Semiconductor device manufacturing: process – Making field effect device having pair of active regions... – On insulating substrate or layer
Patent
1996-11-07
1999-02-16
Trinh, Michael
Semiconductor device manufacturing: process
Making field effect device having pair of active regions...
On insulating substrate or layer
438153, 438157, 438199, H01L 2184
Patent
active
058720294
ABSTRACT:
A process is provided for producing active and passive devices on various levels of a semiconductor topography. As such, the present process can achieve device formation in three dimensions to enhance the overall density at which an integrated circuit is formed. The multi-level fabrication process not only adds to the overall circuit density, but does so with emphasis placed on high performance interconnection between devices on separate levels. The interconnect configuration is made as short as possible between features within one transistor level to features within another transistor level. This interconnect scheme lowers resistivity by forming a gate conductor of an upper level transistor upon a gate conductor of lower level transistor. Alternatively, the gate conductors can be a single conductive entity. In order to abut the gate conductors together, or form a single gate conductor, the upper level transistor is inverted relative to the lower level transistor. In addition to the inverted, shared gate conductor, the multi-level transistor fabrication process incorporates formation of openings and filling of those openings to produce interconnect to junctions of the upper/lower transistors. Interconnecting the gate conductors of a pair of stacked transistors and connecting specific junctions of those transistors allows formation of a high density inverter circuit hereof.
REFERENCES:
patent: 4766076 (1988-08-01), Aoki et al.
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patent: 5714394 (1998-02-01), Kadosh et al.
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patent: 5770483 (1998-06-01), Kadosh et al.
Gardner Mark I.
Kadosh Daniel
Advanced Micro Devices , Inc.
Daffer Kevin L.
Trinh Michael
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