Method for producing transparent ceramic fluorescence substrate used for LED

Abstract

The present invention discloses a method for producing a transparent ceramic fluorescence substrate used for a LED, which comprises the following steps: (1) mixing; (2) granulating; (3) molding; (4) isopressing; (5) dumping and sintering; (6) polishing and grinding; and (7) scribing. The substrate prepared by the method of the invention can realize all the functions of a traditional substrate, and has fluorescent characteristics, the LED chips can be directly fixed on the substrate for realizing the white light of the LED, because that various concentrations of fluorescent powder in silica gel and resin can be eliminated, the consistency of the LED products can be enhanced, the substrate prepared by the method of the invention has the advantages of good light uniformity, easy thickness control, and the method provided by the invention belongs to the planarization process, and is suitable for integrated large-scale production.

Description

technical field [0001] The LED light source of the present invention particularly relates to a preparation method of a transparent ceramic fluorescent substrate for LED. Background technique [0002] In recent years, whether it is inorganic or organic light-emitting devices (LED / OLED), white LED devices and their applications in lighting-related fields have received great attention from both academic and industrial circles. There are two main ways for white LEDs to produce white light: the first is to combine red, green and blue LED chips to produce white light; the second is to use LEDs to excite photo-induced conversion phosphors to form white light. A more mature method is to use blue LED chips with yellow phosphors (such as YAG: Ce3+, etc.) to achieve white light emission. [0003] For photoconverted white LEDs, the structure and characteristics of phosphor coatings have a crucial impact on the performance of white LEDs. The current process of preparing this type of ph...

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Problems solved by technology

[0008] However, the above process has the following disadvantages: 1. The fluorescent powder mixture will be affected by the shape of the cup mouth of the bracket, resulting in a yellow or blue circle phenomenon, which affects the quality of light output; 2. The way of dispensing is to use gravity and other mechanical effects to mix the phosphor powder. After the liquid flows to wrap the LED chip, it is difficult to ensure the uniformity of the phosphor coating, which affects the uniformity of light emission; 3. The repeatability of the phosphor coating coated on the LED chip is poor, which greatly restricts mass production and Yield

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