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. 2022 Apr 29;13:20417314221085390. doi: 10.1177/20417314221085390

Figure 2.

Figure 2.

(a) MN fabrication methods are a subset of micro-electro-mechanical fabrication processes that diverged into three major groups: bulk micromachining, surface micromachining, and LIGA. (b) Photolithography process is one of the methods to the pattern desired figures on biomaterials, subsequently creating the 3D shape via wet or dry etching.