TCFG_A Datasheet, PDF (12/13 Pages) Rohm – Chip tantalum capacitors (Fail-safe open structure type)

Tantalum capacitors
TCFG Series A Case
(10) Ultrasonic cleaning
Carry out cleaning under as mild conditions as possible. The internal element of a tantalum capacitor are larger than
those of a transistor or diode, so it is not as resistant as ultrasonic waves.
Example : water
Propagation speed
Solvent density
1500m / s
1g / cm³
Frequency and wavelength
Frequency Wavelength
20kHz
7.5cm
28kHz
5.3cm
50kHz
3.0cm
z Precautions
1) Do not allow solvent to come to a boil (kinetic energy increases).
Қ Ultrasonic output 0.5W / cm² or less
Қ Use a solvent with a high boiling point.
Қ Lower solvent temperature.
2) Ultrasonic cleaning frequency
28 kHz or less
3) Keep cleaning time as short as possible.
4) Move item being cleaned.
Standing waves caused by the ultrasonic waves can cause stress to build up in part of the item being cleaned.
Reference
Kin etic energy = 2 × π × frequency ×
2 × Ultrasonic output
propagation × speed × solvent density
Rev.D 12/12