psoriasis1
Xu Rui photoelectric LED chip 350 million U.S. dollars project settled in Foshan
psoriasis8 发表于 2010-04-20 18:03:05
LED industry in the blowout phase, the market arrogant compelling, cited numerous capital Jingzhe Yao. In Guangdong Province alone, there are already in Shenzhen, Dongguan, Foshan, in the three places will be LED industry as a pillar industry to nurture the development of emerging. Even more gratifying is that the domestic LED industry, is moving from the downstream packaging areas, continuing to expand the upstream area of the chip to continuously improve the industrial chain, for the entire industry, laying a solid foundation for the development.
recently, with a total investment of 350 million U.S. dollars in Asahi Swiss LED epitaxial silicon photovoltaic project launched in Foshan, South China Sea. As a Swiss Asahi Optical's foreign shareholders, one of the world's top three LED chip giant, the United States Sem iLEDs Corporation (Xuming optical) accounted for 49% of shares. Asahi Optical settled dimmable in Foshan, Sweden, coupled with the snow had settled in Wright, Foshan, Nanhai United States, Akinobu Group, Chi-Sheng optoelectronics, GeIL electronic led street light business, Foshan, LED industry, capital of the South China Sea can be described as almost certain.
first settled in the upper reaches of LED chip factory in China
LED industry, the market blowout period, which has become industry consensus. However, the downstream area of a large packaging capacity and the upper reaches of the relatively weak field of LED chips, LED industry has become a serious hazard. Therefore, the upstream chip area expansion, has become the inevitable trend of industrial development.
covers an area of 100 acres, a total investment of more than 350 million U.S. dollars in LE D chip production project --- Xu Rui Optoelectronics recently in Nanhai District,Led street light, Foshan City, laid the foundation stone.
Sweden, according to Asahi Optical directors, the National Star Power president and general manager Wang? ho, Xu Rui photoelectric total investment over 350 million U.S. dollars, in three phases. The first phase of a total investment of about 6 billion yuan, three investment is expected to be completed at the end of 2013.
"outside the LED chip manufacturers in the domestic investment, generally based LED chip packaging industry, while the Asahi Optical Swedish project is the LED chip manufacturers for the first time outside of the upper branches in China. "National Semiconductor Lighting Engineering and Industry Alliance chairman, Chinese Academy of Sciences, said Jin-Min Li, director of the semiconductor.
LED chips into the meat and potatoes of
Xu Rui optical targeting LED chips, are spotted on the high-power LED application market, the growing demand for LED chips.
the global TV market, the rapid development of LED, LED lighting application markets coupled with the rapid development of the upper reaches of LED chips in short supply. LED Net CEO Zhang Xiaofei, said LED chips and even in 2011 will continue, out of stock situation.
more than two months ago, the world's top three LED chip giant Sharp Corporation, one of the United States Section (Cree) in Huizhou invest 50 million U.S. dollars to build LED chip factory in North America outside of a Cree chip production base in the first one. Cree's expansion trend, indicating that LED chip giant on the market optimistic about the future.
"LED chip, a fundamental Buchou Mai. "Nanhai District, Foshan City, Mayor Ou Kunitoshi said.
the South China Sea ecosystem LED industry to perfect the
city of Guangdong as the country's LED industry has already become the main battlefield expeditions princes separate ways, while the government's support of industry, but also for the industry to create a favorable external conditions for .
At present, Shenzhen, Dongguan and Foshan, the three cities will be LE D industry as an emerging strategic industries for development. The South China Sea as an example of Foshan, Nanhai District, Foshan City, now has gathered snow Wright, Nanhai United States, Akinobu Group, Chi-Sheng optoelectronics, electronics, LED GeIL upstream and downstream businesses, Asahi Optical's settled in Switzerland, making the LED industry, the South China Sea ecosystem tends to improve. In addition, the South China Sea city with Sun Yat-sen, Huazhong University of Science and the Hong Kong University of Science and other universities to set up a close relationship between the LED production and research, is planning to build Hong Kong University of Science and Technology LED industry, engineering and technology research and development centers. Foshan Nanhai has been built from chip research, equipment manufacturing, LED epitaxial chip manufacturing, high-power package, application product development, pilot and production, product testing to the market circulation of LED industry chain.
