Maybe the chemically etched can form the taper but the hole dimension maybe too big if only etch from one side.

化学蚀刻的模板也可以成锥形，但是如果只从一面腐蚀，开孔尺寸可能太大。

youdao

Maybe the chemically etched can form the taper but the hole dimension maybe too big if only etch from one side.

化学蚀刻的模板也可以成锥形，但是如果只从一面腐蚀，开孔尺寸可能太大。

youdao