Technical Data Sheet
Multicore MP200 RWF
May 2007
REWORK AND DCA FLUX
MP200 RWF is a halide free tacky flux designed for use
in a wide range of electronics assembly and rework
processes.
Sufficient activity to deal with different component
solderability
Compatible with Multicore MP200 solder paste
Good tack force to assist flip chip attach
Supplied in syringes or cartridges for application by
dispensing.
APPLICATIONS
Recommended for rework processes on assemblies build
with Multicore MP200 solder paste.
RECOMMENDED OPERATING CONDITIONS
There are many applications for this product and users may
find that their own process requires particular conditions.
The following information can therefore be for guidance
only.
REWORK:
The main function of the flux is threefold. It
provides a thermal pathway from the heat source to the
workpiece, ensuring that it is evenly heated. The viscous
fluid protects metal surfaces from rapid oxidation at
soldering temperature. It breaks down surface contaminants
to allow solder spread. On tin/lead surfaces, this may be a
purely physical effect causing oxide skins to flow away
from the molten coating but chemical dissolution may also
be required.
Where a component is to be soldered into place for the first
time, the alloy for the fillet may be provided by the fusible
coating on the PCB and to some extent, on the component
termination. The PCB may be of conventional design or it
can be specially fabricated with a flat, thick solder coating
(Solid Solder Deposition, SSD). In either case, MP200 RWF
is a suitable product and it will provide a sufficiently tacky
surface to hold the component in place.
When a component is to be soldered to a board having little
or no fusible coating, MP200 RWF will clean the surface to
be joined. Solder for the joint is supplied by wire which may
be solid or flux cored. If flux cored wire is used, it is
recommended that Multicore X39 is selected since the
residues are minimal and totally compatible with MP200
RWF.
Where components have been removed from a PCB, it is
important to prepare the site for the replacement device in
order that the resoldering process can be carried out
efficiently. Excess solder should be removed from the PCB
with Multicore No Clean Desoldering Wick and areas
showing abnormally high levels of oxidation may benefit
from pretinning.
In all cases, a variety of heating methods may be used to
produce a solder joint with this product. These include
soldering irons, hot gas and hot bar devices, condensation
reflow and IR/convection reflow. Specialist tools and
workstations are available to assist operators but skill will
often be required to adapt these to particular situations.
MP200 RWF is tolerant of a wide range of temperature
profiles and any residues left after reflow will be hard, clear
and non-tacky.
DCA:
MP200 RWF is ideal for direct chip attach
applications, for example flip chip. In this case MP200 RWF
should be doctor bladed into a reservoir of appropriate depth
and the chip presented to coat the solder bumps prior to
placement. The tack associated with MP200 RWF will then
hold the chip in place ready for reflow, although care should
always be taken when handling fragile assemblies such as
these. The reservoir depth will be governed by many process
considerations, but especially the bump diameter: good
results have been obtained with100 µm bumps by using a
depth of 35 µm.
TECHNICAL SPECIFICATION
The following Table summarises typical product properties.
Full details of test methods are available on request.
TEST
Acid Value, mg KOH/g total
flux
Brookfield Viscosity (cP)
Tack Force (g mm-
1
)
Flash point (°C)
Flux Classification
J-STD-004
Copper Mirror Test
Corrosion Test *)
IPC-SF-818
Chromate Paper Test
SIR Test (without cleaning) *)
GR-78-Core
J-STD-004
Electromigration Test *)
(without cleaning)
Bellcore GR-78-CORE
FLUX PROPERTIES
MP200 RWF
115
400,000
2.0
124
ROLO
Pass
Pass (10 days)
Pass
Pass
Pass
Pass
*) tested with suitable alloy
NOT FOR PRODUCT SPECIFICATIONS
THE TECHNICAL INFORMATION CONTAINED HEREIN IS INTENDED FOR REFERENCE ONLY. PLEASE CONTACT HENKEL
TECHNOLOGIES TECHNICAL SERVICE FOR ASSISTANCE AND RECOMMENDATIONS ON SPECIFICATIONS FOR THIS
PRODUCT.
MP200 RWF, May 2007
STORAGE
MP200 RWF should be stored at room temperature. Shelf
life is six months from date of manufacture.
GENERAL INFORMATION
For safe handling information on this product, consult
the Material Safety Data Sheet, (MSDS).
Note
The data contained herein are furnished for information only and are
believed to be reliable. We cannot assume responsibility for the results
obtained by others over whose methods we have no control. It is the user's
responsibility to determine suitability for the user's purpose of any
production methods mentioned herein and to adopt such precautions as may
be advisable for the protection of property and of persons against any
hazards that may be involved in the handling and use thereof. In light of the
foregoing,
Henkel Corporation specifically disclaims all warranties
expressed or implied, including warranties of merchantability or
fitness for a particular purpose, arising from sale or use of Henkel
Corporation’s products. Henkel Corporation specifically disclaims any
liability for consequential or incidental damages of any kind, including
lost profits.
The discussion herein of various processes or compositions is
not to be interpreted as representation that they are free from domination of
patents owned by others or as a license under any Henkel Corporation
patents that may cover such processes or compositions. We recommend
that each prospective user test his proposed application before repetitive
use, using this data as a guide. This product may be covered by one or
more United States or foreign patents or patent applications.
Americas
Henkel Corporation
15350 Barranca Parkway
Irvine, CA 92618 U.S.A.
949.789.2500
Europe
Henkel Loctite Adhesives Ltd
Technologies House, Wood Lane End
Hemel Hempstead
Hertfordshire HP2 4RQ, United Kingdom
+44 (0) 1442 278 000
Asia
Henkel Loctite (China) Co. Ltd
No. 90 Zhujiang Road
Yantai Development Zone
Shandong, China 264006
+86 535 6399820
All trademarks, except where noted are the property of Henkel Corp.
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