OEM Electronic Manufacturer 94v-0 PCB Shenzhen Standard ipc PCB Board Green
FR4 properties and materials
FR4 is a standard defined by the NEMA (National Electrical Manufacturers Association) for a glass-reinforced epoxy resin laminate.
FR stands for “flame retardant” and indicates that the material is compliant with the UL94V-0 standard on plastic material inflammability. The 94V-0 code can be found on all FR-4 PCBs. It guarantees the non-propagation of fire and its rapid extinguishing when the material burns.
Its glass transition (TG) is of the order of 115°C to 200°C for the High TGs or HiTGs depending on the manufacturing methods and the resins used. A standard FR-4 PCB will have a layer of FR-4 sandwiched between two thin layers of laminated copper.
FR-4 uses bromine, a so-called halogen chemical element that is fire resistant. It replaced G-10, another composite that was less resistant, in most of its applications.
FR4 has the advantage of having a good resistance-weight ratio. It does not absorb water, keeps high mechanical strength and has a good insulating capacity in dry or humid environments.
Product Description:
| Article | Description | Capability |
| Sercive | PCB and SMT assembly with one-stop service |
| Material | Laminate materials | FR4, high TG FR4, high frequency, alum, FPC |
| Board cutting | Number of layers | 1-48 |
| Min.thickness for inner layers (Cu thickness are excluded) | 0.003”(0.07mm) |
| Board thickness | Standard | (0.1-4mm±10%) |
| Min. | Single/Double:0.008±0.004” |
| 4layer:0.01±0.008” |
| 8layer:0.01±0.008” |
| Bow and twist | 7/1000 |
| Copper weight | Outer Cu weight | 0.5-4 0z |
| Inner Cu weight | 0.5-3 0z |
| Drilling | Min size | 0.0078”(0.2mm) |
| Drill deviation | ±0.002″(0.05mm) |
| PTH hole tolerance | ±0.002″(0.005mm) |
| NPTH hole tolerance | ±0.002″(0.005mm) |
| Solder mask | Color | Green,white,black,red,blue… |
| Min solder mask clearanace | 0.003″(0.07mm) |
| Thickness | (0.012*0.017mm) |
| Silkscreen | Color | white,black,yellow,blue… |
| Min size | 0.006″(0.15mm) |
| E-test | Function Test | 100% Functional test |
| PCBA Testing | X-ray,AOI Test,Functional test |
| Pcb assembly | one-stop service electronic manufacxturer service |
| Component sourcing | Yes |
| Certificate | IATF16949, ISO13485, ISO9001 |
| Delivery time: | PCB | 3-12days |
| PCBA | 8-20days |
| Tolerance of pcb | ±5% |
| Max size of finish board | 450*450mm |
| MOQ | NO MOQ (1pcs) |
| Surface Finish | HASL,ENIG,immersion silver,immersion tin,OSP… |
| PCB outline | Square,circle,irregular(with jigs) |
| package | QFN,BGA,SSOP,PLCC,LGA |
| Sub-assembly | Plastic,metal,screen |
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