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1. Does the thickness of copper foil 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 are many holes drilled on PCB?
Answer: that is a via, which is used to connect the electrical signal of one layer to another.
3. What is the temperature of the soldering iron when soldering the circuit board?
Answer: it is generally 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: I can wipe flowers, and the potion is easy to oxidize, which is also related to the manufacturing process. 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 heat the aluminum substrate with a heating table. When the tin melts, you can take off the unwanted lamp beads.
6. What does is mean on a circuit board?
Answer:is on the circuit board, it should belong to single machine centrifugal switch mode.
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), "-" means negative output (or input); 2. L is the abbreviation of left, which generally means left channel. Similarly, "+" means positive output (or input), "-" means negative output (or input).
8. What are the processes of Printed Circuit Boards?
Answer: in terms 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 spraying circuit board, thick copper circuit board, rigid flexible circuit board, flexible circuit board, single-sided circuit board, double-sided circuit board and multi-layer circuit board
9. What circuit board does the switch motherboard use? two-sided? Or multiple layers?
Answer:they are all printed circuit boards. In order to save costs, they are generally four layer boards, six layer boards are better, and the medium signal layer and auxiliary power layer are added.
10. Who knows the lamination process of Multilayer PCB board?
Answer: 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 laminate is a multi-layer board that connects the outer copper foil and the inner layer, as well as the inner layer and the inner layer into a whole with a semi cured sheet. Using the characteristics of the semi cured sheet, it melts at a certain temperature to become a liquid, fills the graphic space to form an insulating layer, and then further heats and solidifies gradually to form a stable insulating material. At the same time, each layer of each line is connected into an integral multilayer board.
