Treatment method for improving surface pollution of LED chip

Abstract

The invention relates to a treatment method for improving surface pollution of an LED chip and belongs to the technical field of the LED chip. The method comprises steps of (1) sequentially placing achip in absolute ethyl alcohol solution and the deionized water for cleaning and scrubbing; (2) sequentially placing the chip in acetic acid aqueous solution and the deionized water for cleaning and scrubbing; (3) cleaning the chip in mixed solution consisting of acid, the deionized water and fluoride, taking out the chip, and washing the chip in the deionized water; (4) placing the chip in a cleaning machine for high-pressure deionized water cleaning, and utilizing nitrogen for blow-drying; and (5) taking out the chip and placing the chip on a heating table for baking, and thoroughly removingthe water vapor. The method is advantaged in that the method is less in raw material consumption, simple in steps, simple and convenient to operate, low in processing cost, and capable of effectivelyremoving surface anomalies such as chip surface pollution, residual reagents, roughness and the like, and improves the chip quality and yield.

Description

technical field [0001] The invention relates to a treatment method for improving surface pollution of LED chips, belonging to the technical field of LED chips. Background technique [0002] LED lighting technology has developed very rapidly. Since the 1960s, relevant statistics have shown that the cost of LEDs has dropped tenfold every ten years, while the luminous efficiency has increased tenfold every ten years. At present, it has been used in living lighting, traffic signals, Architectural decoration, landscape, outdoor display, backlight, toys, clothing and other aspects are accepted by people. At the same time, LED technology is constantly upgrading and innovating to meet the different needs of human production and life. [0003] In the production process of LED, the production of LED chips is an important factor affecting product cost, index and sales. As we all know, the production of LED chips needs to go through multiple steps such as metal coating, graphics produc...

AI Technical Summary

Problems solved by technology

At present, the metal electrode material on the surface of the LED chip electrode in the industry is mainly gold or aluminum. Compared with the aluminum electrode, the gold electrode is better in terms of stability and quality, but the cost is high. Therefore, most LED manufacturers still choose aluminum electrodes as the electrode material. Aluminum is lively. , is susceptible to acid and alkali corrosion, and is more sensitive to the acid-base reaction of the solution and the environment. This is the main reason why aluminum electrodes are prone to surface abnormalities. Of course, it is also related to the surface roughness of electrode evaporation.

In addition, during the normal chip production process, due to the multi-step organic and inorganic reagents and hot nitrogen drying operations, the chip surface is also prone to contamination such as reagent residues, which cannot be effectively removed by ordinary secondary cleaning.

Conventional methods to deal with surface pollution of LED chips are mainly to remove surface pollutants by using organic solvents to clean or physically bombard the chip surface with a glue machine, etching machine, etc., but the effect is limited and often brings new quality problems. In the end, most chips cannot escape the result of quality degradation, and the cost and efficiency affected by the processing method are also a loss

[0005] So far, no reports have been found on the improvement methods for surface abnormalities such as LED chip contamination, roughness, and difficult soldering.

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