Why do electronic products perform electrostatic testing

Electricity discharge may cause electronic products such as mobile phones, electronic products remote control, smart locks, smart LED lighting systems, etc., or e -components, IC chips, LED lamp bead light source modules, etc. Essence Sudden failure causes the permanent failure and short circuit of electronic products. The potential failure can deteriorate the performance parameters of electronic products or LEDs. For example, the leakage current increases. Generally, the hidden dangers formed by the GAN -based LED after being damaged by electrostatic damage cannot be repaired.

LISUN ESD simulator guns (Electrostatic Discharge Generator/Electrostatic Gun/ESD Guns) for electrostatic testing is in full compliance with IEC 61000-4-2, EN61000-4-2, ISO10605, GB/T17626.2, GB/T17215.301 and GB/T17215.322.

What is Electrostatic?
1. Static electricity is a static charge with excess or insufficient surfaces on the surface of the object. It is a kind of electricity.
2. Static electricity is the result of the loss of balance in the local area. Static electricity is formed by the transfer of electrons or ions.
3. Static electricity is a relatively static charge with an object.

What are the characteristics of Electrostatic?
High potential: can reach tens of thousands to hundreds of thousands of volts, and the operations often reach hundreds and thousands. Low -electricity volume: Static current is Microchore (UA). Short action time: nan seconds. Affected by the environment: especially humidity, rising humidity and decreased electrostatic.
The generation of static electricity: contact, friction, flush, voltage, temperature difference, freezing, electrolysis
Harm of static electricity: Static discharge (ESD) causes the breakdown of the PN knot of light -emitting diode. It is the main way to static electricity hazards in the packaging and application of LED devices.

What are the characteristics of static damage?
1. Concealment: The human body cannot directly perceive the electrostatic electricity. Even if the static discharge occurs, the human body may not have the feeling of electric shock. This is because the electrostatic discharge voltage of the human perception is 2-3kV. In most cases, the LED devices can be found through testing or practical applications.
2. Lost: Static discharge may cause LED sudden or potential failure. Sudden failure causes the LED permanent failure: short circuit. The potential failure can deteriorate the performance parameters of LEDs. For example, the leakage current increases. Generally, the hidden dangers formed by the GAN -based LED are not cured by any way.
3. Complexity: In the case of static discharge, the discharge power supply is a space charge, so the energy it stored is limited. Unlike the power supply, it has the ability to continuously discharge, so it can only provide a short -term local breakdown energy.Although the energy of static discharge is small, its discharge wave shape is very complicated, and it is more troublesome to control. In addition, LEDs are extremely fine, and the failure analysis is difficult, making it easy for people to mistake the static damage as other failed. Before the electrostatic discharge damage is fully understood, it is often attributed to the early failure or unknown failure, which is unconsciously covering up unconsciously the real reason for failure.
4. Severe: ESD potential failure only causes partial parameters to be inferior. If it does not exceed the scope of qualification, it means that the damaged LED may pass the final test without notice, resulting in premature effects. In terms of business, the result is the most damaged reputation. ESD occurs quickly with a very high strength. When the discharge current flows through the PN of the LED, the scorched ear heat produces the local medium between the chip PN poles melts, causing PN short circuit or leakage. The design principle of the anti -static area inhibits the accumulation of static charge and the production of static electrical voltage. Such as equipment, instruments, and workflows do not use plastic, organic glass, and ordinary plastic bags.

What are the protection measures for static electricity?
1. Safe, fast, effectively eliminate the static charge, and use rope anti -static wrist -proof and electrostatic chairs, cars, and boxes.
2. Wild and electrostatic ground, anti -static water milling stone, anti -static floor, laying the ground network.
3. ESD protection materials should be used on the table, working chairs, and stool surfaces.
4. The human body wears anti -static uniforms, shoes, wrists, etc.
5. Grounding:
a. The anti -static work area must have a safe and reliable anti -static grounding device, and the ground resistance is less than 4. The anti -static ground line shall not be connected to the power supply line, and shall not be shared with the lightning protection ground line. When using the three -phase and five -line system, its ground line can be used as an anti -static ground line.
b. The work table, floor pads, chairs, stools, and other electrical ESD protection measures shall be connected to the ground line through limited streaming resistance. Land in series.
c. The grounding system of the anti -static work area, including the current limit resistance and the connection terminal, should be reliable and have a certain amount of current. The selection of current -limiting resistance values should ensure that the leakage current should not exceed 5mA, and the lower limit value is 1MΩ.

Anti -static work zone ground

6. When the humidity is less than 60%, the anti -static operating system must be built.
7. The ionizer cannot effectively discharge the static charge. The ionizer can be used to accumulate the charge and other objects through the positive and negative ions in the air in the air. The ionization capacity is greater than 250V/s.
8. The humidifier and humidifier can make the humid air flow and prevent static accumulation.
9. Packaging static sensitive device should be protected by protective packaging; static sensitive device packaging appliances must be stored with anti -static storage boxes and anti -static plastic bags.
10. Transport and storage SSD must be placed in anti -static capacitors (boxes, bags), and use anti -static transportation tools (cars). The warehouse meets the requirements of the anti -static operating system. SSD must put in the anti -static container, and stay away from static electricity, electromagnetic fields or radiation grounds during storage and transportation.
11. SSD components shall be classified and placed, and the electrostatic sensitive symbol symbols meet the GJB1649 regulations.
12. The degree measurement method and timeliness of anti -static materials
a. Fricating call method: 120 cotton cloth/20 times.
b. The resistivity measurement method is better than 1010W.
c. Attenuation constant RC red plastic bags and red foaming time period for half a year, it cannot be exposed in the sun. The black anti -static box is 5 years, and the IC plastic tube is installed.

Waveform

What are the minimum requirements for LED assembly to assemble static electricity?
1. Environment: The control of air humidity is less than 60%, and the anti -static operating system must be strengthened. The anti -static tablecloth on the work table is well grounded, and the effectiveness is checked regularly.
2. Tools: good ground wires, equipment, tools, equipment, equipment, and tools. (Do not share with the human body electrostatic ground wire to prevent the machine, equipment, and tool leakage electric shock personnel)
3. Human body: The human body is equipped with rope anti -static wrist, good ground, and regular testing effective performance every day. Check the static wrist with good contact with human skin, and good contact with ground lines.
4. Avoid and reduce material accumulation and friction
5. Others: In addition to the test instrument, you must also understand the test line of the tester, especially the power supply opening of the constant current test cannot be too high. To prevent the LED from being impacted by the negative feed pulse voltage.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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