JPH0511479U - Multilayer metal core printed circuit board - Google Patents

Abstract

(57) [Summary] [Purpose] In a multilayer metal core printed circuit board or a metal core printed circuit board on which heat-generating electronic components are mounted, the heat generated from the heat-generating electronic components is efficiently conducted to the cooling block. [Structure] A plurality of through holes 19 are provided in a multilayer metal core printed circuit board 1 in which an insulating layer 3a, a metal core 2a, an insulating layer 3b, a metal core 2b, and an insulating layer 3c are laminated in this order. The conductivity agent 20 is filled to generate the heat-generating electronic component 5
The heat generated from is conducted to the cooling block 10 through the metal core 2b, the high thermal conductivity agent 20 and the metal core 2a. Further, the end portion of the metal core 21 is formed in a tapered shape 21a, the cooling block 22 is provided with a tapered portion 22a matching the tapered end portion 21a of the metal core 21, and the tapered end portion 21a of the metal core 21 is formed. By contacting and fixing the taper portion 22a of the cooling block 22 to each other, the heat generated from the heat-generating electronic component 4 is efficiently conducted to the cooling block 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a multilayer metal core printed circuit board and a metal core board on which heat-generating electronic components are mounted. It concerns a lint substrate.

[0002]

[Prior art]

  FIG. 4 is a perspective view showing a conventional multilayer metal core printed circuit board, and FIG. 5 is shown in FIG. FIG. 3 is a cross-sectional view of a main part when the multilayer metal core printed circuit board is mounted on a shelf. In the figure, reference numeral 1 denotes metal cores 2a, 2b and insulating layers 3a, 3b, 3c which are alternately laminated. Multi-layer metal core printed board made by Heat-generating electronic components mounted on the board 1 via the mounting pads 6, respectively, and 7 are bayer hos. 8 is an inner layer pattern, 9 is a multi-layered metal module on which the heat-generating electronic components 4 and 5 are mounted. A card lock retainer for pressing and fixing the APC board 1 to the cooling block 1, 1 Reference numeral 1 is a contact surface of the cooling block 10 that contacts the multilayer metal core printed circuit board 1, and 12 is a contact surface. Contact of the metal core 2a of the multilayer metal core printed circuit board 1 that contacts the cooling block 10 The surface 13 is a lead of a heat-generating electronic component.

[0003]   Both the multilayer metal core printed circuit board 1 and the cooling block 10 have an end surface on one side. Of course, it has a symmetrical shape on the opposite side.

[0004]   The cooling block 10 of the multi-layer metal core printed circuit board 1 having the above-described configuration is mounted and removed by the car. It is done by the Drok Retainer 9, and when the multi-layer metal core printed circuit board 1 is mounted, gold The contact surface 12 of the metal core 2a and the contact surface 11 of the cooling block 10 are in close contact with each other. ing. The heat generated from the heat-generating electronic component 4 is, as indicated by the arrow 14, After being conducted to the lead 13-mounting pad 6-insulating layer 3a-metal core 2a , Conducted to the cooling block 10 via the contact surfaces 11 and 12 and finally to the cooling medium. It can conduct to the body (not shown).

[0005]   Next, the heat generated from the other heat-generating electronic component 5 is likewise indicated by the arrow 15. The lead 13-mounting pad 6-insulating layer 3c-metal core 2b-insulating layer 3b. A cooling block, after being conducted to the metal core 2a, via the contact surfaces 11 and 12 10 and eventually to a cooling medium (not shown).

[0006]   FIG. 6 is a cross-sectional view of main parts when a conventional metal core printed circuit board is mounted on a shelf. In this example, the metal core printed circuit board 1 provided with one metal core 2 is shown. Figure In the figure, 17 is a through hole, and 18 is heat generated in the through hole 17. This is a solder for soldering the leads 13 of the electronic component 4.   Both the metal core printed circuit board 1 and the cooling block 10 show one end surface. Of course, the opposite side also has a symmetrical shape.