Nanhai District, Foshan City, according to Mayor Ou Kunitoshi said the LED industry, in order to promote the development of the South China Sea area has also established a total scale of 1 billion to 2 billion yuan of special funds for the development of LED industry. Three to five years later, Foshan, South China Sea is expected to become well-known LED industry base. Reporter Gao Lingyun
LED power supply basics
psoriasis8 发表于 2010-04-20 18:02:43
led lamp basic knowledge of this power source: China LED Net Keywords: LED power and the traditional lamp power is completely different, the first LED will not receive direct use of conventional power grid voltage, in order to meet the special LED voltage and current requirements must be based on the characteristics of LED light source designed specifically for voltage conversion device, LED to work properly, different design methods, it will be a variety of health performance and conversion efficiency of the LED power supply, so only high-performance power LED light source in order for the stability hair-hui its greatest advantage, otherwise we can not highlight a special energy-saving LED. Let's look at the detailed knowledge of LED power supply. First, LED power supply according to driving method can be divided into two categories: first, the constant current-type drive power: (1), constant current drive circuit output current is constant, while the output DC voltage is with the size of the load resistance within a certain range of different changes in the load resistance is small, the output voltage is low, load resistance greater the higher the output voltage; (2), constant-current circuit are not afraid of the load short-circuit, but completely open circuit load is strictly prohibited. (3) , constant current LED driver circuit driving is more ideal, but the relatively higher price. (4), should pay attention to the use of maximum current and voltage values of tolerance, which limits the use of LED quantity; second, Regulators formula: (1), when the regulator to determine the parameters of the circuit after the output voltage is fixed, while the output current but increase or decrease as the load change; (2), open circuit voltage regulator circuits are not afraid of the load, but is prohibited complete short-circuit the load. (3) to regulator drive circuit driving led lamp, each coupled with a suitable resistor string need to be so that each string of LED display brightness average; (4),Mr16, the brightness will be affected by changes in the voltage rectified from the impact. Other according to the design of the circuit structure is divided into six categories (1), resistors, capacitor step-down mode: The capacitor step-down, in the flashing used, due to charge and discharge the role of the instantaneous current through the LED a great, easy to damage the package. Yi subject to line voltage fluctuations, power efficiency is low, low reliability. (2) resistance step-down mode: The step-down resistor, grid voltage change by the interference of large, regulated power supply is not easily made, step-down resistor consumes a large proportion of energy, so this power supply power supply efficiency is low, and lower reliability of the systems. (3) Conventional transformer step-down mode: power small size, the weight of too much weight, power efficiency is very low, generally only 45 % to 60%, so seldom used, reliability is not high. (4) electronic transformer step-down mode: power efficiency in low voltage range is not wide, generally 180 ~ 240V, large ripple interference. (5) RCC drop voltage mode switching power supply: Regulator relatively wide range, power efficiency is relatively high, generally can be 70% ~ 80% of applications are wider. Because of this control method of the oscillation frequency is not continuous, the switching frequency is not easy to control, load voltage ripple coefficient is relatively large, abnormal loads poor adaptability. (6) PWM control mode switching power supply: mainly consists of four parts, input rectifier filter section, the output rectifier filter section, PWM regulator control section, switching energy conversion components. PWM Switch The basic working principle of regulation is the input voltage, the internal parameters and external load changes in circumstances, the control circuit is controlled by the difference between signal and reference signals for closed-loop feedback, adjust the main circuit switching device turn-on pulse width, makes the switch the power supply output voltage or current stable (ie the corresponding power supply or a constant current power source.) high power efficiency, the general can do 80% ~ 90%, the output voltage and current stability. in general these circuits are well protection measures , is a high-reliability power supply. Daily life, buy a lamp, the lamp may ask the boss to drive you need a half or full-drive power, or whether a wide voltage. Chang and a half drive is 180V ~ 240V or 80V ~ 130V, you have the right to choose according to the actual, full-drive and wide-voltage is in fact a meaning, but a different version fills refers to 80V ~ 240V power supply can be used p "
XH-750E K75 polyurethane dry laminating adhesive
psoriasis8 发表于 2010-04-19 14:42:50
XH-750E/K75 polyurethane dry laminating adhesive
Products:
an overview of:
XH-750E/K75 is a high performance, high-solids, low viscosity two component Reactive polyurethane dry laminating adhesive for flexible packaging of food composites OPP, CPP, CPE, PE, PET, NY, VMPET, VMCPP such as the substrate layer composite.
