Abstract:
PROBLEM TO BE SOLVED: To obtain an active FET body device capable of balancing high-speed electric charges, decreasing off-current, and increasing on-current. SOLUTION: This embodiment comprises a silicon substrate 2, a silicon dioxide layer 3, a monocrystal silicon layer 4, a silicon dioxide layer 5, a spacer 13 of N+ doped polysilicon, a conformal layer 15 of a conductive diffusion preventing substance, a metal silicide layer 16, a CVD silicon dioxide layer 17, an insulator spacer 18, a silicon oxide layer 19, and a polysilicon 21. In an off-state, a gate contact with a body holds the body at a low word line level. In this state, a threshold takes a larger value. In addition to a voltage added to the N+ part 13 of a gate conductor, a potential from the body to a source rises. As a result, if the device is turned on, Vt lowers. By the effects of a dynamic Vt fall accompanied by a low off-current, this embodiment is suitable for a device using a very low voltage.
Abstract:
PROBLEM TO BE SOLVED: To improve the control of thickness of an insulator layer on a fuse structure, by a method wherein a dielectric structure is positioned on a conduction level, and electric connection is performed at a selected position of the conduction level through the dielectric structure. SOLUTION: On a semiconductor substrate 10 an electric conduction level 1 is formed by using conductive material selected out of aluminum, copper, aluminum copper alloy, and doped polysilicon having metal type conductivity. A dielectric etching stop material layer 2 is stuck on the upper surface of the electric conduction level 1. Electric connection is performed to a selected position of the electric conduction level 1 through the dielectric etching stop material layer 2, and a conductive fuse 21 is constituted. As a result control of the thickness of an insulator layer on the fuse structure containing a self-aligned isolation cap can be improved.
Abstract:
PROBLEM TO BE SOLVED: To reduce remarkably the distributed series resistance of trench electrodes, by manufacturing trench capacitors using a method of forming heat- resistant metallic salicide materials on the trench regions having low trench capacitors. SOLUTION: A narrow upper region 16a and a wide lower region 16b are filled with ploysilicon layers 26 and the polysilicon layers 26 are planarized. Next, the polysilicon layers 26 are recessed, then conformal heat-resistant metallic layers 30 are adhered. After that, the salicide is formed at the interface between the heat-resistant metal in the region 16b and the polysilicon by annealing. As a result, a heat-resistant metallic salicide layer 32 is formed in the wide lower trench region 16b. It is preferable that the heat-resistant metallic salicide layer is not formed in the narrow upper trench region 16b. Next, the heat-resistant metallic layer 30 remained in the upper layer 16a is removed. Then, the additional polysilicon is filled in the trench. After that, the capacitor structure is planarized.
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 an improved damascene process for forming an interconnect to a conductive stud. SOLUTION: An electrical connection to a stud is made by filling a conductive stud material in a contact hole formed in a dielectric material layer 7, patterning the conductive stud material, removing a shallow part of the dielectric material layer surrounding the conductive stud material, depositing a second dielectric material layer 9, forming a trench in the second dielectric material layer in an upper region of the conductive stud, and patterning a conductive material in the trench.
Abstract:
PROBLEM TO BE SOLVED: To respond effectively and readily to contradictory requests chip regions by separating a first region from a second region by means of an insulation region. SOLUTION: A substrate 101 comprises at least a part of first and second regions 110, 130. An insulation region 150 is a shallow trench insulator(STI) comprising a dielectric material, such as oxide. The second region is an array region of a DRAMIC. An insulation region such as an STI is provided for separating a trench capacitor, for example. A region is provided by a well of dopant for a device to be formed next. Various layers forming a gate stack of a device are formed on the surface of a substrate. The process includes the formation of an oxide layer 160 through thermal oxidation, for example. The oxide layer 160 is used as a gate oxide. The gate layer 161 is deposited on a gate oxide. The gate layer 161 is a composite layer such as polycide.
Abstract:
Manufacturing a semiconductor structure (5) including: forming a seed material (25) on a sidewall of a mandrel (20a, 20b); forming a graphene field effect transistor (FET) (30) on the seed material (25); and removing the seed material (25).
Abstract:
A system and method for eliminating undercut when forming a C4 solder bump for BLM (Ball Limiting Metallurgy) and improving the C4 pitch. In the process, a barrier layer metal stack (20') is deposited above a metal pad layer (19'). A top layer (22') of the barrier layer metals (e.g., Cu) is patterned by CMP with a bottom conductive layer (21 ') of the barrier metal stack (20') removed by etching. The diffusion barrier (40) and C4 solder bump (50) may be formed by electroless plating, in one embodiment, using a maskless technique, or by an electroplating techniques using a patterned mask. This allows the pitch of the C4 solder bumps to be reduced.
Abstract:
In a first aspect, a method comprises depositing a first metal containing layer (16) into a trench structure, which contacts a metalized area (12) of a semiconductor structure (10). The method further includes patterning at least one opening in a resist to the first metal containing layer (16). The opening should be in alignment with the trench structure. At least a pad metal containing layer (20) is formed within the at least one opening (preferably by electroplating processes). The resist (18) and the first metal layer (16) underlying the resist (18) are then etched (with the second metal layer (20) acting as a mask, in embodiments). The method includes flowing solder material (22) within the trench and on pad metal containing layer (20) after the etching process. The structure is a controlled collapse chip connection (C4) structure comprising at least one electroplated metal layer formed in a resist pattern to form at least one ball limiting metallurgical layer. The structure further includes an underlying metal layer devoid of undercuts.
Abstract:
A method and structure for a MIM capacitor, the structure including: an electronic device, comprising: an interievel dielectric layer formed on a semiconductor substrate; a copper bottom electrode formed in the interievel dielectric layer, atop surface of the bottom electrode co-planer with a top surface of the interievel dielectric layer; a conductive diffusion barrier in direct contact with the top surface of the bottom electrode; a MIM dielectric in direct contact with a top surface of the conductive diffusion barrier; and a top electrode in direct contact with a top surface of the MIM dielectric. The conductive diffusion barrier may be recessed into the copper bottom electrode or an additional recessed conductive diffusion barrier provided. Compatible resistor and alignment mark structures are also disclosed.