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Article
Publication date: 1 August 2016

Anthony Samano, Yanmeng Xu, David Harrison, Chris Hunt, Martin Wickham and Owen Thomas

The resistivity of cured conductive ink films are dependent on a wide range of process parameters. An early indication of the resistivity that is likely to result following curing…

214

Abstract

Purpose

The resistivity of cured conductive ink films are dependent on a wide range of process parameters. An early indication of the resistivity that is likely to result following curing can enable these parameters to be optimised and, therefore, improve product quality. This paper aims to report on the use of alternating current (AC) impedance measurement techniques on curing printed ink films as a means of assessing the resistivity likely to be attained following the curing process.

Design/methodology/approach

Impedance measurements (100 Hz-10 MHz) were performed on curing conductive carbon ink films printed on polyethylene terephthalate substrates during convective heat curing. A jig was designed to incorporate the test structure in an convection oven such that the effect of cure on the structure impedance could be investigated.

Findings

The initial impedance was found to decrease with an increase in the measurement frequency. As the ink films were cured, the impedance magnitude across the 100 Hz-10 MHz range converged with the direct current (DC) resistance value. For a given ink, the ratio of initial AC impedance at 10 MHz to final cured resistance was found to be consistent, thus giving a method where final conductivity can be estimated before cure.

Originality/value

Data from printed ink resistance measurements are required to ensure the optimal conductivity of printed devices. However, after the printed structures are fabricated and cured, it is too late to optimise process parameters, leading to significant wastage. AC impedance measurement can give an indication of the final cured resistivity whilst the structure is freshly printed and still in its curing phase, enabling the printing process parameters to be adjusted to improve the resistivity of subsequently printed devices. Measuring AC impedance of printed ink structures in a production environment can, therefore, improve output.

Details

Circuit World, vol. 42 no. 3
Type: Research Article
ISSN: 0305-6120

Keywords

Content available
Article
Publication date: 1 December 2005

30

Abstract

Details

Soldering & Surface Mount Technology, vol. 17 no. 4
Type: Research Article
ISSN: 0954-0911

Keywords

Content available
Article
Publication date: 13 February 2007

J.H. Ling

28

Abstract

Details

Soldering & Surface Mount Technology, vol. 19 no. 1
Type: Research Article
ISSN: 0954-0911

Content available
Article
Publication date: 1 March 2005

37

Abstract

Details

Soldering & Surface Mount Technology, vol. 17 no. 1
Type: Research Article
ISSN: 0954-0911

Keywords

Content available
Article
Publication date: 1 September 2005

42

Abstract

Details

Circuit World, vol. 31 no. 3
Type: Research Article
ISSN: 0305-6120

Keywords

Content available
Article
Publication date: 1 March 2005

33

Abstract

Details

Soldering & Surface Mount Technology, vol. 17 no. 1
Type: Research Article
ISSN: 0954-0911

Keywords

Content available
Article
Publication date: 13 February 2007

Martin Goosey

48

Abstract

Details

Circuit World, vol. 33 no. 1
Type: Research Article
ISSN: 0305-6120

Content available
80

Abstract

Details

Soldering & Surface Mount Technology, vol. 17 no. 4
Type: Research Article
ISSN: 0954-0911

Keywords

Content available
Article
Publication date: 8 February 2008

46

Abstract

Details

Circuit World, vol. 34 no. 1
Type: Research Article
ISSN: 0305-6120

Content available
Article
Publication date: 22 May 2007

55

Abstract

Details

Circuit World, vol. 33 no. 2
Type: Research Article
ISSN: 0305-6120

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