How to Improve The Lead-Free Environmental Protection of PCB Board Design

According to the current situation, lead-free environmental protection is the topic that PCB and PCBA manufacturers discuss how to improve the most. It is also a technical challenge for manufacturing. XPCB has spent a lot of effort in conducting some research and discussion on PCB prototyping design, and has made the following progress:

1. Improvement of the establishment of the package library:

Due to the increase in lead-free soldering temperature, when building a library, the influence of the device pad on the soldering point temperature must be considered. At the same time, it is necessary to conduct experiments on the reliability of soldering and the heat resistance of the device to ensure that the size and shape of the pad, the size and shape of the solder mask, and the relationship between the stencil and the pad can meet the best soldering temperature.

2. Design methods and details processing:

Avoid welding tombstones, so the heating of the devices should be considered in the design to ensure that each device is heated evenly. Therefore, we have specially developed software to ensure the thermal balance of the device.

3. The choice of surface treatment method:

Different surface treatment methods have different cost and processing difficulty, so there are different surface treatment methods for different products. At the same time, some surface treatment methods have some subtle differences in packaging or design. For example, when the surface treatment method adopts OSP, the ICT test point needs to open the steel mesh, while other surface treatment methods do not have this requirement.

4. Identification description:

On the board that needs to be lead-free, add identification symbols for subsequent processing manufacturers to facilitate identification and processing.

XPCB Limited is a manufacturer specializing in the production of high-precision double-sided, multi-layer and impedance, blind buried vias, and thick copper circuit boards. The products cover HDI, thick copper, backplanes, rigid-flex combined, buried capacitance and buried resistance, Golden Finger and other types of circuit boards, which can meet the needs of customers for various products.