材料科学
电介质
亚苯基
复合材料
乙醚
热稳定性
聚合物
介电损耗
高分子化学
化学工程
光电子学
有机化学
化学
工程类
作者
Y. BAN,Jihun Lee,Hyunseong Shin,Seong‐Dae Park,Hyun-Seung Yang
标识
DOI:10.1002/marc.202400777
摘要
Abstract With the increasing demand for high‐performance printed circuit boards (PCBs) in the 6G communication era, dielectric substrate materials must exhibit a low dielectric constant (D k ), low dielectric loss (D f ), and high dimensional stability. In this study, a series of bismaleimide‐incorporated poly(phenylene ether) resins (PPE‐BMI) with varying bismaleimide (BMI) crosslinker contents is developed, exhibiting significantly enhanced dielectric properties and dimensional stability, owing to the restricted polymer chain mobility and increased crosslinking density. Dielectric property measurements reveal that the PPE‐BMI resins exhibit low D k and D f values at frequencies above 100 GHz, while maintaining an excellent dielectric performance even after an 85 °C/85% relative humidity reliability test. A significant reduction in the coefficient of thermal expansion is observed with an increase in the BMI content. Molecular dynamics simulations are employed to clarify the role of BMI crosslinkers in reducing the free volume, enhancing the crosslinking in the PPE (poly(phenylene ether)) matrix, and influencing the thermophysical properties of PPE‐BMI. The infiltration of PPE‐BMI into glass fabrics and liquid crystal fabrics highlights their potential for practical use in advanced PCB applications operating at high frequencies.
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