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Stages Precautions Technical considerations
8.Storage
Condition
s
Storage
1. To maintain the solderability of terminal
electrodes and to keep the packaging
material in good condition, care must be
taken to control temperature and humidity
in the storage area. Humidity should
especially be kept as low as possible.
Recommended conditions
Temperature 0 40
Humidity Below 70% RH
The room temperature must below 40 .Even under ideal storage conditions capacitor electrode solderability
decreased as time passes, so ceramic chip capacitors should be used within 6 months from the time of
delivery.
The packaging material should be kept where nochlorine or sulfur exist in the air.
2.The capacitance value of high dielectric constant capacitors (type 2&3) will gradually decrease with the
Passage of time, so this should be taken into consideration in the circuit design. If such a capacitance
reduction occurs, a heat treatment of 150 for 1 hour will return the capacitance to its initial level.
1. If the parts are stored in a high temperature
and humidity environment, problems such as
reduced solderability caused by oxidation of
terminal electrodes and deterioration of
taping/packaging materials may take place. For
this reason, components should be used within
6 months from the rime of delivery. If exceeding
the above period, please check solderability
before using the capacitors.
6.Post
cleaning
Processes
With some type of resins a decomposition gas
or chemical reaction vapor may remain inside
the resin during the hardening period or even
while left under normal storage conditions
will result in the deterioration of the
capacitor s performance.
1. When a resin s hardening temperature
is higher than the capacitor s operating
temperature. The stresses generated by the
excess heat may lead to capacitor damage
or destruction. The use of such resins
molding materials is not recommended.
7. Handling Breakaway PC boards (splitting along
perforations)
1. When splitting the PC board after
mounting capacitors and other components,
care is required so as not to give any
stresses of twisting to board.
2. Board separation should not be done
manually, but by using the appropriate
devices.
Mechanical considerations
1. Be careful not to subject the capacitors to
excessive mechanical shocks.
(1) If ceramic capacitors are dropped onto the floor
or a hard surface, they should not be used.
(2) When handling the mounted boards, be careful that
the mounted components do not come in contact with
or bump against other boards or components.
160
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