two product features:
1, for a variety of thin-film substrates with good adhesion, especially for thin-film substrates which are difficult to stick, such as PVC, EVA and PE at the end of the thicker films have a better bonding effects;
2, fast curing, curing time is short, be suitable for fast-curing composite yoga material used in flexible packaging;
3, has a good initial viscosity and better peel strength, can reduce the complex process due to done sexual tension control and two different film substrates produced by tunnel syndrome;
4, has good heat resistance, enhanced multi-layer structure at the end of the thick layer of PE film has better sealing performance; " br> 5, has a good wetting, flow level performance, suitable for high-speed coating, thick layer and multi-material composite.
3, the product specifications:
Model Master Agent: XH-750E Curing Agent: XH-K75
polyester polyurethane polyol resin system TDI-TMP polymer
Appearance colorless or light yellow transparent Colorless or light yellow viscous liquid and transparent viscous liquid
Solid content (%) 75 ± 2 75 ± 2
solvents ethyl acetate, ethyl acetate
Viscosity (mPa.s 25 ℃) 2500 -- 5000 1000-4000
4, reference ratio:
General XH-750E/K75 = 100/15-18; the user according to their own situation to determine the proportion of formulations, such as the rigid application of aluminum-plastic composite yoga materials, curing agent the ratio should be increased 10 to 15%. If there is no special requirements, the Company will in accordance with XH-750E / / K75 = 100/16 ratio of available to the user.
5, dilution solvents and requirements:
generally ethyl acetate; require solvent water content ≤ 0.2%, not contain alcohol, amines and other active hydrogen containing solvents.
6, the application scope: generally dry compound
7, coating weight :2.5-5g / m2 (dry basis), (based on thin-film structure for processing, use, quality, determined by different requirements)
8, composite drying of temperature: 60 ℃ -70 ℃ -80 ℃ (reference value)
9, curing temperature: 40 ℃ -50 ℃
10, aging time :24-48 hours or more
Note :
1, the product was quick-drying products, solvents to release faster, easier to form a dry phenomenon, the printing film composite VMPET, VMCPP and the AL should pay attention to control the amount of coating on the plastic and bake Road, the first paragraph of temperature is not too much high, to avoid the forequipment mation of white spots and increase the amount of residual solvents.
2, the main agent and curing agent ratio, the user should be based on the structure of film, print status, climatic conditions and environmental humidity may be. The use of alcohol-containing thinner printed ink where the composite films, the user should be the ratio of curing agent on the basis of the original increase of 10% or so.
3, was bonded to the substrate to be clean and dry, no dust, oil, and must be accompanied by corona treatment, surface tension of not less than 38 dyne.
4, thin-film additive type, glue concentration, network roll-depth, line number on the adhesive strength of composite membrane influence, use the former to choose.
5, compound the process should pay attention to check and control adhesive viscosity; a sufficient amount of coating and fully curing.
6, open the package, you must run out in the short term, in particular, easy to absorb moisture curing agent deterioration, but also should pay attention to dry, sealed lamp storage.
7, deployed after the adhesive should be used up within 8 hours, such as the apparent viscosity of adhesive was found to increase or rendered turbid should be discontinued.
above information is for reference purposes only user, the specific use according to the user's various production processes, membrane structure determined, the user should be conducted prior to use adequate testing, the adverse consequences of improper use, the Division live any responsibility.
