A raised-bitline, contactless flash memory device with trenches on a semiconductor substrate doped with a first conductivity type includes a first well of an opposite conductivity type comprising a deep conductor line to a device, and a second well of the first conductivity type above the first...http://www.google.es/patents/US5679591?utm_source=gb-gplus-sharePatente US5679591 - Method of making raised-bitline contactless trenched flash memory cell
Method of making raised-bitline contactless trenched flash memory cell
