What Is an Ultrasonic Cleaner?
The machine PhoneDoctor uses to remove corrosion from water-damaged phone boards.
Definition: An ultrasonic cleaner is a professional device that uses 40,000Hz (40kHz) sound waves in a cleaning solution to agitate and dislodge corrosion, mineral deposits, and contamination from circuit boards. The sound waves create microscopic bubbles that implode — a process called cavitation — which scrubs surfaces including under chips where manual cleaning is impossible.
Why it’s the professional standard
Manual cleaning with isopropyl alcohol and a brush only reaches visible surfaces. Corrosion under BGA chips, beneath shielding, and inside micro connectors cannot be reached manually. Ultrasonic cleaning penetrates these spaces because the cavitation bubbles form and collapse everywhere the liquid touches — including under chips with 0.3mm solder balls. This is why phones that “seem fine” after basic cleaning can still fail: the corrosion under the chips was never removed.
How PhoneDoctor uses it
Step 1: Phone is opened and board removed, disconnecting the battery first.
Step 2: Board is inspected under microscope — visible corrosion and shorts are noted.
Step 3: Board is submerged in ultrasonic cleaner with a specialised cleaning solution for 5–10 minutes at 40kHz.
Step 4: Board is rinsed, dried thoroughly, and re-inspected. Remaining corrosion is addressed with flux and manual touch-up.
Step 5: Board is tested before reassembly.
Related terms
→ Corrosion — what ultrasonic cleaning removes from the board
→ Water Damage — the event that makes ultrasonic cleaning necessary
→ BGA — the chip packaging ultrasonic cleaning reaches under
→ Microsoldering — may be required after cleaning if chips were damaged
Phone got wet? Ultrasonic cleaning is the right fix.
PhoneDoctor uses professional ultrasonic cleaning on all water-damaged phones. Same-day treatment, free diagnostics.