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[IEEE 2018 13th International Congress Molded Interconnect Devices (MID) - Wu?rzburg (2018.9.25-2018.9.26)] 2018 13th International Congress Molded Interconnect Devices (MID) - Applications of Three Dimensional Laser Induced Metallization Technology with Polymer Coating
摘要： A fully developed three dimensional laser induced metallization (LIM) on molded interconnect devices (MIDs) is widely used on various products. The target substrate is sprayed with a special thin layer (50 μm) polymer coating first, and heated at 80°C to cure. Then using laser to define the pattern of conductors and induce the catalyst in the special polymer layer. After the electroless copper plating, the pattern is metallized. The whole process can be fully copy again on layer-by-layer to achieve the idea of multi-layer. For the high feasibility on any complex surface and material, such as glass, plastic, ceramic, etc., the LIM technology can be used for vary kind of products. In this paper, the LIM technology has applied on QR code stickers, 2G/3G/4G all-in-one compact antenna, mm-wave antenna, built-in antenna on mobile phone case, multi-layer NFC antenna, and humanoid robot finger. The QR code can be patterning on a thin film of 100 um and with a great flexibility. In addition, the return loss of 2G/3G/4G all-in-one compact antenna reaches the 3:1 VSWR standard, and the radiation efficiency is larger than 60% within the operation frequency. The built-in antenna on mobile phone case can reduce the waste of space and strongly secure the antenna from detachment. The LIM technology applied on the ceramic substrate can successfully fabricate a high directionality 38GHz mm-wave antenna and with above 10dBi of array gain, average efficiency up to 50%, and bandwidth up to 2 GHz. Furthermore, the multi-layer NFC antenna can successfully reduce the size and reach the maximum read distance of 3 cm. Using the same idea of multi-layer, the capacitive tactile sensor that can sense both normal and shear force is placed on humanoid robot finger to provide the tactile ability. The products described above will be briefly introduced in this paper and related testing results will be mentioned.
关键词： Antenna,Multilayer,3D-MID,Polymer Coating,Laser Induced Metallization
更新于2025-09-23 15:22:29
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[IEEE 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) - Rome, Italy (2019.6.17-2019.6.20)] 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) - Bismuth and Bismuth Telluride Thin Films Deposited by MOCVD upon Tapered Fiber Sections as Q-switches for Fiber Lasers
摘要： Lasing regimes of ring erbium ?ber lasers passively Q-switched by means of ?ber tapers coated with thin crystalline ?lms of either Bi2Te3 or Bi as saturable absorbers (SAs) are investigated. 10–15 μm in diameter and 5–10 mm long ?ber tapers are prepared by local chemical etching out of a silica light re?ecting cladding of the standard SMF-28 optical ?ber. Nanometer thick island ?lms of pure Bi and Bi2Te3 are synthesized on the surface of the ?ber tapers by applying the metalorganic chemical vapor deposition (MOCVD). The deposited ?lms are then covered with two di?erent polymers: either polyvinyl acetate (PVA) or polydimethylsiloxane elastomer (PDMSE). The ?ber section with polymer-coated SA ?ber is installed into the ring laser cavity in tandem with the section of an active ?ber. For all the samples a stable generation of microsecond pulses in the Q-switch mode at a wavelength of about 1560 nm is observed. To the best of our knowledge, a passively Q-switched ?ber laser with nanometer Bi ?lms as a saturable absorber is implemented for the ?rst time. It is established that even a small increase in the temperature of the surrounding medium leads to a signi?cant increase in the transmission coe?cient of polymer-coated tapers with deposited SA ?lms, which may be attributed to a decrease in the refractive index of the polymers. The most signi?cant increase in the transmission coe?cient with increasing temperature is observed in tapers coated with PVA, which has a refractive index larger than fused silica.
关键词： MOCVD,Q-switches,polymer coating,saturable absorbers,Bi2Te3,fiber lasers,Bi
更新于2025-09-19 17:13:59
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TG-FTIR coupled analysis to predetermine effective precursors for laser-activated and electroless metallized materials
摘要： Copper compounds can be used as additives to elaborate polymer materials, which after laser-induced ablation can be directly metallized on the irradiated surface area. In this work, three [Cu(l-tyr)2]n (l-tyr = l-tyrosine) (A), [Cu(bpy)3][CrO4]·7.5H2O (bpy = 2,2′-bipyridine) (B) and [Cu(bpy)2(O2SO2)]·CH3OH (C) copper(II) complexes were evaluated. The complexes were mixed at 20 mass% with polyurethane resin to form the coatings. The coatings were irradiated with ArF excimer laser and electroless metallized. It was found that only complex A was effective metallization precursors. Thermal properties of the copper(II) complexes were considered as crucial for defining effective precursors. TG-FTIR coupled analysis was applied to predetermine thermal properties of the compounds, which can be responsible for effective metallization. It was found that the main reason for unsuccessful metallization of the coatings containing complexes B or C was release of lattice H2O or CH3OH molecules in crystal structures, respectively, which affected ablation of the coatings. Appropriate model of laser ablation was also proposed.
关键词： Copper(II) complexes,Polymer coating,Electroless metallization,Laser modification,TG-FTIR coupled analysis
更新于2025-09-11 14:15:04