FR4, also written as FR-4, is both a name and a rating. The name is applied to the fiberglass-reinforced epoxy-laminated sheets used in printed circuit board manufacturing. However, the name also functions as a grade used to rate epoxy laminate sheets. The designation essentially indicates the base quality of a laminate sheet, meaning a variety of sheet materials and designs fall under the FR4 rating. The “FR” in the name stands for flame retardant, while the 4 differentiates the material from others of the same class.
The material widely referred to as FR4 is a composite structure. The most basic layer of the material is fiberglass woven into a thin, cloth-like sheet. The fiberglass gives FR4 its necessary structural stability. This innermost fiberglass layer is then surrounded and bound by a flame-resistant epoxy resin. This resin is what gives the material rigidity, among its other physical properties
FR4 sheets are widely popular among electrical engineers and designers as a PCB base material. The low cost and versatility of the material, as well as its wealth of beneficial physical properties, accounts for that popularity. FR4 sheets are electrical insulators with high dielectric strength. They also feature a high strength-to-weight ratio and are lightweight and resistant to moisture. Add this to their relative temperature resistance, and FR4 can perform well in most environmental conditions
FAQ
Q1: What's your minimum order quantity?
A1: Our MOQ is not the same based on different items. Small orders are also welcome.
Q2: what file we should offer?
A2: PCB:Gerber file is better,( Protel ,power pcb,PADs file); PCBA : Gerber file and BOM list.
Q3: What any other information should be offered except for file?
A3:Following specifications are needed for quotation:
a) Base material
b) Board thickness:
c) Copper thickness
d) Surface treatment:
e) color of solder mask and silkscreen
f) Quantity
Q4: Can you provide quick turn PCB?
A4:Yes,we can provide quick time service 1-2days.
