Maintenance of Blind Buried-hole Circuit Board
blind buried hole circuit board is also called HDI board, usually used in mobile phones, GPS navigation and other high-end products. The structure of the conventional multi-layer circuit board includes the inner layer circuit and the outer layer circuit, and then the process of drilling and in-hole metallization is used to realize the connection function between the inner layers of the circuit. With the development of electronic products to high density and high precision, the same requirements are put forward for circuit boards. If it is difficult to copy the board of
blind buried hole circuit board, usually encounters blind buried hole when copying the board of mobile phone board and HDI board. please pay attention to the following points at this time:
1. please be careful and be prepared before copying the board.
2. The equipment must be advanced.
3. In the process of copying the board, compare with the original board.
4. Pay attention to the inspection and repeat the inspection.
In order to ensure working conditions and reduce the failure rate of the circuit board, we need to maintain the blind hole circuit board . The maintenance method can be divided into semi-maintenance and annual maintenance.
1. Semi-maintenance
( 1 ) Regularly clean the dust on the blind hole circuit board every quarter. You can use the special cleaning fluid to clean the circuit board. After cleaning the dust on the blind hole circuit board, use a hair dryer to dry it.
( 2 ) Observe whether the electronic components on the blind buried hole circuit board have high temperature traces and whether the electrolytic capacitor has bulged and leaked. If problems are found during the inspection, they should be replaced in time.
2. Annual Maintenance
( 1 ) Develop the habit of regularly sampling the capacity of electrolytic capacitors in Blind Buried Hole Circuit Board . If the capacity of electrolytic capacitors is found to be less than 20% of the nominal capacity during sampling, they should be replaced in time. Under normal circumstances, it is recommended to replace electrolytic capacitors for about ten years.
( 2 ) For high-power devices coated with heat dissipation silicone grease, in order to prevent the high-power devices in the circuit board from being burned out due to poor heat dissipation, it should be regularly checked whether the heat dissipation silicone grease is completely dry, and the dry high-power devices should be coated with new heat dissipation silicone grease again.
( 3 ) The dust passing through the circuit board should be cleaned in time to prevent dust from accumulating on the surface of the circuit board and affecting the normal operation of the components.
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