CN202839734U

CN202839734U - White-light LED

Info

Publication number: CN202839734U
Application number: CN2012204044611U
Authority: CN
Inventors: 吉爱华; 汪英杰; 王凯敏
Original assignee: INNER MONGOLIA HUAYAN XINGUANG TECHNOLOGY Co Ltd
Current assignee: INNER MONGOLIA HUAYAN XINGUANG TECHNOLOGY Co Ltd
Priority date: 2012-08-15
Filing date: 2012-08-15
Publication date: 2013-03-27
Anticipated expiration: 2022-08-15

Abstract

A white-light LED relates to the semiconductor packaging technology field and comprises a bracket. A bracket electrode is arranged on a lower part of the bracket and a heat radiation cup is fixed on the bracket electrode. A blue-light chip is arranged on the bracket electrode mounted at the bottom of the heat radiation cup and a lead is connected between the blue-light chip and the bracket electrode. A size of the blue-light chip is 10 mil * 23 mil. A fluorescent adhesive for adjusting the blue light emitted by the blue-light chip to be white light is coated in the heat radiation cup. The white-light LED provided by the utility model has a small area and light weight and can satisfy people's light and thin requirements to the white-light LED light source. Useful life is long.

Description

White light LEDs

Technical field

The utility model relates to the semiconductor packaging field, particularly a kind of white light LEDs.

Background technology

The LED(Light-Emitting Diode) be a kind of can be the semiconductor of luminous energy with electric energy conversion, it has changed the principle that the incandescent lamp tungsten filament is luminous and the electricity-saving lamp tricolor powder is luminous, and adopts electroluminescence.The spectrum of white light LEDs almost all concentrates on visible light frequency band, white light LEDs and common incandescent lamp, spiral energy-saving lamp and three-color fluorescent lamp are compared, the characteristics of LED are very obvious: long, the high and low radiation of light efficiency of life-span and low-power consumption, exactly because these advantages of LED are so that White-light LED illumination has entered the high-speed developing period.White light LEDs adopts two kinds of methods to form usually: the one, and the method that adopts multiple monochromatic light to mix forms white light; The 2nd, utilize blue chip to cooperate with fluorescent material and form white light.At present, single lamp area of existing white light LEDs is difficult to satisfy people to the short and small frivolous requirement of white light source all greater than 25 square millimeters.

The utility model content

Technical problem to be solved in the utility model provides a kind of white light LEDs, and this white light LEDs area is little, can satisfy people to the short and small frivolous requirement of white LED light source.

For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of white light LEDs, comprise support, the bottom of described support is provided with stent electrode, be fixed with heat radiating cup on the described stent electrode, the described stent electrode that is positioned at described heat radiating cup cup bottom is provided with blue chip, is connected with wire between described blue chip and the described stent electrode, and described blue chip is of a size of 10mil*23mil; Be coated with the fluorescent glue that is adjusted into white light for the blue light that described blue chip is sent in the described heat radiating cup.

As a kind of improvement, the wavelength of described blue chip is 457.5nm ± 2.5nm.

As further improvement, be positioned on the described stent electrode of described heat radiating cup cup bottom and also be provided with the zener in parallel with described blue chip, be connected with wire between described zener and the described stent electrode.

As further improvement, the material of described stent electrode is the C194 copper strips.

The beneficial effects of the utility model are: the blue chip that white light LEDs described in the utility model adopts is of a size of 10mil*23mil, the size of blue chip is less, so that the area of the white LED light source after the encapsulation is also less, only have 4.2 square millimeters, can satisfy people to the short and small frivolous requirement of white LED light source.

Because also be provided with the zener in parallel with blue chip on the stent electrode, zener can play the effect of voltage stabilizing, and blue chip has been played protection, has prolonged the useful life of blue chip.

Because the C194 copper strips that the material of stent electrode adopts, therefore good conductivity, mechanical strength is high, can improve the impact resistance of white light LEDs.

In sum, white light LEDs area described in the utility model is little, lightweight, can satisfy people to the short and small frivolous requirement of white LED light source, and long service life.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of support described in the utility model;

Fig. 3 is the structural representation behind the utility model die bond bonding;

Fig. 4 is the structural representation behind the utility model point fluorescent glue;

Fig. 5 is finished figure of the present utility model;

Among the figure: 1, support, 10, stent electrode, 11, PPA glue, 2, blue chip, 20, chip is anodal, 21, the chip negative pole, 3, wire, 4, fluorescent glue, 5, zener, 6, heat radiating cup.

Embodiment

Below in conjunction with drawings and Examples, further set forth the utility model.

Embodiment one:

Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are common, a kind of white light LEDs, this white light LEDs is SMD3014 lamp pearl, comprise support 1, the bottom of support 1 is provided with stent electrode 10, and stent electrode 10 is provided with the heat radiating cup 6 of being fixed by PPA glue 11, and the stent electrode 10 that is positioned at 6 glasss of bottoms of heat radiating cup is provided with blue chip 2, be connected with wire 3 between blue chip 2 and the stent electrode 10, wire 3 is spun gold; Blue chip 2 is of a size of that the 10mil*23mil(1mil=0.001 inch=0.0254mm), wavelength is 457.5nm ± 2.5nm; Be provided with the fluorescent glue 4 that is adjusted into white light for the blue light that blue chip 2 is sent in the heat radiating cup 6.Because the size of blue chip is less, so that the size of the SMD3014 lamp pearl after the encapsulation is also less, long is 3.0mm, and wide is 1.4mm, and area only has 4.2 square millimeters, can satisfy people to the short and small frivolous requirement of white LED light source.

