Method for detecting water oxygen transmission rate of backplane and packaging structure

Abstract

The invention provides a method and packaging structure for detecting the water-oxygen transmission rate of a backplane, the method comprising: forming a metal electrode pattern on the backplane to be tested; forming a calcium film on the backplane formed with the metal electrode pattern; The backboard formed with the metal electrode pattern and the calcium film is used as a partition to block the dry room and the wet room; the change value of the conductivity of the calcium film is measured through the metal electrode pattern, and the water oxygen content of the back plate is determined according to the measured change value. transmittance. In the present invention, the calcium film is arranged on the backboard to be detected, and the entire backboard is used as a partition to block the drying chamber and the humid chamber to detect the water-oxygen transmission rate. Compared with the prior art, only the backboard is detected The way of packaging materials can more truly reflect the real environment faced by the device that needs to be protected, and improve the accuracy of the water oxygen transmission rate detection of the backplane. On the other hand, making the electrodes for detecting conductivity on the backplane to be tested can reduce the difficulty of testing.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a method and packaging structure for detecting the water-oxygen transmission rate of a backplane. Background technique [0002] Organic light emitting devices (Organic Light Emitting Devices, OLEDs) are widely used in the display field due to their advantages of thinness, high brightness, fast response, and low power consumption. Studies have shown that water and oxygen in the environment have a great impact on the life of OLEDs. The reasons are as follows: 1. Water and oxygen are easy to react with low work function cathode metals (such as aluminum, magnesium, calcium); Organic materials react chemically. Therefore, effective encapsulation of OLEDs to effectively block the contact between water vapor in the atmosphere and the functional layers of the device can prolong the life of the device. [0003] In the prior art, when the water-oxygen transmission rate of the OLED back...

AI Technical Summary

Problems solved by technology

However, it cannot reflect the actual water vapor transmission rate of OLED devices, because in actual packaging, there are complicated metal lines and corners on the backplane, and poor sealing is prone to occur in these places

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