What's FR-4 PCB?
The printed circuit board adopts Fr-4 material is called Fr-4 PCB. In addition,FR stands for flame-retardant, the number"4"distinguishes from the samegrade of flame-retardant.
The glass fiber structure provides structural stability to the material, whichis covered with a flame-retardant epoxy resin. It brings durability & strong mechanical properties to the material.
Fr-4 PCB is the most popular board to be used in electronic products by designer, sincenot only its price and quality are economical, also meet the performance of most designs.
The commonly used PCB NEMA substrate grade classification:
According to different TG values, it can also be classified:
TG means Glass Transition Temperature. The higher the TG, the better the temperature resistance of the material.
Ordinary TG : 130 ℃ or more
Medium TG : about greater than 150 ℃
Advanced TG : generally greater than 170 ℃
FR-4 PCB is widely used in different industries：
-Military
-Communications
-Industrial instrumentation
-Automotive
-Consumer electronic
-Medical
Fr-4 PCB Capabilities
Board Layers: 1-20layers
Board Thickness: 0.1-4mm+_10%
Fr4 Board thickness: 1.34 thou to 3 in
Copper thickness: 1-12oz
Minimum trace: 3mil
Minimum vias: 0.015mm
Tolerance of PCB: 士5%
PCB Outline: Square,circle, irregular
Min Line/Space: 0.075/ 0.075mm
Suface Finish:HASL,HASL lead free, Immersion gold(ENIG), Immersion tin, Immersion silver, OSP
Solder Mask Color：Green/Black /Blue/ Yellow / Red /White
Fr-4 PCB Samples
STG has the ability to provide you high quality and quick turn arround Fr-4 circuit board with low cost
Reasons To Choose STG
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