The oxide layer is formed on the two-step diffusion drain electrode structural layer and completely superposed on the two-step diffusion drain electrode structural layer.
氧化层是形成于双重扩散漏极结构层上，且氧化层完全重叠于双重扩散漏极结 构层上。
2
The superposed structure has needle punched polyester wool as bottom layer, polyethylene film as the middle layer and hot rolled non-woven polyester fabric as the upper layer.