Which is at the development stage to nitric acid as the main Etchant can virtually no side erosion problems, etching the wires of a side-wall after nearly vertical.

• 而侧处在斥地阶段的以硝酸为主的蚀刻液可以到达实在不有有侧蚀题目，蚀刻后的导线侧壁挨近笔直。