FR4 copper clad is short of glass fiber epoxy resin copper clad laminates. FR4 sheet is divided into the following:
The first: FR - 4 A1 copper clad
This grade is mainly used military-industrial complex, communications, computers, digital circuit, industrial instrumentation, automotive circuits and other electronic products. The quality of this series of products completely achieve world-class level, the highest level, one of the best product performance.
Second: FR - 4 A2 grade copper clad
This class is mainly used for ordinary computers, instruments and meters, senior home appliance products and general electronics products. This series of copper clad apply more extensive, various performance indicators can meet the needs of the general industrial electronic products. Have a very good price performance ratio. To enable customers to effectively improve the price competitiveness.
Third: FR - 4 grade A3 sheet
This grade copper clad is the company specifically for the home appliance industry, computer peripheral products and ordinary electronic products (such as toys, calculators, game consoles, etc.) product development and production of FR - 4. Its characteristic is that meet the requirements under the premise of performance, competitive price
Fourth: FR - 4 A4 sheet
This level of plank is FR - 4 copper clad bottom material. But still can meet the technical specifications ordinary household appliances, computers, and the needs of the general electronic products, the most competitive price, cost performance is quite good also.
Fifth: FR - 4 B copper clad
This plank is relatively worse grade, quality stability is poorer, does not apply to the circuit board products with larger area, generally applicable size 100 mmx200mm products. It's the lowest price, should pay attention to choose to use.