PCB News - What are the measures to prevent the circuit from copying the board?

With the advancement of science and technology, copy board technology is also moving forward. Today's copy board technology, if the design does not prevent copy board processing, even if the PCP board with more than 20 layers, the professional copy board team can draw the detailed principle picture. Precautions can be taken to appropriately increase the difficulty of copying the board, so that the copying team's investment in copying is not proportional to the value, and it is not worth it to give up.

Preventing copying is not only a technical problem, it is also a game with copying personnel. Product design cannot pursue technology that cannot be copied regardless of cost. The more prevention, the more difficult the design, and the higher the cost of the product. The degree of prevention must be measured with the investment and value of the product.
What are the measures to prevent the circuit from copying the board?
What are the general measures to prevent copying?
1. Sealing and spraying the printed circuit board, this method can increase the difficulty of copying the board easily and appropriately.
2. Chip polishing, the most important thing to copy board is to understand the chip. If you are familiar with all the chips on the printed board, copy board is relatively easy. On the premise of not affecting the function of the chip, polish all the chip models. Unable to find the model of the chip, it is much more difficult for the copying personnel.
What are the measures to prevent the circuit from copying the board?
3. Appropriately use some relatively unpopular and uncommon chips. If it is a very common chip, even if it is impossible to check the chip model, it is easy to infer the chip model based on the packaging and use experience.
4. PCB design adopts buried via and blind via technology, and the over-control is hidden in the board. It is difficult for the copying personnel to infer the actual routing based on the multi-layer circuit. However, the research and development cost of buried via and blind via technology is relatively high. Used in high-end products.
What are the measures to prevent the circuit from copying the board?
5. The processor selects a chip with good encryption performance, difficult decryption, and high security performance.
6. Add a self-destruct function chip to the hardware design, and add an anti-piracy function program to the software.