My Screen
psoriasis8 发表于 2010-04-19 14:16:40
my screen September 14, 2009 Monday, 5:58 pm Hong-Chang Chang Ming, Hebei Anping Metal Wire Mesh Factory Tel 086-0318-5289293Tel
Beixin Road, Anping County, Hebei Province Electric Power Bureau northbound 100 meters Road East Fax 086-0318-5288181 Mobile
corporate Liu Wei, Wang Wang
Contact Website ZIP 053600, Hebei Anping first pay a deposit, shall arrive fat
About
Hebei Anping Metal Wire Mesh Hongchang plant - is a professional dedicated to the production deduction wire, tie wire of small volume, U type wire, cut wire, galvanized wire, copper wire, stainless steel wire, barbed wire, heavy hexagonal wire mesh, chain link fence, welded wire mesh, Crimped Wire Mesh , special-shaped wire mesh and other specialized businesses, products widely used in construction, mining, aerospace, petroleum, chemical, food, medicine, rubber, plastics, machinery and other industries.
factory is the production and sales of wire mesh into a professional enterprise, with advanced production equipment and technology. Production of all products, reliable quality, competitive price and complete specifications. We are part of "honesty, quality first, customer first" business philosophy, the spirit of "excellence, innovation, efficiency," the spirit of merchants and universally established a good cooperative relationship, the customer throughout the country, products have been sold overseas.
Our aim is "faith-based, research innovation, quality, and create a win-win." Provide our clients with the finest products and best services, and work together to create brilliant! All my colleagues in my company invites customers to visit and negotiate business!
Company Introduction (short)
Hongchang Hebei Anping Metal Wire Mesh Factory is the production and sale of wire mesh into a professional enterprise, our factory has advanced production equipment and technology, product buckle wire, tie wire , cut wire, U type wire, wire, PVC wire, anneaflood light wire, galvanized wire, copper wire, yellow wire, purple copper wire, stainless steel wire, shaped wire, barbed wire, window screen, special-shaped wire mesh, paper net, welding net, chain link fence, hexagonal wire mesh, perforated metal mesh, expanded metal mesh, wire meshes, fencing wire mesh and other wire mesh products and wire mesh deep processing.
our customers all over the country, the products are exported to overseas. "integrity-based, research innovation, quality, and create a win-win" is our constant business purposes! The main products
buckle wire, tie wire, cut wire, U type wire, wire, PVC wire, anneapar38 wire, galvanized wire, copper wire, yellow wire, purple copper wire, stainless steel wire, shaped wire, barbed wire, window screen , special-shaped wire mesh, paper net, welded wire mesh, chain link fence, hexagonal wire mesh, perforated metal mesh, expanded metal mesh, wire meshes, fencing wire mesh
product a buckle wire, tie wire, copper wire, galvanized wire, Barbed wire, screens, mesh, welded wire mesh, chain link fence, hexagonal wire mesh, expanded metal mesh
Product 2 buckle wire, tie wire, copper wire, welded wire mesh, chain link fence, expanded metal mesh buckle wire, tie wire, copper-clad steel
conveyor belt, I-shaped net, dense grain network, square wire mesh, plain weave net, copper mesh, single-strand barbed wire, barbed wire, decorative wire mesh, the U.S. grid
buckle wire, tie wire, cut off wire, U type wire, galvanized wire, copper wire, stainless steel wire, window screening, special-shaped wire mesh, welded mesh, Chain Link Fence, Hexagonal Wire Mesh, perforated metal mesh, expanded metal mesh, crimped mesh, wire mesh fence
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Comparison of LED epitaxial film of the substrate
psoriasis8 发表于 2010-04-16 11:53:11
in the LED epitaxial wafers (LED epitaxial wafers) process, different substrate materials require different epitaxial (the growth of epitaxial films) technology, chip processing technology and packaging technology, substrate material determines the development of semiconductor lighting technology line. The choice of substrate depends primarily on the following nine areas, the choice of substrate should have to meet all the good features. Therefore, at present only through changes in technology, epitaxial growth and device processing technology adjustments to accommodate different substrates of semiconductor light-emitting devices R & D and production. GaN substrates used in the study are more, but it can be used to produce substrates are only two kinds, namely, Al2O3 sapphire and silicon carbide SiC substrate.
