| 摘要 |
In a method of making a silicon carbide semiconductor device having a MOSFET, after a mask is placed on a surface of a first conductivity type drift layer of silicon carbide, ion implantation is performed by using the mask to form a lower layer of a deep layer extending in one direction. A first conductivity type current scattering layer having a higher concentration than the drift layer is formed on the surface of the drift layer. After another mask is placed on a surface of the current scattering layer, ion implantation is performed by using the other mask to form an upper layer of the deep layer at a position corresponding to the lower layer in such a manner that the lower layer and the upper layer are connected together.
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