Silver Oxalate Ink with Low Sintering Temperature and Good Electrical Property

• Published in: Journal of electronic materials 2018-05, Vol.47 (5), p.2824-2835
• Main Authors: Yang, Wendong, Wang, Changhai, Arrighi, Valeria
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Decomposition; Electrical properties; Electrical resistivity; Electronics and Microelectronics; Instrumentation; Low temperature; Materials research; Materials Science; Microstructure; Optical and Electronic Materials; Sintering; Sintering (powder metallurgy); Solid State Physics; Substrates
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-018-6149-1

Favorable conductivity at low temperature is desirable for flexible electronics technology, where formulation of a suitable ink material is very critical. In this paper, a type of silver organic decomposable ink (10 wt.% silver content) was formulated by using as-prepared silver oxalate and butylamine, producing silver films with good uniformity and conductivity on a polyimide substrate after sintering below 130°C (15.72  μ Ω cm) and even at 100°C (36.29  μ Ω cm). Silver oxalate powder with good properties and an appropriate solid amine complex with lower decomposition temperature were synthesized, both differing from those reported in the literature. The influence of the factors on the electrical properties of the produced silver films such as sintering temperature and time was studied in detail and the relationship between them was demonstrated.