What is microsoldering on a phone?

Microsoldering is the repair of a phone logic board at a microscopic scale. It involves removing and replacing individual chips, fixing broken solder joints, and repairing damaged copper traces using a microscope, hot air station, and fine-tip soldering iron. It enables chip-level repair rather than full board replacement.

Can all phone repair shops do microsoldering?

No. Microsoldering requires specialist equipment including a microscope, hot air station, and BGA rework tools, plus significant training. Most basic repair shops only replace whole components like screens and batteries. Chip-level microsoldering is offered by a smaller number of specialist repair shops.

What Is Microsoldering? - BreakFixNow | Laptop & Phone Repair Singapore

Definition: Microsoldering is a specialist repair technique performed under a microscope on a phone’s logic board. It involves removing and replacing individual chips, repairing broken solder joints, and bridging damaged copper traces — enabling chip-level repair instead of full board replacement.

Why it matters for phone repair

Microsoldering separates a basic repair shop from a specialist board repair shop. Without it, the only option for most board faults is a full board replacement — expensive, data-destroying, and often quoted as “unrepairable.”

How it works

Three main tools are required: a stereo microscope (7–45x magnification), a hot air rework station to reflow or remove BGA chips, and a fine-tip soldering iron for component-level work.

Shareable fact: BGA solder balls on an iPhone logic board can be as small as 0.2mm — about twice the width of a human hair. A microscope is non-negotiable.

Real example

An iPhone 12 is quoted by Apple at $650 for a board replacement. BreakFixNow diagnoses a single failed Power IC with a cold solder joint from a drop. Reflowing and reseating takes 45 minutes. Phone fully restored, no data loss, no board replacement.

Common mistakes

Accepting “board needs replacing” without a microsoldering opinion. Many single-chip failures are fixable for far less than a board swap.
DIY attempts on logic board repair. Without a microscope and proper tools, DIY soldering causes irreversible damage.
Not asking about data preservation. Microsoldering repairs the board with data intact. Board replacement loses everything.

Related terms

Logic Board — the board microsoldering is performed on
BGA — the chip packaging format that makes microsoldering necessary
Reballing — the advanced technique of replacing all solder balls on a BGA chip
Power IC — one of the most common targets of microsoldering repair

Why it matters for phone repair

How it works

Real example

Common mistakes

Related terms

Further reading