Application of Laser Soldering Technology in Automotive Pressure Sensor Manufacturing

Application of Laser Soldering Technology in Automotive Pressure Sensor Manufacturing

Automotive pressure sensors are devices that detect pressure in engines, braking systems, steering hydraulic circuits, and air supply systems, primarily composed of sensing elements and signal processing circuits. When the vehicle starts or moves, the sensors automatically monitor pressure in relevant hydraulic systems, convert the data into electrical signals, and transmit them to the vehicle control module. This enables real-time monitoring and automatic control of vehicle safety performance and fuel efficiency.

As the automotive industry advances toward greater intelligence and electrification, requirements for sensor precision, reliability, and miniaturization continue to increase, driving innovation in welding technologies—particularly the widespread adoption of laser soldering applications.

Illustration of Ceramic Capacitive Pressure Sensor Module

Laser soldering technology is widely used in the automotive industry, particularly in auto component manufacturing. It finds extensive applications in automotive sensor soldering, including:

• Air pressure sensor soldering

• Oil pressure sensor soldering

• Engine sensor soldering

• Air conditioning pressure sensor soldering

Applications in Automotive Pressure Sensor Manufacturing:

1. Capacitive pressure sensors: Soldering pressure-sensitive elements (such as ceramic or silicon piezoresistive components) to ceramic substrates or connectors

2. Pressure sensor housing encapsulation: Laser soldering ensures reliable hermetic sealing for sensors operating in harsh environments

3. Temperature sensors: Enables precision control over solder joints in engine temperature sensors, guaranteeing measurement accuracy and stability

Songsheng Optoelectronics Constant-Temperature Laser Soldering System integrates:

• Real-time temperature feedback system

• CCD coaxial alignment system

• Semiconductor  laser unit 

Songsheng Optoelectronics Constant-Temperature Laser Soldering System is composed of a real-time temperature feedback system, CCD coaxial alignment system, and semiconductor laser unit. Featuring an innovative PID-based online temperature regulation feedback system, it effectively maintains constant-temperature soldering while providing real-time high-precision temperature control of soldering targets, ensuring superior soldering yield rates and micron-level precision. This system is particularly suitable for high-precision soldering applications requiring strict temperature control.

Diagram of Songsheng Optoelectronics Constant-Temperature Laser Soldering System

Features of Songsheng Optoelectronics Laser Soldering System:

1. High laser processing precision with minimum spot diameter of 0.1mm, capable of soldering micro-pitch mounted components and chip parts.

2. Localized short-duration heating minimizes thermal impact on substrates and surrounding components, while different heating specifications can be implemented according to component lead types to achieve consistent soldering quality.

3. No soldering iron tip consumption or heater replacement required, enabling highly efficient continuous operation.

4. High-precision laser processing with micron-level laser spots, programmable control of processing time/power, and far superior accuracy compared to traditional soldering irons. Capable of soldering in spaces less than 1mm.

5. Multiple coaxial optical paths with CCD positioning, offering WYSIWYG (what you see is what you get) operation without repeated visual alignment corrections.

6. Non-contact processing eliminates stress caused by contact soldering and prevents static electricity.

7. Laser as green energy provides the cleanest processing method with no consumables, simple maintenance and easy operation.

8. Crack-free solder joints when performing lead-free soldering.

In summary, in automotive pressure sensor applications, laser soldering not only improves product quality and reliability, but also promotes sensor miniaturization and integration, providing strong support for technological innovation and product optimization in the automotive industry. With continuous technological advancements, we can expect laser soldering to play an even greater role in automotive sensor manufacturing.