Ultrasonic Spray Coating Machine for Nano-Silver Conductive Ink

Ultrasonic Spray Coating Machine for Nano-Silver Conductive Ink

With the rapid rise of industries such as flexible electronics, semiconductor packaging, smart sensing, and RFID antennas, nano-silver conductive ink, as a high-performance functional conductive material, has become a core consumable in printed electronics technology due to the excellent conductivity, oxidation resistance, and low-temperature sintering characteristics of nano-silver particles. It is widely used in the preparation of products such as flexible circuit boards, electronic skin, sensor electrodes, and transparent conductive films. Nano-silver conductive ink uses 20-50nm spherical nano-silver particles as the core conductive filler, combined with solvents, dispersants, stabilizers, and additives. The silver content is typically 10%-30% (mass fraction). Its conductivity, coating adhesion, and film uniformity directly depend on the precision and adaptability of the spraying process. Cheersonic ultrasonic spray coating machines, with their core advantages of high precision, low damage, and high adaptability, perfectly meet the spraying requirements of nano-silver conductive ink, overcoming its pain points of easy agglomeration and high material cost, providing core equipment support for its large-scale, high-quality mass production.

The unique properties of nano-silver conductive ink impose extremely stringent requirements on the spraying process, as its film quality is deeply intertwined with its conductivity. The core spraying steps for this ink include conductive layer coating, patterned spraying, and reinforcing layer coating. The coating thickness needs to be precisely controlled within 0.05-0.8μm. The core spraying requirements focus on three main aspects: First, high uniformity coating, requiring precise control of coating thickness and distribution with a deviation ≤ ±0.02μm and uniformity exceeding 99%. Defects such as pinholes, bubbles, and particle agglomeration must be avoided to ensure uniform dispersion of nano-silver particles, forming a dense conductive network, guaranteeing stable conductivity, and adapting to the needs of flexible electronic fine circuits. Second, low-damage adaptation, as nano-silver particles are prone to agglomeration and are sensitive to temperature. The substrates for spraying are mostly flexible materials such as PET and PI, or silicon substrates. The spraying process requires low pressure and temperature control throughout to avoid particle agglomeration or substrate deformation caused by high-pressure impact. Simultaneously, it must ensure strong adhesion between the coating and the substrate, preventing cracking or peeling after bending and high-temperature sintering. Thirdly, it must possess high cleanliness and compatibility, meeting Class 100 cleanroom standards to eliminate micro-dust contamination and avoid interfering with conductivity. It must also be compatible with nano-silver conductive inks of different viscosities (1-15 cps), allowing for seamless coating of curved surfaces, micro-gaps, and large areas, meeting the fabrication needs of flexible electronics, semiconductors, and other fields.

Currently, in the field of nano-silver conductive ink spraying, traditional spraying processes (air spraying, spin coating, inkjet printing) have many shortcomings, making it difficult to adapt to its characteristics and the needs of large-scale mass production, becoming a bottleneck restricting the industry’s quality and efficiency improvement. Air spraying relies on high-pressure airflow, which easily leads to uneven droplet distribution and particle agglomeration. High-pressure impact can also damage flexible substrates, introduce impurities, and result in a material utilization rate of only 20%-35%, significantly wasting expensive nano-silver materials. Spin coating has a material utilization rate of less than 30%, and high-speed rotation easily generates stress, causing streaks and edge buildup in the coating. It is also difficult to adapt to flexible substrates and complex patterns. Inkjet printing requires extremely high ink viscosity, easily causing nozzle clogging and is inefficient, unable to meet the needs of large-scale mass production. It is also prone to particle agglomeration, affecting conductivity.

Cheersonic ultrasonic spraying machines address the characteristics and spraying pain points of nano-silver conductive inks. Leveraging high-frequency atomization technology and combining it with key aspects of printed electronics manufacturing processes, they create customized solutions, completely breaking through the bottlenecks of traditional processes. The equipment converts industrial frequency electricity into a 40-150kHz high-frequency electrical signal via an ultrasonic generator. This signal is then converted into high-frequency mechanical vibration by a piezoelectric ceramic transducer. Utilizing the ultrasonic cavitation effect, the nano-silver conductive ink is atomized into fine droplets of 0.01-2 microns. This effectively deagglomerates the nano-silver particles in the ink, precisely controlling the solvent evaporation rate to ensure uniform dispersion of the nano-silver particles, forming a dense and uniform conductive coating. This perfectly matches the high conductivity and easy agglomeration characteristics of nano-silver conductive ink, helping to improve the coating’s conductivity and stability. The atomization process is conducted under low pressure and temperature control throughout. The droplets are gently deposited on the substrate surface and in tiny gaps, guided only by a small amount of carrier gas. There is no mechanical contact or high-pressure impact, preventing particle agglomeration or substrate damage. Spraying parameters can be flexibly adjusted to adapt to nano-silver conductive inks of different viscosities and silver contents, and it is compatible with automated large-scale production lines.

For the spraying needs of nano-silver conductive ink, Cheersonic ultrasonic spraying machines exhibit four core advantages, helping companies achieve efficient mass production, improved quality, and reduced costs. First, ultra-precise and uniform coating, achieving a coating uniformity of over 99% and a thickness deviation of ≤±1%, effectively solves problems such as particle agglomeration and uneven coating, ensuring the density of the conductive network, improving conductivity, and meeting the needs of fine circuit and transparent conductive film preparation.
Second, low-damage protection, using low-pressure gentle atomization technology, avoids agglomeration of nano-silver particles and damage to the substrate, balancing coating adhesion and conductivity, reducing defects in subsequent sintering and bending processes, and improving product yield.
Third, high material utilization, reaching over 95%, significantly reduces waste of expensive nano-silver materials, lowers preparation costs, and meets the economic needs of large-scale industrial production.
Fourth, excellent mass production adaptability, supporting automated continuous spraying and cleanroom adaptation, seamlessly integrating into large-scale nano-silver conductive ink spraying production lines, adapting to curved surfaces, large areas, and complex pattern coating, overcoming the problems of low efficiency, high loss, and poor consistency of traditional processes.

Currently, Cheersonic ultrasonic spraying machines are widely used in nano-silver conductive ink spraying applications, covering core products such as flexible circuit boards, electronic skin, sensor electrodes, RFID antennas, and transparent conductive films. They are compatible with core fields such as flexible electronics, semiconductor packaging, and intelligent sensing, helping companies solve problems such as material waste, poor conductivity, and low yield caused by traditional spraying processes, achieving high-quality and large-scale breakthroughs in nano-silver conductive ink spraying. As a leading company in the field of ultrasonic electronic equipment, Cheersonic Ultrasonic has been deeply involved in conductive ink spraying for many years, closely following the trend of nano-silver conductive ink development towards low cost, high stability, and high conductivity. It can provide customized spraying solutions, covering the entire process from equipment selection and process parameter optimization to ink adaptation, helping customers fully leverage the core advantages of nano-silver conductive ink.

In the future, Cheersonic Ultrasonic will continue to optimize equipment performance to meet the upgrading needs of the flexible electronics and semiconductor industries, injecting strong momentum into the high-quality development of the printed electronics industry.

About Cheersonic

Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.

Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.

If you have any technical questions, customization demands, or procurement inquiries about ultrasonic atomization nozzles, feel free to contact our professional sales and technical team for detailed parameters, customized solutions, and industry application support.
Email: market2@cheersonic.com