Abstract:
A microelectronic device (10) provides decreased use of bar area to form contacts between a conductive strap (24) or interconnect and subsequent levels. The conductive strap comprises a conducting layer (130) and an overlying semiconducting layer (132). Connection to subsequent levels is made generally overlying substrate conductive areas such as a gate (14) and/or a moat (16). Connection to conductive sublayer (130) is accomplished by doping an overlying semiconductor sublayer (132). Any counter-doping of substrate conductive areas is blocked by an overlying well of dopant-masking (33) or sufficiently thick semiconducting (32) material.
Abstract:
A thin film transistor and method for forming the same are disclosed. The transistor comprises a gate conductor (14) and a gate insulator (16). A semiconductor channel layer (18) is formed adjacent the gate insulator (16). A mask block (22) is formed covering a channel region (30) in the channel layer (18). A source region (26) and a drain region (28) are formed in the channel layer (18) adjacent opposite ends of the mask block (22). Conductive bodies (32) and (34) are formed in contact with source region (26) and drain region (28), respectively. Electric contacts (42) and (44) are then formed in contact with conductive bodies (32) and (34), respectively.
Abstract:
A method for connecting different conducting layers of a microelectronic device is disclosed. The method comprises: providing a first conducting layer (40); forming a first insulating layer (42) over said first conducting layer (40); forming a second conducting layer over said first insulating layer (42); patterning said second conducting layer to form a conducting element (44) over said first insulating layer (42) whereby the top surface of said first insulating layer (42) is protected from deleterious effects of further process steps; forming a second insulating layer (46) over said conducting element (44) and said first insulating layer (42) selectively removing said first insulating layer (42) and said second insulating layer (46), using an etch process which is selective over said insulating layers (42, 46) said conducting element (44) and said first conducting layer (40), to form a contact region (48) which straddles an edge of said conducting element (44) such that a portion of said conducting element (44) is exposed adjacent to an exposed portion of said conducting layer (40) with said first insulating layer (42) vertically interposed; and forming a third conducting layer (50) within said contact area (48). Other methods are also disclosed.
Abstract:
An elevated transistor is provided having minimized junctions (33) and a polysilicon pad (27) over the transistor insulating regions (12) and partially over the moat (14). A conductive layer (32) overlays the polysilicon pad (27) and partially overlays the moat (14) in the interim areas (29).
Abstract:
This is a method of forming a semiconductor integrated circuit with isolation regions, (possibly wide and narrow) comprising of a thin oxide film and deposited anisotropic oxide. It uses an inorganic layer (e.g. noncrystalline silicon) to mask what will be active areas and allows for the growth of a thermal oxide film in the trenches reducing the parasitic channel formation along the trenches. The use of anisotropic oxide to fill the trenches allows for wide and narrow trenches to be simultaneously filled to the desired depth. The removing of inorganic layer and the use of anisotropic oxide to fill the trenches produces a flat planar surface and finer isolation regions.
Abstract:
A transistor is disclosed which comprises a gate conductor 34 insulated from a channel region 55 by a gate insulator layer 38. A spacer insulator block 46 is used to accurately space a drain region 52 a predetermined distance from the gate conductor 34. A dopant source body 48 is used to form the drain region 52 such that the formation of the drain region 52 is a self-aligned process. According to the teachings of the present invention, the drain region 52 can be accurately spaced from the gate conductor 34 to reduced field enhanced leakage current during the operation of the transistor.