Patent ID: 6541839
Filing Date: 2003-04-01
Classification: H01L

Abstract:
Microelectronic structure comprising:at least one low voltage element and at least one high voltage element formed on a semiconductor substrate having a first type of doping and means of protection designed to protect the low voltage element against spurious effects generated at the high voltage element, wherein the means of protection include: at least one channel penetrating into the substrate and passing through the low voltage element, said at least one channel being at least partially filled with a doped semiconductor material having a doping type opposite to the doping type of the substrate, a semiconductor zone which has a type of doping, opposite to the type of doping of the substrate and which, at the least, encloses the wall or walls of the channel or channels so that said at least one channel drain off the spurious currents generated at the high voltage element, and a contact point in this zone and/or in the trench, said contact point enabling the output of the spurious currents.