Increased complexity and variability, curing and drying processes, and ink and material consistency are all significant challenges to maintaining printing quality.
FREMONT, CA: As the demand for printed electronics grows, manufacturers have a fundamental challenge: increasing manufacturing efficiency while preserving product quality and cost-effectiveness. To do so successfully, manufacturers must first identify businesses' most prevalent challenges. Then, they can go over solutions to make the transition to greater quantities more seamless and, hence, less costly. . First, let's discuss why manufacturers may experience variable printing quality and what can be done about it.
Maintaining constant printing quality is one of the most pressing issues with increasing printed electronics manufacturing. Variations in the ink deposition, alignment, and curing processes can cause faults and inconsistencies in the finished product as production numbers increase.
Stay ahead of the industry with exclusive feature stories on the top companies, expert insights and the latest news delivered straight to your inbox. Subscribe today.
Major issues of preserving printing quality
Enhanced variability and complexity: As production volume increases, so does the complexity and variability of the printing process. Ink deposition, registration, and curing might vary depending on substrate qualities, environmental circumstances, and equipment factors. These variances can lead to uneven resistance, ink thickness tolerance concerns, and lower overall yields.
Ink and material consistency: The uniformity of conductive inks and other materials is essential for producing reliable printed electronics. Changes in ink viscosity, particle size, and composition can result in electrical characteristics, affecting printed circuit performance. Adequate substrate thickness and overall dimensions are also important. Many substrates are pre-treated to "bake-in" shrinkage before going into production.
Screen printing and screen maintenance: In high-volume production, printing equipment wears down faster and requires more frequent monitoring. Over time, this can cause issues such as irregular squeegee pressure, circuit misalignment, static-induced feeding problems, early screen damage, and general cosmetic flaws. Regular maintenance becomes necessary to provide constant printing quality, reducing downtime and operational expenses.
Curing and drying procedures: Proper curing or drying of printed layers is required to obtain the necessary electrical and mechanical characteristics. Scaling up production may necessitate changes to curing procedures, affecting the consistency of curing across vast substrates or continuous rolls. The dwell period (duration and temperature) can limit quicker throughput, particularly when a thicker ink laydown is required. The substrate only allows for a limited increase in temperature. Time is restricted by the tunnel oven's length and belt speed.
Alignment and registration challenges: Accurate alignment and registration of several ink layers is essential for multi-layer printed electronic devices. As production goes up, maintaining proper registration becomes increasingly difficult, particularly when working with flexible substrates or elaborate designs.
