Efficient Solution High Density Circuit for SMT Assembly of Wearable Devices

♦ What Is SMT Assembly?

SMT assembly (Surface Mount Technology, surface mount technology) is the core process of electronic manufacturing, directly to the micro electronic components mounted on the surface of the PCB board welding, to achieve miniaturisation of electronic products, high-performance production.

♦ Characteristics of SMT Assembly:

• Mounted on the surface: components are directly mounted on the PCB surface (no need to punch holes), saving space and making the board thinner and lighter.

• Ultra-small components: supports tiny components with 0.2mm pitch (e.g. mobile phone chips, resistors), suitable for high-density circuits.

• Fully automatic production: the mounter can paste dozens of components per second, high efficiency, suitable for mass production.

♦ Core Steps of SMT Assembly:

1. Printing solder paste: Brush a layer of solder paste (solder + flux) on the PCB pads.

2. Paste the components: the mounter precisely paste the components to the position of the solder paste.

3. Reflow soldering: Heat to melt the solder paste, cool and fix the components.

4. Inspection: Check the quality of soldering by machine, defective products can be returned for repair.

♦ Core Application Scenarios of SMT Technology:

1. Consumer Electronics Field
   SMT technology supports the miniaturisation needs of smartphones, TWS headsets and other devices, which can accurately mount 01005 ultra-small components (0.4×0.2mm), realise high-density integration, such as 5G modules and multi-chip stacking.Helping to make devices thinner and lighter (e.g. mobile phones under 5mm).

2. Automotive Electronics and Medical Devices
   has passed automotive grade (AEC-Q100) and medical grade (ISO 13485) certifications to meet the high reliability requirements of in-vehicle ECUs and medical monitors, and automated reflow soldering ensures solder joint consistency (voidingrate <5%), adapt to high temperature and vibration environment.

3. Industrial Internet of Things
   Supports anti-interference mounting of industrial robots, smart sensors and other devices, achieving both miniaturisation and stability.

♦ SMT Line Configuration of DQS:

PCBA Prototype	Industrial Control PCBA	Telecom PCBA	Medical PCBA
Automotive PCBA	Consumer Electronic PCBA	LED PCBA	Security PCBA