Cancer cell-trapping metal filter, cancer cell-trapping metal filter sheet, cancer cell-trapping device, and manufacturing methods therefor

A method of manufacturing a cancer cell-trapping metal filter sheet, comprising:

• a process of laminating a photoresist on metal foil;
• a process of overlapping a photomask including a plurality of blocks of wave-shaped light-transmitting portions on the photoresist and exposing the photoresist;
• a process of removing an uncured portion of the photoresist by development to form photoresist patterns;
• a process of performing metal plating between the photoresist patterns to form metal plating patterns having a height lower than a height of the photoresist patterns;
• a process of removing the metal foil by chemical dissolution to obtain a structure including the metal plating patterns and the photoresist patterns;
• and
• a process of removing the photoresist patterns from the structure to obtain the metal plating patterns having a through-hole corresponding to the light-transmitting portion.