CN-122028752-A - Power module and power module

Abstract

The application discloses a power module and a power module, wherein each power unit comprises an upper bridge power unit, a lower bridge power unit and a printed circuit board, the printed circuit board comprises at least N prefabricated layers, N is more than or equal to 3, each prefabricated layer comprises an insulating layer and a conductive structure, adjacent prefabricated layers are isolated through the insulating layer and are sequentially connected through the conductive structure, the first prefabricated layer to the N prefabricated layer are sequentially arranged from top to bottom, N is a positive integer, a first end, a second end and a third end of the upper bridge power unit are positioned on the i prefabricated layer, and a first end, a second end and a third end of the lower bridge power unit are positioned on the j prefabricated layer. The power device is directly embedded in the printed circuit board, and the ultra-low noise and high power density are realized by utilizing high-density interconnection and advanced packaging technology, so that the system cost is saved, and the power conversion system can be widely applied to power conversion systems in the fields of new energy automobiles, industrial automation, renewable energy sources, consumer electronics and the like.

Inventors

• ZHANG LEI
• XU HAOYANG
• CHEN KAI
• Peng Hengyuan
• ZHANG ZE

Assignees

• 杭州士兰微电子股份有限公司

Dates

Publication Date

20260512

Application Date

20260122

Claims (20)

