Abstract A novel double gates flip-structure enhancement-mode (E-mode) high electron mobility transistor with step field plate (DFF HEMT) is proposed. It features face-to-face double gates. including a top trench MIS gate with a step field plate and a bottom planar MIS gate. which is shorted together. https://parisnaturalfoodes.shop/product-category/zero-pwd-auto-dishwashing/