Advantages And Disadvantages Of COB Technology

COB(Chip-on-board), also known as Chip direct mount technology, refers to the bare chip is directly pasted on the printed circuit Board, and then the lead bonding, and then the chip and the lead wrapped with organic adhesive protection process. Compared with the conventional process, the packaging density is high and the process is simple. cob small pitch, is a general term for the point pitch below 1.0, because the SMD package led display is difficult to break through the pitch below 1.0mm, so there is cob. The difference between cob and SMD is that the cob packaging process is simple, without too many restrictions, and the spacing can be smaller; SMD packages are limited by physical limitations and cannot be implemented with smaller pitches.

Advantages of COB technology

1. Better Performance:

The use of cob technology, the chip bare die directly bound to the pcb board, eliminating the lead bonding connection requirements to increase the input/output (/0) connection density, product performance is more reliable and stable.

2.Higher Integration:

The use of cob technology, eliminate the link between the chip and the application circuit board pin, improve the integration of the product.

3.Smaller Volume:

 The use of cob technology, because it can be bound and mounted on both sides of the pcb, the volume of the cob application module is reduced accordingly, and the application space of the cob module is expanded.

4.Stronger Ease Of Use, More Simplified Product Process:

 the use of advanced cluster bus technology, the use of pins between the cob board and the application board is convenient to interconnect, eliminating the use of chips must go through the welding process, reducing the difficulty of product use, simplifying the product process, while making the product easier to replace, enhance the product ease of use

5.Lower Cost :

cob technology is directly on the pcb board for binding packaging, eliminating the chip need to plant balls, welding and other processing costs, and the design of the user board is more simple, only need a single layer board can be realized, effectively reducing the cost of embedded products

What's Good About The COB Display?

1.Good Quality:

high strength collision resistance, do not worry about bumps and bumps during transportation, load-bearing capacity is 5 times that of SMD packaging led display; IP65 high protection level, can cope with a variety of environmental erosion (water fog tide, oxidation, lightning fire...) ;

2.YOU Show The Display Screen: 

no SMT, patch and other steps of the influence, there is no excess physical barrier between the lamp and the lamp, the spacing is smaller; More pixels per unit area, more refined picture, more saturated color, better picture texture. Plus "surface light source" light, effectively inhibit moire, reduce light refraction, higher degree of color aggregation;

3.Excellent Performance:

compared with SMD packaging led display, cob display production steps are fewer, each reduction of a process, product reliability will be stronger; Secondly, the cob packaging process is to directly package the light-emitting chip on the PCB board, and the heat is directly diffused out through the board, and the heat dissipation ability is better and stronger. cob display has lower energy consumption, 30% less energy consumption than led small pitch;

What Are The Advantages And Disadvantages Of SMD And COB?

For Led display, COB and SMD are a packaging method, COB is the direct packaging of the light-emitting chip on the PCB board, and SMD refers to the table sticker. Both of these displays have their own advantages and disadvantages:

led display in SMD package

1.do SMD do not do smaller spacing to make the picture clearer.

2.surface light source can do high refresh rate ≥7680Hz for a long time without eye damage,

3.good heat dissipation capacity, Heat directly through the PCB board quickly out.

4.large Angle 170°9, -40° -80 °C can be used normally.

5.good heat dissipation and long life (more than 10 years)6 super energy saving than SMD energy saving more than 60% can choose a common Yin and Yang drive mode.

Disadvantages :

1, the price is high 2, the box size is not much

In its current form, cob display has not been well popularized in large part because of the transition from SMD packaging, the original equipment will be wasted, and cob technology is very different for enterprises. Shenzhen Hangxian Optoelectronics has its own set of production technology, with a large amount of transfer technology, gray correction technology, making cob display products high yield.

About Milestrong Service

About Milestrong Service Milestrong Display Co. Ltd. customizes various types of LED digital display, Flexible LED Screen,Interactive LED Floors,Holographic LED Screen ,Immersive LED Displays,creative LED displays etc,our company has a relatively complete production chain and professional technicians, engaged in indoor and outdoor and other display production. After obtaining the design scheme from the customer, we provide one-stop service, customize the finished product of the scheme, deliver it to the customer, and provide good after-sales service

If you want to know more details about sphere led display, please do not hesitate to contact us! Be sure to follow us on LinkedIn and Youtube channel to get the latest news, information and all our new technology solutions