1. 1. A power module comprising power cells, each power cell comprising: An upper bridge power unit; a lower bridge power unit; The printed circuit board comprises at least N prefabricated layers, N is more than or equal to 3, each prefabricated layer comprises an insulating layer and a conductive structure, the adjacent prefabricated layers are isolated through the insulating layers and are sequentially connected through the conductive structures, the first prefabricated layer to the N prefabricated layer are sequentially arranged from top to bottom, and N is a positive integer; a power terminal comprising a direct current positive terminal, a direct current negative terminal, and an alternating current terminal; The third end of the upper bridge power unit is electrically connected with a direct current positive terminal, and the second end of the upper bridge power unit and the third end of the lower bridge power unit are electrically connected with an alternating current terminal; The first end, the second end and the third end of the upper bridge power unit are positioned on an ith prefabricated layer, the first end, the second end and the third end of the lower bridge power unit are positioned on a jth prefabricated layer, i is more than or equal to 2 and less than or equal to N-1, i is a positive integer, j is more than or equal to 2 and less than or equal to N-1, and j is a positive integer.
2. 2. The power module of claim 1, wherein the i = j, the upper bridge power cell is located between an i-th prefabricated layer and an i+1-th prefabricated layer, the first, second, and third ends of the upper bridge power cell are conductive regions in the i-th prefabricated layer, the lower bridge power cell is located between an i-th prefabricated layer and an i+1-th prefabricated layer, and the first, second, and third ends of the lower bridge power cell are conductive regions in the i-th prefabricated layer.
3. 3. The power module of claim 2, wherein the first through i-th preformed layers each comprise a first conductive region, a second conductive region, a third conductive region, and a fourth conductive region; The first conductive areas and the fourth conductive areas of the first to the i-1 th prefabricated layers are electrically connected with each other, or the first conductive areas and the fourth conductive areas of the first to the i-1 th prefabricated layers are in an integrated structure.
4. 4. A power module according to claim 3, wherein the third end of the upper bridge power cell is electrically connected to the third conductive region of the i-th pre-fabricated layer or the third end of the upper bridge power cell serves as the third conductive region of the i-th pre-fabricated layer.
5. 5. A power module according to claim 3, wherein the third end of the lower bridge power cell is electrically connected to the fourth conductive region of the i-th pre-fabricated layer or the third end of the lower bridge power cell serves as the fourth conductive region of the i-th pre-fabricated layer.
6. 6. A power module according to claim 3, wherein the second end of the upper bridge power cell is electrically connected to the first conductive region of the i-th pre-fabricated layer or the second end of the upper bridge power cell serves as the first conductive region of the i-th pre-fabricated layer.
7. 7. A power module according to claim 3, wherein the second end of the lower bridge power cell is electrically connected to the second conductive region of the i-th pre-fabricated layer or the second end of the lower bridge power cell serves as the second conductive region of the i-th pre-fabricated layer.
8. 8. The power module of claim 2, wherein when the upper bridge power unit is commutated, current sequentially flows from the direct current positive terminal through the third conductive region of the first to i-layer prefabricated layers, through the third end of the upper bridge power unit, through the second end of the upper bridge power unit, through the conductive structure, and sequentially flows through the first conductive region of the i-th to first prefabricated layers, and through the alternating current terminal; When the lower bridge power unit is used for converting current, the current sequentially flows through the fourth conductive areas of the first prefabricated layer to the i prefabricated layer, the third end of the lower bridge power unit, the second end of the lower bridge power unit, the conductive structure, the second conductive areas of the i prefabricated layer to the first prefabricated layer and the direct current negative terminal from the alternating current terminal.
9. 9. The power module of claim 8, wherein when the upper bridge power unit is commutated, current flows from the direct current positive terminal through the third conductive region of the first prefabricated layer, the third conductive region of the second prefabricated layer, the third conductive region of the third prefabricated layer, the third end of the upper bridge power unit, the second end of the upper bridge power unit, the conductive structure, and then sequentially through the first conductive region of the third prefabricated layer, the first conductive region of the second prefabricated layer, the first conductive region of the first prefabricated layer, and the alternating current terminal; When the lower bridge power unit is used for converting current, the current sequentially flows through the fourth conductive area of the first prefabricated layer, the fourth conductive area of the second prefabricated layer, the fourth conductive area of the third prefabricated layer, the third end of the lower bridge power unit, the second end of the lower bridge power unit, the conductive structure, the second conductive area of the third prefabricated layer, the second conductive area of the second prefabricated layer, the second conductive area of the first prefabricated layer and the direct current negative terminal from the alternating current terminal through the conductive structure.
10. 10. The power module of claim 8, wherein when the upper bridge power unit is commutated, current sequentially flows from the direct current positive terminal through the third conductive region of the first prefabricated layer, the third conductive region of the second prefabricated layer, the third end of the upper bridge power unit, the second end of the upper bridge power unit, the conductive structure, the first conductive region of the second prefabricated layer, the first conductive region of the first prefabricated layer, and the alternating current terminal; When the lower bridge power unit is used for converting current, the current sequentially flows through the fourth conductive area of the first prefabricated layer, the fourth conductive area of the second prefabricated layer, the third end of the lower bridge power unit, the second end of the lower bridge power unit, the conductive structure, the second conductive area of the second prefabricated layer, the second conductive area of the first prefabricated layer and the direct current negative terminal from the alternating current terminal through the conductive structure.
11. 11. The power module of claim 2, wherein when the upper bridge power unit is used for converting current, the current sequentially flows from the direct current positive terminal through the corresponding conductive areas in the first to the i-th prefabricated layers, through the third ends of the upper bridge power units, through the second ends of the upper bridge power units, through the conductive structures, and sequentially flows through the corresponding conductive areas in the i-th to the first prefabricated layers and through the alternating current terminals; When the lower bridge power unit is used for converting current, the current sequentially flows through the conductive areas corresponding to the first to the i-th prefabricated layers from the alternating current terminal, the third end of the lower bridge power unit, the second end of the lower bridge power unit, the conductive structure, the conductive areas corresponding to the i-th prefabricated layers and the direct current negative terminal.
