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At present, most of the holes drilled in the double-sided flexible printed board are still drilled by the NC drilling machine. The NC drilling machine is basically the same as that used in the rigid printed board, but the drilling conditions are different. Because the flexible printed board is very thin, multiple pieces can be overlapped for drilling. If the drilling conditions are good, 10 ~ 15 pieces can be overlapped for drilling.

IC chip (integrated circuit) is an integrated circuit formed by putting a large number of microelectronic components (transistors, resistors, capacitors, diodes, etc.) on a plastic base to make a chip. At present, almost all chips can be called IC chips.

The term "plug hole" is not a new term for the printed circuit board industry.

As an important electronic component carrier, double-sided boards have been widely used in modern electronic devices due to their unique double-layer wiring structure.

Nowadays, high frequency electronics are of great concern, especially in remote systems. With the rapid development of satellite communication, data items are developing towards fast and high frequency.

Rigid-flex board is a combination of flexible board and hard board. It is a circuit board formed by combining a thin layered flexible bottom layer with a rigid bottom layer, and then laminating it into a single component.The flexible board is used to replace the cable assembly to complete the highly reliable connection and transmission of power and electrical signals.The product can work stably and reliably for a long time under harsh environments such as high and low temperature, high humidity, vibration, salt spray, and low air pressure. At present, Jonhon Optronic has provided rigid and flexible printed board solutions for aviation, aerospace, ships, weapons and other fields.