Lamp brackets are generally copper plated with silver, top and side. High-power brackets are generally made of copper with a silver structure and a plastic reflector. Copper is used for circuit connection, reflection, welding, etc., and plastic is mainly used for reflection. It is provided with glue. Interface and other functions. Among the many factors of the bracket, in addition to the design and properties of the stamping parts, the white high-temperature plastic material is an important factor that affects the quality and stability of the LED. The plastic material used for the SMD bracket is mainly solvay's white PPA material, which is resistant to high temperature welding, high reflection, good combination with silica gel, and good long-term durability. The high-power bracket is generally a plastic reflector + rivet heat dissipation structure. The injection molding process is a very important part of the LED production process Illumination LED. The injection molding process is to place the rolled metal bracket into the injection molding machine with an automatic feeding and rewinding device, and then inject the raw materials.
About PPA: The Chinese name is poly-p-phenylene terephthalamide. It is a semi-crystalline material. The HDT is about 300 degrees, and the Tm is about 320 degrees. It is an aromatic high-temperature nylon, but it absorbs less water than ordinary nylon. This is relatively important for LEDs and has an impact on long-term reliability. Moreover, between different grades of PPA particles, the reliability, initial brightness, application, yellowing resistance, etc. are also different, different manufacturers, the same kind The material is sometimes different because of the craftsmanship Light Emitting Diode Lamp Beads.
development trend
As countries attach importance to the LED industry, LED precision bracket technology also presents the following development directions: 1. The development of low-power to high-power
With the increase in the brightness requirements of LED products, LED products have gradually developed from low power to high power. New application fields such as small-size panel backlights and indoor lighting have gradually expanded Light Emitting Diode F5 In-line. High-brightness LEDs are in a stage of rapid growth, and their proportion has gradually increased. It has become a mainstream LED product, and the matching surface mount LED precision bracket has also been upgraded from low power to high power. High-power surface-mount LED precision brackets are mainly produced in Japan, Taiwan and other countries and regions.
2. Development from lighting to industrial applications
With the development of LED products from lighting to backlight display, the matching surface-mount LED precision brackets must also meet the requirements of high-efficiency solid-state light sources LED light strip. Surface-mount LED precision brackets are mainly produced in Japan, Taiwan, South Korea and other countries and regions, but the domestic enterprise Shenzhen Decai Optoelectronics Co., Ltd. has developed high-efficiency solid-state light source surface-mount LED precision bracket products, and the technology has reached the international advanced Level.
3. The power consumption is getting lower and lower
The energy-saving requirements of LED products are getting higher and higher. In order to reduce the power consumption of LED products, surface-mount LED precision brackets put forward higher requirements for heat dissipation and light concentration Led Bulb.
4. High efficiency production
The role and type of LED bracket
1) The role of the bracket: used to conduct electricity and support 2) The composition of the bracket: the bracket is formed by electroplating the bracket material, and consists of five layers of material, copper, nickel, copper, and silver from the inside to the outside.
3) Types of brackets: (Cup brackets are used for concentrating type, flat head brackets are used for large-angle astigmatism type Lamp)
E.g:
A. 2002 cup/flat head: This kind of bracket is generally made of materials that do not require high angles and brightness.
B. 2003 cup/flat head: generally used to make lamps above φ5, the exposed pin length is +29mm, -27mm. The pin pitch is 2.54mm.
C. 2004 cup/flat head: used to make a lamp of about φ3. Pin length and spacing are the same as 2003 bracket D, 2004LD/DD: used to make blue, white, pure green, and purple lamps, and can be welded with double wires. Darker cup
E. 2006: Both poles are flat-headed, used for flashing Lamp, solid IC, and soldering multiple wires.
F, 2009: Used to make a two-color Lamp, two chips can be fixed in the cup, and three pins control the polarity.
G, 2009-8/3009: Used to make a three-color Lamp, three chips and four pins can be fixed in the cup.
H, 724-B/724-C: used to make piranha brackets.
