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IEC 62899-302-3
Edition 1.0 2021-01
INTERNATIONAL
STANDARD
colour
inside
Printed electronics –
Part 302-3: Equipment – Inkjet – Imaging-based measurement of drop direction
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IEC 62899-302-3
Edition 1.0 2021-01
INTERNATIONAL
STANDARD
colour
inside
Printed electronics –
Part 302-3: Equipment – Inkjet – Imaging-based measurement of drop direction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.080; 37.100.10 ISBN 978-2-8322-9286-0
– 2 – IEC 62899-302-3:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Measurement methods . 7
4.1 General . 7
4.2 Process for projected angle using one double flash drop watcher (method 1) . 7
4.3 Process for projected angle using one single flash drop watcher (method 2) . 8
4.4 Process for projected angle using one strobe flash drop watcher (method 3) . 8
4.5 Process for trajectory angles using two double flash drop watchers (method 4)
............................................................................................................................... 8
4.6 Process for trajectory angles using two single flash drop watchers (method 5)
............................................................................................................................... 8
4.7 Process for trajectory angles using two strobe flash drop watchers (method 6) . 8
Annex A (informative) Determination of jetted drop direction . 9
A.1 Imaging-based measurements of jetted drop direction . 9
A.2 Formulae used for imaging results from the measurements . 13
A.2.1 Formulae for projected angle using one double flash drop watcher
(method 1) . 13
A.2.2 Formulae for projected angle using one single flash drop watcher
(method 2) . 13
A.2.3 Formulae for projected angle using one strobe drop watcher (method 3) . 13
A.2.4 Formulae for trajectory angles using two double flash drop watchers
(method 4) . 14
A.2.5 Formulae for measured trajectory angles using two single flash drop
watchers (method 5) . 15
A.2.6 Formulae for measured trajectory angles using two strobe flash drop
watchers (method 6) . 17
A.3 Recording . 18
Bibliography . 20
Figure A.1 – Schematic representation of jetted drop positions below a jetting nozzle
(0) for double flash (1-2), single flash (1-2ʹ) and strobe flash (1ʺ-2ʺ) at different delays . 10
Figure A.2 – Schematic representation of a) the projected angle δ in 2-D and b) the
trajectory angles θ and ψ in 3-D . 11
Figure A.3 – Example of two orthogonally-mounted in-flight imaging drop watchers . 12
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PRINTED ELECTRONICS –
Part 302-3: Equipment – Inkjet –
Imaging-based measurement of drop direction
FOREWORD
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
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International Standard IEC 62899-302-3 has been prepared by IEC technical committee 119:
Printed Electronics.
The text of this International Standard is based on the following documents:
FDIS Report on voting
119/332/FDIS 119/344/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 62899-302-3:2021 © IEC 2021
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.
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.
INTRODUCTION
Establishing the jetted drop direction under specific operating conditions of inks and inkjet
print-heads is significant for accurate drop placement during the manufacture of printed
electronics. Manufacturers that include such print-heads in their equipment should know the
angular spread of ink drop directions because this influences the achievable spatial resolution
of the printed material, and in particular whether any neighbouring conducting tracks could be
connected by stray materials, which would affect the printed electronics' product performance.
This document defines the methods for in-flight imaging measurement of jetted drop direction
from drop-on-demand type inkjet print-heads to be used in printed electronics equipment.
– 6 – IEC 62899-302-3:2021 © IEC 2021
PRINTED ELECTRONICS –
Part 302-3: Equipment – Inkjet –
Imaging-based measurement of drop direction
1 Scope
This part of IEC 62899 specifies in-flight imaging methods for the measurement of the
direction of ink drops jetted from inkjet print-heads using drop watchers. It does not apply to
holographic or other interference techniques, or to any method assessing deposited ink drops.
It is specific to drop-on-demand type inkjet print-heads (used in printed electronics
equipment).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 62899-302-1, Printed electronics – Equipment – Inkjet – Imaging based measurement of
jetting speed
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62899-302-1 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
inkjet nozzle plane
flat outer surface of the inkjet print-head nozzle plate
Note 1 to entry: The inkjet nozzle plane is defined for a drop-on-demand multi-nozzle print-head, or as otherwise
specified by the print-head manufacturer or inkjet equipment integrator and stated in the measurement results.
3.2
nozzle row direction
line in the inkjet nozzle plane passing through a row of nozzle exit centres
Note 1 to entry: Typically along the length of the inkjet nozzle plane, or as otherwise specified by the print-head
manufacturer or inkjet equipment integrator and stated in the measurement results.
3.3
reference direction
normal angle (90°) to the inkjet nozzle plate
Note 1 to entry: Or as oth
...