Slot type MOSFET and manufacturing method thereof
An oxide semiconductor and field effect transistor technology, which is applied in the field of trench metal oxide semiconductor field effect transistors and their manufacturing, can solve the problems of difficult processing and high cost, and achieves improved production efficiency, improved welding speed, and reduced usage quantity. Effect
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[0022] A detailed description will be given below with reference to specific embodiments. In the following embodiments, copper wires are used to replace traditional gold wires or aluminum wires, so as to achieve the purpose of reducing cost and processing difficulty.
[0023] One of the significant advantages of copper is that its electrical conductivity is better than that of gold and much higher than that of aluminum. Therefore, the amount of copper wire can be reduced to reduce the cost of raw materials. Since Trench MOSFET is a power tube, the current is very large in practical applications, and due to technical limitations, the maximum wire diameter used for ball bonding does not exceed 3 mil (1 mil is one thousandth of an inch, and gold wire can usually only be used 2 mil), so this The method actually requires as many as 12 or more 2mil gold wires to be soldered, so the cost is extremely high and the efficiency is very low. Based on the consideration of reducing cost and...
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