Heat transfer structure for a semiconductor device utilizing a bismuth glass layer

An inverter vehicle comprising:

• a motor for driving an axle directly connected to wheels;
• an inverter for controlling a driving force of said motor and having at least one semiconductor apparatus including a primary circuit section having semiconductor devices disposed on a first metal material, a control circuit section for transmitting control signals to said primary circuit section, and external input-output terminals to be connected to said primary circuit section and said control circuit section, a second metal material for exchanging heat generated from said semiconductor devices into the ambient environment, an electric insulating material interposed between said first metal material or said external input-output terminals and said second metal material, said electric insulating material being a bismuth glass layer, and an intermediate layer comprising a metal or metal product or a combination of said metal and said metal product interposed between said first metal material or said external input-output terminals and said bismuth glass layer, and between said second metal material and said bismuth glass layer, said intermediate layer being conjugated with said bismuth glass layer;
• and
• a battery for driving said inverter or recovering a power from said motor.