a) VPS (Vapor Phase Soldering)
During VPS,the substrate is heated by an inert liquid with a high boiling point. The temperature of the capacitor’s body and the
temperature of the substrate are about the same as the atmosphere. This temperature should be below 240°C.
b) Near and Far IR Ray
Due to the heat absorption of the capacitor’s body, the internal temperature of the capacitors may be 20 ~ 30°C higher than the
setting temperature and may exceed 260°C.
Temperature control is crucial in maintaining a temperature of 260 °C or lower.
c) Convention Oven
An infrared ray is the main source of heat in this process. The temperature of the substrate and the capacitors can be maintained
at a similar level by the circulation of heated air, or an inert gas.
(2) Soldering with a Soldering Iron
Soldering with a soldering iron cannot be recommended due to the lack of consistency in maintaining temperatures and process
times. If this method should be necessary, the iron should never touch the capacitor’s terminals, and the temperature of the
soldering iron should never exceed 350°C. The application of the iron should not exceed 5 seconds.
(3) Please consult us for other methods.
8. Cleaning
Cleaning by organic solvent may damage capacitor’s appearance and performance.However, our capacitors are not effected even
when soaked at 20 ~ 30°C 2-propanol for 5 minutes. When introducing new cleaning methods or changing the cleaning term, please
consult us.
9. Protective Resin Coating
After components are assembled to substrate, a protective resin coating is sometimes applied. As this resin coating cures, it gives
mechanical and thermal stress to Tantalum capacitors. This stress can cause damage to the capacitors, which affects their reliability.
Before using a resin coating, proper research must be done in regards to the material and process to insure that excessive stress will
not be applied to capacitors and other components.
10. Vibration
Approximately 300 G shall be applied to a capacitor, when dropped from 1 meter to a concrete floor.
Although capacitors are made to withstand this drop test, stress from shock due to falling or striking does cause damage to the
capacitors and increases failure rates. Do not subject capacitors to this type of mechanical stress.
11. Ultrasonic cleaning
Matsuo does not recommend Ultrasonic cleaning. This may cause damage to the capacitors, and may even cause broken terminals. If
the Ultrasonic cleaning process will be used, please note the following:
(1)The solvent should not be boiled. (Lower the ultrasonic wave output or use solvent with The high boiling point.)
(2)The recommended wattage is less than 0.5 watts per cm2.
(3)The cleaning time should be kept to a minimum. Also, samples must be swang in the solvlent. Please consult us.
12. Additional Notes
· When more than one capacitor is connected in series, a resistor that can distribute the voltage equally to the capacitors shall be
connected in parallel.
· The capacitor cases shall not be cut even if the mounting space is insufficient.
· During a customers aging process, voltage should remain under the rated voltage at all times.
· Capacitors should never be touched or manipulated while operating.
· Capacitors are not meant to be dismantled.
· When testing capacitors, please examine the power source before conducting test to insure the tester’s polarity and applied voltage.
· In the event of a capacitor burning, smoking, or emitting an offensive smell during operation, please turn the circuit “off” and keep
hands and face away from the burning capacitor.
· If a capacitor be electrical shorted, it becomes hot, and the capacitor element may ignite.
In this case, the printed board may be burnt out.
· Capacitors should be stored at room temperature under low humidity. Capacitors should never be stored under direct sunlight, and
should be stored in an environment containing dust.
· If the capacitors will be operated in a humid environment, they should be sealed with a compound under proper conditions.
· Capacitors should not be stored or operated in environments containing acids, alkalis or active gasses.
· When capacitors are disposed of as “scrap” or waste, they should be treated as Industria Waste since they contain various metals and
polymers.
· Capacitors submitted as samples should not be used for production purposes.
These application notes are prepared based on “Guideline of notabilia for fixed tantalum electrolytic capacitors with solid electrolyte for
use in electronic equipment” (EIAJ RCR-2386) issued by Japan Electronics and Information Technology Industries Association (JEITA).
For the details of the instructions (explanation, reasons and concrete examples), please refer to this guideline, or consult our Sales
Department.