12. 12. The power module of claim 2 wherein each of the N-layer preformed layers includes a first conductive region and a fourth conductive region, each of the first through i-th preformed layers further including a second conductive region and a third conductive region; The first conductive area and the fourth conductive area of each layer in the N-layer prefabricated layers are connected with each other, and the first conductive area and the fourth conductive area of each layer in the N-layer prefabricated layers are of an integrated structure.
13. 13. The power module of claim 12, wherein the third end of the upper bridge power cell is electrically connected to the third conductive region of the i-th pre-fabricated layer or the third end of the upper bridge power cell is used as the third conductive region of the i-th pre-fabricated layer.
14. 14. The power module of claim 12, wherein the third end of the lower bridge power cell is electrically connected to the fourth conductive region of the i-th pre-fabricated layer or the third end of the lower bridge power cell is used as the fourth conductive region of the i-th pre-fabricated layer.
15. 15. The power module of claim 12, wherein the second end of the upper bridge power cell is electrically connected to the first conductive region of the i-th pre-fabricated layer or the second end of the upper bridge power cell is used as the first conductive region of the i-th pre-fabricated layer.
16. 16. The power module of claim 12, wherein the second end of the lower bridge power cell is electrically connected to the second conductive region of the i-th pre-fabricated layer or the second end of the lower bridge power cell serves as the second conductive region of the i-th pre-fabricated layer.
17. 17. The power module of claim 12, wherein when the upper bridge power unit is commutated, current sequentially flows from the direct current positive terminal through the third conductive areas of the first to i-th prefabricated layers, through the third end of the upper bridge power unit, through the second end of the upper bridge power unit, through the conductive structure, and then sequentially through the first conductive areas of the i-th to first prefabricated layers, and through the alternating current terminal; When the lower bridge power unit is used for converting current, the current sequentially flows through the fourth conductive areas of the first prefabricated layer, the second conductive areas of the second prefabricated layer and the third prefabricated layer from the alternating current terminal, the conductive structures and the direct current negative terminal.
18. 18. The power module of claim 12, wherein when the upper bridge power unit is commutated, current flows from the direct current positive terminal through the third conductive region of the first prefabricated layer, the third conductive region of the second prefabricated layer, the third conductive region of the third prefabricated layer, the third end of the upper bridge power unit, the second end of the upper bridge power unit, the conductive structure, the first conductive region of the third prefabricated layer, the first conductive region of the second prefabricated layer, the first conductive region of the first prefabricated layer, and the alternating current terminal in sequence; When the lower bridge power unit is used for converting current, the current sequentially flows through the fourth conductive area of the first layer prefabricated layer, the fourth conductive area of the second layer prefabricated layer, the fourth conductive area of the third layer prefabricated layer, the fourth conductive area of the fourth layer prefabricated layer, the fourth conductive area of the fifth layer prefabricated layer, the conductive structure, the fourth conductive area flowing back to the third layer prefabricated layer, the third end flowing through the lower bridge power unit, the second end of the lower bridge power unit, the conductive structure, the second conductive area of the third layer prefabricated layer, the second conductive area of the second layer prefabricated layer, the second conductive area of the first layer prefabricated layer and the direct current negative terminal from the alternating current terminal.
19. 19. The power module of claim 12, wherein when the upper bridge power unit is commutated, current flows from the direct current positive terminal through the third conductive region of the first prefabricated layer, the third conductive region of the second prefabricated layer, the third end of the upper bridge power unit, the second end of the upper bridge power unit, the conductive structure, the first conductive region of the second prefabricated layer, the first conductive region of the first prefabricated layer, and the alternating current terminal in sequence; When the lower bridge power unit is used for converting current, the current sequentially flows through the fourth conductive area of the first layer of prefabricated layer, the fourth conductive area of the second layer of prefabricated layer, the fourth conductive area of the third layer of prefabricated layer, the conductive structure, the fourth conductive area of the fourth layer of prefabricated layer, the fourth conductive area flowing back to the second layer of prefabricated layer, the third end flowing through the lower bridge power unit, the second end of the lower bridge power unit, the conductive structure, the second conductive area of the second layer of prefabricated layer, the second conductive area of the first layer of prefabricated layer and the direct current negative terminal from the alternating current terminal through the conductive structure.
20. 20. The power module of claim 12, wherein N is equal to 4, When the upper bridge power unit is used for converting current, the current sequentially flows through the third conductive area of the first layer of prefabricated layer, the third conductive area of the second layer of prefabricated layer, the third conductive area of the third layer of prefabricated layer, the third end of the upper bridge power unit, the second end of the upper bridge power unit, the conductive structure, the first conductive area of the third layer of prefabricated layer, the first conductive area of the second layer of prefabricated layer, the first conductive area of the first layer of prefabricated layer and the alternating current terminal from the direct current positive terminal; When the lower bridge power unit is used for converting current, the current sequentially flows through the fourth conductive area of the first layer of prefabricated layer, the fourth conductive area of the second layer of prefabricated layer, the fourth conductive area of the third layer of prefabricated layer, the conductive structure and the fourth conductive area of the fourth layer of prefabricated layer from the alternating current terminal, flows through the third end of the lower bridge power unit, flows through the second end of the lower bridge power unit, flows through the conductive structure, and then sequentially flows through the second conductive area of the third layer of prefabricated layer, the second conductive area of the second layer of prefabricated layer, the second conductive area of the first layer of prefabricated layer and the direct current negative terminal.

