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Reasons for Analysis From the Packaging Process

LED dead lamp phenomena, consumers such as packaging companies, downstream finished products to units and individuals used in use may encounter it. The reason is that there are two types of situations: First, the leakage current of the LED is too large to form a PN knot loss, so that the LED lights are not bright, and the type of situation generally does not affect the work of other LED lights; second, LED, LED, LED The internal connection leader of the light is broken to form a dead lamp for the LED without current passing. The type of situation will affect the general work of other LED lights. V—2.2V, blue -green and white LED work voltage 2.8—3.2V), generally connected with string and connecting to make different work voltages. The more LED lights connected, the greater the impact. The zero -string LED light is not bright, it can be seen that the situation is much more severe than the first type of situation. LED dead lamps are Guan Jian, which affects output quantity and reliability. How to reduce and eliminate dead lamps and increase output volume and reliability is a key issue that needs to be dealt with by sealing and using enterprises. Let's do some analysis and discussions on the formation of dead lamps. 1. Electrostatic damage to the LED chip is damaged to make the PN knot of the LED chip disappear, the leakage current is deleted, and it becomes a kind of resistance. It is a very harmful devil. Tens of millions of dollars of economic loss. Therefore, the electronic component of the anti -line electronic electronic component is a very important job in the electronics industry. Don't take it lightly for LED packaging and LED display companies. If there is a problem in any link, it will cause damage to LED, which will cause the LED performance to deteriorate. We know that the human body (ESD) can reach three thousand volt left left, and the feet can break the LED chip through damage. It is packaging production lines in LED. Whether the ground resistance of various devices can meet the requirements. It is also very important. Generally, ground resistance is required For 4 ohms, the ground resistance is not required to reach≤2 ohm. The damage to the LED of the human body is also very large. When working, wearing anti -static uniforms, with a static electrical ring, static electrostatic ring is a bad show, and there is no good effect on the electrostatic circulation of electrostatic ring. If you do not use this type of product, if the workers violate the operation procedures, they should receive considerable warning education, and at the same time, it also promotes the use of others. How much is the human body with static electricity, the different fabric clothes worn by people, and the volume of each person, in the autumn and winter nights, we are hard to see the discharge between clothes. Vile. The ESD value of the silicon -based base chip is only 1100 volts, and the ESD value of the sapphire base chip is lower, as long as 500—600 volts. A good chip or LED, if we take it with our hands (the body does not take any protective measures), the results can be imagined that the chip or LED will be damaged to varying degrees. The hand is so good that it is so good that it is the scourge of static electricity. If the packaging enterprise does not work strictly in accordance with the land regulations, it is the company itself that will decrease the qualification rate of the product and reduce the economic validity of the enterprise. If the equipment and personnel who use LEDs are not grounded It is inevitable. In accordance with the requirements of the LED standard manual, the LED's lead distance colloid is not less than 3—5 mm, bending or welding, but most of the companies do not do that, but only the thickness of a PCB board (≤2 mm) indirect welding, which will also cause damage or damage to LEDs. Because excessive welding temperature will affect the chip, it will degenerate the chip characteristics and reduce the lighting efficiency, so that the phenomenon is not uncommon. No small enterprise uses manual welding, using 40 wattipaton soldering iron, the welding temperature cannot be controlled, and the soldering iron temperature is 300—Above 400 C, too high welding temperature will also form dead lights. The LED lead is several times higher than the swelling coefficient at 150 C at high temperature. Cold shrinking the welding point open, forming a dead lamp phenomenon. 2. The reason for the phenomenon of the phenomenon of the lamp in the internal connection welding of LeD lights. 