If we look at LED substrate yoga material, a good material should have characteristics as follows: 1, structural characteristics of good epitaxial film material and the substrate crystal structure of the same or similar lattice constant mismatch of small, crystalline properties Well, defect density. 2, interface characteristics of good, is conducive to feed into the core and the epitaxial wafers and strong adhesion. 3, chemical stability, in the epitaxial film growth temperature and the atmosphere is not easy to break down and corrosion. 4, thermal performance, including good thermal conductivity and thermal mismatch of the small. 5, good conductivity and can be made of the upper and lower structures. 6, optical performance, produced by the light emitted by the device substrate absorb. 7, good mechanical properties, the device easy processing, including thinning, polishing and cutting. 8, low price. 9, large size, generally require diameter of not less than 2 Ying?.
In general, LED substrates What then?
1, GaN substrates used for GaN growth is naturally the ideal GaN single crystal substrate equipment material, which can greatly enhance the film crystalline quality epitaxial wafers, lower bit error density, improve service life of the device to improve luminous efficiency and device operating current density. However, the preparation of gallium nitride single crystal equipment material body is very difficult, so far not yet effective approach. Some researchers in other substrates by HVPE method (such as Al2O3, SiC, LGO) on the growth of GaN thick film, and then stripping the substrate and the GaN thick film technology to achieve the separation, after the separation of the GaN thick film can be used as epitaxial substrate used. So obtained is very obvious advantages of GaN thick film, that is it as substrate for GaN epitaxial films bit the wrong density, than in the Al2O3, SiC epitaxial GaN films on the dislocation density to be significantly lower bit ; but expensive. GaN thick film as a result of the substrate semiconductor lighting use is limited.
2, Al2O3 substrate for GaN growth is currently the most common substrate is Al2O3, the advantage of chemical stability is good, does not absorb visible light, moderate price, manufacturing technology is relatively mature; less concerned, although a lot, but are 11 be overcome, such as the large lattice mismatch has been the growth of technology to overcome the transition layer, poor electrical conductivity through the ipsilateral P, N electrodes are overcome, the poor mechanical properties difficult to cut through the laser dicing overcome, and a big epitaxial layer of thermal mismatch on the formation of compressive stress and thus will not crack. However, the poor thermal conductivity of the device under small current work does not reveal clearly insufficient, but in the power-type device under high current work of a very acute problem.
3, SiC substrates in addition Al2O3 substrate, the substrate is currently used for GaN growth of SiC, its market share ranks No. 2, are not aware of a third substrate for the nitrogen Gallium LED-based commercial production. It has many outstanding advantages, such as chemical stability, good conductivity, thermal conductivity is good, does not absorb visible light and so on, but also less prominent, such as the price is too high, the crystal quality and difficult to achieve Al2O3 and Si is so good, machining properties are relatively poor. In addition, SiC substrates to absorb UV light below 380 nm is not suitable for R & D 380 nm following UV LED. SiC substrate due to excellent performance and thermal conductivity properties, such as Al2O3 substrates do not need to power-GaN LED device is flip-chip technology to solve heat dissipation problems, instead of using the upper and lower electrode structure, can be a better solution to power-type GaN LED device heat dissipation. At present the international community to provide high-quality commercially available SiC substrate manufacturers only the United States CREE company.
4, Si substrate on silicon substrates prepared by light-emitting diode is the dream of a field of thing, because once the technology is a breakthrough, the growth of the cost of epitaxial wafers and device processing costs will fall significantly. Si films of GaN substrate material has many advantages such as high quality crystal, size large, low cost, easy processing, good electrical conductivity, thermal conductivity and thermal stability. However, since the GaN epitaxial layer and the Si substrate exists between the large lattice mismatch and thermal mismatch, and the GaN growth process in easy to form amorphous silicon nitride, so it is difficult for non-Si substrate turtle Crack and device-quality GaN materials. In addition, because silicon substrate absorbs light of a serious, LED Idemitsu inefficient.
