Inkjet-Printed Interdigital Coupled Line Filter on Liquid Crystal Polymer Substrate

Kao, Hsuan‐Ling; Cho, Cheng-Lin; Chang, Li-Chun

doi:10.1109/led.2013.2285114

Cited by 27 publications

(19 citation statements)

References 8 publications

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“…5(b). A uniformity of the silver film was obtained using 10-pass printing process for radio frequency applications [10]. The circuit size of the bandpass filter was only 4.2 mm × 3 mm × 0.25 mm (length × width × height) excluding the probing pads.…”

Section: Lamination Bonding Pressurementioning

confidence: 99%

“…LCPs have recently been recognized as a favorable material for high-frequency applications, exhibiting a stable dielectric constant, an impressive loss tangent, favorable moisture absorption, low thermal expansion coefficient, and multilayer design capabilities [7][8][9]. Studies [10,11] have demonstrated that employing inkjet printing technology for fabricating LCP substrates. Moreover, inkjet-printed technology is faster and more economical than using additive manufacturing technologies [5,6,12,13].…”

Section: Introductionmentioning

confidence: 99%

“…ULTRALM 3850 liquid crystalline polymer core film and ULTRALAM 3908 bonding film (Rogers Corporation) were used as the main substrate (thickness, 100 μm) and Thin Solid Films xxx (2015) xxx-xxx adhesive layer (thickness, 50 μm), respectively, because according to the manufacturer datasheets they exhibit similar characteristics, such as their thermal expansion and dielectric constants. Silver film was printed onto an LCP substrate to form a metal layer and multilayer LCP lamination bonding process under the following conditions [10]: 1) a 3-W, 5-s plasma polymerization surface treatment was applied. 2) The silver ink was printed onto a core film at 60°C.…”

Section: Introductionmentioning

confidence: 99%

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Inkjet-printed silver film on multilayer liquid crystal polymer for fabricating a miniature stub-loaded bandpass filter

et al. 2015

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Section: Lamination Bonding Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Inkjet-printed silver film on multilayer liquid crystal polymer for fabricating a miniature stub-loaded bandpass filter

et al. 2015

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“…Several studies on the implementation and characterization of inkjet-printed silver film on an LCP substrate have been conducted [12,13]. In our study, the multilayer LCP technology was utilized at high torque forces and a high temperature.…”

Section: Introductionmentioning

confidence: 99%

Inkjet-Printed Interdigital Bandpass Filter with Wide Stopband Using Multilayer Liquid Crystal Polymer Technique

Chang

Cho

Bachani

et al. 2018

International Journal of Antennas and Propagation

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This article presents a two-layer inkjet-printed interdigital bandpass filter using lamination bonding process on liquid crystal polymer (LCP) substrates for radio frequency electronic applications. Various percentages of torque force were applied over a 4 × 4 cm 2 area with a 942 kg fixed force in the lamination bonding process. The insertion loss and surface morphology of the inkjet-printed silver film were examined on various torque forces to develop the lamination bonding process. The lamination bonding was performed at 12% torque and 270°C. A three-dimensional bandpass filter was realized with a S 21 of −2.2 dB at 11.5 GHz with a 17% fractional bandwidth. A multilayer inkjet-printed bandpass filter was successfully developed to verify the design methodology and fabrication of inkjet-printing technology and lamination bonding technique for a three-dimensional integrated circuit package.

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“…Previous distributed filter results have shown inadequate performance, with the insertion loss ranging from 3.6 to 10 dB (Refs. [11][12][13][14][15]. One of the best reports has shown an insertion loss of~0.5 dB at its center frequency (2 GHz), but it utilized inkjet printing along with electroless plating to increase the conductivity and thickness of the metal 16 .…”

Section: Introductionmentioning

confidence: 99%

Fully inkjet-printed microwave passive electronics

2017

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Fully inkjet-printed three-dimensional (3D) objects with integrated metal provide exciting possibilities for on-demand fabrication of radio frequency electronics such as inductors, capacitors, and filters. To date, there have been several reports of printed radio frequency components metallized via the use of plating solutions, sputtering, and low-conductivity pastes. These metallization techniques require rather complex fabrication, and do not provide an easily integrated or versatile process. This work utilizes a novel silver ink cured with a low-cost infrared lamp at only 80°C, and achieves a high conductivity of 1 × 10 7 S m −1. By inkjet printing the infrared-cured silver together with a commercial 3D inkjet ultraviolet-cured acrylic dielectric, a multilayer process is demonstrated. By using a smoothing technique, both the conductive ink and dielectric provide surface roughness values of o500 nm. A radio frequency inductor and capacitor exhibit state-of-the-art quality factors of 8 and 20, respectively, and match well with electromagnetic simulations. These components are implemented in a lumped element radio frequency filter with an impressive insertion loss of 0.8 dB at 1 GHz, proving the utility of the process for sensitive radio frequency applications.

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Inkjet-Printed Interdigital Coupled Line Filter on Liquid Crystal Polymer Substrate

Cited by 27 publications

References 8 publications

Inkjet-printed silver film on multilayer liquid crystal polymer for fabricating a miniature stub-loaded bandpass filter

Inkjet-printed silver film on multilayer liquid crystal polymer for fabricating a miniature stub-loaded bandpass filter

Inkjet-Printed Interdigital Bandpass Filter with Wide Stopband Using Multilayer Liquid Crystal Polymer Technique

Fully inkjet-printed microwave passive electronics

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