FAQ of FPC circuit board

1. Does the copper foil thickness of aluminum substrate determine the service life of lamp beads? Answer: The thickness of copper foil will affect the thermal conductivity of aluminum substrate and directly affect its service life.



2. Why do many small holes need to be drilled on the FPC circuit board? Answer: That is a through hole, which is used to connect the electrical signal of one layer to another layer.



3. What is the temperature of the soldering iron when soldering the circuit board? Answer: Generally, it is about 200~300 degrees. The specific adjustment is based on the size of the welding spot and the thickness of the welding wire.



4. What happens if the aluminum substrate is not coated? Answer: It is also related to the manufacturing process that the liquid medicine is easy to oxidize after wiping the flowers. The production process is also different.



5. Is there any way to weld LED lamp beads on aluminum substrate by hand? Answer: The most common method is to use a heating table to heat the aluminum substrate. When the tin is melted off, you can remove the unwanted lamp beads.

6. What does is mean on the circuit board? Answer: IS should be in the single-machine centrifugal switch mode on the circuit board.



7. R+. R -. in the circuit board. What does L+. L mean? Answer: 1. R is the abbreviation of right, which generally means right channel. "+" means positive output (or input), and "-" means negative output (or input); 2. L is the abbreviation of left, which generally means left channel. Similarly, "+" means positive output (or input), and "-" means negative output (or input). 8. What processes do circuit boards have? Answer: From the perspective of technology, it can be divided into: high-precision circuit board, impedance circuit board, buried blind hole circuit board, gold finger circuit board, gold-plated circuit board, tin-sprayed circuit board, thick copper circuit board, rigid-flexible combination circuit board, flexible circuit board, single-sided circuit board, double-sided circuit board, multi-layer circuit board



9. What circuit board is used for the switch motherboard? two-sided? or multiple layers? Answer: They are all printed circuit boards. In order to save costs, it is generally better to use four-layer boards and six-layer boards. The middle signal layer and auxiliary power layer are added.



10. Who knows the lamination process of multi-layer FPC circuit board? A: Multilayer printed circuit board refers to a printed circuit board made of three or more conductive graphic layers and insulating materials alternately laminated and bonded together. The pressing plate is to connect the outer copper foil and the inner layer, as well as the inner layer and the inner layer, into a whole with a semi-curing sheet, and become a multilayer board. Using the characteristics of the semi-solidified sheet, it will melt at a certain temperature and become a liquid to fill the graphic space to form an insulating layer. Then it will be further heated and gradually solidified to form a stable insulating material. At the same time, the layers of each line will be connected into an integral multilayer board.