Cartridge comprising a plurality of analysis chambers for receiving a biological liquid

An analysis cartridge for analyzing a biological liquid comprising a liquid pour opening emptying into an array of channels in which the biological liquid seeps by capillary action, the array of channels defining a plurality of analysis paths each comprising an analysis chamber, the array of channels comprising for each analysis path an upstream channel for fluidly connecting the opening to the analysis chamber, and a vent channel for fluidly connecting the analysis chamber to a vent, the analysis cartridge including a support having a main surface and an upper cover formed at least in part of a transparent material and also having a main surface, the upper cover and the support being assembled one to another by their main surface, at least a portion of the array of channels including complementary recesses formed in part on the main surface of the support and in part on the main surface of the upper cover, each channel being defined by a structured channel wall provided by the support and by an opposite channel wall provided by the upper cover, the two walls facing each other and defining a channel height, the structured wall having at least one step, defining on either side of the at least one step:

• a first segment of the channel in which the structured wall has a first surface energy and a first elevation defining a first height of the channel;
• and
• a second segment of the channel in which the structured wall has a second surface energy and a second elevation defining a second height of the channel;
• the first height of the channel and the first surface energy of the structured wall being greater than the second height of the channel and the second surface energy, respectively;
• the support further comprising:
• a rigid substrate having the first surface energy, the substrate incorporating a magnetic layer disposed under a non-magnetic film covering the magnetic layer;
• and
• an interlayer film having the second surface energy, the interlayer film disposed on the substrate, the interlayer film defining part of the fluid array of the cartridge and having a cutout pattern for forming the recesses of the support and uncovering an exposed surface of the substrate,
• wherein the main surface of the support comprises an exposed surface of the interlayer film having the second energy of surface and the exposed surface of the substrate having the first surface energy.