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White bias to blue paster type light-emitting diode and producing method thereof

A white-to-blue patch type, light-emitting diode technology, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of poor luminous efficiency, unsatisfactory, and unsatisfactory, and achieve small size, reduced manufacturing cost, and energy saving. significant effect

Active Publication Date: 2005-12-14
浙江古越龙山电子科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second is the white light LED developed by Japan's Sumitomo Electric, which uses zinc selenide (ZnSe) as the material. Demand exceeds supply
Single white (0.31, 0.32) and warm white (0.42, 0.41) can no longer fully satisfy mobile phone consumers' pursuit of bright and colorful light-emitting components for mobile phone displays; they cannot meet the needs of individualization and fashion

Method used

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  • White bias to blue paster type light-emitting diode and producing method thereof
  • White bias to blue paster type light-emitting diode and producing method thereof
  • White bias to blue paster type light-emitting diode and producing method thereof

Examples

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Embodiment 1

[0027] Embodiment 1: as figure 1 As shown, the white bluish SMD LED includes a blue chip 1, a wire 2, a printed circuit board 4 and a fluorescent rubber cake 3, the fluorescent rubber cake 3 covers the blue chip 1, and the wire 2 connects the positive and negative of the blue chip 1. The pole is connected to the printed circuit board 4, the fluorescent rubber cake 3 is epoxy resin containing yellow phosphor powder, the blue light chip 1 is an ordinary Ni / Au nitride blue light emitting diode chip, and its wavelength is 462.5-465nm, and the fluorescent rubber cake 3 The yellow phosphor powder is cerium-doped yttrium aluminum garnet phosphor powder, the thickness of the fluorescent rubber cake 3 is 0.3 mm, and the raw material of each 100 grams of the fluorescent rubber cake 3 is: 9 grams of yellow phosphor powder (where Dysprosium (Dy) is 0.03 grams), 91 grams of epoxy resin, the principle of the present invention is to excite the yellow fluorescent powder with a 462.5-465nm blu...

Embodiment 2

[0028] Embodiment 2: the thickness of fluorescent rubber cake 3 is 0.35mm, and the raw material of every 100 grams of fluorescent rubber cake 3 is: yellow fluorescent powder 6 grams (wherein dysprosium (Dy) 0.04 grams), epoxy resin 94 grams, all the other are the same as embodiment 1.

Embodiment 3

[0029] Embodiment 3: The technological process of the white bluish patch type light-emitting diode is as follows: a. expand the core of the original blue light disc to make the spacing meet the production requirements, b. put silver glue on the 4 circuits of the printed circuit board for pasting Blu-ray chip 1, c. paste the blue-ray chip 1 on the silver glue, and then cure it at a temperature of 100°C-180°C, d. clean it with plasma ion spraying, restore the surface of the printed circuit board 4 and the blue-ray chip 1, e. Use ultrasonic welding wires 2 to connect the positive and negative poles of the blue light chip 1 to the printed circuit board 4, f. hot press with epoxy resin containing yellow phosphor, and cover the blue light chip 1 to protect the circuit and the blue light chip 1, g. At 100°C-180°C temperature, fully cure the epoxy resin, h. Level the PCB 4, attach the adhesive tape on the back of the PCB 4, then stick it on the cutting ring, and cut it into the final p...

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Abstract

The present invention discloses one kind of bluish white patched LED and its making process. The bluish white patched LED includes blue light chip, wires, printed circuit board and fluorescent pad. The fluorescent pad of epoxy resin with yellow phosphor powder covers the blue light chip, and the wires connects the positive and negative poles of the blue light chip to the printed circuit board. The making process includes expanding chip, adhering chip, curing, reducing surface, soldering wires, hot pressing epoxy resin with phosphor powder to form, curing, cutting, washing, UV irradiating, stripping, drying, testing and packing. The present invention is used in cellphone and other electronic product for obtaining colored, personalized and fashioned display.

Description

technical field [0001] The invention relates to a light-emitting diode and a manufacturing method thereof, in particular to a white bluish patch type light-emitting diode and a manufacturing method thereof. Background technique [0002] The so-called white light is a mixture of multiple colors. In the form of white light that can be seen by human eyes, at least two kinds of light must be mixed, such as two-wavelength light (blue light + yellow light) or three-wavelength light (blue light + green light + Red light), the currently commercialized products only have two-wavelength blue light single-chip plus YAG yellow phosphor; in the future, three-wavelength light is more promising, using inorganic ultraviolet light chip plus R.G.B three-color phosphor; in addition, organic single-chip Layer three-wavelength white light-emitting diodes (LEDs) also have the advantages of low cost and easy fabrication. It is expected that three-wavelength white LEDs will...

Claims

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Application Information

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IPC IPC(8): H01L33/00
Inventor 丁申冬许振军陈丹萍沈丽华汪日华李芳
Owner 浙江古越龙山电子科技发展有限公司
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