Anti-reflective film with water and gas barrier effect
Function and spectrum of Anti-reflective film with water and gas barrier effect
"Anti-reflective film with water and gas barrier effect" uses a barrier film to block the transmission of gas or moisture. It is an effective packaging technology. Through the design of the film stack, it has an anti-reflective effect and can effectively extended the life span of electronic components, flat-panel displays and other products.
Specification of Anti-reflective film with water and gas barrier effect
Water and gas resistance
Principle of Anti-reflective film with water and gas barrier effect
Existing commercially available products (including electronic components, medical equipment, medicines, flat-panel displays, food, etc.) are very sensitive to gas or moisture. If they are exposed to gas or moisture for a long time, performance will deteriorate, the shelf life will shorten or the product will be unacceptable. Therefore, if a material with the characteristic of preventing the passage of gas molecules can be prepared on the substrate, the transmission of gas or moisture can be effectively reduced or almost completely blocked (as shown in Figure 1), and the life of the product can be effectively prolonged.
Figure 1. Schematic diagram of gas barrier
Polymer gas barrier films performance is affected by :
(1) Penetration through holes in the material (Pores)
Dust particles in the air adhere to the substrate or the quality of the film is poor, which is the main source of pinholes in the film. These holes will become the path for water vapor and oxygen to penetrate, which will greatly reduce the gas barrier effect of the film. Therefore, how to prepare a pinhole-free film is the most important.
(2) Permeation directly from the past
The step of gas molecules permeating the substrate can be divided into the gas molecules adsorbing on the surface through absorption, passing through the material through the diffusion mechanism (Diffusion), and finally desorption from the surface of the material to the environment.
Replacing the glass substrate of the traditional display with a flexible plastic substrate can improve the shortcomings of low impact resistance, low flexibility, high weight and high thickness. However, due to the poor water and oxygen barrier of the plastic substrate, the substrate used as the display will have problems with gas and moisture penetration, which can easily cause internal material degradation, resulting in a decline in the luminous brightness of the device or a reduction in lifespan .
The preparation of water and gas barrier films on plastic substrates has become one of the common methods to solve the problem. In order to avoid the increase of the barrier film and reduce the penetration rate, the method of continuous deposition of multiple inorganic films (such as multi-layer composite films containing SiOx) is adopted. Preparation of anti-reflection film, so that the water and gas barrier film has anti-reflection effects at the same time.Applications include flexible OLEDs, organic solar cells, inorganic thin film transistors, flexible liquid crystal displays, radio frequency identification systems (RFID), electronic paper, etc.
Figure 2. Product applications include (A) flexible liquid crystal displays, (B) organic solar cells, (C) electronic paper, etc.[3-5]
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