Single-tube power chip with self-protection function and connection structure thereof

By connecting a single-transistor power chip with a SiC MOSFET or IGBT structure to a copper strip and a nano-silver sintered layer, and combining software and hardware protection mechanisms, the reliability and safety issues of traditional power module chips in short-circuit protection are solved, achieving rapid circuit breaking and efficient heat dissipation, thus improving the safety and integration of the power module.

CN122294944APending Publication Date: 2026-06-26SHENZHEN HANHAI GALAXY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610283111.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-10
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Traditional power module chips suffer from problems such as insufficient bonding wire reliability, slow short-circuit protection speed, potential for secondary disasters, and limited heat dissipation performance in terms of short-circuit protection. Existing technologies cannot effectively solve the safety and reliability issues under short-circuit conditions.

Method used

The single-transistor power chip adopts SiC MOSFET or IGBT structure, combined with the connection structure of copper strip and nano-silver sintered layer. The copper strip is equipped with a fusible narrow aperture. Through the dual protection mechanism of software and hardware, the circuit is quickly disconnected in the event of a short circuit, and efficient heat dissipation is achieved through nano-silver sintered layer and ceramic copper-clad plate.

Benefits of technology

It achieves absolute safety protection under short-circuit conditions, avoids failures such as continuous arcing, explosion and fire, improves connection reliability and heat dissipation performance, simplifies structural design, and improves the integration level of power modules.

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Abstract

The invention discloses a single-tube power chip with a self-protection function and a connection structure thereof, belongs to the technical field of power electronics, and aims to solve the problem of failure risk of explosion and fire of a power module under a short-circuit condition, the single-tube power chip comprises a chip body, electrodes and a copper strip, the electrodes are arranged above the chip body, the copper strip is provided with a fusing narrow diameter, and the fusing narrow diameter is connected with the chip body. The copper strip is fused to cut off a circuit when the short-circuit current is overheated, and the copper strip is fixedly connected with the electrode through a conductive connecting layer; through a dual protection mechanism of software protection and hardware protection, the software protection quickly responds within 0.1 ms in the early stage of short circuit, and the hardware protection forcibly disconnects a loop within 10ms through a copper strip fusing narrow diameter, so that even if the software protection fails, the hardware protection can still ensure the system safety, absolute safety protection of short circuit breaking under 1000V high voltage is realized, and the safety of the system is ensured. Failure phenomena such as continuous arc discharge and explosion fire are thoroughly avoided, a copper strip is adopted to replace a traditional binding wire, and the thermal resistance of the connection structure is greatly reduced in combination with a nano-silver sintering process.
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