Barrier layer for ferroelectric capacitor integrated on silicon

H - Electricity – 01 – L

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H01L 27/115 (2006.01) H01L 21/02 (2006.01) H01L 27/06 (2006.01)

Patent

CA 2225681

A ferroelectric cell in which a ferroelectric stack (44) of a perovskite ferroelectric sandwiched by cubic perovskite metal-oxide conductive electrodes (50, 56) are formed over a silicon body, such as a polysilicon plug (42) penetrating a field oxide (40) over a silicon transistor (34). According to the invention, an oxidation barrier (46) is placed between the lower metal- oxide electrode and the polysilicon. The oxidation barrier may be: a refractory metal sandwiched between two platinum layers which forms a refractory oxide in a platinum matrix; an intermetallic barrier beneath a platinum electrode, e.g., of NiAl; or a combination of Ru and SrRuO3 or similar materials. Thereby, the polysilicon plug is protected from oxidation.

L'invention porte sur une cellule ferroélectrique comportant un empilement ferroélectrique (44) de pérovskite ferroélectrique prise en sandwich entre des électrodes conductrices cubiques de perovskite et d'oxyde métallique (50, 56) constituées sur un corps de silicium tel qu'un plot de polysilicium (42) pénétrant dans un champ d'oxyde (40) recouvrant un transistor au silicium (34). Selon l'invention, une barrière (46) d'oxydation est placée entre l'électrode d'oxyde métallique et le polysilicium. La barrière d'oxydation peut consister: en un métal réfractaire pris en sandwich entre deux couches de platine formant un oxyde réfractaire dans une matrice de platine; en une barrière intermétallique (par exemple de NiAl) placée sous une électrode de platine; ou une combinaison de Ru et de SrRuO¿3? ou de matériaux similaires. Le plot de polysilicium se trouve de ce fait protégé de l'oxydation.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Barrier layer for ferroelectric capacitor integrated on silicon does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Barrier layer for ferroelectric capacitor integrated on silicon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Barrier layer for ferroelectric capacitor integrated on silicon will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1574276

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.