Panels on surface roughness evaluation of copper foil for high frequency PCB with confocal laser scanning microscope are exhibited. NewsTechnical informationPress Releases October 27, 2021
|Date of presentation, etc.||Oct 27 to 29, 2021|
|Location of presentation, etc.||JPCA Show 2021 （Tokyo Big Sight）|
|Title of presentation, etc.||Surface Roughness Evaluation of Copper foil for High Frequency PCB with Confocal Laser Scanning Microscope|
|Organization name (name of academic society, etc.)||Japan Printed Circuit Association (JPCA)|
As the 5th generation mobile communication system (5G) uses higher frequency bands than ever before, circuit board conductors are increasingly faced with skin effect problems.In other words, it is strongly influenced by the surface condition of the copper foil used for the circuit conductor. The surface texture of copper foil has long been evaluated with a stylus type roughness meter. However, the surface roughness of copper foil for high-frequency substrates is becoming finer than the stylus radius of stylus type roughness meters in many grades.We introduce a method for accurately evaluating the surface properties of copper foil for high-frequency circuit boards, and report on its effect on transmission characteristics.
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