Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – Having insulated gate
Patent
1998-04-21
1999-11-23
Bowers, Charles
Semiconductor device manufacturing: process
Making field effect device having pair of active regions...
Having insulated gate
438254, 438396, 438397, H01L 218242
Patent
active
059899557
ABSTRACT:
A DRAM capacitor structure and its manufacturing include covering a semiconductor substrate with a first conducting layer. A first insulating layer and a second insulating layer are alternately stacked at least once above the first conducting layer to form a multi-layered structure. A contact window opening is formed in the multi-layered structure to expose a source/drain region located above the semiconductor substrate. A pattern is etch-defined on the multi-layered structure, using the first insulating layer as an etching stop layer. Part of the second insulating layer is etched away to form a cross-sectional profile similar to twin towers, with each tower having the form of a vertical T-stack. A second conducting layer covers the multi-layered structure. The first insulating layer and the second insulating layer of the multi-layered structure, as well as the second conducting layer in a top part of the multi-layered structure, are etched away to form a lower electrode. A dielectric layer is formed above the lower electrode. An upper electrode is formed above the dielectric layer.
REFERENCES:
patent: 5434812 (1995-07-01), Tseng
patent: 5637523 (1997-06-01), Fazan et al.
patent: 5688709 (1997-11-01), Rostoker
patent: 5891772 (1999-04-01), Hsu
patent: 5910667 (1999-06-01), Hsu
Bowers Charles
Chen Jack
United Microelectronics Corp.
LandOfFree
Method of forming stacked and trench type DRAM capacitor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of forming stacked and trench type DRAM capacitor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming stacked and trench type DRAM capacitor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1221101