TABLE II.

Technology comparison of 2D cell arrays or chip.

Cell array/array-like arrangement
Type	Cell density on the retaining area	Area for single array or chip		Maximum cell number in single array or chip	References
Active cell array	∼200 cells/mm2	∼56 mm2	(7 mm × 8 mm)	∼1.0 × 104 cells/chip	67
	∼330 cells/mm2,a	∼ 7.5 mm2	(2.5 mm × 3 mm)	∼800 cells/chip	69
Passive or stationary cell array	∼1800 cells/mm2	∼12 mm2	(3 mm × 4 mm)	∼3.3 × 104 cells/dish	73
	∼2500 cells/mm2	∼3.14 mm2	(2 mm circle)	∼7.8 × 103 cells/chip	72
	∼3450 cells/mm2	∼9 mm2	(3 mm × 3 mm)	∼3.1 × 104 cells/array	75
Self-assembled cell chip	∼14 300 cells/mm2	∼19.63 mm2	(5 mm circle)	∼3.0 × 105 cells/chip human peripheral blood mononuclear cells	This study (SACA)

^a∼330 cells/mm² in the picture, and ∼3300 cells/mm² in the article.