Abstract:
PROBLEM TO BE SOLVED: To manufacture a cap self-aligned on a gate conductor, and realize a two actional function for selectively applying P doping and N doping to the gate conductor. SOLUTION: A selected number of gate structures having self-aligned insulating layers 2 and 4 are doped by a first conductive type dopant through at least one sidewall of the gate structure. Thus, one gate structure is doped with the first conductive dopant, and another gate structure is doped with a second and different conductive dopant in this gate structural array. Therefore, a two actional function can be given.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a semiconductor and a device structure which suppress the latch-up in a bulk CMOS device. SOLUTION: The method includes a step of forming a trench in a semiconductor material of a substrate, while the trench has a first side wall disposed between a pair of doped wells demarcated in the semiconductor material of the substrate. The method further includes a step of forming an etching mask in the trench to mask partially the basal surface of the trench, and successively a step of removing the semiconductor material of the substrate exposing in the basal surface which has been partially masked and demarcating a second side wall which deepens the trench and has been narrowed. A dielectric material is filled in the deepened trench to demarcate trench separation regions of devices constructed in the doped wells. The dielectric material filled in the extended part of the deepened trench improves the suppression of the latch-up. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve a leakage current characteristic at or below the threshold of a trench discrete type FET element. SOLUTION: A slot in a vertical direction is formed in an stacked structure 14 adhered to a silicon substrate 10 covered with an oxide 12, and thereafter a spacer is formed on the sidewall of the slot. Then, a trench is formed in the substrate 10 by etching. A horizontal ledge appears adjacent to the trench, on the exposed surface of the substrate covered with the oxide by removal of the spacer. The conduction of an end in the element is suppressed by injecting a proper impurity into this ledge. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a switched body SOI CMOS circuit which is provided with an FET element for increasing a FET element threshold voltage. SOLUTION: A circuit having an SOI element is connected with a body bias voltage, via a switch for selectively connecting a body bias voltage signal with an SOI element body. An NMOS or PMOS SOI element is used as the switched body SOI element. An FET is used as a switch. A gate terminal of the SOI element is connected with an FET element. A gate of the SOI element controls the FET switch connection of the body bias voltage signal to the SOI element, and adjusts a threshold value voltage of the SOI element. A logic circuit including the SOI element and a fabrication process for the SOI element are similarly disclosed. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To obtain a small trench capacitor having sufficiently low parasitic leakage. SOLUTION: A transistor, which includes a gate and first and second diffused regions are provided. A trench capacitor in a substrate electrically connects a dielectric color part 168 at the upper-side part of a trench, a diffused region embedded in a substrate surrounding the lower part of the trench capacitor, a transitor and the capacitor. A node diffused region is included on a collar part. A third diffused region 269 is provided in a substrate neighboring the color part. In order to decrease the leakage, an adequate concentration of doping agent for enhancing the threshold voltage of the gate of a parasitic transistor, which is formed of the color part, the embedded diffused region and node diffusion, is provided.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved manufacturing method of an integrated circuit which is made by incorporating both a FinFET and a thick-body device into a single chip. SOLUTION: This manufacturing method of a microelectronic circuit which is made by incorporating both a fin-type field-effect transistor (FinFET) 1801 and a thick-body device 1802 into a single chip can attain an efficiency higher than that of the conventional methods by utilizing common masks and processes. Reduction in the numbers of masks and processes is achieved by utilizing common masks and processes together with several reduction strategies. For example, a structure which usually accompanies a FinFET is formed on a side surface of a thick silicon mesa. A bulk of the silicon mesa is doped to connect to a body contact formed on the opposite side surface of the mesa. This invention also includes the FinFET, thick-body device, and a chip manufactured by the methods associated with the invention. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor equipped having a dielectric layer of two-dimensional thickness, and to provide a method of manufacturing the same. SOLUTION: This manufacturing method comprises a first process of forming a mask with a through-hole 20 equipped with a side wall 21 on a structure (a), a second process of implanting suppression chemical seeds 24 into the structure through the through-hole 20 so as to form a suppression region 26 in the structure (b), and a third process of enabling a dielectric layer 28 to grow on the structure in the through-hole 20. Here, the suppression region 26 restrains the dielectric layer 28 partially from growing. By this setup, a self-aligned MOSFET or an anti-fuse device having a low overlap capacitance and a low gate induction drain leakage (i.e., low electric field) can be formed.
Abstract:
PROBLEM TO BE SOLVED: To provide efficient heat radiation which is related to an SOI structure, by forming a semiconductor device located beneath an embedded insulation layer, which is in turn electrically connected to an electrical structure body formed on the SOI structure. SOLUTION: The SOI structure is formed on a bulk semiconductor substrate. A trench, whose one end interfaces with the bulk semiconductor substrate is formed penetrating through the SOI layer. A semiconductor device, comprising a P diffusion region and N diffusion region, is formed on the bulk semiconductor substrate. A conductive plug, which self-matching with the P diffusion region and N diffusion region, while electrically contacting them, is formed in the trench. The semiconductor device formed in the bulk semiconductor substrate can contain an electrostatic discharge(ESD) device. The bulk semiconductor substrate functions as a medium for efficiently radiating heat generated by the (ESD) device, since its thermal conductivity is high.
Abstract:
PROBLEM TO BE SOLVED: To provide an anti-fuse structure which can program at a low voltage and current, uses only in an extremely small chip base, and can be formed in a gap between parts which are disposed at intervals of a least lithographic feature size. SOLUTION: An anti-fuse structure is formed on an SOI substrate in combination with a capacitor-like structure which reaches support layer or in the support layer by etching a contact which penetrates an insulator and reaches the support semiconductor layer. This anti-fuse can be programmed by selecting a position forming a conductor or damaging a dielectric of the capacitor-like structure. It is possible to restrict the damages to a desirable position by use of an insulation collar enclosing the conductor or a part of the capacitor-like structure. Thermal influences due to a programming current are isolated into the interior of a bulk silicon layer, whereby a programming during a normal operation of a device is enabled.
Abstract:
PROBLEM TO BE SOLVED: To provide a dual work function gate conductor having a self-aligned insulating cap, and a method for forming the dual work function gate conductor. SOLUTION: Two diffusion regions 36 are formed on a substrate 20, and gate stacks 33 and 34 are formed on the substrate 20 between these regions 36. The stacks 33 and 34 have a gate insulating layer 24, and polysilicon layers 26 and 26a on the layer 24, respectively. The layers 26 and 26a are n-type doped and remain intrinsic. A barrier layer 28 is formed on each of the layers 26 and 26a. A dopant source 30 is formed on the layer 28 for both stacks 33 and 34. The layer 28 has a p-type dopant. The stacks 33 and 34 are covered with an insulating cap 32 so that diffusion contacts can be formed on the gates in a borderless manner. When to start activating the source 30 for doping the layers 26 and 26a can be postponed until the desired timing.