Introducing precautions
Functional plating
Pay attention to the solderability and the good electrical conductivity of the silver coating, followed by the oxidation resistance of the bracket and other functions: in the unopened package, storage conditions: about 25℃, relative humidity, under the unopened package , Storage conditions: about ℃, <65% or less;
Precautions
a. Do not touch the bracket with bare hands. Touch the stent with bare hands, sweat will adhere to the surface of the stent, subsequent storage or baking will accelerate the discoloration and oxidation of the stent coating and the rust and oxidation of the stent substrate. If you touch the functional area of the stent with your bare hands, the wire bonding effect will be extremely poor;
b. The operating environment should be kept constant, controlled at about ℃, the relative humidity and operating environment should be kept constant, controlled at about 25℃, and the relative humidity should be <65% to prevent oxidation and rusting of the bracket;
c. When the temperature difference between day and night is extremely large, the air flow in the working environment should be minimized, and the brackets that are not working should be sealed and protected by non-sulfur frames and boxes;
d. The LED bracket is in the oven. While maintaining the normal operation of the oven, the exhaust port should be kept in the oven as far as possible to keep it unobstructed;
e. In the low temperature season, try to minimize the storage time of the bare bracket in the process. When the ambient temperature is low, the atmospheric pressure is also low and the air pollution index is high. When the ambient temperature is low, the exhaust gas generated by daily work is difficult to emit , And easily react with silver to cause discoloration.
f. The packaged product should be tinned as soon as possible (including fully plated products), otherwise it will be easy to oxidize the lead pins, resulting in poor appearance and poor soldering; oxidation of the lead legs will lead to poor appearance and poor soldering;
g. Since the flux is acidic, the surface of the product must be thoroughly cleaned after soldering, and there will be residual substances, otherwise it will oxidize and rust in a short time.
h. The storage environment requirements after the finished product are difficult to guarantee due to the change of the copper material. However, due to the change of the copper material, it is proved that the BAR cut of the Children's Palace does not rust. Therefore, in order to improve the quality of the product, it is recommended to use the cut not to rust. With a semi-plated bracket, the semi-finished product after packaging is tinned for protection.
l. The brackets for use need to be stacked in no more than four layers to prevent gravity extrusion and deformation; handle with care during transportation; use a blade to cut the adhesive tape when unpacking.
Markets and trends
LED package bracket market competition pattern
China's existing LED market demand is 42.8 billion, and it is growing at a rate of 30% every year. From the perspective of the overall industry, 70% of my country's current production capacity is concentrated in the downstream application links, lacking core technologies and patents. The surface mount LED precision stent industry is supporting the LED packaging industry. It belongs to the middle reaches of the industry chain and has a high technical content. It is currently monopolized by local and Taiwanese companies. Domestic LED packaging companies need to import a large number of overseas, unable to form localized supporting facilities and reflect cost advantages, which restricts my country's LED industry. In recent years, a number of domestic-funded companies have researched packaging bracket manufacturing technology in order to break the monopoly of foreign companies in this industry In Line LED.
The development direction of LED precision bracket technology
1. Development from small power to high power;
With the increase in the brightness requirements of LED products, LED products are gradually developing from low power to high power. Small-size panel backlights and indoor lighting applications are gradually expanding. High-brightness LEDs are in a stage of rapid growth and have become mainstream LED products. The matching surface mount LED precision bracket has also been upgraded from low power to high power.
2. Development from lighting to industrial applications;
With the development of LED products from lighting to backlight display, the matching surface-mount LED precision brackets must also meet the requirements of high-efficiency solid-state light sources.
3. The power consumption is getting lower and lower;
The energy-saving requirements of LED products are getting higher and higher. In order to reduce the power consumption of LED products, surface-mount LED precision brackets put forward higher requirements for heat dissipation and light concentration.
4. High efficiency production.
LED products are more and more widely used and used in huge quantities. Traditional production methods are inefficient and costly, and cannot adapt to the development of the industry. They need to switch to automated production to improve production efficiency.
The LED package bracket market has a bright future
In response to the increase in demand in the LED application market, the corresponding LED packaging market growth rate has also accelerated, especially the growth of SMD and high-power LED packaging has rapidly become the mainstream trend of the LED packaging market. In the LED packaging market, LED surface-mount packaging brackets account for about 40% of the market share, and the remaining 60% are leaded. From the perspective of technological change, the leaded type will gradually be replaced by the surface-mounted type. .
Judging from the actual domestic demand scale, the demand for surface mount LED precision brackets has grown rapidly and maintained at a growth rate of about 30%, showing strong market demand. Because LEDs have many advantages such as green, environmental protection, and energy saving, they are in line with The national development policy of energy conservation and emission reduction, the overall market trend in the future will continue to be positive Lamp Bead Patch.
The rapid development of LEDs in the emerging application markets of large-size backlights, landscape lighting, and automotive lights will gradually become another booster for the growth of the LED market. China`s LED market demand reached 34.13 billion yuan. In terms of quantity, surface mount LED precision brackets are close to 57.97 billion.
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