High Reliability 2-Layer PCB Design with RT/duroid 5880

For applications requiring robust, high-frequency circuit boards that can withstand extreme temperatures, Rogers Corporation's RT/duroid 5880 PTFE composite material is an excellent choice. Let's take a look at a recent 2-layer rigid PCB design utilizing RT/duroid 5880 and some of its key specifications and features.

Stackup and Material
The stackup for this board consists of:

1. 2 layers with 0.9mm total thickness
2. RT/duroid 5880 dielectric at 31 mil thickness
3. Exterior layers with 1 oz (1.4 mil) finished copper and 35μm thickness

RT/duroid 5880 is a glass-reinforced PTFE composite made for performance demanding RF/microwave and high-speed digital circuits. It offers a low dielectric constant of 2.20 for improved signal integrity. The glass weave provides outstanding dimensional stability over temperature fluctuations.

Board Construction Details
With its high frequency substrate material, this PCB is designed for reliability and precision at microwave frequencies. Some of the key construction details are:

1. Dimensions of 195mm x 182mm
2. 4/7 mil minimum trace/space
3. 0.25mm minimum hole size
4. 1 mil thick via plating
5. ENIG surface finish
6. No silkscreen layers
7. 100% electrical testing

Applications
The thermal range of -40°C to +85°C and lead-free construction make this PCB well-suited for harsh environment applications like:

1. Aerospace and aviation electronics
2. Military and defense systems
3. Automotive electronics
4. Oil and gas exploration equipment

For high-speed or high-frequency applications requiring stability across extreme temperatures, Rogers RT/duroid 5880 is an excellent PCB substrate choice. With robust stackup, trace spacing, and construction details, this 2-layer board exemplifies a precision microwave PCB design.