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Multi-layer Roll-on-stack Flexible Electronic Film Can Reduce Equipment Footprint

The Development of 3D Roll Film Comes Out

Electronic filters are vital to the inner workings of our phones and other wireless devices. They eliminate or enhance a specific input signal to achieve the desired output signal, which is essential, but it will take up the chip space that researchers are constantly seeking to shrink. A new study shows that the various components that make up the electronic filter have been successfully integrated into a single component, thereby greatly reducing the space occupied by the device.
Researchers at the University of Illinois at Urbana-Champaign abandoned the traditional 2D on-chip lumped or distributed filter network design. The design consists of separate inductors and capacitors for space-saving 3D roll film. Both design elements are included independently.

Research Process of Multilayer Electronic Film

An image of an electron microscope consisting of a series of new chip components integrating inductors (blue) and capacitors (yellow), which are used to make electronic signal filters in phones and other wireless devices.
"With the success of our team on wound inductors and capacitors, it makes sense to use the 2D to 3D self-assembly characteristics of this manufacturing process to integrate these different components into a self-winding package. Savings Space installation," Li said.
In the laboratory, the team used specialized etching and photolithography processes to print two-dimensional circuit patterns onto a very thin film. In circuits, they connect capacitors and inductors and ground or signal lines together, all on a plane. The researchers say that the multilayer film can then be rolled into a thin tube and placed on a chip.
The device manufacturing process includes the deposition of metal by electron beam evaporation and photolithography to define the metal pattern and the etching process. Then, the final etching step triggers the self-winding process of the stacked film.

A Whole New Level of New Filters

The researchers said that the team tested the performance of rolled parts and found that under the current design, the filter is suitable for applications in the frequency range of 1-10 GHz. Although the design goal is to be used in radio frequency communication systems, the team believes that based on past research, they can also achieve other frequencies, including the megahertz range, to achieve high-power inductors.
Graduate student and lead author Mike Young said: "We used several simple filter designs, but in theory, we can use the same processing steps to combine any filter network." We use what already exists to provide A new and easier platform that integrates these components more closely than ever before. "
He said: "The way we monolithically integrate inductors and capacitors can increase the integration of passive electronic circuits to a whole new level." "In fact, the complex circuits that can be manufactured in this way with a mask set There are no restrictions on sex or configuration."

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