Ceramic aluminum-coated plate for IGBT (Insulated Gate Bipolar Translator) packaging and preparation method thereof: Fid-Bau Portal

Ceramic aluminum-coated plate for IGBT (Insulated Gate Bipolar Translator) packaging and preparation method thereof

YANG XIAOZHAN

The invention discloses a ceramic aluminum-coated plate for IGBT packaging and a preparation method thereof, and relates to the technical field of ceramic metallization, the ceramic aluminum-coated plate comprises a ceramic bottom plate, an active metal liquid film and a composite aluminum plate, the outer surface of the ceramic bottom plate is uniformly covered with the active metal liquid film, and the ceramic bottom plate is connected with the composite aluminum plate through the active metal liquid film. According to the invention, a certain proportion of silicon carbide is added into the production raw materials of clay, quartz and feldspar of the ceramic bottom plate, so that the density, compressive strength, thermal conductivity and other properties of the composite ceramic containing silicon carbide are obviously improved, and the single component of a single ceramic bottom plate is avoided; and when the outer side of the ceramic bottom plate is covered with an aluminum plate, a composite aluminum plate composed of aluminum-magnesium alloy, industrial pure aluminum and aluminum-copper alloy is adopted, so that the corrosion resistance and the pressure resistance of the workpiece are enhanced, and meanwhile, the heat-conducting property of the workpiece is also enhanced.

本发明公开了一种用于IGBT封装的陶瓷覆铝板及其制备方法，涉及陶瓷金属化技术领域，包括陶瓷底板、活性金属液膜和复合铝板，所述陶瓷底板的外表面上均匀覆盖有活性金属液膜，所述陶瓷底板与复合铝板通过活性金属液膜连接。本发明通过在陶瓷底板生产原料黏土、石英以及长石中再添加一定比例的碳化硅，使得含有碳化硅的复合陶瓷的密度、抗压强度、热导率等性能都有较明显提升，避免通过单一陶瓷底板成分单一，导致工件的导热性能以及抗压强度弱易被损坏的问题，在陶瓷底板外侧覆盖铝板时，采用铝－镁合金、工业纯铝、铝－铜合金组成的复合铝板，既增强了工件的耐腐蚀性和抗压性，同时也增强了工件的导热性能。

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