Fluorescent glue 4 is formulated by following raw materials according, electricity (Shenzhen) Co., Ltd of nitride red fluorescent powder R6733(Ying Te Micron Technology): electricity (Shenzhen) Co., Ltd of just white fluorescent material Y4651(Ying Te Micron Technology): electricity (Shenzhen) Co., Ltd of green emitting phosphor G3560(Ying Te Micron Technology): silica gel 6551AB(DOW CORNING 6551 glue, the ratio of A glue and B glue is 1:1)=X:Y:Z:1000, X=3 wherein, Y=95, Z=2.Owing to having added nitride red fluorescent powder and the green emitting phosphor of high-color rendering on the basis of just white fluorescent material, remedy the defective of each coloured light, made mixed white light more near sunlight, improved color rendering, test draws color rendering index and can reach 95, and the white light that sends is more comfortable soft.

Be positioned on the stent electrode 10 of 6 glasss of bottoms of heat radiating cup and also be provided with zener 5, be provided with wire 3 between zener 5 and the stent electrode 10, zener 5 is voltage stabilizing didoes, is of a size of 7mil, can play a protective role to blue chip 2.

The material of stent electrode 10 is C194 lead frame copper strip, and the C194 lead frame copper strip belongs to the Cu-Fe-P series copper alloy, has good conductivity, the advantage that intensity is high.

The method for packing of a kind of SMD3014 lamp pearl may further comprise the steps:

Make support 1: adopt the C194 copper strips to make stent electrode 10, then adopt PPA glue 11 that heat radiating cup 6 is fixed on the stent electrode 10, form support 1;

Die bond: first zener 5 is fixed on the stent electrode 10, then puts insulating cement at the stent electrode 10 of heat radiating cup 6 bottoms, put blue chip 2, then send into 140～160 ℃ interior the baking 120 ± 5 minutes of baking oven;

Bonding: draw spun gold with bonding equipment from the chip of blue chip 2 anodal 20 and chip negative pole 21 and zener 5, and with spun gold and stent electrode 10 seam of drawing;

Point fluorescent glue: nitride red fluorescent powder R6733, just white fluorescent material Y4651, green emitting phosphor G3560 and silica gel 6551AB are prepared fluorescent glue according to component and the weight portion of 3:95:2:1000, the fluorescent glue for preparing is carried out deaeration to be vacuumized, be coated in uniformly in the half-finished heat radiating cup 6 of SMD3014 lamp pearl that the bonding step finishes with point gum machine, the rim of a cup of the amount of fluorescent glue 4 and heat radiating cup 6 maintains an equal level and is advisable, and then sends into 140～160 ℃ interior the baking 120 ± 5 minutes of baking oven;

Color-division: will put the SMD3014 lamp pearl that the fluorescent glue step finishes and carry out color-division;

Tape package: the SMD3014 lamp pearl that the color-division step is finished carries out tape package, has namely finished the overall process of SMD3014 lamp bead seal dress.

Embodiment two:

Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are common, a kind of white light LEDs, its structure and embodiment one are basic identical, difference is that the component ratio of nitride red fluorescent powder R6733 in the fluorescent glue 4, just white fluorescent material Y4651, green emitting phosphor G3560 and silica gel is: nitride red fluorescent powder R6733: just white fluorescent material Y4651: green emitting phosphor G3560: silica gel=X:Y:Z:1000, X=4 wherein, Y=93, Z=3.

Embodiment three:

Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are common, a kind of white light LEDs, its structure and embodiment one are basic identical, difference is that the component ratio of nitride red fluorescent powder R6733 in the fluorescent glue 4, just white fluorescent material Y4651, green emitting phosphor G3560 and silica gel is: nitride red fluorescent powder R6733: just white fluorescent material Y4651: green emitting phosphor G 3560: silica gel=X:Y:Z:1000, X=7 wherein, Y=87, Z=6.

Embodiment four:

Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are common, a kind of white light LEDs, its structure and embodiment one are basic identical, difference is that the component ratio of nitride red fluorescent powder R6733 in the fluorescent glue 4, just white fluorescent material Y4651, green emitting phosphor G3560 and silica gel is: nitride red fluorescent powder R6733: just white fluorescent material Y4651: green emitting phosphor G3560: silica gel=X:Y:Z:1000, X=10 wherein, Y=80, Z=10.

The utility model is not limited to above-mentioned concrete execution mode, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection range of the present utility model.

Claims

1. white light LEDs, it is characterized in that, comprise support, the bottom of described support is provided with stent electrode, be fixed with heat radiating cup on the described stent electrode, the described stent electrode that is positioned at described heat radiating cup cup bottom is provided with blue chip, is connected with wire between described blue chip and the described stent electrode, and described blue chip is of a size of 10mil*23mil; Be coated with the fluorescent glue that is adjusted into white light for the blue light that described blue chip is sent in the described heat radiating cup.

2. white light LEDs according to claim 1 is characterized in that, the wavelength of described blue chip is 457.5nm ± 2.5nm.

3. white light LEDs according to claim 1 is characterized in that, is positioned on the described stent electrode of described heat radiating cup cup bottom also to be provided with the zener in parallel with described blue chip, is connected with wire between described zener and the described stent electrode.

4. according to claim 1 to 3 each described white light LEDs, it is characterized in that, the material of described stent electrode is the C194 copper strips.