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>Difference Between SMD LED and COB LED Package
Posted by crescentled on January 21st Wholesale Houston Astros Jerseys , 2019


The Definition of COB


COB is the abbreviation of chip on board, which means chip on board packaging, a bare chip mounting technology. The semiconductor chip is placed on the printed circuit board, and the electrical connection between the chip and the substrate is realized by the method of lead wire seaming and covered with resin to ensure its reliability. The first step is to cover the placement point of silicon wafer with a thermally conductive epoxy resin (usually an epoxy resin doped with silver particles) on the surface of the substrate, and then place the silicon wafer directly on the placement point Cheap Houston Astros Jerseys , heating the silicon wafer until it is firmly fixed on the substrate. The second step is to establish an electrical connection directly between the silicon wafer and the substrate by wire bonding.




The Definition of SMD


SMD is the abbreviation for Surface Mounted Devices, which is one of the components using surface mount technology. In the initial stages of electronic circuit board production, via assembly was done entirely by hand. After the first automated machines were introduced, they could place some simple lead components, but complex components still required manual placement for wave soldering. Surface mounted components were introduced about twenty years ago and have started a new era. From passive components to active components and integrated circuits Wholesale Astros Jerseys , they have finally become SMD and can be assembled by pick and place equipment. For a long time, it was a common thought that all the lead components could eventually be packaged in SMD LED.


In terms of the production process, COB LED packaging is basically the same with the traditional SMD production process, which has a systematic thermal resistance process of chip-solid glue-solder joint-solder paste-copper foil-insulation layer-aluminium. The systematic thermal resistance of the COB packaging is: chip-solid glue-aluminium. The labour and manufacturing costs of conventional SMD packaging account for about 15% of the cost of materials, while COB packaging only account for about 10%. The efficiency of COB LED package is much higher than SMD products Cheap Astros Jerseys , using COB packaging can save 5% of the labour and manufacturing costs.


The systematic thermal resistance of COB LED packaging is much lower than that of traditional SMD packaging, which greatly improves the useful life of LED. Through the method of patching, traditional SMD LED package puts multiple discrete devices on the PCB to form the light source for LED application, which suffers from the problems of pin light, glare J. R. Richard Astros Jersey , and ghosting. The COB packaging, as integrated package, is a surface light source that has advantage of having a large and adjustable viewing angle, reducing the loss of light refraction.


Compared with traditional SMD LED packaging, COB LED packaging has much more advantages. With the continuous advancement of LED lighting technology Carlos Lee Astros Jersey , COB technology has received more and more attention. Because COB light source has the features of low thermal resistance, high luminous flux density, less glare and uniform luminance, it is now widely applied in indoor and outdoor lighting, such as downlights Roy Oswalt Astros Jersey , bulbs, fluorescent tubes, street lamps, and mining lamps.

El infrarrojo es un rayo de luz que percibimos como calor. El calor infrarrojo no puede ser visto como podemos sentir sus efectos. Calefacci贸n de cuerpo con rayos infrarrojos por un proceso llamado conversi贸n. En este proceso los rayos infrarrojos del cuerpo humano sin hacer ning煤n cambio o calentar el aire en el medio.


El uso de calor infrarrojo en cuanto a los m茅todos tradicionales de calefacci贸n, lo que permite que el calor penetre m谩s profundamente en su cuerpo sin la irritaci贸n de la piel de las almohadillas t茅rmicas Mike Scott Astros Jersey , toallas calientes y se revive el dolor mediante la aplicaci贸n estiramiento marcas de gel. Sin embargo, menos irritaci贸n es uno de los beneficios m谩s importantes de la l谩mpara de calor infrarrojo.

Beneficios del uso de la l谩mpara de calor infrarrojo


Heal y relajarse:


L谩mpara de calor infrarrojo utiliza menos energ铆a y directamente calentar su cuerpo utilizando rayos infrarrojos naturales que se transforma en energ铆a. Este olas de calor se adentra en el cuerpo humano, suavemente levante temperatura de la superficie del cuerpo y sus arranques activan las funciones del cuerpo. Verdaderamente la terapia de calor infrarrojo es una atenci贸n m茅dica de vanguardia para muchas enfermedades leves que ha sido parte de la medicina oriental. El tratamiento ha demostrado con 茅xito para reducir el alivio del dolor, tensi贸n muscular, aumentar la circulaci贸n sangu铆nea y el suministro de ox铆geno a da帽ar los tejidos y reducir la presi贸n up your Calories:


En la vida moderna del mundo se ha convertido llena de estr茅s. La terapia de calor infrarrojo a mantener una forma conveniente para quemar muchas calor铆as Jose Cruz Astros Jersey , desintoxicaci贸n y tienen muchos otros beneficios de hacer ejercicio en un tiempo corto. Despu茅s de una terapia 3O minutos su cuerpo se sentir谩 relajado y el que beneficiar谩 a todo el d铆a.

La pr谩ctica del yoga - calentar la terapia de infrarrojos:


Una pr谩ctica regular del yoga con la terapia de calor infrarrojo para 2-3 veces a la semana es un procedimiento por haber mejorado la salud y el bienestar. Tenga en mente disfrutar de una sesi贸n de sauna antes de ir a la siguiente clase. Esto ayudar谩 a su cuerpo a relajarse y empezar profundiza la desintoxicaci贸n que se beneficiar谩, ya que se detiene la sudoraci贸n en la clase d. Wholesale Soccer Jerseys China Wholesale MLB Jerseys From China Wholesale NHL Sports Jerseys Wholesale NFL Sports Jerseys Wholesale Cheap College Jerseys Wholesale NBA Basketball Jerseys Cheap College Basketball Jerseys Cheap Jerseys From China Wholesale NCAA Jerseys Wholesale NBA Jerseys