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Analysis of Transmission Characteristics in Flexible Printed Circuit Boards
- Author(s)
- 양원모
- Advisor
- 박용배
- Department
- 일반대학원 전자공학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2021-02
- Language
- eng
- Keyword
- Drilled Prepreg; Effective Dielectric Constant; Flexible Printed Circuit Board (FPCB); Pre-treatment; Signal Attenuation
- Alternative Abstract
- Flexible printed circuit boards (PCB) are used to apply for bending position where cannot be implemented in rigid PCBs, and many studies related to a mechanical/physical reliability have been conducted. However, the progress of reliability studies in terms of electrical characteristics has also been begun because the role of the flexible PCB was expanded from simple cable to transmitting the signal of high speed and high frequency. The dielectric materials of a flexible PCBs is polymer that generated dielectric loss depend-ing on the frequency, so reducing the dielectric loss in the desired frequency is the most important factor to increase electrical reliability. When designing a transmission line that transmits in high-speed and electrical circuits, there are many references in the case of rigid PCBs, but there are not references in the case of flexible PCB about selecting materials, transmission line structures and manufacturing process. Therefore, in this study, the transmission characteristics are measured and analyzed using the DUT (Device Under Test) by reflecting various manufacturing options that determine the electrical characteristics of the flexible PCB and quantified. In addition, an idea that can be used not only for flexible PCBs but also for rigid- flex PCBs is proposed. This is a method of laminating after drilling vias only in the desired area on the prepreg without changing the material, so it has been shown that the effective dielectric con-stant can be partially lowered in the same layer.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Electronic Engineering > 4. Theses(Ph.D)
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