Recently, German and Canadian researchers used 3D printing to develop new resistive memory (ReRAM) devices that use their resistance state to represent binary information.
As society has evolved, the need to reduce the size of storage devices is becoming stronger. Now a group of researchers at the University of Applied Sciences in Munich, Germany and INRS-EMT in Canada have developed an inkjet 3D printing technology that can be used to make compact, flexible resistive memory devices for mass production of printable electronics.
It is reported that in a research paper published in Applied Physics Letters, researchers put forward the concept of resistive memory device for mass-produced printable electronic products. Bernhard Huber, doctoral student at INRS-EMT, said that "the principle of this group of ReRAMs is simple: in any kind of memory, a basic memory cell must switch between two states that represent a bit, or a '0' or '1' For ReRAM devices, these two states are defined by the resistance of the memory cell. "
Researchers use a storage device known as Conductive Bridge Random Access (CB-RAM). For their 3D printing configuration, Huber explained that "0 is a high resistance state of insulating spin-on glass, which separates the conductive polymer electrode from the silver electrode," and 1 is' the resistance state is made of a wire whose Connected to the spin-on glass and provided a reversible short between two electrodes'. "
In a process similar to office inkjet printing, researchers can print functional inks to create capacitor structures (conductor-insulator conductors) only when different print materials are used. Although the printing process is relatively familiar, the researchers say their work can have a big impact and may prove useful in the field of low-performance memory devices.
Christina Schindler of Munich University of Applied Sciences said: "We not only proved that a complete 3D printing process is feasible, but also that performance parameters are comparable to those of cleanroom-made devices. The greatest technical attraction is the mechanical flexibility of our memory tiles and All the materials needed for machining are available on the market, and from our proof of concept we are paving the way for optimization. "
Researchers believe the new 3D printing methods they use to create resistive memory devices may have some practical applications. These include components that make computer chips for credit cards and wearable electronics, such as smartwatches.
Andreas Ruediger of INRS-EMT added: "On-demand printing of electronics is another area of ​​application where the primary source for general-purpose electronics is the Field Programmable Array, which provides a reconfigurable circuit that can be used Predetermined limits for different purposes. "
In addition, researchers believe that printers dedicated to this task may eventually pave the way for easy-to-produce, flexible printed electronics, as current inkjet printers do.
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