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.

General Information

Publication Date
Technical Committee
Drafting Committee
Current Stage
PPUB - Publication issued
Start Date
Completion Date
Ref Project

Buy Standard

IEC 62899-302-1:2017 - Printed electronics - Part 302-1: Equipment - Inkjet - Imaging based measurement of jetting speed
English language
18 pages
sale 15% off
sale 15% off

Standards Content (Sample)

IEC 62899-302-1 ®
Edition 1.0 2017-08
Printed electronics –
Part 302-1: Equipment – Inkjet – Imaging based measurement of jetting speed
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - Electropedia -
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - IEC Glossary -
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

IEC Just Published -

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre -
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
IEC 62899-302-1 ®
Edition 1.0 2017-08
Printed electronics –
Part 302-1: Equipment – Inkjet – Imaging based measurement of jetting speed

ICS 19.080; 37.100.10 ISBN 978-2-8322-4683-2

– 2 – IEC 62899-302-1:2017  IEC 2017
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

Part 302-1: Equipment – Inkjet – Imaging based
measurement of jetting speed
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
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 "" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
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
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

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.