Surface-mount components on a USB flash drive's circuit board. The small rectangular chips with numbers are resistors, while the unmarked small rectangular chips are capacitors.
Surface-mount components are tiny and require microsoldering to fit. If youre reading this, we assume you know the size of regular resistors, capacitors and so on.
Surface Mount Repair Issues. A key issue is to know, on a real-time basis if possible, what is happening to the temperatures of the component and board.

Repacking for Shipment. Electrostatic Discharge (ESD) Precautions. Surface Mount Repair. To Replace the Power-Line Fuse. To Disconnect the Output Using an External Relay.
Intended for hobby and repair applications, Wire Glue is the first in a series of adhesive products based on microcarbon from Anders.Repair Surface Mount Boards without Soldering.

Such details provide a deeper understanding and appreciation for Surface Mount Repair.
The last page of this guide illustrates a number of common soldering problems with advice on prevention and repair. Surface Mount Components.
Surface mount repair is simpler in that no through-hole solder must be removed. Solder flux is used chemically to clean both the component lead and the solder.