What is the dielectric constant of FR4?

What is the dielectric constant of FR4?

3.8 to 4.8
The dielectric constant of FR4 ranges from 3.8 to 4.8, depending on the glass weave style, thickness, resin content, and copper foil roughness.

Is FR4 a dielectric?

Glass Epoxy (G10, FR4) Characteristics Epoxy resins are widely used in electronic applications because they are virtually impervious to moisture. As a thermoset material, glass epoxy has outstanding mechanical and electric strength as well as good dielectric properties.

Is FR4 conductive?

FR-4 has a poor thermal conductivity of 0.25 W / m-K; the thermal insulance factor of a 0.7-mm FR-4 layer is 2040°C-mm2 / W.

What is the disadvantage of using FR4 based PCB?

But, these days, for many companies in the LED industry, metal core PCBs (MCPCBs) are the new standard. The main reason for this switch is that traditional FR4 PCBs generate more heat, which has an adverse effect on the functioning of the LEDs.

What is the green layer on PCB?

solder mask
The only green part is the outer covering of resin called the solder mask or solder resist/oil. This is a hardened resin with colored pigments that is applied to the boards in a silkscreen fashion.

What kind of material is a FR4 dielectric material?

The designation “FR4” refers to the flame-retardant properties of the dielectric material and type-4 woven glass-reinforced epoxy laminate used to build up the substrate. This type of laminate material is highly insulating and rigid, and every manufacturer should know how to work with FR4 laminates as a base material.

What does fr 4 stand for in Science category?

FR-4 (or FR4) is a NEMA grade designation for glass-reinforced epoxy laminate material. FR-4 is a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (self-extinguishing). “FR” stands for flame retardant, and denotes that the material complies with the standard UL94V-0.

What is the thermal conductivity of FR 4?

Properties Parameter Value Thermal conductivity, in-plane 0.81 W/ (m·K), 1.059 W/ (m·K) Rockwell hardness 110 M scale Bond strength > 1,000 kg (2,200 lb) Flexural strength (A; 0.125 in) – LW > 415 MPa (60,200 psi)

What kind of material is FR-4 fire resistant?

FR-4 is a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (self-extinguishing).