2.1 Analysis of the phenomenon of dead lamps 2.1 The production process of the packaging enterprise is not complete, and the inspection method is backward. The closing row is made of copper or iron metal materials by precision molds. Because copper materials are more expensive, the cost is naturally high. Due to the fierce market, the factors are affected. Steel brings stamping LEDs. The iron closure of the iron must be silver -plated. The silver plating does not have two effects. One is to prevent moxibustion and rust. The other is to facilitate welding. It is related to the life of the LED. Before the electroplating, the processing should be carried out strictly in accordance with the rules, and the process of removing, oil removal, and phosphorusization should be perfunctory. , The coating is too thick and the cost is too high, too thin to affect the amount. Because ordinary LED packaging companies do not have the ability to check the amount of electrical plating, it gives some electroplating enterprises without gaps to reduce the silver -plated layer of the electroplating, reduce cost income. The testing method is lacking, and there is no instrument with the thickness and fastness of the straton plating layer. I have seen that I have seen a few months in the warehouse and rusted after a few months. The products made with such closing row are definitely not long, dont say 3—50,000 hours, 10,000 hours is a problem. The reason is very simple every year without a period of time. The weather and air humidity of the air is high, and it is difficult to form a different electroplating metal parts. Even the encapsulated LED will be too thin and the silver -plated layer is too thin, and the welding joints will be taken away to form a dead lamp phenomenon. That is, the lights we have encountered are not turned on, but in fact, the internal solder joints are taken away from the shelf. 2.2 Each process outside the packaging process must be done in accordance with the disadvantage. The reason for the negligence of any link is to form a dead lamp. The glue will return to the chip gold pad to form a short circuit, and the chip will be less sticky. The same is true of dual welded chip point insulation gum. If you order more insulating glue, you will return to the gold pad of the chip to form the virtual welding fruit during welding. There are fewer chips and can not be firm, so the duct must be just right. The welding process is also critical. The coordination of the pressure, time, temperature, and power of the gold wire welding machine must be just right. Except for the time fixed, the other three parameters are adjustable. Dacong is difficult to crush the chip, too small, it is difficult to weld. The welding temperature is generally 280 C. The power conditioning refers to the ultrasonic power conditioning. It is too large and too small. Good materials, test with spring torque test measures≥6 grams, which is qualified. Each year, the parameters of the golden ball welding machine are detected and countered to ensure that the welding parameters are in the best form. In addition, the arc of the welding line is not required. The arc height of the single welding point chip is 1.5-2 chips thickness, and the arc height of the dual welding joint chip is 2-3 chips thickness. The arc height is too low to form a dead lamp when welding. 3. The method of identifying the virtual welding dead lamp will heat the undisturized LED light with a lighter to heat the LED lead to 200-300 C, remove the lighter, and connect the LED with a 3 volt battery and the negative electrode. Light, but the LED light is reduced from light to not on with the extermination temperature, then it proves that the LED light is virtual welding. The reason for the heating can light up is the use of metal thermal contraction and contraction. The LED leader is expanded and extended to the internal solder joints when heating. The drawing contraction to the normal temperature form, disconnect the internal solder point, the LED light is not lit, the type of method repeatedly tried is spiritual. Welding the two -welded lamp on that type of virtual welding is on a metal strip, soaked with thicker sulfuric acid to dissolve the LED external colloid, and the colloid is dissolved and removed. You can find the problem of whether it is first welding or two -welding. Is the parameter of the gold silk ball welding machine incorrect, or other reasons to improve methods and processes. Users who use LED products will also encounter the phenomenon of dead lamps, that is, after the LED products are used for a period of time, the phenomenon of dead lights occurs. There are no two reasons for dead lamps. There is no problem with the amount of electroplating, and the leakage current of the LED chip will also form the LED light will not light up. Now that many LED products are protected by not adding anti -electrostatic protection in order to reduce costs, so it is difficult to be sensible as a static damage chip. It is difficult to show the light supply line in rainy days as high voltage electrostatic, and the peak pulse of the stacked of the electric line, which will cause the LED products to be damaged to varying degrees. There are not many reasons for the death lights. It cannot be listed one by one. From the packaging, use, and the use of various links, it is impossible to appear dead lights. How to increase the amount of LED products is that the demolition enterprise and the use of the enterprise should be highly noticed. And the issue of research research, from chips and rack selection, to LED packaging zero process process, according to the ISO2000 quantity system. As long as the output of the LED can be comprehensively increased, it can be long life, high and reliable. In terms of circuits that are using, selecting voltage -sensitive resistance and PPTC components to improve the protection circuit, add parallel number of parallel routes, and use the constant current switching current. Deletion temperature protection is an invalid measure to improve the reliability of LED products.

