White glue, LED lamp bead and packaging method thereof

Abstract

The present invention provides a white glue, a LED lamp bead and a packaging method thereof. The LED lamp bead comprises phosphor, a white glue layer, a LED support, a LED chip and a silica gel lens;the LED chip is arranged at the upper surface of the LED support; the phosphor is arranged at the upper surface and the sides of the LED chip and the upper surface of the LED support through other modes such as spraying; and the silica gel lens is arranged at the upper surface of the phosphor on the chip and the upper surface of the white layer at a middle layer. Other places are coated with the white glue layer except the phosphor arranged on the chip in a packaging process and thus only a luminous zone on the top of the chip of the obtained LED lamp lead is shown from the appearance, and other places are fully coated with white glue, so that clear and uniform light spots are obtained, light intensity of the center of the lamp bead is improved, and the problems are solved that the phosphor on a current LED support is excited and blue light is leaked from the sides of the chip.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a white glue, an LED lamp bead and a packaging method thereof. Background technique [0002] Light Emitting Diode is referred to as LED (Light Emitting Diode), which is made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), etc., and can radiate visible light when electrons and holes recombine. Therefore, it can be used to make light-emitting diodes. Among them, gallium arsenide diodes emit red light, gallium phosphide diodes emit green light, silicon carbide diodes emit yellow light, and gallium nitride diodes emit blue light. At the beginning, it was mostly used as indicator lights, display light-emitting diode boards, etc.; with the emergence of white light LEDs, it was gradually used as lighting. At present, white LEDs have been widely used in various lighting fields, such as mobile lighting, backlighting, flashlights, and automotive l...

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Problems solved by technology

[0004] However, the above-mentioned LEDs have three fatal shortcomings: 1). The material of the chip itself absorbs light, and the brightness will lose 3% to 6%; 2). Whether it is a vertical single-sided light-emitting chip or a flip-chip sapphire chip, there will be a certain proportion of blue light on the side After the mixed light is emitted, it will affect the overall color temperature of the lamp bead to a certain extent; 3). There are colored substances such as green oil and phosphor powder on the bottom plate, which will absorb the light to a certain extent. 4). The luminous angle is higher than that of a normal lens. It will be too large, and the light intensity in the center of the lamp bead is not enough, so it can solve the problem of large angle, insufficient light intensity in the center of the lamp bead, wrong color temperature caused by ordinary LED packaging, and can improve the brightness of the LED lamp bead. Lamp beads have become a demand

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