What are the requirements of Foshan Medical FPC

Circuit board working principle: is to use the plate insulation material separated from the surface copper foil conductive layer, so that the current along the pre-designed route in the various components of the flow to complete such as work.  Amplification. Attenuation. Modulation.  Demodulation. Coding and other functions.  On a basic PCB, the parts are concentrated on one side and the wires on the other.  Because the wires only appear on one side, this is called a single panel.  A multilayer plate, with multiple layers of wires, requires a proper electrical connection between the two layers. This bridge between the circuits is called a guide hole (VIA).  The basic design process of circuit board can be divided into the following four steps: Medical FPC aluminum substrate base this process includes: open material - drilling - dry film light imaging - inspection board - etching - corrosion inspection - green oil - character - green inspection - tin spraying - aluminum substrate treatment - punching board - final inspection - packaging - shipping medical FPC  

 What is PCB board :PCB board generally refers to printed circuit board.  Printed circuit board {PCB circuit board}, also known as printed circuit board, is the supplier of electrical connections for electronic components.  Its development has been more than 100 years;  Its design is mainly layout design;  The main advantage of using circuit board is to greatly reduce wiring and assembly errors, improve the level of automation and production labor rate.  According to the number of PCB layers, it can be divided into single panel, double panel, four layer board, six layer board and other multi-layer PCB.  Because the printed circuit board is not a general terminal product, so the definition of the name is slightly confused, for example: the mother board used by personal computers, called the motherboard, and can not be directly called the circuit board, although there is a circuit board in the host board, but not the same, so the evaluation of the industry when the two related but can not say the same.  For example: because there are integrated circuit parts loaded on the circuit board, so the news media called him IC board, but in essence he is not equivalent to printing circuit board.  We usually say the printed circuit board refers to the bare board - that is, no board components of the circuit board.  1. Aluminum substrate plate is a very precious metal material, so in the production process, we must pay attention to the standardization of operation, to avoid the elimination of aluminum substrate material waste because of non-standard operation.  Aluminum substrate is a kind of metal base 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.  For high-end use, there are also double panels designed for circuit layer, insulation layer, aluminum base, insulation layer, circuit layer.  A few applications for multilayer board, can be made of ordinary multilayer board and insulation layer, aluminum paste.  Aluminum substrate and PCB board difference:  

Medical FPC5. Patch resistance and capacitance element is relatively easy to weld some, you can first point tin on a solder spot, and then put on the end of the component, with tweezers to clamp the component, after welding a head, and then see whether it is put right;  If it has been put, then welding on the other end of the classification of aluminum substrate: aluminum clad copper plate is divided into three categories: one is a universal aluminum clad copper plate, the insulation layer is composed of epoxy glass cloth bonding sheet;  The second is high heat dissipation aluminum base copper clad plate, the insulation layer is composed of high heat conduction epoxy resin or other resin;  The insulation layer is composed of polyolefin resin or polyimide resin glass cloth bonded sheet.  Aluminum base copper clad plate and conventional FR-4 copper clad plate is a big difference in heat dissipation, compared with 1.5mm thickness OF FR-4 copper clad plate and aluminum base copper clad plate, the former thermal resistance 20-22, the latter thermal resistance 1.0-2.0, the latter is much smaller.  In the layout, the size of the circuit board is too large, although the welding is easier to control, but the printing line is long, the impedance increases, the anti-noise ability decreases, the cost increases;  Too small, the heat dissipation decreases, welding is not easy to control, easy to appear adjacent lines interference with each other, such as the electromagnetic interference of the circuit board.  Therefore, PCB board design must be optimized:  

Medical FPC production process is complex, from cutting and drilling to packaging and shipping, there are more than 20 processes needed in the middle. In this long production process, according to customer demand, a variety of auxiliary medical FPC1 will be used.  The material must be AL1060, must meet ROHS certification standards and must be corrosion resistant.  2. The text and screen printing on the aluminum plate plate must be clear, and the board must be clean and pollution-free.  3. The size of the thermal conductivity must meet the user's product performance requirements.  4. Peeling strength (consistent with CCL IPC test method) 5. Screen printing of product name, specification, version, polarity mark and other words shall be carried out in accordance with the provisions without error, omission or reprinting.  The base material of FPC is usually double-sided or single-sided copper foil, which is the basis of the whole FPC, and the electrical performance of FPC is determined by it.  Other auxiliary materials are only used to assist installation and adapt to the use of the environment.