<p>A microchamber structure (100) comprising a base layer (120), a lid layer (130), and at least one microchamber (140) having a cross-sectional shape with a depth (d) of less than 1000 microns and a width (w) of less than 1000 microns. The base layer (120) includes a depression (122) and the lid layer (104) includes a projection (132) positioned within the depression (122) to together define the cross-sectional shape of the microchamber (140).</p>