[0007]   Attaching and detaching the metal core printed circuit board 1 having the above-described configuration to the cooling block 10 is a card. It is performed by the block retainer 9, and when the metal core printed circuit board 1 is mounted, the metal core (A) The contact surface 12 of the cooling block 10 and the contact surface 12 of the cooling block 10 are in close contact with each other. It Then, the heat generated from the heat-generating electronic component 4 is regenerated as indicated by an arrow 16. Conduction to the metal core 2 via the solder 13-solder 18-through hole 17-insulating layer 3 After that, it is conducted to the cooling block 10 via the contact surfaces 11 and 12 and finally Can be electrically conducted to a cooling medium (not shown).

[0008]

[Problems to be solved by the device]

  However, in the device having the above configuration, particularly in the multilayer metal core printed circuit board shown in FIG. Is generated from the heat-generating electronic component 5, and heat is generated by the lead 13-, as shown by an arrow 15. Contact from the mounting pad 6-insulating layer 3c-metal core 2b-insulating layer 3b-metal core 2a Since the heat is conducted to the cooling block 10 via the surfaces 11 and 12, the conduction efficiency is poor. There was a problem that   In addition, in the metal core printed circuit board shown in FIG. 6, the heat generated from the heat-generating electronic component 4 is The lead 13-solder 18-through hole 17- Edge layer 3-metal core 2-contact surfaces 11 and 12-conducted to cooling block 10 , The amount of heat transferred per unit time is proportional to the area passing through the conductive medium, However, there was a problem that satisfactory values could not be obtained.

[0009]   In order to eliminate the above-mentioned problems, the present invention connects the metal cores with a high thermal conductivity agent. In addition, the amount of heat transfer between the metal cores is increased to provide an excellent device for cooling heat-generating electronic components. The first purpose is to do so.   In addition, the contact area between the metal core and the cooling block is increased so that The second aim is to provide a device that increases the amount of heat transfer and is excellent in cooling heat-generating electronic components. It is a target.

[0010]

[Means for Solving the Problems]

  The first means of the multi-layered metal core printed circuit board according to the present invention comprises a plurality of metals which are parallel to each other. By filling the multiple through holes that penetrate between the cores with a high thermal conductivity agent, It conducts heat generated from parts in the order of metal core-high thermal conductivity agent-metal core. It   The second means is to provide the metal core with a tapered end and the cooling block has this metal core. The tapered end of the metal core is formed to match the tapered end of the The portion and the tapered portion of the cooling block are brought into contact with each other and fixed.

[0011]

[Action]

  The present invention improves the heat conduction between the metal cores by the high thermal conductive agent filled in the through holes. be able to.   Also, increase the contact area between the metal core and the cooling block to increase the transmission to the cooling block. The amount of heat is increased.

[0012]

【Example】

  FIG. 1 is a perspective view showing an embodiment of a multilayer metal core printed circuit board according to the present invention. Fig. 2 shows the requirements when the multilayer metal core printed circuit board shown in Fig. 1 is mounted on a shelf. FIG. In the figure, reference numeral 19 denotes a special metal core printed board 1 A through hole penetrating the metal core 2a, the insulating layer 3b, and the metal core 2b. It is a high thermal conductivity agent filled in the holes 19.   Both the multilayer metal core printed circuit board 1 and the cooling block 10 have one side end. Of course, it has a symmetrical shape on the opposite side (not shown). It

[0013]   The multi-layer metal core printed circuit board 1 having the above-described structure can be easily attached to and detached from the cooling block 10. When the multi-layer metal core printed circuit board 1 is mounted, A structure in which the contact surface 12 of the metal core 2a and the contact surface 11 of the cooling block 10 are in close contact with each other. Has become. The heat generated from the heat-generating electronic component 4 is , The lead 13-the mounting pad 6-the insulating layer 3a-the metal core 2a. After being conducted to the cooling block 10, it is conducted to the cooling block 10 from the contact surfaces 11 and 12. And finally conducted to a cooling medium (not shown).

[0014]   Next, the heat generated from the other heat-generating electronic component 5 is similarly generated by the arrow 15 and the arrow 2. 1, lead 13-mounting pad 6-insulating layer 3c-metal core 2b. -After being conducted to the metal core 2a through the high thermal conductivity agent 20 in the through hole 19, contact is made. The surfaces 11 and 12 are conducted to the cooling block 10 and finally the cooling medium (not shown). It is transmitted to.

