@article{MTMT:36416775,
	title = {Sustainable, flame-retarded and biodegradable printed circuit boards based on Polylactic Acid (PLA) with wool-fibre reinforcement: review of processing and manufacturing technologies},
	url = {https://m2.mtmt.hu/api/publication/36416775},
	author = {Farkas, Csaba and Xiao, Dan and Knez, Katharina and Qi, Yue and Gohs, Uwe and Harre, Kathrin and Berényi, Richárd and Sonmez, Maria and Gurau, Dana and Georgescu, Mihai and Constantinescu, Doina and Géczy, Attila},
	doi = {10.1016/j.rineng.2025.108034},
	journal-iso = {RESULT ENGIN},
	journal = {RESULTS IN ENGINEERING},
	volume = {28},
	unique-id = {36416775},
	issn = {2590-1230},
	abstract = {Among the increasing utilisation of biopolymers, polylactic acid (PLA) has gained significant attention as a biodegradable alternative to petroleum-based plastics in various applications, including electronics, packaging, and biomedical fields. Because of its enormous potential as a green and eco-friendly substitution for traditional printed circuit board (PCB) substrates, and its satisfactory reliability in many prototype applications, PLA reached the most important stage in the line of alternative materials for designing future-proof and sustainable electronic devices. Due to the growing demand for environmentally friendly products from both the industry and customers, innovative solutions' sustainability needs equal weight with their performance and dependability. This study focuses on creating a narrative and scoping review to investigate the typical properties of PLA. It summarises the processing and manufacturing techniques that convert PLA into printed circuit substrates. The paper explores the basic parameters and different compositions of PLA with reinforcement materials, focusing on a specific fibre addition, wool. As an added value, the manuscript presents the related eco-friendly flame-retardant solutions. The currently applied subtractive (e.g. compression and casting methods) and additive (e.g. inkjet printing, 3D printing) fabrication methods are investigated, pointing out the benefits and shortcomings through the foregoing research projects and the presented applications. The assembly practices of electronics on PLA are also investigated, and typical routines of component mounting and soldering methods are compared. The paper aims to cover the research gap in fibre-reinforced, sustainable, flame retarded PLA substrates for future green electronics.},
	year = {2025},
	eissn = {2590-1230},
	orcid-numbers = {Knez, Katharina/0009-0002-1424-1043; Constantinescu, Doina/0009-0002-6068-8022}
}

@inproceedings{MTMT:36609953,
	title = {Electrochemical Migration: A Short State-of-the-Art Overview},
	url = {https://m2.mtmt.hu/api/publication/36609953},
	author = {Gharaibeh, Ali and Dayoub, Ali and Berényi, Richárd and Medgyes, Bálint},
	booktitle = {2025 IEEE 31st International Symposium for Design and Technology in Electronic Packaging (SIITME)},
	doi = {10.1109/SIITME67657.2025.11293708},
	unique-id = {36609953},
	year = {2025},
	pages = {152-159},
	orcid-numbers = {Medgyes, Bálint/0000-0003-3959-7679}
}

