Abstract
The present invention relates to a cell counting/classifying chip suitable for counting the quantity of the cell in a fluid sample, comprising: a transparent base and a micro-tunnel unit hollowly formed in the base. The micro-tunnel unit has a main passage, two parallel minor passages whose heads connecting each other alternately arranged at two sides of the main passage, and a converging passage connected to the ends of the main passage and the minor passages. The heads of the minor passages are connected to each other and to a leading aperture formed on the surface of the base for allowing the entrance of water fluid. The water fluid enters the two minor passages through the leading aperture and forms two side sheath flows when it passes the converging passage, wherein the two side sheath flows is capable of restricting the width of the fluid sample flowed from the main passage to the width for the passage of a single cell; therefore, in coordination with an image capturing device to capture the image of the fluid sample in the converging passage, the quantity of the cell inside can be counted.