Patent ID: 6989580
Filing Date: 2006-01-24
Classification: H01L

Abstract:
1. A cell array, comprising a plurality of cells, each cell including a selection bipolar transistor and a storage component, each said selection bipolar transistor having a first, a second and a control region, and each said storage component having a first and a second terminal, said first region of each bipolar transistor being connected to said first terminal of a respective one of the storage components, said cell array comprising a body of semiconductor material including: a common conduction region of a first conductivity type, forming said second regions of said selection bipolar transistors; a plurality of active area regions of a second conductivity type and a first doping level, overlying said common conduction region and forming said control regions of said selection bipolar transistors; a plurality of second conduction regions of said first conductivity type formed in said active area regions and forming said first regions of said selection bipolar transistors; and a plurality of control contact regions of said second conductivity type and a second doping level, higher than said first doping level, formed in said active area regions and connected to biasing lines.