Common Problems of FPC Circuit Board

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Common Problems of FPC Circuit Board [Copy link]

1. Does the thickness of the copper foil of the aluminum substrate determine the service life of the lamp beads? Answer: The thickness of the copper foil will affect the thermal conductivity of the aluminum substrate and directly affect its service life. 2. Why do we need to drill many small holes on the PCB circuit board? Answer: Those are vias, which are 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 adjusted according to the size of the solder joint and the thickness of the solder wire. 4. What will happen if the aluminum substrate is not filmed? Answer: It will be scratched, and the solution will be easily oxidized, which is also related to the process technology. The production links are also different. 5. Is there a way to solder LED lamp beads on the aluminum substrate and use manual soldering? Answer: The most common method is to heat the aluminum substrate with a heating table. When the tin melts off, the unwanted lamp beads can be removed. 6. What does is mean on the circuit board? Answer: is should belong to the single-machine centrifugal switch mode on the circuit board. 7. What does R+.R-..L+.L- mean in the circuit board? Answer: 1. R is the abbreviation of right, which generally means the right channel. "+" is positive output (or input) and "-" is negative output (or input); 2. L is the abbreviation of left, which generally means the left channel. Similarly, "+" is positive output (or input) and "-" is negative output (or input). 8. What are the processes for circuit boards? Answer: According to the process, it can be divided into: high-precision circuit boards, impedance circuit boards, buried blind hole circuit boards, gold finger circuit boards, gold-plated circuit boards, tin-spraying circuit boards, thick copper circuit boards, rigid-flexible circuit boards, flexible circuit boards, single-sided circuit boards, double-sided circuit boards, and multi-layer circuit boards. 9. What circuit boards are used for the switch motherboard? Double-sided? Or multi-layer? Answer: They are all printed circuit boards. In order to save costs, they are generally four-layer boards, and six-layer boards are better, with added signal layers and auxiliary power supply layers. 10. Who knows the lamination process of multi-layer PCB circuit boards? Answer: Multi-layer printed circuit boards refer to printed circuit boards made of three or more conductive graphic layers and insulating materials alternately laminated and bonded together. The laminate is to use prepreg to connect the outer copper foil and the inner layer, as well as the inner layers, into a whole, forming a multilayer board. Using the characteristics of the prepreg, it melts at a certain temperature and becomes liquid to fill the graphic space to form an insulating layer, and then gradually solidifies after further heating to form a stable insulating material, while connecting each circuit and layer into a whole multilayer board.

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Common Problems with FPC Circuit Boards: Why does this title seem to be inconsistent with the following questions? ? It's just pure PCB