https://blog.faceutil.com/2022/10/06/%e2%98%853dp-chip%e2%98%85-3dp-chip%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-3dp-chip%ec%b5%9c%ec%8b%a0%eb%b2%84%ec%a0%84-%e3%83%80/