Ink-Jet Printing Technology for Application to Wireless Communication Systems [Application Notes]

As the field of wireless communication systems grows, the functionality of devices also continues to grow. Emerging research into wireless communication systems, with operating frequencies ranging from tens to hundreds of gigahertz, is leading to the development of gigabit wireless local area networks and automotive collision avoidance, to name two. Common manufacturing methods for millimeter-wave (mm-wave) antennas include etching (photolithography) and screen printing, which suffer from the use of harsh chemicals, high manufacturing costs, and complex manufacturing processes. The development of mm-wave devices requires effort to improve the versatility and cost of manufacturing. Ink-jet printing is attracting attention as a technology that has these characteristics. Ink-jet printing technology is an additive manufacturing process method that is attracting attention in the industry due to its advantages as a straightforward process with low cost, excellent scalability, and environmental friendliness compared to general laminate-based manufacturing methods [1]. The advantages and disadvantages of ink-jet printing compared to other printing technologies are reviewed in Table 1.