Dec 6, 2022 · Read our guide to low-Dk PCB materials like PTFE and low-loss FR4. These materials can be useful in high-speed designs, mixed signal, and RF systems.

Aug 12, 2021 · High-frequency products require low DK because the signal transmission speed at high frequencies is inversely proportional to the square root of DK. For microwave applications, the high-frequency PCBs should have low Df and DK of 2 to 4 at 1MHz .

May 19, 2023 · 公隆化學提供各種低介電常數Low Dk材料，協助您開發符合趨勢的產品。 在5G高頻通訊的快速發展，以及未來萬物聯網的科技浪潮下，降低電子產品的介電常數，使用低介電常數（low K）材料成爲減少信號遲滯時間的重要手段。 顧名思義，低介電常數材料就是指介電常數 ε低的電介質材料。 其介電常數可分別歸類爲：ε>3.0，ε=2.5～3.0，和ε<2.2（超低介電常數）。 低介電常數材料按材料特徵可分爲無機物和有機高分子兩大類。 無機粉體具有高穩定性、低收縮 …

Dec 28, 2022 · It is advised to choose a hybrid stack-up of high and low Dk PCB materials to balance power and signal integrity. A higher dielectric substrate can be used to separate the power and ground layers, while a lower Dk substrate …

低介電係數材料 （low-K材料）是當前 半導體 行業研究的熱門話題。 通過降低積體電路中使用的 介電 材料的 介電係數，降低導線之間的電容效應，降低積體電路發熱等等。 低介電係數材料的研究是同高分子材料密切相關的。 傳統半導體使用 二氧化矽 作為介電材料， 氧化矽 的介電係數約為4。 真空 的介電係數為1，乾燥 空氣 的介電係數接近於1。 在電子技術不斷發展的今天，微電子工業一直以來仍舊基本保持著莫耳定律的正確性。 為了提高積體電路的效能和速度，越來越 …

Nov 17, 2022 · In order to balance power and signal integrity, it is advised to opt for a hybrid stack-up of high and low Dk PCB materials. A higher dielectric constant substrate can be used for separating the power and ground layer whereas the lower …

Mar 27, 2020 · What is a Low-Dk PCB Material? A low-Dk PCB material has a low dielectric constant (real part). The term "Dk" refers specifically to the real part of the dielectric constant (i.e., the refractive index), while the term "Df" refers to the imaginary part.

There are two very common reasons why basic design guides will recommend low-Dk PCB materials. These two common reasons have to do with signal integrity: are needed. Justification #2: Lower Dk laminates create lower losses that are desirable in advanced systems.

Jul 5, 2023 · Today, designers of high-speed digital boards and RF products can choose from dozens of controlled-Dk and low-loss PCB materials. Many laminate suppliers have developed proprietary resin systems. Use a Low Dk and tan(δ) Material to Reduce Losses. For a low-loss transmission line, the dielectric loss in dB per inch is given by the following ...

The low Dk/Df testing is an ongoing project, with a goal of developing materials for PWB applications as well as for other electronic applications. The preliminary resin system described here shows the promise that these new systems can be …