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Influence of Copper Conductor Surface Treatment for High Frequency PCB on Electrical Properties and Reliability

Published:

February 13, 2019

Author:

Seiya Kido, Tsuyoshi Amatani

Abstract:

Development of information and telecommunications network is outstanding in recent years, and it is required for the related equipment such as communication base stations, servers and routers, to process huge amount of data in no time. As an electrical signal becomes faster and faster, how to prevent signal delay by transmission loss is a big issue for Printed Circuit Boards (PCB) loaded on such equipments. There are two main factors as the cause of transmission loss; dielectric loss and conductor loss. To decrease the dielectric loss, materials having low dielectric constant and low loss tangent have been developed. On the other hand, reducing the surface roughness of the copper foil itself to be used or minimizing the surface roughness by modifying surface treatment process of the conductor patterns before lamination is considered to be effective in order to decrease the conductor loss. However, there is a possibility that reduction in the surface roughness of the conductor patterns will lead to the decrease in adhesion of conductor patterns to dielectric resin and result in the deterioration of reliability of PCB itself.

In this paper, we will show the evaluation results of adhesion performance and electrical properties using certain type of dielectric material for high frequency PCB, several types of copper foil and several surface treatment processes of the conductor patterns. Moreover, we will indicate a technique from the aspect of surface treatment process in order to ensure reliability and, at the same time, to prevent signal delay at the signal frequency over 20 GHz. ...

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Company Information:

MEC Company Ltd.

R&D, production and sales of chemicals, equipment and related materials used in the production of PCB

Hyogo, Japan

Manufacturer of Assembly Material

  • Phone +81-6-6401-8160
  • Fax +81-6-6401-8165

MEC Company Ltd. website

Company Postings:

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