SMT is the abbreviation of English Surface-mount technology, translated
into surface assembly technology, is an electronic assembly technology, which is
to install electronic components, such as resistors, capacitors, transistors,
integrated circuits, etc. on the printed circuit board, and Electrical bonding
is formed by brazing. The components used are also referred to as surface-mount
devices (SMD). The biggest difference from the through-hole technology is that
the surface mount technology does not require a corresponding through hole for
the component pins, and the surface mount technology has a much smaller
component size than the through-hole technology. By applying surface mount
technology, the overall processing speed can be increased, but the risk of
defects in the board is increased due to the miniaturization of parts and the
increase in density. Therefore, in any board manufacturing process of surface
mount technology, error detection has become A necessary part.
SMT production workshop
SMT production process:
PCB board - solder paste printing - solder paste inspection - high speed
patch - multi-function patch - reflow oven - automatic optical inspection -
manual visual inspection and maintenance
The equipment used is:
Plate feeder: The PCB board of the hole is fed into the solder paste
printer through the plate feeder.
Solder paste printing machine: Solder paste is printed on the PCB board
Solder paste detector: Check whether the solder paste is printed correctly,
whether there is any missing or misprinted.
Mounter: The process of placing components on a specified PCB board through
Reflow oven: The process of soldering components to a PCB board through a
Automatic optical inspection machine: mainly check whether various mounting
or welding on the PCB is wrong.
The whole process of SMT basically adopts machine automation production,
manual operation and visual inspection, and there are not many production