Device for the actively-controlled and localized deposition of at least one biological solution

A process for fabricating a device for depositing biological solutions including at least one flat silicon lever having a central body and an end region that forms a tip in which a slit or groove is provided, comprising:

• a) at least one step of depositing silicon oxide on a front face of a silicon-on-insulator substrate having a buried insulating layer;
• b) producing, for each lever, at least one metal track;
• c) at least one chemical or ion etching step carried out via the front face of the silicon substrate in order to define the outline of the levers, and at least one slit or groove, the outline of the levers being defined by chemical or ion etching down to the buried insulating layer;
• and
• d) a chemical or ion etching step carried out via the rear face of the substrate in order to remove it, including the buried insulating layer, and to free at least one lever.