Aspects of additive copper deposition on biodegradable and environmentally friendly PCB substrates (PLA, CA, GPTE-DETDA)

Gal, Laszlo; Géczy, Attila; Horváth, Gergely; Rigler, Daniel; Hajdu, István

doi:10.1109/isse.2018.8443956

Cited by 5 publications

(5 citation statements)

References 20 publications

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“…These larger vales are due to occasional peaks and valleys in the composite. In case of FR4, the Ra is below 1 µm [29], the latter parameter is slightly more 1 µm [30]. Reducing the roughness is a serious task of the future.…”

Section: Production Resultsmentioning

confidence: 99%

Implementation of microcontroller board on a sustainable and degradable PLA/flax composite substrate: a case study

Géczy,

Piffkó,

Berényi

et al. 2024

Nanotechnology

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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.

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Section: Production Resultsmentioning

confidence: 99%

Implementation of microcontroller board on a sustainable and degradable PLA/flax composite substrate: a case study

Géczy,

Piffkó,

Berényi

et al. 2024

Nanotechnology

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“…Géczy et al showed PLA and cellulose-acetate (CA) boards could be used for surface mounting. The research group also produced several other publications, involving PLA and CA, as PCB substrate [19][20][21][22][23][24][25][26][27]. Recently a promising improvement was introduced by the same team, where flame-retarded PLA was reinforced with flame-retarded flax fibres, to form a biodegradable substrate [27].…”

Section: B Materials and Processes Used To Produce Printed Electronic...mentioning

confidence: 99%

“…Nevertheless, the quality of joints depends on the specific type of biopolymer [45]. Further, instead of standard bismuth-tin solder alloy (58Bi42Sn or 58Bi41Sn1Ag), Rose's alloy with the composition of 50Bi(25-28)Pb (22)(23)(24)(25)Sn can be beneficially utilized thanks to its melting point of 94 °C [17].…”

Section: Assemblingmentioning

confidence: 99%

Biodegradable and Nanocomposite Materials as Printed Circuit Substrates: A Mini-Review

Géczy

Farkas

Kovács

et al. 2022

IEEE Open J. Nanotechnol.

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Biodegradables are a promising path for the future of electronics in a greener mindset. The review study focuses on their applications and past and current research results. The paper also investigates the application of nanomaterials as fillers to control or increase the physical (electrical, mechanical, thermal) properties of biodegradable biopolymers. These biodegradables and nanocomposites are already effectively used in prototypes and advanced application areas with demanding requirements, such as flexible and wearable electronics, implantable or biomedical applications, and traditional commercial electronics. The nanoenhanced biopolymer substrates (e.g., with improved gas and water barrier functionalities) sometimes also with integrated, nanoenabled functionalities (such as electromagnetic shielding or plasmonic activity) can be beneficial in many electronics packaging and nanopackaging applications as well.

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“…Sustainable and printable substrate materials can be found among different cellulose and wood-based materials, bioplastics, and biocomposites [ 8 , 9 , 10 , 11 , 12 , 13 ]. Electrochemical deposition of copper and tin has been demonstrated on poly(lactic acid) (PLA) substrate and vapor phase reflow soldering has been performed on PLA and cellulose acetate substrates based on copper laminates [ 14 , 15 ]. Wood-based substrate materials are one opportunity for printed circuit board (PCB) manufacturing to replace current plastic and composite materials [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…The use of PCBs in electronic devices usually sets specific requirements for surface roughness and adhesion, mechanical durability, temperature stability and moisture tolerance; the use of fire retardants is also often expected [ 14 , 15 , 18 , 19 ]. The capability of wood-based materials to meet these expectations might be limited, but the work reported in this paper aims to show that there are potential material alternatives already available which are compatible with electronic performance and printability requirements.…”

Section: Introductionmentioning

confidence: 99%

Potential of Commercial Wood-Based Materials as PCB Substrate

et al. 2022

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In our research on sustainable solutions for printed electronics, we are moving towards renewable materials in applications, which can be very challenging from the performance perspective, such as printed circuit boards (PCB). In this article, we examine the potential suitability of wood-based materials, such as cardboard and veneer, as substrate materials for biodegradable solutions instead of the commonly used glass-fiber reinforced epoxy. Our substrate materials were coated with fire retardant materials for improved fire resistance and screen printed with conductive silver ink. The print quality, electrical conductivity, fire performance and biodegradation were evaluated. It was concluded that if the PCB application allows manufacturing using screen printing instead of an etching process, there is the potential for these materials to act as substrates in, e.g., environmental analytics applications.

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Aspects of additive copper deposition on biodegradable and environmentally friendly PCB substrates (PLA, CA, GPTE-DETDA)

Cited by 5 publications

References 20 publications

Implementation of microcontroller board on a sustainable and degradable PLA/flax composite substrate: a case study

Implementation of microcontroller board on a sustainable and degradable PLA/flax composite substrate: a case study

Biodegradable and Nanocomposite Materials as Printed Circuit Substrates: A Mini-Review

Potential of Commercial Wood-Based Materials as PCB Substrate

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