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The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines. / Timothy James Barden

Swansea University Author: Timothy James Barden

Abstract

Screen printing is used for printing fine lines in the electronics industry, as the process is able to print a large ink film thickness, enabling a variety of resistances, and it is capable of printing onto inflexible surfaces. The cross-sectional area of printed lines determines the electrical char...

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Published: 2008
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42560
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first_indexed 2018-08-02T18:55:00Z
last_indexed 2018-08-03T10:10:28Z
id cronfa42560
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spelling 2018-08-02T16:24:29.6654041 v2 42560 2018-08-02 The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines. 675719387af070bdfbdb8417a31767c4 NULL Timothy James Barden Timothy James Barden true true 2018-08-02 Screen printing is used for printing fine lines in the electronics industry, as the process is able to print a large ink film thickness, enabling a variety of resistances, and it is capable of printing onto inflexible surfaces. The cross-sectional area of printed lines determines the electrical characteristics of the line. Presently, line cross-sectional size is determined by measuring line width, as the shape of a screen printed line is assumed rectangular and line height is assumed known from other screen printing process parameters. However, for fine lines this assumption may not be true. The aims of this project have been to ascertain the effect of screen printing process parameters on line quality and investigate the relationship between line width and cross-sectional area for fine lines. A large experimental programme has been undertaken that investigated the influence of the screen printing process parameters on line width, cross-sectional area, line continuity and cross-sectional shape. The screen printing process parameters investigated were the squeegee parameters, the ink type and the screen. The effect of the orientation of the lines to the print direction has also been investigated. A new measurement system has been developed to extract and evaluate the appropriate information from the printed images and allow full analysis of the results. A new parameter, the rectangular index, was developed specifically to understand the correlation between line width and cross-sectional area for fine lines. The measurement system has been used to analyse the results, investigating repeatability, orientation, line cross-sectional size, line continuity and line cross-sectional shape. The line continuity, line edge quality and ink transfer were linked. Sufficient ink transfer leads to good line edge quality and continuity. The ink type and line width were the only parameters to affect the line cross-sectional shape. A new model has been proposed that related line width and cross-sectional area for fine lines. This would permit the use of 2D image processing for on-line quality assurance as opposed to 3D measurement or functionality testing, both of which are slower and have to be used off-line. E-Thesis Electrical engineering. 31 12 2008 2008-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-02T16:24:29.6654041 2018-08-02T16:24:29.6654041 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Timothy James Barden NULL 1 0042560-02082018162504.pdf 10805309.pdf 2018-08-02T16:25:04.1100000 Output 30274306 application/pdf E-Thesis true 2018-08-02T16:25:04.1100000 false
title The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines.
spellingShingle The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines.
Timothy James Barden
title_short The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines.
title_full The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines.
title_fullStr The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines.
title_full_unstemmed The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines.
title_sort The application of three-dimensional profiling to the measurement and characterisation of screen printed fine lines.
author_id_str_mv 675719387af070bdfbdb8417a31767c4
author_id_fullname_str_mv 675719387af070bdfbdb8417a31767c4_***_Timothy James Barden
author Timothy James Barden
author2 Timothy James Barden
format E-Thesis
publishDate 2008
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Screen printing is used for printing fine lines in the electronics industry, as the process is able to print a large ink film thickness, enabling a variety of resistances, and it is capable of printing onto inflexible surfaces. The cross-sectional area of printed lines determines the electrical characteristics of the line. Presently, line cross-sectional size is determined by measuring line width, as the shape of a screen printed line is assumed rectangular and line height is assumed known from other screen printing process parameters. However, for fine lines this assumption may not be true. The aims of this project have been to ascertain the effect of screen printing process parameters on line quality and investigate the relationship between line width and cross-sectional area for fine lines. A large experimental programme has been undertaken that investigated the influence of the screen printing process parameters on line width, cross-sectional area, line continuity and cross-sectional shape. The screen printing process parameters investigated were the squeegee parameters, the ink type and the screen. The effect of the orientation of the lines to the print direction has also been investigated. A new measurement system has been developed to extract and evaluate the appropriate information from the printed images and allow full analysis of the results. A new parameter, the rectangular index, was developed specifically to understand the correlation between line width and cross-sectional area for fine lines. The measurement system has been used to analyse the results, investigating repeatability, orientation, line cross-sectional size, line continuity and line cross-sectional shape. The line continuity, line edge quality and ink transfer were linked. Sufficient ink transfer leads to good line edge quality and continuity. The ink type and line width were the only parameters to affect the line cross-sectional shape. A new model has been proposed that related line width and cross-sectional area for fine lines. This would permit the use of 2D image processing for on-line quality assurance as opposed to 3D measurement or functionality testing, both of which are slower and have to be used off-line.
published_date 2008-12-31T03:53:12Z
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score 11.036116

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