The material of flexible circuit board FPC of huizhou foot sensor

Now the high thermal conductivity is usually ceramic, copper, etc., but because considering the cost of doubt, most of the aluminum substrate on the market now, the corresponding thermal conductivity of aluminum substrate is the parameter we care about, the higher the thermal conductivity is one of the symbols of the better function. Aluminum substrate is a common metal base copper-clad aluminum substrate, which has good thermal conductivity, electrical insulation and machining function. The thermal conductivity of aluminum substrate usually has 1.0, 1.5, 2.0, the specific situation depends on the need for goods.

FPC aluminum substrate is a kind of metal copper-clad plate with good heat dissipation function. Generally, a single panel is composed of three layers, which are respectively circuit layer (copper foil), insulation layer and metal base. Common in LED lighting products foot sensor flexible circuit board FPC. There are positive and negative sides, the white side is welded LED pin, the other side is aluminum color, generally daub heat conduction paste and heat conduction part contact. There are ceramic substrates and so on. Advantages of aluminum substrate :1. More suitable for SMT process; 2. 3. The heat dissipation has been effectively dealt with, thus reducing the operating temperature of the module, prolonging the service life and improving the reliability. The development trend of PCB manufacturing technology at home and abroad is basically the same, that is, to high density, high precision, fine aperture, fine wire, fine spacing FPC, PCB board is generally copper substrate, It is also divided into single-sided flexible CIRCUIT board FPC board and double-sided flexible circuit board FPC board, the material used between the two is very obvious difference, the main material of aluminum substrate is aluminum plate, and the main material of PCB board is copper. Aluminum substrate because of its SPECIAL PP material. Heat dissipation is better. The price is also more expensive. Both the comparison in terms of heat dissipation, aluminum plate in the cooling performance is more superior and PCB, its thermal performance is also different aluminum plate is a kind of PCB, aluminum plate price is more expensive, high reliability, multiple stratification, high-speed transmission, light weight, thin, on the production at the same time to improve productivity, reduce costs, reduce pollution, Adapt to many varieties, small batch production direction development. The technical development level of printed circuit is generally represented by the line width, aperture, and thickness/aperture ratio on the printed board.

To begin welding all pins, add solder to the tip of the soldering iron and apply flux to all pins to keep them wet. Touch the end of each pin of the chip with the tip of the soldering iron until you see the solder flowing into the pin. 5. Fill: Copper for ground wire network, can reduce impedance. 6. Electrical boundary: used to determine the size of the circuit board. All components on the circuit board must not exceed this boundary. Circuit board names are: circuit board, PCB board, aluminum substrate, hf board, thick copper board, impedance board, PCB, ultra-thin circuit board, ultra-thin circuit board, printing (copper etching technology) circuit board and so on. The circuit board makes the circuit miniaturized and intuitive, which plays an important role in the batch production of fixed circuit and the optimization of electric appliance layout. Circuit boards may be called printed circuit boards or printed circuit boards, English name is (PrintedCircuitBoard) PCB, FPC PCB (FlexiblePrintedCircuitboard) [1] (FPC circuit board, also known as flexible PCB flexible circuit board is made of polyimide or polyester film as the backing material with a high reliability, Flexible printed circuit board. During welding, the tip of the soldering iron should be kept parallel with the soldering pin to prevent the FPC of the foot sensor from being overlapped due to excessive soldering tin. 4. After soldering all the pins, wet them with flux to clean the solder. Suck off excess solder where needed to eliminate any short circuits and lap joints. Finally, use tweezers to check for soldering. When finished, remove flux from the circuit board, dip a bristles brush in alcohol and wipe it carefully in the direction of the pins until flux disappears.