Abstract:
Method for forming a semiconductor memory device with a recessed gate. A substrate (208), having a plurality of deep trench capacitors (206) therein, is provided wherein upper portions of the deep trench capacitor devices are revealed. Spacers (226) on sidewalls of the upper portions of the deep trench capacitors are formed to form a predetermined region surrounded by the deep trench capacitor devices. The predetermined region of the substrate is etched using the spacers and the upper portions of the deep trench capacitors serve as a mask to form a recess (228), and a recessed gate (230,232) is formed in the recess.
Abstract:
A method for forming a semiconductor device is provided. The method comprises providing a substrate (100) with recessed gates (122) 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 (134a,b) of conductive material are formed in spaces between the spacers. The substrate, the spacers and the buried portions are patterned to form parallel shallow trenches for defining buried bit line contacts and capacitor buried surface straps. A layer of dielectric material is formed in the shallow trenches. Word lines (140) are formed across the recessed gates. Bit lines (150) are formed to electrically connect the buried bit line contacts (134a) without crossing the capacitor buried surface straps (134b), and stack capacitors are formed to electrically connect with the capacitor buried surface straps. A semiconductor device is also provided.
Abstract:
A dynamic random access memory (DRAM) includes a delay lock loop (DLL), a clock tree, an off-chip driver (OCD), a phase detector (PD) and a filter. The DLL receives a reference clock and updates a delay line, and then outputs a calibrated clock via the clock tree; the PD receives the calibrated clock via the clock tree and detects a phase difference between the calibrated clock and the reference clock; and the filter activates the DLL to update the delay line according the phase difference, wherein when a READ command is received, the filter increases the number of activations for the DLL to update the delay line, thereby shortening the access time of the DRAM.
Abstract:
A memory cell (100) having a first switch device (Tr1), a second switch device (Tr2) and a capacitor (C) is disclosed. The first switch device (Tr1) has a control terminal coupled to and controlled by a select line (SL), a first terminal coupled to a bit line (BL), and a second terminal. The second switch device (Tr2) has a first terminal coupled to the second terminal of the first switch device (Tr1), a control terminal coupled to and controlled by a word line (WL), and a second terminal. The capacitor (C) has a first terminal coupled to the second terminal of the second switch device (Tr2) and a second terminal coupled to a predetermined voltage level, wherein data is read from the capacitor (C) or written to the capacitor (C) via the bit line (BL).
Abstract:
A memory cell (100) having a first switch device (Tr1), a second switch device (Tr2) and a capacitor (C) is disclosed. The first switch device (Tr1) has a control terminal coupled to and controlled by a select line (SL), a first terminal coupled to a bit line (BL), and a second terminal. The second switch device (Tr2) has a first terminal coupled to the second terminal of the first switch device (Tr1), a control terminal coupled to and controlled by a word line (WL), and a second terminal. The capacitor (C) has a first terminal coupled to the second terminal of the second switch device (Tr2) and a second terminal coupled to a predetermined voltage level, wherein data is read from the capacitor (C) or written to the capacitor (C) via the bit line (BL).
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 for forming a semiconductor device is provided. The method comprises providing a substrate (100) with recessed gates (122) 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 (134a,b) of conductive material are formed in spaces between the spacers. The substrate, the spacers and the buried portions are patterned to form parallel shallow trenches for defining buried bit line contacts and capacitor buried surface straps. A layer of dielectric material is formed in the shallow trenches. Word lines (140) are formed across the recessed gates. Bit lines (150) are formed to electrically connect the buried bit line contacts (134a) without crossing the capacitor buried surface straps (134b), and stack capacitors are formed to electrically connect with the capacitor buried surface straps. A semiconductor device is also provided.
Abstract:
Method for forming a semiconductor memory device with a recessed gate. A substrate (208), having a plurality of deep trench capacitors (206) therein, is provided wherein upper portions of the deep trench capacitor devices are revealed. Spacers (226) on sidewalls of the upper portions of the deep trench capacitors are formed to form a predetermined region surrounded by the deep trench capacitor devices. The predetermined region of the substrate is etched using the spacers and the upper portions of the deep trench capacitors serve as a mask to form a recess (228), and a recessed gate (230,232) is formed in the recess.
Abstract:
A memory apparatus (100) and an operating method thereof are provided. The memory apparatus (100) includes a memory (110), a temperature sensor (120) and a control circuit (130). The temperature sensor (120) senses a temperature (TC) of the memory (110) and generating a temperature sensing signal (ST). The control circuit (130) is coupled to the memory (110) and the temperature sensor (120). The control circuit (130) performs access operation on the memory (110) and changes a frequency of the access operation with reference of a delay curve according to the temperature sensing signal (ST).