layers compared to the two-layer board, and often part of the internal layers are used as a ground plane or power plane, to achieve better signal integrity, higher signaling frequencies, and better power supply decoupling. In multilayer boards, layers of material are laminated together in an imprimat aurit circuit alternating sandwich: copper, substrate, copper, substrate, copper,
and required modernization, and the printed circuit through its continuous improvement was one of the first aids that allowed this modernization. The smaller and smaller dimensions and the flexibility of the imprimat circuit aurit printed circuit board made in recent years have greatly helped fields such as medicine and aeronautics to benefit
is generally green in color but can have different colors: green, red, blue, white, black. Only the outer layers need to be covered with solder mask, the inner aurit imprimat circuit copper layers are protected by the adjacent substrate layers. The soldering mask soldermask is made of a fluid substance like an ink and is applied in