5, ZnO substrate GaN epitaxial films as a reason why the ZnO substrate candidates because they both have a very striking similarities. Both the same crystal structure, lattice mismatch is extremely small, near the band gap (the value of the energy band discontinuity is small, little contact with the barrier). However, ZnO epitaxial GaN substrates as a fatal weakness is in the GaN epitaxial growth temperature and atmosphere that can easily break down and corrosion. Currently, ZnO semiconductor materials not yet used to create optoelectronic devices or high-temperature electronic devices, mainly the quality of materials, devices reach the standard and P-type doping problem is not a real solution, suitable for the growth of ZnO-based semiconductor materials, equipment has not yet developed. The focus of future research and development is to find a suitable growth method. However, ZnO itself is a potential luminescent material. Band gap of ZnO of 3.37 eV, is a direct band gap, and GaN, SiC, diamond and other wide band gap semiconductor material compared to its purple band near 380 nm the greatest potential for development is a highly efficient light-emitting device purple, low-threshold the value of a candidate purple semiconductor laser material. The growth of ZnO materials, very safe, can use water without any toxic oxygen source, using an organic zinc as zinc source
Chain Link Fence Eleventh head song
psoriasis8 发表于 2010-04-16 11:44:49
Open before the webpage, ensure acoustics 嘅 position is good first please, press later link, close your 嘅 double key point next, listen to a song to imagine his to be being held in arms at the same time at the same time love 嘅 fruit individual most, jump to be planted closely if really the slowest board 嘅 steps. . . . . . Very happy 咁 listens a song! Get drunk, the aftertaste is planted if really happy 嘅 feeling. . . . . .
Be aimed at head song, be very sorry about the ground, here I must introduce more (QQ leaves a message board write hm pour 咁 much word) . Above all, head itself of song 嘅 libretto fastens a poem, its translation has version of a lot of a lot of 嘅 on 喺 net, but department interpret is gotten hm the department is too good, because 嘅 of Sino-US culture difference concerns,basically be fastened! Simple 嘅 is looked like among my disclosure a few deep-seated meanings hide really inside the word, oneself pass 嘅 deliberate countless times, get 嘅 translates as follows:
" Flightless Bird, american Mouth " - Iron & Wine
Lose alar bird, the beak of beautiful type (my individual thinks degree indicate acting 嘅 is American country bird -- hoary head eagle)
I Was A Quick Wet Boy
I ever was lachrymose (benighted) the boy
Diving Too Deep For Coins
Wallow in for money too greatly
All Of Your Straight Blind Eyes
You that is orthoptic ahead, overflow aimless double eye
Wide On My Plastic Toys
The line of sight falls on my plastic toy
And When The Cops Closed The Fair
Close market when the police when rising
I Cut My Long Baby Hair
I cut off my babyish long hair
Stole Me A Dog-eared Map
Stole the one map that Zhang Juan lost part
And Calflood light For You Everywhere
I am looking for you everywhere
Have I Found You?
Do I find you?
Flightless Bird, jealous, weeping
Lose alar bird, be frighted (and be full of suspicious) , crying
Or Lost You?
Had or lost you?
American Mouth
Hoary head eagle (the beak of beautiful type)
Big Bill Looming
Curassow mouth, if show,be like conceamr16
Now I ' M A Fat House Cat
I am a fat moggy now
Cursing My Sore Blunt Tongue
Cursing me to do not have conscious tongue because of inflampvc mation then
Watching The Warm Poison Rats
Look at firm by the mice of kill with poison
Curl Through The WideChain Link Fence Cracks
(mice) crinkly between the big break in paling
Kissing On Magazine Photos
Kissing the photograph on the magazine
Those Fishing Lures Thrown In The Cold And Clean
Those bait are thrown into iciness and pure
Blood Of Christ Mountain Stream
Sanguine Christ hill goes in brook
Have I Found You?
I find you
Flightless Bird, brown Hair Bleeding
Lose alar bird, brown feather is in drip blood
Or Lost You?
Did or lose you?
American Mouth
Hoary head eagle (the beak of beautiful type)
Big Bill, stuck Going Down
Curassow mouth, choking with sobs, gone
Tell a little finally author, 嚟 from Beam of strong person of music of American Country bound, fasten talent of 嘅 of a great minds equipment mature slowly allegedly. I feel in recent years 喺 country music (balladry) domain, can keep abreast of with 佢 , not Xiang Baizhong 嘅 has Tamas Wells only, tell with respect to poetic flavour and impressive rate 嚟 however, the individual thinks head the song has been surmounted left " Valder Fields " .
Go helping a center, how does understanding restore a service afresh.
