According to the number of microelectronic devices integrated on a chip, integrated circuits can be divided into the following categories:
High Density Interconnection (HDI) PCB is a kind of (technology) for the production of printed circuit boards. It is a circuit board with relatively high circuit distribution density using micro blind via and buried via technology.
It is generally considered that if the frequency of the digital logic circuit reaches or exceeds 45MHZ~50MHZ, and the circuit working above this frequency has accounted for a certain amount of the entire electronic system (for example, 1/3), it is called a high-speed circuit.
High Frequency PCB processing attention points.
The development history of electronic components is actually a condensed history of electronic development. Electronic technology is a new technology developed at the end of the 19th century and the beginning of the 20th century. It has developed most rapidly and been widely used in the 20th century. It has become an important symbol of the development of modern science and technology.
If the substance is distinguished by conductivity, it can be roughly classified into two types
