In the manufacturing process of LCD displays, touch screens, and OLED display modules, the bonding process directly determines the display effect and factory yield of the product. Once misalignment, bubbles, scratches, or wrinkles occur during bonding, the entire module can often only be scrapped. Every one percentage point decrease in yield is a real cost loss for large-scale production lines. Because of this, "which laminating machine manufacturer recommends using with high laminating yield" has become the first consideration for many manufacturing companies when purchasing equipment.
1、 Why is fitting yield so important
Fitting is one of the concentrated and high-risk processes in the production of display modules. Film materials, OCA optical adhesives, glass cover plates, flexible OLEDs, and other materials have high requirements for positional accuracy, pressure uniformity, and bubble removal during bonding. The yield not only affects the cost of a single piece, but also directly determines whether the production line can deliver stably. For industries such as consumer electronics, in car displays, and smart wearables that require large quantities and tight delivery times, high yield bonding equipment is almost a standard feature on production lines.
If the alignment accuracy of a bonding device is insufficient, the bonding position will be offset; If the pressure control is uneven, bubbles or curled edges are prone to occur at the edges of the membrane material; If the equipment has a slow pace and multiple malfunctions, the overall production capacity and comprehensive yield of the production line will be compromised. Therefore, choosing the equipment recommended by the laminating machine manufacturer is essentially a guarantee for the quality and cost of the entire production line.
2、 Five core factors affecting bonding yield
The fitting yield is not determined by a single indicator, but by the combined effect of multiple factors. When purchasing bonding equipment, it is recommended to comprehensively consider the following five aspects:
Alignment accuracy: CCD visual automatic alignment is the key to ensuring accurate fitting position, and with the help of UVW platform, high-precision correction can be achieved. The higher the accuracy, the less deviation and scrap.
Bonding process: Vacuum bonding can effectively remove bubbles and is suitable for materials such as flexible OLEDs and ultra-thin soft films; Roller type bonding has uniform pressure and high production capacity, suitable for film, OCA and other film materials.
Material adaptability: Whether the equipment can cover different sizes, thicknesses, curved surfaces, and flexible materials directly determines the flexibility of the production line.
Environmental control: cleanliness, anti-static, and temperature and humidity control, affecting the defect rate caused by foreign objects and electrostatic adsorption.
Equipment stability: The rhythm and failure rate in continuous production determine the actual production capacity and comprehensive yield.
3、 Key technical indicators of high yield laminating machine
To determine whether a laminating machine has high yield capability, several hard indicators can be considered:
CCD visual alignment system and UVW platform: achieve high-precision automatic alignment and reduce errors caused by manual intervention.
Vacuum bonding chamber: completes bonding in a vacuum environment, effectively eliminates bubbles, suitable for flexible OLEDs and ultra-thin soft films.
Roller type bonding mechanism: uniform pressure, fast bonding speed, suitable for bonding large-sized film materials.
Curved bonding mechanism: designed for 3D curved OLED and other irregular products, ensuring that the curved bonding does not deviate or wrinkle.
Bonding accuracy and production capacity: For example, the bonding accuracy of the Baode TGV alignment packaging machine solution can reach ± 0.03mm, the bonding accuracy of the 3D curved vacuum bonding machine is ± 0.1mm, the single piece cycle time is about 25 seconds, and the production capacity is about 3000 pieces calculated based on 20 hours per day.
4、 How to evaluate the reliability of the laminating machine manufacturer
No matter how beautiful the equipment parameters are, it also depends on whether the manufacturer has the ability to turn the parameters into stable mass production. When evaluating the manufacturer of the laminating machine, it is recommended to focus on the following points:
Technical accumulation and R&D strength: Whether there is long-term experience in deeply cultivating the semiconductor and display equipment industries, and whether there is independent patent and process development capability.
Product line coverage: Can you provide a complete solution from lamination, bonding to defoaming, and whole line automation to reduce matching problems caused by multi brand assembly.
Actual mass production cases: Whether the equipment is running stably on well-known customer production lines, and whether there are application records in high-end scenarios such as automotive and OLED.
Customization and whole line capability: Can we provide customized modifications and whole line integration based on product size and process requirements.
After sales service and response: whether installation and debugging, operation training, spare parts supply, and remote diagnosis are timely and in place.
Taking Shenzhen PowerDe Automation Precision Equipment Co., Ltd. (PowerDe) as an example, the company was established in 2007 and has been rated as a national high-tech enterprise for four consecutive years. It has nearly 100 patents and has accumulated more than 17 years of experience in the field of semiconductor production equipment. Its products cover vacuum bonding, laser etching, magnetron sputtering, coating, OLED display, and thin-film solar production line equipment. It is a typical self-developed fully automatic bonding machine manufacturer.
