Dispensing gland white-light nixie tube and production process thereof
A production process and digital tube technology, applied in the direction of instruments, electrical components, circuits, etc., can solve the problems of environmental protection, many production processes, and environmental pollution, and achieve the effects of energy saving, time saving, and process saving
Active Publication Date: 2013-03-27
SHAOXING GUANGCAI DISPLAY TECH
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Problems solved by technology
[0016] 1. Using a large dose of epoxy resin for encapsulation will not only increase the production cost, but also pollute the environment and is not environmentally friendly;
[0017] 2. Long-term high-temperature baking will seriously affect the service life of white light digital tubes;
[0018] 3. There are many production processes and the process is complicated
Method used
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Embodiment Construction
[0055] Such as figure 1 and figure 2 As shown, a dispensing gland white light digital tube includes a reflective cover 1 and a PCB substrate 2, wherein the PCB substrate 2 is installed on the back of the reflective cover 1, and the PCB substrate 2 is provided with 6 electrodes 21 and 7 solder joints. The disc 22 is soldered with a semiconductor chip 23 capable of emitting blue light photons, and the semiconductor chip 23 is covered with a layer of colloid 24 composed of silica gel and yellow fluorescent powder. The aforementioned semiconductor chip 23 is connected to the bonding pads through aluminum wires. The electrodes 21 are welded on both sides of the PCB substrate 2 for connecting external circuits. Covering the semiconductor chip 23 with a small dose of colloid does not require a large dose of epoxy resin to fill the light channel 11 , which saves materials and is environmentally friendly.
[0056] In this example, if Figure 3-Figure 5As shown, the upper surface o...
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The invention discloses a dispensing gland white-light nixie tube and a production process thereof, which belong to the field of LED (Light-Emitting Diode) nixie tube packaging. The white-light nixie tube comprises a reflection cover and a PCB (Printed Circuit Board) substrate, wherein the PCB substrate is mounted on the back face of the reflection cover and is provided with a plurality of electrodes and welding discs; the welding discs are provided with semiconductor chips capable of sending out blue light photons in a welding manner; and one layer of gel formed by silica gel and yellow fluorescent powder covers the semiconductor chips. According a dispensing process is used for replacing the conventional gel filling process, gel with small dosage covers the semiconductor chips, and a light-emitting channel does not need to be filled with epoxy resin with large dosage, so that materials are saved and environmental protection is realized.
Description
technical field [0001] The invention relates to a glue dispensing and capping white light digital tube and a production process thereof, belonging to the field of LED digital tube packaging. Background technique [0002] In the traditional white light digital tube structure, the blue light chip is welded in the pad on the PCB, and then covered with a reflective cover, and the light channel of the reflective cover is filled with epoxy resin mixed with phosphor powder and cured at high temperature. The working principle of this white light digital tube is that the blue light chip is excited by electrons to produce blue light photons, the blue photons excite the fluorescent powder mixed in epoxy resin to produce yellow light photons, and white light is produced by the interaction of blue light photons and yellow light photons. Because the main light of the light channel of the traditional white light digital tube is the straight channel where the chip emits light (that is, the ...
Claims
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IPC IPC(8): G09F9/33H01L33/48H01L33/60
Inventor 劳铁均孔宝根盛立军黄新锋
Owner SHAOXING GUANGCAI DISPLAY TECH