Question: Is the phrase "the copper skin layer corresponding to the solder layer is tinned or gold-plated only if there is copper" is correct? This sentence was said by a person working in a PCB board factory. DIP package only uses: topsolder and multilayer layer (after some decomposition, I found that the multilayer layer is actually the topsolder, bottomlayer, topsolder, bottomsolder layer overlap in size), and topsolder/bottomlayer is a circle larger than toplayer/bottomlayer. The paste mask layer is used for patch packaging! SMT package uses: toplayer layer, topsolder layer, toppaste layer, and toplayer and toppaste are the same size, topsolder is a circle larger than them. By default, the area without solder mask must be painted with green oil!ģ. The solder mask means to open a window on the whole piece of solder mask green oil, the purpose is to allow soldering!Ģ. It is not surprising that there is no green oil but the PCB we drew The wiring part on the board only has the toplayer or bottomlayer layer, and there is no solder layer, but the wiring part on the finished PCB board is coated with a layer of green oil.ġ. It does not mean that one is soldered and the other is green oil then whether there is a layer refers to the green oil layer, as long as there is this layer on a certain area, it means that the area is What about insulating green oil? For the time being, I haven't encountered such a layer! The Pcb Board we drew has a solder layer on the pads by default, so the pads on the PCB board are made of silver-white solder. It is used to open the stencil to leak tin.īoth layers are used for soldering.
The size is the same as the toplayer/bottomlayer layer. It corresponds to the pads of all patch components. The paste mask is used for machine patching. Solder mask refers to the part of the board that needs to be painted with green oil because it is a negative output, the actual effect of the part with solder mask is not painted with green oil, but tinned and silver-white!
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