The subject of the technological offer is a device and a method for producing an innovative microfluidic device (chip), intended for encapsulation (closing) of active substances or living cells (including stem cells) and covering with a semi-permeable coating with controlled properties. The device is used for continuous and automatic production of monodispersion of microcapsules with a diameter of several dozen micrometres, enabling prolonged release of substances from their interior, e.g. medicinal, food, cosmetic products, etc.