What is a patch?

Patch refers to patch components, leadless components and surface-mounted components, which are usually welded automatically by machines, but a few of them are done by hand.

Two-finger patch technology, the work of soldering patch components on the circuit board. Usually done by mounter, which can be done manually, semi-automatically or fully automatically.

QC: Total Quality Management, a quality management method introduced from Japan more than 20 years ago, and QC management group: a group established within a team to improve quality.