LDS manufacturing technology for next generation radio frequency applications

Friedrich, Aline; Geck, Bernd; Malte, Fengler

doi:10.1109/icmid.2016.7738939

Cited by 11 publications

(7 citation statements)

References 7 publications

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“…Therefore, the cost of the material limits the further expansion of the technology to the automotive and consumer goods sectors. In addition, a high required concentration of metal–organic additives reduces mechanical properties of a moulded part—moreover, metal-based additives in the polymer matrix shield electromagnetic radiation and limit MID application in the gigahertz frequency range [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Laser-Induced Selective Electroless Plating on PC/ABS Polymer: Minimisation of Thermal Effects for Supreme Processing Speed

et al. 2020

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The selective surface activation induced by laser (SSAIL) for electroless copper deposition on Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS) blend is one of the promising techniques of electric circuit formation on free-shape dielectric surfaces, which broadens capabilities of 3D microscopic integrated devices (3D-MIDs). The process consists of laser excitation, chemical activation of laser-excited areas by dipping in a liquid and electroless copper deposition of the laser-treated areas. The limiting factor in increasing throughput of the technology is a laser activation step. Laser writing is performed by modern galvanometric scanners which reach the scanning speed of several meters per second. However, adverse thermal effects on PC/ABS polymer surface abridge the high-speed laser writing. In this work, an investigation was conducted on how these thermal effects limit surface activation for selective metal deposition from the view of physics and chemistry. An advanced laser beam scanning technique of interlacing with precise accuracy and the pulse-on-demand technique was applied to overcome mentioned problems for fast laser writing. Initially, the modelling of transient heat conduction was performed. The results revealed a significant reduction in heat accumulation. Applied methods of laser writing allowed the overall processing rate to increase by up to 2.4 times. Surface morphology was investigated by a scanning electron microscope. Energy-dispersive X-ray spectroscopy was used to investigate the modification of atomic concentration on the surface after laser treatment. Experiments did not show a correlation between surface morphology and electroless plating on laser-treated areas. However, significant variation in the composition of the material was revealed depending on the surface activity for electroless plating.

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Section: Introductionmentioning

confidence: 99%

Laser-Induced Selective Electroless Plating on PC/ABS Polymer: Minimisation of Thermal Effects for Supreme Processing Speed

et al. 2020

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“…One important advantage of the LDS technique is that it makes it possible to obtain thick and robust metallization by chemical electroless deposition. The downside is the high degree of surface roughness, due to the action of the laser beam during activation [16,17]. Metal was deposited using commercial electroless solutions of copper, nickel, then gold.…”

Section: Simulations and Resultsmentioning

confidence: 99%

LDS Realization of High-Q SIW Millimeter Wave Filters with Cyclo-Olefin Polymers

et al. 2018

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In this paper, we present narrow-band substrate integrated waveguide (SIW) millimeter wave band-pass filters, designed using cyclo-olefin polymers (COP). The structures were molded, drilled, and metalized with a laser direct structuring (LDS) process. COP are a type of thermoplastic with low dielectric losses in the millimeter waveband, typically 7.5 × 10−4 at 40 GHz for the COP RS420-LDS from Zeon®. The body of the filter was realized using a molding process that facilitates the combination of thin 50 Ω microstrip access lines with high thickness microwave cavities through 3D transitions, thus making high quality factors attainable. The simulations and experimental results are presented and discussed.

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“…The proposed antenna was fabricated using an LPKF laser direct structuring (LDS) Protolaser 3D System, available within the Tyndall Microsystems Packaging Laboratory [71]. For antenna fabrication, the LDS technology was chosen because of its advantages such as low cost, easy integration to the enclosure structure, and no need for additional flex PCB [72,73]. The fabrication of the proposed antenna prototype using the LDS technology was completed in the following steps: As shown in Figure 10, a π-type matching network between points B and C has been implemented.…”

Section: Antenna Prototype Fabricationmentioning

confidence: 99%

A Wristwatch-Based Wireless Sensor Platform for IoT Health Monitoring Applications

Kumar

Buckley

Barton

et al. 2020

Sensors

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A wristwatch-based wireless sensor platform for IoT wearable health monitoring applications is presented. The paper describes the platform in detail, with a particular focus given to the design of a novel and compact wireless sub-system for 868 MHz wristwatch applications. An example application using the developed platform is discussed for arterial oxygen saturation (SpO2) and heart rate measurement using optical photoplethysmography (PPG). A comparison of the wireless performance in the 868 MHz and the 2.45 GHz bands is performed. Another contribution of this work is the development of a highly integrated 868 MHz antenna. The antenna structure is printed on the surface of a wristwatch enclosure using laser direct structuring (LDS) technology. At 868 MHz, a low specific absorption rate (SAR) of less than 0.1% of the maximum permissible limit in the simulation is demonstrated. The measured on-body prototype antenna exhibits a −10 dB impedance bandwidth of 36 MHz, a peak realized gain of −4.86 dBi and a radiation efficiency of 14.53% at 868 MHz. To evaluate the performance of the developed 868 MHz sensor platform, the wireless communication range measurements are performed in an indoor environment and compared with a commercial Bluetooth wristwatch device.

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LDS manufacturing technology for next generation radio frequency applications

Cited by 11 publications

References 7 publications

Laser-Induced Selective Electroless Plating on PC/ABS Polymer: Minimisation of Thermal Effects for Supreme Processing Speed

Laser-Induced Selective Electroless Plating on PC/ABS Polymer: Minimisation of Thermal Effects for Supreme Processing Speed

LDS Realization of High-Q SIW Millimeter Wave Filters with Cyclo-Olefin Polymers

A Wristwatch-Based Wireless Sensor Platform for IoT Health Monitoring Applications

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