New Ultrasonic Spray Nozzle Coating System for Biosensor
What is the ultrasonic spray nozzle?
Ultrasonic biosensor spraying is a key technology used in biosensor
fabrication. It uses ultrasound to precisely spray liquid coatings
onto the sensor surface, enhancing sensor performance. The
following is a detailed introduction:
Operating Principle
Ultrasonic spraying technology uses a piezoelectric transducer to
convert high-frequency sound waves into mechanical energy,
atomizing the liquid coating into tiny droplets. These droplets are
then evenly applied to the biosensor substrate surface via a
carrier gas, forming a coating or thin film.
Technical Advantages
High Precision and Uniformity: Parameters such as droplet size,
spray speed, and coating thickness can be precisely controlled to
ensure uniform coating distribution across the biosensor surface,
thereby improving sensor sensitivity and stability.
Clog-Free and High Performance: Ultrasonic spraying evenly
disperses the coating, eliminating the clogging issues that can
occur with traditional spraying. Furthermore, this technology
offers high transmission efficiency, reducing coating waste and
lowering production costs.
Material Compatibility: Ultrasonic spraying is compatible with a
variety of substrates and coatings, including the sensitive
elements and transducer materials commonly used in biosensors. It
can evenly spray onto complex surfaces, meeting the diverse coating
performance requirements of biosensors. Application Scenarios
Protein Detection Sensors: Titanium dioxide nanofibers and gold
nanoparticles are deposited on the electrode surface to enhance the
adsorption capacity and electrochemical activity of biomolecules,
improving sensor sensitivity and detection stability.
Enzyme Sensors: Carbon nanotube and polymer composites are
deposited to improve enzyme stability and response time to target
molecules, extending sensor life.
DNA Sensors: Silver nanoparticles and titanium dioxide nanofibers
are deposited to enhance the conductivity and surface activity of
sensor electrodes, improving the sensitivity and specificity of DNA
sequence detection.
Environmental Pollutant Detectors: Widely used to deposit zinc
oxide nanostructures, they enhance the sensor's sensitivity and
selectivity for heavy metal ions and organic pollutants, enabling
real-time monitoring of environmental pollutants.
What is the parameter of the spray nozzle?
| Item | Wide type | Diffuse type | Bunching type | long nozzle | External fluid supply |
| Diameter of atomized particle | 15-40 | 15-41 | 15-42 | 15-20 | 15-20 |
| Spray width (um) | 40-120 | 40-80 | 2-20 | 1-3 | 0.5-2 |
| spray height (um) | 50-150 | 30-80 | 10-30 | 10-20 | 10-20 |
| Flow (ml/min) | 0.5-20 | 0.5-20 | 0.5-10 | 0.5-10 | 0.01-1 |
| Suitable viscossity (cps) | ＜30 | ＜30 | ＜30 | ＜15 | ＜15 |
| Particle size in liquid (um) | ＜20 | ＜15 | ＜10 | ＜8 | ＜8 |
| Diversion pressure (mpa) | ＜0.05 | ＜0.05 | ＜0.05 | / | / |
Do you have the spray nozzle pictures?
Advantages
Ultrasonic coating of silicon wafers using a painting equipment
involves several steps and principles. Here’s an overview of the
process:
1. Overview of Ultrasonic Coating
Ultrasonic coating utilizes high-frequency sound waves to atomize
liquid photoresist into fine droplets. This technique ensures an
even distribution of the coating material on the wafer surface.
2. Equipment Components
Ultrasonic Transducer: Converts electrical energy into ultrasonic
waves, which create vibrations in the liquid.
Spray Nozzle: Designed to disperse the atomized photoresist onto
the wafer.
Control System: Manages parameters like spray flow rate, frequency,
and coating thickness.
3. Preparation Steps
Wafer Cleaning: Ensure silicon wafers are thoroughly cleaned to
remove contaminants that could affect adhesion.
Photoresist Selection: Choose the appropriate type of photoresist
based on the desired application and specifications.
4. Coating Process
Setup: Position the silicon wafer securely on the coating platform.
Loading Photoresist: Fill the spray gun with the selected
photoresist material.
Ultrasonic Activation: Activate the ultrasonic transducer to
generate high-frequency vibrations.
Spraying: The nozzle sprays the atomized photoresist onto the
wafer. The ultrasonic waves help maintain a consistent droplet size
for uniform coating.
Control Parameters: Adjust settings such as spray angle, distance
from the wafer, and coating speed to achieve the desired thickness
and uniformity.
5. Post-Coating Procedures
Drying: Allow the coated wafer to dry appropriately, either through
natural evaporation or using a hot plate.
Baking: Perform soft baking to remove solvents and improve
adhesion.
Inspection: Check the coated wafer for uniformity and defects.
6. Advantages of Ultrasonic Coating
Uniform Thickness: Ensures consistent coating across the entire
wafer surface.
Reduced Material Waste: Efficient atomization minimizes excess
photoresist usage.
Versatile Applications: Suitable for various photoresist materials
and wafer sizes.
Conclusion
Ultrasonic coating is an effective method for applying photoresist
to silicon wafers, enhancing precision and efficiency in
semiconductor manufacturing and related fields.
How do ultrasonic spray nozzles compare to traditional spray
nozzles in terms of efficiency?
Ultrasonic spray nozzles offer several advantages over traditional
spray nozzles in terms of efficiency. Here are some key points of
comparison:
Atomization Efficiency: Ultrasonic spray nozzles are highly
efficient in atomizing liquids into fine droplets.
Reduced Overspray: Traditional spray nozzles often generate a
significant amount of overspray, which refers to the loss of liquid
that doesn't reach the intended target.
Coating Quality: Ultrasonic spray nozzles are particularly
advantageous in applications where a high-quality coating is
required.
Material Savings: Due to their efficient atomization and reduced
overspray, ultrasonic spray nozzles can help save on material
costs.
Versatility: Ultrasonic spray nozzles can handle a wide range of
liquids, including water-based solutions, solvents, suspensions,
and viscous fluids.
It's worth noting that traditional spray nozzles have their own
advantages in certain scenarios, such as high-flow applications or
situations where larger droplets are desired. The choice between
ultrasonic spray nozzles and traditional spray nozzles depends on
the specific requirements of the application and the desired
outcome in terms of efficiency, coating quality, and material
savings.
Can you provide examples of industries or applications where
ultrasonic spray nozzles are commonly used?
Ultrasonic spraying system
The ultrasonic spraying equipment has self-cleaning, which can
avoid pollution of the inner wall of the blood collection tube
during the spraying process, and can also avoid the contamination
of its own nozzle, and can be sprayed and used in cycles. The
ultrasonic spraying system can program the number, distance,
thickness and other parameters of spraying, so as to ensure the
accuracy of the spraying effect. Ultrasonic spraying equipment can
save raw materials, and the utilization rate of raw materials is as
high as 85%. Industrial ultrasonic atomizers can be easily
retrofitted into existing production lines for efficient spraying
with consistent quality output.
As an industrially proven technology, ultrasonic spraying has been
successfully applied to high-performance thin film coating lines in
the manufacturing of precision electronics such as semiconductors,
precision devices, nanotechnology applications, fuel cells and
solar cells. During ultrasonic spraying, the size and distribution
of droplets can be precisely controlled, resulting in particles
with a high surface area.
Can you provide the working video of the spray nozzle?
