2024年4月16日发(作者：)

pcb玻纤板热导率

英文回答：

Thermal Conductivity of FR-4 PCB.

FR-4 is a type of glass-reinforced epoxy laminate that

is commonly used in printed circuit boards (PCBs). It is a

strong and durable material with good electrical and

thermal properties. The thermal conductivity of FR-4 is

typically between 0.25 and 0.5 W/m-K.

The thermal conductivity of a material is a measure of

its ability to conduct heat. A higher thermal conductivity

means that the material is better at conducting heat. FR-4

has a relatively low thermal conductivity, which means that

it is not very good at conducting heat. This can be a

disadvantage in some applications, such as when the PCB is

used in a high-power application.

There are a number of factors that can affect the

thermal conductivity of FR-4, including the type of glass

fiber used, the amount of glass fiber in the laminate, and

the thickness of the laminate. The type of glass fiber used

can have a significant impact on the thermal conductivity.

For example, quartz glass fiber has a higher thermal

conductivity than E-glass fiber. The amount of glass fiber

in the laminate can also affect the thermal conductivity. A

laminate with a higher percentage of glass fiber will have

a higher thermal conductivity. The thickness of the

laminate can also affect the thermal conductivity. A

thinner laminate will have a higher thermal conductivity

than a thicker laminate.

中文回答：

PCB 玻纤板的热导率。

FR-4是一种常见的印刷电路板（PCB）用玻璃纤维增强环氧树

脂层压板。它是一种强度高、耐用且具有良好电气和热性能的材料。

FR-4 的热导率通常在 0.25 至 0.5 W/m-K 之间。

材料的热导率是衡量其传热能力的指标。热导率越高，表示材

料传热能力越好。FR-4 的热导率相对较低，这表示其传热能力不是

很好。在某些应用中这可能会成为缺点，例如当 PCB 用于高功率应

用时。

有多种因素会影响 FR-4 的热导率，包括所用玻璃纤维的类型、

层压板中玻璃纤维的含量以及层压板的厚度。所用玻璃纤维的类型

会对热导率产生重大影响。例如，石英玻璃纤维的热导率高于 E 玻

璃纤维。层压板中玻璃纤维的含量也会影响热导率。玻璃纤维含量

较高的层压板热导率较高。层压板的厚度也会影响热导率。较薄的

层压板比较厚的层压板具有更高的热导率。