[0015]   FIG. 3 is a main part when the metal core printed circuit board according to the present invention is mounted on a shelf. FIG. 3 is a cross-sectional view showing a metal core printed circuit board 1 provided with one metal core 2 in this example. You In the figure, 21 is a metal core having a tapered end 21a, and 22 is this metal. Tapered portion 2 formed to match the taper of tapered end portion 21a of metal core 21 Cooling block with 2a, 23 contacts the tapered end 21a of the metal core 21 Contact surface of the tapered portion 22a of the cooling block 22, The contact surface of the tapered end portion 21a of the metal core 21 that contacts the tapered portion 22a. It   Both the metal core printed circuit board 1 and the cooling block 10 show one end portion. Of course, it has a symmetrical shape on the opposite side (not shown).

[0016]   Next, the attachment / detachment of the metal core printed circuit board 1 having the above structure to the cooling block 10 is performed. It is performed by the card lock retainer 9, and when the metal core printed circuit board 1 is mounted, gold The tapered end portion 21a of the metal core 21 and the tapered portion 22a of the cooling block 22 are It has a structure of close contact. The heat generated from the heat-generating electronic component 4 is indicated by the arrow 1 6 and the arrow 25, its lead 13-solder 18-through hole 1 7-insulating layer 3-metal core 21-tapered end 21a of metal core 21-cooling block Is transmitted to the cooling block 22 via the tapered portion 22a of the rack 22 and finally cooled. It can be conducted to a reject medium (not shown).

[0017]

[Effect of device]

  As described in detail above, according to the multilayer metal core printed circuit board of the present invention, For example, a high thermal conductivity agent is filled in a plurality of through holes that penetrate between parallel metal cores. Since it was mounted on the side of the metal core opposite to the metal core that contacts the cooling block It can be expected that the heat generated from the heat-generating electronic components will also be efficiently conducted. The reliability of parts can be expected to improve.

[0018]   Also, the contact surface between the metal core printed circuit board and the cooling block is tapered. To form a metal core PCB by increasing the contact area with each other. The effect of increasing the amount of heat transferred from the cooling block to the cooling block can be expected and There is an effect that can be expected.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a multilayer metal core printed circuit board according to the present invention.

FIG. 2 is a cross-sectional view of essential parts when the multilayer metal core printed board shown in FIG. 1 is mounted on a shelf.

FIG. 3 is a cross-sectional view of an essential part when a metal core printed circuit board according to the present invention is mounted on a shelf.

FIG. 4 is a perspective view showing a conventional multilayer metal core printed circuit board.

5 is a cross-sectional view of essential parts when the multilayer metal core printed circuit board shown in FIG. 4 is mounted on a shelf.

FIG. 6 is a cross-sectional view of essential parts when a conventional metal core printed circuit board is mounted on a shelf.

[Explanation of symbols]

1 Multilayer metal core printed circuit board 2,2a, 2b Metal core 3a-3c insulating layer 4,5 Heat generating electronic parts 8 inner layer pattern 10 Cooling block 13 lead 19 through holes 20 High thermal conductivity agent 21 metal core 22 Cooling block

Claims (2)

[Scope of utility model registration request] 1. A multi-layer metal core printed circuit board on which heat-generating electronic components are mounted and metal cores are laminated via an insulator, and a plurality of through holes penetrating between a plurality of metal cores parallel to each other, A multi-layer metal core printed circuit board comprising a high thermal conductivity agent filled in the through hole, and configured to conduct heat generated from the heat-generating electronic component in the order of metal core-high thermal conductivity agent-metal core. 2. A metal core printed circuit board having a heat generating electronic component mounted thereon and having a metal core and a cooling block in contact with an end portion of the metal core, wherein the metal core has a tapered end portion. The cooling block has a tapered portion formed to match the tapered end portion of the metal core, and the tapered end portion of the metal core and the tapered portion of the cooling block are in contact with and fixed to each other. Printed board.