Details
| Original language | English |
|---|---|
| Article number | 015006 |
| Journal | Flexible and Printed Electronics |
| Volume | 6 |
| Issue number | 1 |
| Early online date | 9 Feb 2021 |
| Publication status | Published - Mar 2021 |
Abstract
This paper introduces a novel process for creating conductive copper traces on 3D surfaces from different additive manufacturing technologies by employing printed electronics techniques. An essential step in this process was the dip-coating pre-treatment with a primer to reduce the surface roughness below 100 nm, seal pores if present, and increase the thermal stability. This was followed by a dip-coating with copper nanoparticle ink, drying using a heat gun and thermal curing by laser sintering. The experiments determined the optimal laser peak intensity for achieving conductors with the lowest electrical resistance possible. The laser parameters' processing window provided conductive traces on 3D surfaces with properties comparable to photonic sintering on planar substrates. Thereby, the conductive traces reached electrical specific resistances lower than 18 µΩ cm (elemental copper: ρ = 1.8 µΩ cm) and a copper material percentage higher than 90 atom %. Shear tests validated the assembly with surfacemount device (SMD) resistors. Electrical tests resulted in maximum current densities higher than 100 A mm-2 and lateral breakdown voltages higher than 2kV mm-1. Thus, this paper presents essential prerequisites for a future application of the technology.
Keywords
- 3D conductive traces, additive manufacturing, copper ink, epoxy primer, laser curing
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Engineering(all)
- Electrical and Electronic Engineering
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In: Flexible and Printed Electronics, Vol. 6, No. 1, 015006, 03.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Laser sintering of copper conductive traces on primer pre-treated additive manufactured 3D surfaces
AU - Olsen, Ejvind
AU - Overmeyer, Ludger
N1 - Funding Information: The authors like to thank the German BMWi (Federal Ministry for Economic Affairs and Energy) for fund- ing the project ‘3D-CopperPrint’ project of the AiF (Arbeitsgemeinschaft industrieller Forschungsver- einigungen ‘Otto von Guericke’ e.V.) within the IGF (Industrielle Gemeinschaftsforschung), with the IGF Project No. 20133 N.
PY - 2021/3
Y1 - 2021/3
N2 - This paper introduces a novel process for creating conductive copper traces on 3D surfaces from different additive manufacturing technologies by employing printed electronics techniques. An essential step in this process was the dip-coating pre-treatment with a primer to reduce the surface roughness below 100 nm, seal pores if present, and increase the thermal stability. This was followed by a dip-coating with copper nanoparticle ink, drying using a heat gun and thermal curing by laser sintering. The experiments determined the optimal laser peak intensity for achieving conductors with the lowest electrical resistance possible. The laser parameters' processing window provided conductive traces on 3D surfaces with properties comparable to photonic sintering on planar substrates. Thereby, the conductive traces reached electrical specific resistances lower than 18 µΩ cm (elemental copper: ρ = 1.8 µΩ cm) and a copper material percentage higher than 90 atom %. Shear tests validated the assembly with surfacemount device (SMD) resistors. Electrical tests resulted in maximum current densities higher than 100 A mm-2 and lateral breakdown voltages higher than 2kV mm-1. Thus, this paper presents essential prerequisites for a future application of the technology.
AB - This paper introduces a novel process for creating conductive copper traces on 3D surfaces from different additive manufacturing technologies by employing printed electronics techniques. An essential step in this process was the dip-coating pre-treatment with a primer to reduce the surface roughness below 100 nm, seal pores if present, and increase the thermal stability. This was followed by a dip-coating with copper nanoparticle ink, drying using a heat gun and thermal curing by laser sintering. The experiments determined the optimal laser peak intensity for achieving conductors with the lowest electrical resistance possible. The laser parameters' processing window provided conductive traces on 3D surfaces with properties comparable to photonic sintering on planar substrates. Thereby, the conductive traces reached electrical specific resistances lower than 18 µΩ cm (elemental copper: ρ = 1.8 µΩ cm) and a copper material percentage higher than 90 atom %. Shear tests validated the assembly with surfacemount device (SMD) resistors. Electrical tests resulted in maximum current densities higher than 100 A mm-2 and lateral breakdown voltages higher than 2kV mm-1. Thus, this paper presents essential prerequisites for a future application of the technology.
KW - 3D conductive traces
KW - additive manufacturing
KW - copper ink
KW - epoxy primer
KW - laser curing
UR - http://www.scopus.com/inward/record.url?scp=85101552326&partnerID=8YFLogxK
U2 - 10.1088/2058-8585/abdbfd
DO - 10.1088/2058-8585/abdbfd
M3 - Article
AN - SCOPUS:85101552326
VL - 6
JO - Flexible and Printed Electronics
JF - Flexible and Printed Electronics
IS - 1
M1 - 015006
ER -