A kind of IGBT power model
Technical field
The present invention relates to the IGBT power model.
Background technology
The fast development of power electronic technology is day by day urgent to the modular requirement of power electronic device, also the performance of module is had higher requirement simultaneously, and nowadays, power model is just towards high-power, high frequency, high reliability, low-loss future development.Therefore, challenge has been proposed the performance of heat conductive insulating substrate.The IGBT power model is as a kind of compound full-control type voltage driven type power semiconductor, has the advantage of low conduction voltage drop two aspects of the high input impedance of MOSFET and GTR concurrently.The structure of IGBT power model generally is made of the heat conductive insulating substrate between chip, substrate and chip and the substrate, at present, heat conductive insulating substrate in the IGBT modular structure adopts scale copper and pottery to consist of, yet, the employing of scale copper is unfavorable for scattering of heat, thereby has limited the radiating efficiency of IGBT module.
Summary of the invention
Technical problem to be solved by this invention provides a kind of IGBT power model, and it has high heat dispersion.
Technical solution technical scheme that problem adopts of the present invention is: a kind of IGBT power model, comprise chip, heat conductive insulating substrate, substrate, be fixedly connected with by the first soldering layer between chip and the heat conductive insulating substrate, be fixedly connected with by the second soldering layer between substrate and the heat conductive insulating substrate, the heat conductive insulating substrate is comprised of upper copper-clad, ceramic layer, lower copper-clad, and the thickness of lower copper-clad is 1.5-2.0mm.The heat conductive insulating substrate is with chip and substrate insulation, and between chip and substrate transferring heat, the heat conductive insulating substrate not only plays insulating effect, also play a part the conduction heat, be about to the heat that insulated gate bipolar transistor and diode chip for backlight unit produce and be transmitted to from top to down substrate, and then be transmitted to radiator by substrate, power model is dispelled the heat, about the heat conductive insulating substrate increases by 500 than the lower copper-clad thickness of the heat conductive insulating substrate in the conventional I GBT power model among the present invention, increased area of dissipation, overcome thin copper layer and be unfavorable for the defective that heat scatters, greatly improved the heat dispersion of IGBT power model.
When adopting technique scheme, further technical scheme below the present invention can also adopt or make up and adopt:
Substrate is the copper substrate.
The thickness of the first soldering layer is 0.05mm.
The thickness of the second soldering layer is 0.1mm.
The thickness of upper copper-clad is 0.3mm.
The thickness of ceramic layer is 0.6-0.65mm.
The invention has the beneficial effects as follows: by changing the dimensional parameters of material in the conventional I GBT modular structure, improved the heat dispersion of IGBT module, overcome the defective that traditional IGBT module exists in the background technology.IGBT power model of the present invention is compared with traditional IGBT power model, and area of dissipation increases 2-3 doubly, and radiating efficiency improves 2-3 doubly.
Description of drawings
Fig. 1 is the structural representation of IGBT power model of the present invention.
Embodiment
With reference to accompanying drawing.
IGBT module of the present invention comprises chip 1, heat conductive insulating substrate, copper substrate 7, be fixedly connected with by the first soldering layer 2 between chip 1 and the heat conductive insulating substrate, the thickness of the first soldering layer is 0.05mm, be fixedly connected with by the second soldering layer 6 between substrate 7 and the heat conductive insulating substrate, the thickness of the second soldering layer is 0.1mm, the heat conductive insulating substrate is formed by legal (DBC) between direct by upper copper-clad 3, ceramic layer 4, lower copper-clad 5, the thickness of lower copper-clad 5 is 1.5mm, is extended to 5 times than the lower copper-clad thickness 0.3mm in the conventional I GBT power model.The heat conductive insulating substrate is with chip 1 and substrate 7 insulation, and between chip 1 and substrate 7 transferring heat, the heat conductive insulating substrate is transmitted to substrate 7 from top to down with the heat that chip 1 produces, and then be transmitted to radiator by substrate 7, power model is dispelled the heat, the thickness of lower copper-clad 5 increases to 1.5mm by the 0.3mm in the conventional I GBT power model, and the heat radiation of the heat conductive insulating substrate of the lower copper-clad that adopts these two kinds of thickness is compared, and supposes that heat is with 45.Scatter under the angle, lower copper-clad thickness is increased to 1.5mm by 0.3mm after, area of dissipation will be increased to 2.3 times, namely radiating efficiency will be brought up to 2.3 times.
Above-mentioned specific embodiment is used for by reference to the accompanying drawings technical scheme of the present invention being further described in detail, but scope of the present invention can not be confined to the content of embodiment.One skilled in the art would recognize that the present invention contained all alternatives, improvement project and the equivalents that might comprise in claims scope.