LED dispensing process
A technology of dispensing process and LED bracket, which is applied to electrical components, circuits, semiconductor devices, etc., can solve the problems of difficulty in controlling the amount of glue, affecting the uniformity of light output, uneven distribution of phosphor glue, and achieving simple process steps. , easy to operate, uniform lighting effect
Inactive Publication Date: 2016-03-09
JIANGYIN LEXU PHOTOELECTRIC CO LTD
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Problems solved by technology
[0003] It is difficult to control the amount of glue in the encapsulation process for power LED chips with smaller size brackets and LEDs with flat-panel brackets that use the "dam" dispensing method.
When the viscosity of the phosphor glue is small, the phosphor glue is easy to flow out of the LED bracket, causing the phosphor tape to flow out together with the phosphor powder, which makes the phosphor powder distribution on the chip surface uneven, and yellow circles or blue circles appear, such as the viscosity of the phosphor glue is high. At the same time, due to the small fluidity, the uneven distribution of the phosphor glue will affect the uniformity of the light output, and the position of the gold wire will have a greater traction force on the phosphor glue
Method used
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[0017] The present invention will be described in further detail below with reference to the accompanying drawings.
[0018] like figure 1 As shown, the LED dispensing process provided by the present invention includes the following steps:
[0019] Step 1. After dehumidifying and dusting the LED bracket 1, place the LED chip 2 in the bowl 11 of the LED bracket 1;
[0020] Step 2. Fill the fluorescent powder glue 3 into the glue barrel of the automatic dispensing equipment, set the amount of each spray of the dispensing nozzle in the automatic dispensing equipment according to the bowl and cup of the LED bracket, and set the dispensing nozzle in advance. Excess air is exhausted;
[0021] Step 3. Use the automatic dispensing equipment in the second step to apply phosphor glue 3 to the bowl and cup 11 of the LED bracket 1, so that the phosphor glue 3 covers the LED chip 2;
[0022] Step 4. Put the LED bracket 1 that has been dispensed in the step 3 into the oven for baking wit...
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The invention discloses an LED dispensing process, which comprises the following five steps: carrying out dehumidifying and dedusting treatment on an LED bracket; placing an LED chip into a bowl of the LED bracket; dispensing fluorescent powder glue to the bowl of the LED bracket by automatic dispensing equipment, so as to coat the LED chip with the fluorescent powder glue; putting the dispensed LED bracket into an oven for baking within 10 minutes; and finishing the LED dispensing process after molding the fluorescent powder glue. The LED dispensing process disclosed by the invention is simple in process sequence and convenient to operate; and the amount of the fluorescent powder glue is set, so that the LED chip is relatively uniform to shine.
Description
technical field [0001] The invention belongs to the field of LED packaging technology, and particularly relates to an LED glue dispensing process. Background technique [0002] In the LED packaging process, the LED chip is generally fixed and protected by dispensing glue on the LED bracket containing the LED chip. At present, the existing glue dispensing method is to dispense glue from above the LED chip, and the glue liquid forms a glue layer under the action of gravity and surface tension. [0003] For the power LED chips of smaller-sized brackets and the LEDs that use the "dam-enclosed" glue dispensing method, it is difficult to control the glue amount during the packaging process. When the viscosity of the phosphor glue is small, the phosphor glue is easy to flow out of the LED bracket, causing the phosphor glue to flow along with the phosphor powder, making the phosphor powder on the chip surface unevenly distributed, and a yellow or blue circle appears. For example, t...
Claims
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IPC IPC(8): H01L33/00H01L33/52
CPCH01L33/52H01L2933/005
Inventor 胡清辉高芬胡建柏云杨明周
Owner JIANGYIN LEXU PHOTOELECTRIC CO LTD