Inkjet printing is a printing technology that recreates a digital image by propelling microscopic drops of ink, sprayed by the ink-jet printhead onto a substrate. There are three most common technologies in use in contemporary inkjet printing: air-bubble, piezoelectric and thermal jet. Very small drops (often called Drop-on-Demand (DoD)) are ejected by pulses, generated either thermally or piezoelectrically.
The main requirements for inkjet inks are chemical stability, solubility in conventional solvents, low price and low-temperature processing. The development of colloidal solution for correct ejection of droplets on a targeted area by maintaining an acceptable quality of the printed circuitry is a complex task due to the influence of evaporation rate of the solvents and orientation of the active particles.
Advantages of screen printing
- - relatively low cost;
- - possibility to use ink with lower viscosity for higher penetration into substrate.
Disadvantages of inkjet printing
- - slow speed due to a limited number of nozzles;
- - possibility of expansion;
- - low throughput due to slow speed of inkjet printing;
- - low image resolution in the range of 20-50 μm or more could cause additional problems for the jet system due to the spread of the solution on substrate and chaotic behavior of the ink drops during application.