@article{MTMT:35145793,
	title = {Implementation of microcontroller board on a sustainable and degradable PLA/Flax composite substrate: a case study},
	url = {https://m2.mtmt.hu/api/publication/35145793},
	author = {Géczy, Attila and Piffkó, Dániel and Berényi, Richárd and Dusek, Karel and Xavier, Pascal and Cuartielles, David},
	doi = {10.1088/1361-6528/ad66d3},
	journal-iso = {NANOTECHNOLOGY},
	journal = {NANOTECHNOLOGY},
	volume = {35},
	unique-id = {35145793},
	issn = {0957-4484},
	abstract = {In this paper, we present a novel polylactic-acid/flax-composite substrate and the implementation of a demonstrator: a microcontroller board based on commercial design. The substrate is developed for printed circuit board (PCB) applications. The pre-preg is biodegradable, reinforced, and flame-retarded. The novel material was developed to counter the increasing amount of e-waste and to improve the sustainability of the microelectronics sector. The motivation was to present a working circuit in commercial complexity that can be implemented on a rigid substrate made of natural, bio-based materials with a structure very similar to the widely used Flame Retardant Class 4 (FR4) substrate at an early technological readiness level (TRL 2-3). The circuit design is based on the Arduino Nano open-source microcontroller board design so that the demonstration could be programmable and easy to fit into education, IoT applications, and embedded designs. During the work, the design was optimized at the level of layout. The copper-clad pre-preg was then prepared and processed with subtractive printed wiring technology and through hole plating. The traditional surface mounting methodology was applied for assembly. The resulting yield of PCB production was around 50%. Signal analysis was successful with analogue data acquisition (voltage) and low-frequency (4 kHz) tests, indistinguishable from sample FR4 boards. Eventually, the samples were subjected to highly accelerated stress test (HAST). HAST tests revealed limitations compared to traditional FR4 printed circuit materials. After six cycles, the weight loss was around 30% in the case of PLA/Flax, and as three-point bending tests showed, the possible ultimate strength (25 MPa at a flexural state) was reduced by 80%. Finally, the sustainability aspect was assessed, where we found that ~95vol% and ~90wt% of the traditional substrate can be substituted, significantly easing the load of waste on the environment.},
	year = {2024},
	eissn = {1361-6528}
}

@article{MTMT:31809068,
	title = {Amorf és nanokristályos lágymágneses anyagok bevezethetőségének vizsgálata gépjármű elektromotorok gyártásába},
	url = {https://m2.mtmt.hu/api/publication/31809068},
	author = {Nagy, Márton and Bán, Krisztián Péter and Fogarassy, Zsolt and Berényi, Richárd},
	journal-iso = {BKL KOHÁSZAT},
	journal = {BÁNYÁSZATI ÉS KOHÁSZATI LAPOK-KOHÁSZAT},
	volume = {153},
	unique-id = {31809068},
	issn = {0005-5670},
	year = {2020},
	pages = {40-43},
	orcid-numbers = {Fogarassy, Zsolt/0000-0003-4981-1237}
}

@inproceedings{MTMT:31357232,
	title = {Simulation of reflow-based heat transfer on different thermocouple constructions},
	url = {https://m2.mtmt.hu/api/publication/31357232},
	author = {Straubinger, Dániel and Illés, Balázs György and Berényi, Richárd and Géczy, Attila},
	booktitle = {2020 43rd International Spring Seminar on Electronics Technology (ISSE)},
	doi = {10.1109/ISSE49702.2020.9120968},
	unique-id = {31357232},
	year = {2020}
}

@inproceedings{MTMT:31177406,
	title = {Reliability Tests on SAC-xMn Solder Alloys},
	url = {https://m2.mtmt.hu/api/publication/31177406},
	author = {Szurdan, Szabolcs and Medgyes, Bálint and Mende, Tamás and Berényi, Richárd and Gál, László and Harsányi, Gábor},
	booktitle = {2019 IEEE 25th International Symposium for Design and Technology in Electronic Packaging (SIITME)},
	doi = {10.1109/SIITME47687.2019.8990729},
	unique-id = {31177406},
	year = {2019},
	pages = {34-37},
	orcid-numbers = {Medgyes, Bálint/0000-0003-3959-7679; Harsányi, Gábor/0000-0002-8514-8842}
}

@article{MTMT:34140122,
	title = {Integrált induktivitások lézeres megmunkálással segített készítése},
	url = {https://m2.mtmt.hu/api/publication/34140122},
	author = {Berényi, Richárd and Ruszinkó, Miklós},
	doi = {10.35403/etesgyi.2018.02.019},
	journal-iso = {ELEKTRON TECHNOL GYÁRTINFORM},
	journal = {ELEKTRONIKAI TECHNOLÓGIA ÉS GYÁRTÁSINFORMATIKA},
	volume = {1},
	unique-id = {34140122},
	issn = {2631-0813},
	year = {2018},
	pages = {19-23}
}

