The Significance of PCB in Electronic Products
A Printed Circuit Board (PCB) serves as the foundation for assembling components and electronic circuit board parts to create a functional module or finished product. It plays a pivotal role in integrating and connecting all the functions within an electronic product. When an electronic product malfunctions, the PCB is often the first component examined.
Advancements in PCB Technology
Advancements in materials, levels, and production processes have led to a wide range of PCB types and manufacturing methods. These advancements cater to the diverse requirements of various electronic products.
Double-Layer PCB Manufacturing Process
- Cutting and drilling
- Copper plating
- Surface plating
- Pattern transfer
- Pattern plating
- Etching
- Quality inspection
- Solder mask printing (green oil/white characters)
- Immersion gold
- Tin spray
- Gold plating
- V-CUT cutting
- Reliability testing
- Final quality control
- Packaging and shipment
Multi-Layer PCB Production
Similar to double-layer PCBs, multi-layer PCBs offer a variety of materials, levels, and production processes to meet the specific requirements of different electronic products.
Surface Treatment of PCB Copper
- Brushing
Ink Printing Process
- Screen printing ink with different mesh sizes, typically 77T or 57T
Pre-Baking Steps
- Varied ink parameters, typically at 75-80 degrees
Exposure Techniques
- Energy level of 10-12 during exposure
Development Process
- 55% development point
Quality Control Measures
- Visual inspection
Post-Curing Procedures
- At 150 degrees for 60 minutes
PCB Production Processes
The PCB production process is categorized into single-panel processing, double-panel processing, and multi-layer board processing. In addition to traditional rigid boards, there is a growing demand for flexible boards like Flexible Printed Circuits (FPC). Various processes are involved in manufacturing flexible PCBs, including single-layer FPC and multi-layer FPC.