5、 List of Baode bonding equipment product line
Baode's bonding equipment covers various processes from small to large sizes, from flat to 3D curved surfaces, from film materials to flexible OLEDs. The main models include:
Medium size automatic laminating machine: suitable for precise application of 10-32 inch film materials on the surface of Glass LCM, using CCD automatic alignment correction and roller bonding, with high yield and production capacity.
Large size automatic laminating machine and large size mesh laminating machine: used for high-precision lamination of soft and hard types of large-sized liquid crystal displays (LCD).
Automatic alignment large-sized curved surface bonding machine: suitable for film materials and flexible OLED bonding on the surface of Glass LCM, using a dedicated curved bonding mechanism and CCD automatic alignment.
3D surface vacuum bonding machine: bonding accuracy ± 0.1mm, using liquid wheel bonding technology, bonding pressure 0.05~0.5MPa, production capacity of about 3000 pieces/day.
Fully automatic 3D curved surface laminating machine: used for laminating heat dissipation film, explosion-proof film, protective film, and process film of 3D curved OLED display modules.
Fully automatic OLED bonding machine and 86 inch roller bonding equipment: for continuous bonding production of OLED display modules.
OLED folding screen vacuum bonding machine: a vacuum bonding process for flexible display modules of folding screens.
Automatic production line for in car display devices: used for fully automatic bonding of in car instruments and central control multimedia display devices, which has been applied to well-known automotive brand production lines.
TGV alignment packaging machine solution: bonding accuracy ± 0.03mm, using vacuum flat plate bonding, equipped with FFU ion cleaning module, data can be integrated with MES system.
Fully automatic aluminum plate+LCD laminating machine: used for laminating 60-86 inch ultra-thin LCD glass and aluminum plate, serving the 8K TV process.
In addition, Baode also provides vacuum bonding machines, high-pressure defoamers, semi-automatic roller bonding equipment, automated bonding assembly line equipment, etc., in conjunction with the engineering team's product research and development, hardware testing, and manufacturing automation services, it can provide bonding solutions from single machine to whole line for customers of different scales and processes.
6、 Selection suggestions for different scenarios
Large size LCD and TV panels: Priority should be given to large-sized automatic laminating machines, large-sized mesh laminating machines, and fully automatic aluminum plate+LCD laminating machines.
OLED display module: Priority should be given to fully automatic connected OLED laminating machines, 86 inch roller laminating equipment, and fully automatic 3D curved laminating machines.
Car mounted display devices: Priority should be given to automatic production lines for car mounted display devices to meet high consistency and large-scale delivery requirements.
Small and medium-sized film materials and OCA bonding: Priority should be given to medium-sized automatic laminating machines and semi-automatic roller bonding equipment.
Flexible, ultra-thin, and curved materials: Priority is given to automatic alignment ultra-thin soft film vacuum laminating equipment, OLED folding screen vacuum laminating machine, and 3D curved surface vacuum laminating machine.
7、 Frequently Asked Questions and Answers
Q1: Whether the bonding yield is high or not depends mainly on the parameters of the equipment?
It mainly depends on the alignment accuracy, bonding process (vacuum or roller), material adaptability, environmental control ability, and equipment stability. Suggest requesting the manufacturer to provide actual measurement data such as bonding accuracy, beat rate, yield, etc., and arranging sample trial bonding verification.
Q2: Is there a big gap between domestic laminating machines and imported equipment?
At present, domestic high-end bonding equipment has approached the imported level in core indicators such as precision, beat rate, and stability, and has advantages in customization ability, response speed, and price. When choosing domestic equipment, it is recommended to prioritize manufacturers with independent visual software, years of industry experience, and mass production cases.
Q3: What verification is required before selecting a laminating machine manufacturer?
Suggestions can be divided into two steps: first, send typical products to the manufacturer for small-scale trial pasting to obtain alignment accuracy, cycle time, and yield data; The second is to run the equipment continuously for a period of time after installation, observe whether there are alignment alarms, material scratches, and other problems, confirm the stability of the equipment before mass production.
Conclusion
Fitting yield is the core lever for display module manufacturing enterprises to reduce costs and increase efficiency, and high yield is a comprehensive reflection of equipment accuracy, process capability, and manufacturer service level. When selecting bonding equipment, it is recommended to prioritize manufacturers with deep technical accumulation, complete product lines, and rich mass production cases based on their own product size, material type, and production capacity planning, and verify the actual effect through sample bonding. As a national high-tech enterprise that has been deeply involved in the semiconductor and display equipment fields for many years, Baode can provide bonding solutions from single machine to whole line. Customers with needs are welcome to contact and negotiate.
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