Shenzhen Zain Technology: Why COB is the inevitable choice for the development of micro-pitch
With the penetration of Mini LED technology, its track has realized the extension from outdoor large screens to high-end commercial and consumer-grade displays. And product upgrades and iterations in these fields have prompted a soaring demand for Mini LED technology, especially intensifying the LED display industry’s attention to packaging methods.
At present, in the packaging process, there are many different technical routes such as SMD, COB, and IMD. The SMD package has the advantages of mature and stable technology, low manufacturing cost, good heat dissipation effect, and convenient maintenance. It is still the mainstream solution of traditional small spacing.
However, from the perspective of industrial development, the SMD single lamp form below P1.0 will face problems such as reliability, cost, resolution, graininess, and other display effects; the IMD process chain is long and complicated, and it is difficult to miniaturize the continuous spacing.
Serial light is serious, etc.; the advantages of using integrated COB packaging form in small pitches are gradually shown, and integrated packaging COB has higher requirements on product design, process, and material accuracy.
First of all, in the COB printing process, the solder pins of the Mini LED chip are smaller than those of the SMD lamp beads, and the density of the micro-pitch is higher, which requires the design of senior engineers; the requirements for stencil printing and solder paste are relatively high during production.
Second, in the die bonding process, the smaller the size of the Mini LED chip, the greater the impact of the die bonding action offset and the PCB pad position offset on the die bonding yield, so the importance of the die bonding equipment is reflected.
The consistency of the display is improved by the route selection of the back-end process of the COB integrated packaging method; finally, how to ensure the success rate and rapidity of on-site installation has always been a pain point in the industry, and how to solve it from the research and development design.
The above issues have become the direction of thinking of the industry, especially under the background of the penetration of spacing miniaturization, it is more urgent. So, what technological and technological innovations does COB technology need to complete in order to stand out in the competition from small pitches to the era of micro pitches?
In recent research activities, Shenzhen Zain Technology introduced COB technology that integrates the midstream packaging and downstream display technologies of the LED industry, which saves the cost of brackets and some manufacturing links, resulting in higher production efficiency.
“And the smaller the dot pitch, the more obvious the comprehensive cost advantage of COB products. P1.2 products produced by COB technology and SMD technology are equivalent in cost. When the dot pitch is smaller than P1.2, the comprehensive manufacturing cost of COB technology is low. on SMD technology.”
“In the coming days, COB technology development direction will be the trend of LED display towards the development of micro-pitch technology.
In addition, for the Mini LED four-in-one technology, Shenzhen Zain Technology believes that the Mini LED four-in-one technology is still an SMD patch technology in essence, and it cannot completely solve the technical and process problems when moving towards a smaller spacing. It is a transition product between SMD and COB packaging technology.
In addition to the advantages of process and cost, COB products have better performance, with high protection, high reliability, high contrast, low energy consumption, wide color gamut and other advantages.
“The dead pixel rate in the life cycle of COB products is nearly an order of magnitude lower than that of SMD products, which is more suitable for the needs of ultra-high-definition smart displays in the 5G era and has a differentiated advantage in small-pitch displays.”
In 2018, as everyone knows, Samsung took the lead in launching the “The Wall” series of Micro LED commercial displays below P1 and continued to update and iterate.
In 2021, the new The Wall will be launched, targeting middle and high-level meeting scenarios, command scheduling, and monitoring, creative display, simulation, industrial design, high-end cinema, cultural tourism, and many other industries.
Support HDR10/HDR10+/LED HDR image optimization technology can dynamically adjust color and contrast so that full and delicate image color can be accurately presented; adopt modular design method, you can change the size and shape arbitrarily, to meet the requirements of hanging, curved surface, inner and outer right angle, ground Facade and other special-shaped creative installation.
At present, Shenzhen Zain Technology has a full range of ultra-high-definition Micro LED display products based on flip-chip COB technology, including Win COB Series 1.2/0.9 mm, and all of them have achieved mass production, which is widely used in security, monitoring, command, dispatch, Professional display markets such as data centers, as well as commercial markets such as broadcasting, media, conferences, exhibitions, and cinemas.
Shenzhen Zain Technology said that in the future, as the cost continues to decline, it is expected to enter the trillion-level home display market such as e-sports games and home theaters.
During the research activities, Shenzhen Zain Technology also introduced topics such as overseas business situations and rising raw materials that investors are concerned about.
Regarding overseas business, Shenzhen Zain Technology said that the overseas market is gradually recovering. As the epidemic is gradually brought under control and the global economy begins to recover, suspended cultural and entertainment, sports events, business, and other activities will be carried out normally, driving the development of the LED display industry;
On the other hand, with the global development of remote conferences, smart cities, and big data, The company’s ultra-high-definition Micro LED display products based on COB technology will penetrate the indoor ultra-high-definition display market such as overseas high-end conference displays, big data centers, monitoring and command centers, and the market space is expected to open up quickly.”
