Temperature effect of vacuum eutectic furnace

The thermal damage of vacuum eutectic furnace welding will affect the performance of thin film devices; Too high temperature will cause adhesion, wear and adhesion; Ineffective thermal components can affect heat conduction. The following is a brief introduction to the temperature effect of vacuum eutectic furnace.

1、 The common problem of eutectic in vacuum eutectic furnace is that the temperature of heater block is less than the eutectic temperature In this case, the solder can be melted, but the gold plating layer on the back of the chip can be diffused at a sufficient temperature. In practice, it is mistakenly thought that the solder melting can achieve the purpose of eutectic., Because heating the base for a long time will damage the circuit, it can be seen that the control of temperature and time during eutectic is very important. For the above reasons, the setting of temperature curve is an important factor for the quality of eutectic.

2、 Due to the high temperature required during eutectic, especially the eutectic with Auge solder, the vacuum eutectic furnace puts forward requirements for the high temperature resistance of substrate and thin film circuit. It is required that the circuit can withstand a high temperature of 400 ℃, under which the resistance and conductivity cannot be changed. Therefore, a key factor of eutectic is temperature. It does not simply reach a fixed temperature, but goes through a process of temperature curve change. In the process of temperature change, it also has the ability to deal with any random events, such as vacuum pumping, inflation, exhaust and so on. These are the functions of eutectic furnace equipment.

3、 The temperature control of multichip eutectic in vacuum eutectic furnace is different from that of single chip. At this time, the board room of stepped eutectic should be used. Generally, the solder with high temperature is eutectic first, and then the solder with low temperature is eutectic. The eutectic furnace control system can set multiple temperature curves, and each temperature curve can be set to 9 sections, which can be extended to 81 sections by linking. During the operation of the temperature curve, process steps such as inflation, vacuum pumping and exhaust can be added.