Screen‐Printed Flexible Bandstop Filter on Polyethylene Terephthalate Substrate Based on Ag Nanoparticles

Abstract

We present a low-power, cost-effective, highly reproducible, and disposable bandstop filter by employing high-throughput screenprinting technology. We apply large-scale printing strategies using silver-nanoparticle-based ink for the metallization of conductive wires to fabricate a bandstop filter on a polyethylene terephthalate (PET) substrate. The filter exhibits an attenuation pole at 4.35 GHz with excellent in-and-out band characteristics. These characteristics reflect a rejection depth that is better than −25 dB with a return loss of −0.75 dB at the normal orientation of the PET substrate. In addition, the filter characteristics are observed at various bending angles (0 ∘ , 10 ∘ , and 20 ∘ ) of the PET substrate with an excellent relative standard deviation of less than 0.5%. These results confirm the accuracy, reproducibility, and independence of the resonance frequency. This screen-printing technology for welldefined nanostructures is more favorable than other complex photolithographic processes because it overcomes signal losses due to uneven surface distributions and thereby reveals a homogeneous distribution. Moreover, the proposed methodology enables incremental steps in the process of producing highly flexible and cost-effective printed-electronic radio devices.

Versatile Molecular Silver Ink Platform for Printed Flexible Electronics

“…As printed electronics evolves, there is also increasing interest in using screen printing to produce features with a higher resolution and pitch to enable production-scale manufacturing of more complex devices such as transistors, frequency-selective surfaces, and low-band-pass filters . Although it is possible to produce fine lines (<100 μm width) on rigid substrates via screen printing, , it remains a challenge to reliably screen print features with line widths <100 μm on plastic substrates in production using traditional screen printing processes without taking extraneous measures such as the use of coated specialty substrates or carrying out surface chemistry on the screen mesh .…”

Preparation of Ag/graphene composite films by three-component spray-spin-spray coating on surface modified PET substrate

“…Additionally, the diffraction peak of pristine PET appeared at 2θ=26°, and the diffraction peak of silver plating on PET also has a peak at 26°, which is the diffraction peak of PET [30]. What is more, it is known that the Bragger diffraction peak of GNS is 26° [31]. Ag/GNS-1, Ag/GNS-3 and Ag/GNS-5 have the same Bragg diffraction peak at about 26°but different intensity.…”

The flexible bandpass filter on polyimide substrate for wireless communications systems

“…In the literature, flexible filters made with other technologies are usually tested only when the filter is bent [17][18][19][20][21][22]. The flexible filter fabricated by self-metallization technology was tested under bending and folding conditions.…”