Manufacturing method of intelligent power module and intelligent power module

Abstract

The invention is applicable to the technical field of electronic devices and provides an intelligent power module manufacturing method. The method comprises the following steps: selecting a metal substrate, arranging an insulating layer and a circuit wiring on the metal substrate, installing circuit elements and pins on the circuit wiring and enabling the run of the pins to gradually incline upward; placing the metal substrate in a packaging mold, fixing the pins on a horizontal plane through a first fixing device and making the surface of the metal substrate incline relative to the horizontal plane; configuring a metal pressing block parallel to the horizontal plane and pressing the metal pressing block on the metal substrate to make the metal pressing block parallel to the horizontal plane; and injecting packaging material in the mold to seal the substrate. The metal substrate is accurately positioned in the packaging mold through the metal pressing block, holes can be prevented from being reserved in the packaging structure, and the packaging compactness is improved. After packaging is completed, the position of the metal pressing block in the packaging structure can be directly measured by using a simple measuring tool so that the position of the metal substrate in the packaging mold can be known and subsequent inspection is facilitated.

Description

technical field [0001] The invention belongs to the technical field of electronic devices, and in particular relates to a manufacturing method of an intelligent power module and the intelligent power module. Background technique [0002] Intelligent Power Module (IPM) is a power drive product that combines power electronics and integrated circuit technology. IPM integrates power switching devices and high-voltage drive circuits, and has built-in fault detection circuits such as overvoltage, overcurrent and overheating. On the one hand, the IPM receives the control signal from the MCU to drive the subsequent circuits to work, and on the other hand, sends the system status detection signal back to the MCU. Compared with traditional discrete solutions, IPM has won an increasing market with its advantages of high integration and high reliability. It is especially suitable for frequency converters and various inverter power supplies for driving motors. An ideal power electronic...

AI Technical Summary

Problems solved by technology

[0005] However, when using this method for positioning, due to the existence of the hole 111, it will inevitably affect the compactness of the smart power module package. The corroded gap between the substrates 101 enters the original sealed part of the circuit substrate 101. Once the water vapor touches the circuit wiring 103 or the circuit components 104, it will damage the circuit wiring and circuit components. failure, resulting in damage to equipment using intelligent power modules

[0006] In addition, this method of observing the packaging position of the circuit substrate 101 through the hole 111 is difficult to observe and measure the height due to the small diameter of the hole 111 and the position of the hole is in the middle of the sealing resin, and generally requires the use of expensive instruments such as optical detection equipment to determine , which increases the manufacturing cost and processing difficulty of the intelligent power module

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