Construction of a cell microarray chip.

<p>(A) Photo of an actual cell microarray chip. (B, C) SEM images of a cell microarray chip. The cell microarray chip comprises 20,944 microchambers in a plastic slide on a glass slide. The cell microarray chip has 112 (14×8) clusters, each having 187 microchambers. (D) Each microchamber is 105 µm in upper diameter, 50 µm in depth, and has the shape of a frustum with a 68-µm diameter flat bottom for the accommodation of leukocytes as a monolayer.