Analysis of test results of aluminum substrate

The following conclusions were drawn through experiments:

  (1) The voltage withstand performance of the aluminum substrate prepreg, which causes the submersible sheet to fail the voltage performance, there are two reasons:

         1 The performance of the prepreg material itself does not reach the withstand voltage AC5000V, then we need to choose a good plate;

         2 The lead voltage degradation of the aluminum substrate prepreg is due to the damage of the prepreg during the production process. It is required to strictly follow the detailed control plan in the PCB production process, with emphasis on the protective measures of the prepreg.

  (2) Strictly control the pitch size of the conductor and the withstand voltage requirement of the pure aluminum substrate. There are two reasons for the product's resistance to voltage failure:

         1 The customer design error, the PCB factory engineering personnel did not focus on the inspection when checking the information, and did not timely communicate the design problems of the client;

         In the process of 2PCB$1J, the alignment accuracy of the line, the accuracy of the drilling alignment, and the precision of the milling plate are caused.

  (3) The aluminum substrate PCB in the production process (Clearance) on the basis of the theoretical value of the appropriate increase and strengthen the line alignment accuracy control, the aluminum substrate withstand voltage value can be qualified.

  (4) The voltage resistance performance of the finished aluminum substrate lamp is composed of the PCB withstand voltage performance and the lamp insulation protection scheme. Therefore, when the finished luminaire fails to test the withstand voltage, it is necessary to separately analyze the PCB withstand voltage performance and the luminaire insulation protection performance, so as to determine the true cause of the luminaire's pressure failure.