a. Please send me the drawing of the board. It must be a file created with a CAD program(Auto CAD).b. Please tell me the section information of the substrate.The thickness of the material should be divided by the material.c. Please let me know the characteristics of each layer of the board. (and datasheet for materials)Depending on the properties of each material, the characteristics of thermal conductivity and so on are different. Please specify it in detail.