Multi-layer board, multi-layer with wires, there must be a suitable circuit connection between the two sides. The "bridge" between these circuits is called a via. Via is a small hole filled or coated with metal on PCB, which can connect wires of all layers. So that a plurality of parts can be connected. The working principle of a circuit board is the same as that of a conductor. . . Its principle is just like the wires we use when connecting circuits, both in series and in parallel, and its rough cleaning is different according to the different places of use. Generally speaking, the thicker part of the circuit board is generally the power supply area or the high-power component area, and the thinner part is the low-power area, which is the area connecting the low-power components.
Circuit board production video:/v _ show/v _ show/id _ xmjixmzq5nda4.html.
Production problem
Design check, the following list includes all aspects of the design cycle, and other items should be added for special applications. 1) Has the circuit been analyzed? Is the circuit divided into basic units to smooth the signal? 2) Does the circuit allow short circuit or isolated key wires? 3) Is the place that must be shielded effective? 4) Did you make full use of the basic grid graphics? 5) Is the printed board the best size? 6) Do you use the selected wire width and spacing as much as possible? 7) Is the preferred pad size and hole size adopted? 8) Are photographers and sketches appropriate? 9) Are jumpers used at least? Do jumpers pass through components and accessories? L0) Can you see the letters after assembly? Is it the right size and model? 1 1) Is there a large area of copper foil to prevent foaming? 12) Is there a tool positioning hole?
Give points. Thank you for your hard work. If you still don't want to, don't ask. I can't help it Hey hey.