Pcba maker fr4 94v0 pcb
|Material||Laminate material||FR4, Alu, CEM3,Taconic,Rogers|
|Board cutting||Number of layers||1-58|
Min.Thickness for inner layers
(Cu thickness are excluded)
|Bow and twist||<7/1000|
|Copper weight||outer Cu weight||0.5-4 oz|
|inner Cu weight||0.5-3 oz|
|PTH hole tolerance||±0.002''(0.005mm)|
|NPTH Hole tolerance||±0.002''(0.005mm)|
|Plating||Min hole size||0.0008''（0.02mm）|
|Aspect ratio||20(5 :1)|
|Min solder mask clearance||0.003''(0.07mm)|
|E-test||Flying probe tester||Y|
|Impedance tester||Tektronix TDS8200|
|Surface finish||HASL,ENIG,immersion silver，immersion tin, OSP....|
Fr-4, also known as FR-4 or FR4, represents a flame retardant, and four represent a class of materials used. Fr-4 is both a name and a rating. It is used as a name when manufacturing PCB and fiberglass reinforced epoxy laminates. As a rating, Fr-4 is used for the classification of epoxy laminates as an indicator of its quality.
If you work with FR4 2 Layer PCB For Power Bank often, you are probably familiar with Fr-4 materials. It is a popular PCB base material because it is the main component used to make rigid boards.
The Fr-4 material is a structure mainly composed of glass fibers woven into a thin sheet of cloth. Glass fiber makes Fr-4 a solid foundation for the manufacture of rigid boards. It is enclosed in refractory epoxy and is a source of rigidity.
One of the other reasons why Fr-4 is popular is due to the low cost and versatility of its materials. The FR-4 board has a large dielectric strength as an electrical insulator. In addition, they are lightweight, water and heat resistant, and in short, it is a material suitable for various environmental conditions.