Abstract:
This invention relates to a memory cell (100) having a first switch device (105), a second switch device (107) and a capacitor (109). The first switch device (105) has: a control terminal for receiving a first control signal (CS 1 ) transmitted by a first select line (102), wherein the first switch device is turned on or turned off according to the first control signal (CS 1 ); a first terminal, coupled to a data line (101); and a second terminal. The second switch device (107) has: a first terminal, coupled to the second terminal of the first switch device (105); a control terminal for receiving a second control signal (CS2) transmitted by a second select line (103), wherein the second switch device (107) is turned on or turned off according to the second control signal (CS2); and a second terminal. The capacitor (109) has a first terminal coupled to the second terminal of the second switch device (107) and a second terminal coupled to a predetermined voltage level. The data is read from the capacitor (109) or written to the capacitor (109) via the data line (101).
Abstract:
A dual channel transistor (50) includes a semiconductor island (22) isolated by a first shallow trench isolation (STI) (12) extending along a first direction and a second STI (20) extending along a second direction, wherein the first direction intersects the second direction. The dual channel transistor (50) further includes a gate trench (26) recessed into the semiconductor island (26) and extending along the second direction. A gate (30) is located in the gate trench (26). A first U-shaped channel region (60) is formed in the semiconductor island (22). A second U-shaped channel region (62) is formed in the semiconductor island (22), wherein the second U-shaped channel region (62) is segregate from the first U-shaped channel region (60) by the gate (30). During operation, the gate (30) controls two U-shaped channel regions (60, 62) simultaneously.
Abstract:
A single-gate FinFET structure includes an active fin structure having two enlarged head portions and a tapered neck portion that connects the enlarged head portions with an underlying ultra-thin body. Two source/drain regions are doped in the two enlarged head portions respectively. An insulation region is interposed between the two source/drain regions. A trench isolation structure is disposed at one side of the tuning fork-shaped fin structure. A single-sided sidewall gate electrode is disposed on a vertical sidewall of the active fin structure opposite to the trench isolation structure.
Abstract:
A dual channel transistor (50) includes a semiconductor island (22) isolated by a first shallow trench isolation (STI) (12) extending along a first direction and a second STI (20) extending along a second direction, wherein the first direction intersects the second direction. The dual channel transistor (50) further includes a gate trench (26) recessed into the semiconductor island (26) and extending along the second direction. A gate (30) is located in the gate trench (26). A first U-shaped channel region (60) is formed in the semiconductor island (22). A second U-shaped channel region (62) is formed in the semiconductor island (22), wherein the second U-shaped channel region (62) is segregate from the first U-shaped channel region (60) by the gate (30). During operation, the gate (30) controls two U-shaped channel regions (60, 62) simultaneously.
Abstract:
A method for forming a semiconductor memory device with buried contacts. A substrate (100) is provided, wherein the substrate has recessed gates (118) and deep trench capacitor devices (102) therein. Protrusions (120) of the recessed gates and upper portions (104) of the deep trench capacitor devices are revealed. Spacers (124) are formed on sidewalls of the upper portions and the protrusions. Buried portions of conductive material (130) are formed in spaces between the spacers. The substrate, the spacers and the buried portions to form parallel shallow trenches are patterned to form parallel shallow trenches (132) for defining active regions. A layer of dielectric material is formed in the shallow trenches, wherein some of the buried portions serve as buried contacts.
Abstract:
A method for forming a semiconductor device. A substrate (100) is provided, wherein the substrate has recessed gates (118) and deep trench capacitor devices (102) therein. Protrusions (120) of the recessed gates and upper portions of the deep trench capacitor devices are revealed. Spacers (124) are formed on sidewalls of the upper portions (104) and the protrusions. Buried portions of conductive material (134a,b) are formed in spaces between the spacers. The substrate, the spacers and the buried portions are patterned to form parallel shallow trenches (132) for defining active regions. A layer of dielectric material is formed in the shallow trenches, wherein some of the buried portions (134a) serve as buried bit line contacts. Word lines (140) are formed across the recessed gates (120), wherein at least one of the word lines comprises portions overlapping the recessed gates. At least one of the overlapped portions has a narrower width than at least one of the recessed gates.
Abstract:
A phase change memory device and fabrication method thereof is provided. The phase change memory device includes a substrate (300). A metal plug (304) is disposed on the substrate and a phase change material film (306a) is disposed on the metal plug, wherein the metal plug is electrically connected to the phase change material film. A heating electrode (312), preferably ring-shaped, is disposed on the phase change material film, wherein the heating electrode is electrically connected to the phase change material film. A conductive layer (316) is disposed on the heating electrode.
Abstract:
A method of manufacturing a capacitor includes forming a bottom electrode layer; forming an insulator on the bottom electrode layer; crystallizing the insulator; and forming a top electrode layer on the crystallized insulator. As such, the leakage problem due to thinner top electrode layer and smaller critical dimension of the capacitor can be reduced. In addition, possibility for the capacitors to collapse is reduced, and the electrical performance of the capacitor won't be affected by the collapse problem.