term reliable LCD display solution that meets the market demand for high-quality touch screens. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Base layer; 2. Buffer layer; 3. Conductive layer; 4. Protective layer; 5. Monolayer. DETAILED DESCRIPTION

[0025] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0026] See also Figure 1 A thick ITO conductive film for a liquid crystal handwriting tablet includes a base layer 1; a buffer layer 2, the buffer layer 2 is arranged on the surface of the base layer 1; a conductive layer 3; the conductive layer 3 is arranged on the surface of the buffer layer 2; a protective layer 4, the protective layer 4 is arranged on the surface of the conductive layer 3; a monomolecular layer 5, the monomolecular layer 5 is arranged on the surface of the protective layer 4; this structural design fully considers the physical pressure and environmental challenges that the liquid crystal handwriting tablet may encounter in daily use, and enhances the durability and stability of the overall structure through the specific functions of each layer.

[0027] See also Figure 1 , the base layer 1 is polyimide PI or polyphenylene sulfide PPS; and the thickness of the base layer 1 is between 50 and 200 microns; polyimide PI provides the base layer 1 with excellent mechanical strength and chemical corrosion resistance, while polyphenylene sulfide PPS increases the tolerance to high temperature, so that the base layer 1 can maintain stability and functionality in different environments.

[0028] See also Figure 1 The buffer layer 2 is an inorganic-organic hybrid material or a nanocomposite material, and the thickness of the buffer layer 2 is between 3 microns and 30 microns; the inorganic-organic hybrid material provides sufficient mechanical support while maintaining good elasticity to cope with the thermal expansion or contraction difference between the base layer and the conductive layer; the nanocomposite material enhances the structural integrity of the buffer layer 2 by adding its nanoscale filler, and effectively disperses the pressure caused by external impact.

[0029] See also Figure 1The conductive layer 3 is ITO indium tin oxide, and the thickness of the conductive layer 3 is between 25 nanometers and 180 nanometers; the indium tin oxide conductive layer 3 not only provides the necessary conductivity and high transparency, suitable for touch screen applications, but also the optimization of thickness ensures that while maintaining high conductivity, it also has sufficient crack resistance to adapt to a wider range of application needs.

[0030] See also Figure 1 The protective layer 4 is polyvinyl alcohol PVA or polyurethane PU; and the thickness of the protective layer 4 is between 20 microns and 300 microns; polyvinyl alcohol PVA provides a solid layer of protection to resist chemical erosion and physical damage, and polyurethane PU increases the flexibility of the surface, improves the anti-scratch and anti-wear properties, and ensures the long-term stable operation of the conductive layer 3.

[0031] See also Figure 1 , the monomolecular layer 5 is a silane compound or an alkylthiol; the silane compound or the alkylthiol forms a strong chemical bonding layer on the surface of the protective layer 4, which effectively isolates the pollution of the external environment and the erosion of chemical substances, while providing additional waterproof and oil-proof properties, thereby enhancing the environmental adaptability and service life of the entire structure.

[0032] The working principle of the utility model is:

[0033] The base layer 1 is provided so that the base layer 1 serves as a supporting base for the entire structure, providing good flexibility and mechanical stability; the buffer layer 2 is provided and located between the ITO film and the base layer to reduce internal stress, buffer the thermal expansion difference and mechanical stress between the ITO film and the base layer, thereby reducing the risk of brittle cracking of the ITO layer;

[0034] By setting the protective layer 4, the protective layer 4 covers the ITO layer to protect the ITO from external physical damage and chemical corrosion, while maintaining the transparency of the overall structure;

[0035] By providing the monomolecular layer 5, a molecular film is formed on the surface of the protective layer, thereby improving the anti-scratch ability and anti-pollution performance, and reducing the influence of the external environment on the ITO layer.

[0036] This can enhance its overall flexibility and durability.

[0037] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A thick ITO conductive film for a liquid crystal writing tablet, characterized in that: It includes the basal layer (1); A buffer layer (2), wherein the buffer layer (2) is arranged on the surface of the base layer (1); A conductive layer (3); the conductive layer (3) is arranged on the surface of the buffer layer (2); A protective layer (4), wherein the protective layer (4) is arranged on the surface of the conductive layer (3); A monomolecular layer (5), wherein the monomolecular layer (5) is arranged on the surface of the protective layer (4).

2. The thick ITO conductive film of a liquid crystal writing board according to claim 1, characterized in that: The base layer (1) is polyimide PI or polyphenylene sulfide PPS; and the thickness of the base layer (1) is between 50 and 200 micrometers.

3. The thick ITO conductive film of a liquid crystal writing board according to claim 1, characterized in that: The buffer layer (2) is an inorganic-organic hybrid material or a nanocomposite material, and the thickness of the buffer layer (2) is between 3 microns and 30 microns.

4. The thick ITO conductive film of a liquid crystal writing board according to claim 1, characterized in that: The conductive layer (3) is indium tin oxide (ITO), and the thickness of the conductive layer (3) is between 25 nanometers and 180 nanometers.

5. The thick ITO conductive film of a liquid crystal writing board according to claim 1, characterized in that: The protective layer (4) is polyvinyl alcohol (PVA) or polyurethane (PU); and the thickness of the protective layer (4) is between 20 micrometers and 300 micrometers.

6. The thick ITO conductive film of a liquid crystal writing board according to claim 1, characterized in that: The monomolecular layer (5) is a silane compound or an alkylthiol.

Images