On the PCBA production line, there is a seemingly inconspicuous but crucial process - SPI inspection. It is like a strict "quality guard" that controls the quality of solder paste printing before component mounting. Today, let us get to know this "invisible guardian".

1. What is SPI inspection?

SPI (Solder Paste Inspection), known as solder paste inspection in Chinese, is a key quality control link in SMT surface mounting technology. It uses advanced 3D optical inspection technology to conduct a full-scale "physical examination" of the solder paste printed on the PCB pad.

2. How does SPI protect PCBA quality?

Precise measurement

Using laser or structured light technology

Accurately measure the height, volume, and area of solder paste

Accuracy can reach ±1 micron

Comprehensive detection

Detect the printing position of solder paste

Measure the thickness uniformity of solder paste

Check the shape integrity of solder paste

Real-time feedback

Detection speed can reach 0.2 seconds/point

Instantly display the defect location

Automatically generate detection report

3. Five core values of SPI

Quality assurance

Prevent welding defects such as cold solder joints and short circuits

Improve product reliability

Reduce after-sales repair rate

Cost control

Reduce rework and scrapping

Save manual inspection costs

Reduce quality loss

Efficiency improvement

Fully automatic high-speed inspection

No manual intervention required

Seamless connection with production line

Process optimization

Provide detailed solder paste data

Help improve steel mesh design

Optimize printing parameters

Process traceability

Record the inspection data of each board

Support quality traceability

Meet customer audit requirements

4. Typical application scenarios of SPI detection

High-density PCB board production

Micro-pitch component mounting

Automotive electronics manufacturing

Medical equipment PCBA aerospace electronic products

5. How to choose the right SPI equipment?

Select the detection accuracy according to the product accuracy requirements

Consider the production line beat matching detection speed

Evaluate the equipment stability and maintenance cost

Choose easy-to-use operating software

Pay attention to after-sales service support

As electronic products develop towards miniaturization and high density, the importance of SPI detection in PCBA production is becoming increasingly prominent. It is not only a quality inspection process, but also a key link in achieving intelligent manufacturing and quality control. Choosing high-quality SPI equipment and establishing a complete solder paste inspection standard will escort your PCBA production quality.

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