Reasons for Analysis From the Packaging Process 1

Author: Tianhui-Air Disinfection

Author: Tianhui-UV Led manufacturers

Author: Tianhui-UV water disinfection

Author: Tianhui-UV LED Solution

Author: Tianhui-UV Led diode

Author: Tianhui-UV Led diodes manufacturers

Author: Tianhui-UV Led module

Author: Tianhui-UV LED Printing System

Author: Tianhui-UV LED mosquito trap

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Development Of UV Leds Under The Epidemic
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Despite their effectiveness, the active chemicals in traditional chemical disinfectants in clinical and laboratory settings pose climate, public health, and infrastructure risks that make their widespread deployment difficult. Additionally, the effectiveness of chemical disinfectants can vary depending on the user and how carefully they follow repeatable cleaning procedures. As an alternative, ultraviolet (UV) radiation has been widely utilized to inactivate numerous microorganisms, including viruses. Ultraviolet light can be automated to produce a repeatable germicidal dose. The introduction of uv led diode gives the very same level of decontamination as the traditional mercury lamps, but with several advantages, including simplicity of retrofit in a variety of usual overhead light sources, with enhanced disinfection capabilities. The effectiveness of UV for cleaning is shown by its straightforward mode of operation. While neighboring thymine bases (or uracil bases in the case of RNA) suffer dimerization, which disrupts the structure of nucleotide sequences and creates "roadblocks" in genome replication, adjacent nucleotide bases in DNA and RNA uniquely absorb UV photons Researchers demonstrated the antiviral effectiveness of a uv led module by inactivating two viruses: the seasonal human Coronavirus 229E (hCoV-229E) and the immunodeficiency virus type 1 (HIV-1). Researchers demonstrate significant reductions in viral replication within seconds after UV-LED exposure by simulating common environmental instances of virus scattering (e.g., sneeze, cough, blood droplets) utilizing droplet dispersal approaches. Our research contributes to the body of knowledge on using UV-LEDs to sanitize high-contact public places. UV-LEDs represent an extra, very effective layer of defense against pathogen spread because they are inexpensive and simple to install into a range of existing light fixtures, especially during an ongoing respiratory infections pandemic. Requirements For UV-LEDs Nine 275 nm LEDs in a 3 3 array and twenty 380 nm LEDs in a 4 5 array comprised the two sets of UV-LEDs that were supplied. The distance between the LEDs and the exposed sample was around 5 cm, and the UV light output from each array ranged from 0.4 to 0.6 mW/cm2. The highest radiation duration was 30 seconds, and the combined arrays supplied a total dose to the radioactive samples ranging from 8 mJ/cm2 to 20 mJ/cm2. The device's entire lighted area was around 10 cm by 20 cm, or 200 cm2, significantly greater than the irradiated sample, and it received a total aquifer dose of 1.6 J to 4 J. 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3528 Infrared Light Beads Are Mainly Used in the Beauty and Physical Therapy Industry
3528 Infrared Light Beads Are Mainly Used in the Beauty and Physical Therapy Industry
The mask beauty instrument is also quite hot in the past two years. There are dozens of lamp beads, and there are thousands of. The advantage is that it can be used directly on the face, and the eye protection structure can also be used. It can also be used for you to swipe and swipe your mobile phone. The disadvantage is that there are some masks, no composite light mode. For example, red, orange and blue are three separate lights, and then the power is relatively low. One is because there are more charging types, and the other is because the large row lights are exposed to 15-20cm interval, and the mask is directly attached to the face on the face. There is no energy loss caused by distance in the middle, so it doesnt need to be very high. The mask on the market ranges from tens of yuan to tens of thousands of yuan, which has a certain relationship with the number, functional model and brand positioning of their lamp beads. 3528 Infrared light beads are mainly used in the beauty and physical therapy industry, including photon rejuvenation instruments, RF radio frequency beauty instruments, hot compress cold therapy instruments, beauty eye meters, red and blue light therapy instruments, large row lamps, phototherapy masks, whitening space compartment, red light, red light, red light, red light, red light, red light, red light, red light Infrared therapy belts, red light infrared therapy insoles, red light infrared therapy mattresses, red light infrared therapy yoga mats, red light infrared neck rivers, red light infrared knees, etc. Zhuhai manufacturers specialize in the production of 3528 infrared light patch lamp beads. New and old customers who need it can come to inquire or contact our official customer service staff. Author: Tianhui-Air Disinfection Author: Tianhui-UV Led manufacturers Author: Tianhui-UV water disinfection Author: Tianhui-UV LED Solution Author: Tianhui-UV Led diode Author: Tianhui-UV Led diodes manufacturers Author: Tianhui-UV Led module Author: Tianhui-UV LED Printing System Author: Tianhui-UV LED mosquito trap
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