IEC 62899-302-1:2017
(Main)Printed electronics - Part 302-1: Equipment - Inkjet - Imaging based measurement of jetting speed
Printed electronics - Part 302-1: Equipment - Inkjet - Imaging based measurement of jetting speed
IEC 62899-302-1:2017(E) specifies the method for determining inkjet drop speed based on visualized droplet images obtained by a drop analysis system. This measurement standardization is limited to drop-on-demand-type of inkjet and is not applicable to continuous inkjet. This document includes the test process, image processing software algorithm, and analysis of jetting behavior.
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IEC 62899-302-1 ®
Edition 1.0 2017-08
INTERNATIONAL
STANDARD
colour
inside
Printed electronics –
Part 302-1: Equipment – Inkjet – Imaging based measurement of jetting speed
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IEC 62899-302-1 ®
Edition 1.0 2017-08
INTERNATIONAL
STANDARD
colour
inside
Printed electronics –
Part 302-1: Equipment – Inkjet – Imaging based measurement of jetting speed
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.080; 37.100.10 ISBN 978-2-8322-4683-2
– 2 – IEC 62899-302-1:2017 IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Inkjet jetting speed measurement . 7
4.1 General . 7
4.2 Process for measurement of drop delivery speed (method 1) . 7
4.3 Process for measuring instantaneous jetting speed using single flash mode
(method 2) . 8
4.4 Process for instantaneous jetting speed curve (method 3) . 9
4.5 Process for measurement of instantaneous jetting speed using double flash
(method 4) . 9
Annex A (informative) Additional information on inkjet measurement methods . 11
A.1 Vision-based measurement hardware . 11
A.2 Flash imaging . 11
A.2.1 General . 11
A.2.2 Single event imaging . 11
A.2.3 Multiple event imaging . 11
A.3 Analysis method 2 (instantaneous jetting speed using single flash) . 12
A.4 Analysis method 3 (instantaneous jetting speed curve) . 13
A.5 Analysis method 4 (instantaneous jetting speed using double flash) . 15
A.6 Recorded operating parameters for drop speed measurements . 16
Bibliography . 18
Figure A.1 – Vision measurement method . 11
Figure A.2 – Two different trigger delays for two images . 12
Figure A.3 – Jetting speed measurements using two images . 12
Figure A.4 – Droplet locations in a droplet image . 13
Figure A.5 – Drop formation measurement . 14
Figure A.6 – Double flash using single jetting trigger. 15
Figure A.7 – Jetting speed measurement using double flash method . 16
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PRINTED ELECTRONICS –
Part 302-1: Equipment – Inkjet – Imaging based
measurement of jetting speed
FOREWORD
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International Standard IEC 62899-302-1 has been prepared by Technical committee 119:
Printed electronics.
The text of this standard is based on the following documents:
FDIS Report on voting
119/168/FDIS 119/183/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
– 4 – IEC 62899-302-1:2017 IEC 2017
A list of all parts in the IEC 62899 series, published under the general title Printed electronics,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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INTRODUCTION
Inkjet technology uses micro nozzles to precisely eject droplets. For printing, these droplets
are patterned on a substrate. Inkjet is a mature technology that has been used widely in home,
commercial, and industrial applications. When using inkjet technology, the volume of a droplet
can be controlled down to the tenth of a picoliter (pl). Furthermore, the droplet can be placed
onto the substrate with an accuracy of micrometers (µm). Because of these features and
others, inkjet technology has emerged as one of the most powerful tools for patterning
electronic devices, medical dispensing, high precision industrial applications, and more. Inkjet
patterning for electronics is an additive process wherein the addition of multiple layers of the
pattern does not require the removal of any previously deposited material, unlike the
conventional photolithography process. Inkjet also reduces waste when used in more
traditional printing applications and when it is used for dispensing. As a result, inkjet
technology significantly reduces waste of what are often very expensive materials and is also
more environmentally friendly.
As applications for inkjet broaden, a wider variety of jetting materials should be dispensed
precisely from inkjet heads. For both new and traditional applications, droplet behaviour from
the inkjet head should be measured properly to evaluate and control jetting behaviour. Vision-
based measurement techniques are widely used in inkjet-based manufacturing systems, since
physical insight into jetting behaviour can be obtained from visual images. The droplet jetting
speed and droplet volume are the most frequently measured jetting performance parameters
obtained from droplet images.
Using information obtained from vision-based measurement systems about inkjet droplet
formation and characteristics, developers can adjust ink formulations and jetting parameters,
in order to improve performance.
Note, however, that the measured jet performance and evaluation may vary considerably
according to the measurement method since there is no standard measurement procedure
available. It may be difficult for process engineers to judge the data sheets of jet performance
provided by ink and inkjet head manufacturers since there are no fair test methods, thus
causing potentially untrustworthy results. Therefore, the purpose of this document is to
provide a standard inkjet measurement method.
– 6 – IEC 62899-302-1:2017 IEC 2017
PRINTED ELECTRONICS –
Part 302-1: Equipment – Inkjet – Imaging based
measurement of jetting speed
1 Scope
This part of IEC 62899 specifies the method for determining inkjet dro
...
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