Method for producing a capacitor

A method for manufacturing a capacitor, comprising:

• providing a raw structure having a doped substrate and at least one dielectric layer, wherein a first area and a second area of the substrate are separated by an electrically isolating structure, the first area being arranged between first and second isolation areas of the isolating structure, the doped substrate in the first area representing a first capacitor electrode of the capacitor;
• applying an electrically conductive layer on the at least one dielectric layer above the first and the second area;
• applying a mask layer on the electrically conductive layer and patterning the mask layer for forming a mask above the first area;
• etching away the electrically conductive layer and at least one of the at least one dielectric layer in the second area with the mask above the first area, so that the electrically conductive layer and the at least one dielectric layer are removed outside the first area, whereby in the first area, a second capacitor electrode is formed from the conductive layer, and a patterned capacitor dielectric layer is formed from the dielectric layer;
• and
• forming elements of an active device in the second area.