通常，第一层为氧化硅，绝缘体，其被蚀刻至所需的厚度。
Usually, the first layer is of silicon oxide, an insulator, which is etched to a desired thickness.
铝表面的氧化层是一种电的绝缘体。
The aluminum surface of the oxide layer is an electrical insulator.
所以我们一开始就是底部一层导体，一层绝缘体，中间再一层导体。
So we have started off with the conductor on the bottom, an insulator, a conductor in the middle.
在圆柱形绝缘体上沉积一层金属薄膜制成。
This is made by depositing a thin film of metal on a cylindrical insulating support.
在圆柱形绝缘体上沉积一层金属薄膜制成。
This is made by depositing a thin film of metal on a cylindrical insulating support.
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