Description

Power module and power module Technical Field The present invention relates to the field of semiconductor integrated circuit manufacturing, and in particular, to a power module and a power module. Background In the field of power electronics, conventional power modules (e.g., IGBT, MOSFET modules) are typically soldered to the surface of a printed circuit board using discrete devices or electrically connected by wire bonding. The structure has the problems of large parasitic parameters, high thermal resistance, limited power density and the like, and can not meet the requirements of high-frequency and high-density application. Meanwhile, the requirements of modern electronic systems on miniaturization, light weight and high reliability are continuously improved, and the limitations of the prior art are further highlighted. Disclosure of Invention In view of the above problems, an object of the present invention is to provide a power module and a power module with high power density and low noise. The invention provides a power module, which comprises power units, wherein each power unit comprises: An upper bridge power unit; a lower bridge power unit; The printed circuit board comprises at least N prefabricated layers, N is more than or equal to 3, each prefabricated layer comprises an insulating layer and a conductive structure, adjacent prefabricated layers are isolated through the insulating layer and are sequentially connected through the conductive structure, the first prefabricated layer to the N prefabricated layer are sequentially arranged from top to bottom, and N is a positive integer; a power terminal including a direct current positive terminal, a direct current negative terminal, and an alternating current terminal; The third end of the upper bridge power unit is electrically connected with a direct current positive terminal, and the second end of the upper bridge power unit and the third end of the lower bridge power unit are electrically connected with an alternating current terminal; The first end, the second end and the third end of the upper bridge power unit are positioned on the ith prefabricated layer, the first end, the second end and the third end of the lower bridge power unit are positioned on the jth prefabricated layer, i is more than or equal to 2 and less than or equal to N-1, i is a positive integer, j is more than or equal to 2 and less than or equal to N-1, and j is a positive integer. Preferably, i=j, the upper bridge power unit is located between the i-th prefabricated layer and the i+1-th prefabricated layer, the first end, the second end and the third end of the upper bridge power unit are conductive areas in the i-th prefabricated layer, the lower bridge power unit is located between the i-th prefabricated layer and the i+1-th prefabricated layer, and the first end, the second end and the third end of the lower bridge power unit are conductive areas in the i-th prefabricated layer. Preferably, each of the first to i-th prefabricated layers includes a first conductive region, a second conductive region, a third conductive region, and a fourth conductive region; The first conductive areas and the fourth conductive areas of the first to the i-1 th prefabricated layers are electrically connected with each other, or the first conductive areas and the fourth conductive areas of the first to the i-1 th prefabricated layers are in an integrated structure. Preferably, the third end of the upper bridge power unit is electrically connected to the third conductive region of the i-th layer pre-fabricated layer, or the third end of the upper bridge power unit serves as the third conductive region of the i-th layer pre-fabricated layer. Preferably, the third end of the lower bridge power unit is electrically connected to the fourth conductive region of the i-th layer pre-fabricated layer, or the third end of the lower bridge power unit serves as the fourth conductive region of the i-th layer pre-fabricated layer. Preferably, the second end of the upper bridge power cell is electrically connected to the first conductive region of the i-th pre-fabricated layer, or the second end of the upper bridge power cell serves as the first conductive region of the i-th pre-fabricated layer. Preferably, the second end of the lower bridge power cell is electrically connected to the second conductive region of the i-th pre-fabricated layer, or the second end of the lower bridge power cell serves as the second conductive region of the i-th pre-fabricated layer. Preferably, when the upper bridge power unit is used for converting current, the current sequentially flows through the third conductive areas of the first prefabricated layers to the i layer, the third end of the upper bridge power unit, the second end of the upper bridge power unit, the conductive structure, the first conductive areas of the ith prefabricated layer to the first prefabricated layers and the alternating current terminal from the