Membrane structure body having matrix structure and biomolecule filter using same

A membrane structure for filtering a sample comprising a plurality of biomolecules of varying sizes, the membrane structure comprising:

• a filtering part having a first surface and a second surface opposite to the first surface the filtering part comprising a plurality of window regions spaced apart by a blocking region interposing each window region of the plurality of window regions, each window region of the plurality of window regions having a plurality of window cells arranged in a matrix configuration defining a flow path along the first surface, the flow path including a flow path end, each window region having a plurality of micro-holes, each micro-hole of the plurality of micro-holes having a substantially equal predetermined size, the plurality of window regions being configured to enable biomolecules within the sample having up to a predetermined size to pass from the first surface to the second surface and to retain biomolecules having a size larger than the predetermined size on the first surface as the sample flows along said flow path thereby enabling a size-based separation of biomolecules along the plurality of window regions;
• and
• a support part extending from the filtering part so as to support the filtering part;
• and
• a membrane structure outlet disposed at the flow path end and configured to receive the biomolecules having up to the predetermined size.