Copper roughness has an impact on high-speed digital designs. Choose your copper wisely!

In this episode, circuit materials expert John Coonrod of Rogers Corporation shares his extensive knowledge on copper roughness. Watch this episode or listen on the go; it will help a PCB designer make a sound decision about picking the most suitable copper to use on your next design.

Altium 365: Where the World Designs ElectronicsWatch the video, click here.

Show Highlights:

Introduction, John Coonrod’s  role, expertise, and experience in the Rogers lab

How the two basic types of copper are made (Rolled and ED) electric deposit (check out the slide)

Copper overview

Surface Roughness, the rougher the copper, the more the bond area

Copper Treatments

What is a reverse treat? The benefits, thermal properties, and adhesion

IPC classifications of Low Profile (LP), Very Low Profile (VLP)

Surface roughness for different types of copper and different types of surface roughness measurement units (check out the slides)

Best practices when selecting a material

Normal variations of copper for thickness, roughness, and etching differences

Copper roughness impact on high-speed digital designs

Copper roughness impact on RF concerns

Future MMW 9 micron copper

Links and Resources:

Rogers Advanced Connectivity Solutions Website

Rogers (Free) Technology Support Hub

DesignCon 2021 August 17-19, San Jose, CA

PCB West 2021 October 5-8, Santa Clara, CA

Copper Foils for High-Frequency Circuit Materials

Different Copper Foils for Different Reasons

Choosing Copper Foils for High-Frequency PCBs

Materials for High Speed Interconnects: Physics & Chemistry of Copper Clad Laminates

How Copper Properties Impact PCB RF and High-Speed Digital Performance

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Altium 365: Where the World Designs Electronics