IT3/IT5
Connector System
PWB
A
SSEMBLY
N
OTES
Document Number:
ETAD-F0458
Revision 3.10
Page
38
of
73
8.2 Saponifiers
All solder pastes that are classified as water soluble or water washable may be cleaned
effectively with hot water alone, but
their solubility greatly improves
if saponifiers are added
to the cleaning bath. Consult with solder paste supplier for compatible cleaning agents and
appropriate concentrations. Prior to using any type of cleaning chemistry or solvent, review
the manufacturer’s instructions for use and its effects on metals or plastics, and consult with
the cleaning equipment manufacturer for system compatibility.
Precaution:
When using water soluble solder pastes, it is extremely important to completely
remove all flux residues from the assembly. Water soluble fluxes contain organic acids
that are active at room temperature, and other ionic substances that can cause
corrosion and/or electrochemical migration.
Incomplete removal of water soluble
flux residue can result in premature failure of the assembly in its service
environment.
8.3 No-Clean Solder Process
No-Clean solder pastes are designed to be left on the circuit board. If reflowed properly, the
residues will not interfere with circuit function. Many no-clean fluxes contain rosin, which is
not water soluble
. If cleaning of no-clean flux residue
is desired,
cleaning agents must be
used
. Contact solder paste supplier for compatible cleaning agents and appropriate
concentrations. As with any cleaning chemistry, review the manufacturer’s instructions for
use and its effects on metals or plastics, and consult with the cleaning equipment
manufacturer for system compatibility
The
IT3/IT5
receptacle has passed compatibility testing with IPA
Note:
In high frequency applications (>30 GHz), some no-clean flux residues can interfere with
signal integrity and may require cleaning. Contact solder paste manufacturer for information
on high frequency compatibility.
Precaution:
When using organic solvents or water type cleaners, any residual flux or
cleaning agent that remains on the assembly can deteriorate the electrical
performance of the connector and/or cause permanent damage.
PWB and
components should be completely clean and dry before they are energized.
Nov.1.2022 Copyright 2022 HIROSE ELECTRIC CO., LTD. All Rights Reserved.
