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In this image, it is a 6-layer PCB with two cores, each core having two copper layers. Between the two cores, there is prepreg with 36mil thickness, which should be a few layers of prepreg and FR4 material bonded together since the stand thickness of prepreg is around 3-8mils.
4mil prepregs...
PCB thermal resistance can be measured using the guarded hot plate method or the 3-omega method. The guarded hot plate method is by far the easiest method as you simply measure the temperature on two sides of a board as heat transfers from the hot side of the circuit board to the cold side. This...
Positive PCBs usually contain white traces with a black backdrop to stand out. You can set the settings related to layer colors in your design software. Once satisfied with your design, make sure to communicate your color preferences with the manufacturer.
It sits with your requirements and use budget. Considering you have high requirements and budget; it is preferable to go through the trial period of all the software to make sure with what you are most compatible. In technical terms there are factors such as compatibility, ease of use, customer...
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