@inproceedings{MTMT:3426440,
	title = {Electrochemical Migration of ENIG surface finish in Na2SO4 Environment},
	url = {https://m2.mtmt.hu/api/publication/3426440},
	author = {Medgyes, Bálint and Szabo, P and Adam, S and Tar, L and Ruszinkó, Miklós and Berényi, Richárd},
	booktitle = {2018 41st International Spring Seminar on Electronics Technology (ISSE)},
	doi = {10.1109/ISSE.2018.8443622},
	unique-id = {3426440},
	abstract = {The electrochemical migration (ECM) behavior of Electroless Nickel Immersion Gold (ENIG) surface finish was studied using Na2SO4 solutions with various concentrations. The investigations were carried out by water drop (WD) test. During WD test the electrochemical processes were followed by electrical and visual inspections. Based on the mean-time-to-failure (MTTF) data it was shown that MTTF increased at 0.1 mM Na2SO4 solution, then on higher concentrations MTTF significantly decreased and stabilized over the concentrations.},
	year = {2018},
	orcid-numbers = {Medgyes, Bálint/0000-0003-3959-7679}
}

@article{MTMT:3355258,
	title = {Ultraviolet nanosecond laser ablation behavior of silver nanoparticle and melamine–formaldehyde resin-coated short sisal fiber-modified PLA composites},
	url = {https://m2.mtmt.hu/api/publication/3355258},
	author = {Tengsuthiwat, J and Siengchin, S and Berényi, Richárd and Karger-Kocsis, József},
	doi = {10.1007/s10973-018-7048-7},
	journal-iso = {J THERM ANAL CALORIM},
	journal = {JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY},
	volume = {132},
	unique-id = {3355258},
	issn = {1388-6150},
	abstract = {Nd:YAG laser (355 nm) induced surface modifications in polylactic acid (PLA), and its composites with silver nanoparticles (AgNPs, size range between 120 and 150 nm) with and without additional melamine–formaldehyde-coated short sisal fibers were studied as a function of laser pulse numbers. The AgNP content was varied (100, 300 and 500 ppm), whereas the sisal content kept as constant (9 mass%). The PLA-based systems with a fully amorphous matrix were irradiated with 1–256 laser pulses at a constant fluence of 0.32 µJ µm−2. Changes in the irradiated surfaces were assessed and quantified by light and scanning electron microscopic pictures. Protrusion with bubbling, bubbled protrusion with cratering and crater formation with more or less bubbled ridges were found as characteristic ablation features. Bubbling was traced to entrapped gaseous products of PLA degradation, while the onset of ridges was ascribed to the melt flow of the PLA matrix caused by laser shock waves. The laser irradiation caused damage and ablation highly depended on the actual composition, which influenced the UV absorption at 355 nm, which was measured as well. © 2018 Akadémiai Kiadó, Budapest, Hungary},
	year = {2018},
	eissn = {1588-2926},
	pages = {955-965},
	orcid-numbers = {Karger-Kocsis, József/0000-0001-9699-7471}
}

@article{MTMT:3175704,
	title = {Nanostructured pulsed current metal coatings of Fe and Fe–Ni for microelectronic applications},
	url = {https://m2.mtmt.hu/api/publication/3175704},
	author = {Lakatos-Varsányi, M and Murányi, R and Hajdu, F and Berényi, Richárd and Varga, Lajos Károly},
	doi = {10.1080/00202967.2017.1256061},
	journal-iso = {T I MET FINISH},
	journal = {TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING},
	volume = {95},
	unique-id = {3175704},
	issn = {0020-2967},
	year = {2017},
	eissn = {1745-9192},
	pages = {6-8}
}