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Multilayer PCB press temperature and pressure uniformity test method
The indispensable thing in the process of multilayer PCB processing is the use of a pressing machine. The pressure uniformity and temperature uniformity of the pressing machine have a considerable influence on the quality of the pressing, and how to conduct regular inspections through experiments Its stability ensures the pressing quality of the product. There are related discussions on this issue in the forum, and the results of the discussions are summarized as follows:
1. Test method of uniformity of pressure:
For the pressure uniformity test, there is a special induction paper, which is equivalent to Lao Gao's copy paper, and the effect is better, but the price is very expensive. In addition, standard lead bars can be arranged in the press for testing. After the end, measuring the residual thickness of each section of each lead bar can also know the uniformity of the press, and the value can be quantified.
In addition, the more old-fashioned method is to use carbon paper on a piece of white paper to perform the pressing operation, and then check the marks left on the white paper after pressing, and you can know which position of the press platform is insufficiently pressed. Where the pressure is even.
2. Test method of temperature uniformity:
Use a thermocouple thermometer to make a few more thermocouple wires, and then place them at nine or more points according to the position of the platform. After pressure, record the temperature data of each position, and then make statistics and make the form of graphs. The temperature uniformity of the entire pressing platform can be seen intuitively and conveniently. At the same time, through multiple tests, the temperature reproducibility changes can be obtained, so as to systematically evaluate the performance of the pressing machine.
The above is the introduction to the temperature and pressure uniformity test method of the multilayer PCB press. Ipcb is also provided to PCB manufacturers and PCB manufacturing technology.
