Abstract:
PROBLEM TO BE SOLVED: To obtain a new barrier layer which fulfills all standards by forming an alpha phase tungsten barrier layer in a trench or a via, having a mutual bonding structure by using a chemical low temperature/low pressure air phase adhesion technology. SOLUTION: A dielectric 22 is formed on a semiconductor substrate 20 and a trench or a via having a mutual bonding structure is formed on the surface of the dielectric 22. An alpha phase tungsten barrier layer 24 is formed in the trench or the via through the use of chemical low temperature/low pressure air phase adhesion technology method and an arbitrarily selected metallic seed layer 26 is laminated and formed thereon. Additionally conductive material 28 is embedcred in the trench or the via and an alpha phase tungsten barrier layer 25, a dielectric 30 and an electrode 32 are successively formed thereon. In this case a barrier layer 36, made of such materials as alpha tungsten and so on which protects a contact of the conductor 28 with the dielectric 22, is formed.
Abstract:
PROBLEM TO BE SOLVED: To limit the forming quantity of an inter-metallic compound by sticking a wetting layer containing first metal which is brought into contact with an insulator to a recessed part, a uniform barrier layer on it, and a second metallic conduction layer on it at a temperature which is lower than that, at which the inter-metal compound is generated by means of diffusing first and second metals on the barrier layer. SOLUTION: Barrier layers 20 of nonreactive compounds are formed on wetting layers 18, where the metal of titanium(Ti) is evaporated by CVD on the sidewalls of the recessed parts 12 of an insulating layer 10 on the substrate 11 of a silicon water. The barrier layers 20 are formed of an arbitrary material, whose diffusion temperature of the constitution elements of the wetting layers 18 and the metallic layers, is higher than the reaction temperature of the constitution elements, and titanium nitride(TiN) is desirable. It is thicker than the sidewalls of the wetting layers 18 and is more uniform. Then, the recessed parts 12 are completely filled with the conduction layers a metal such as aluminum(Al). In the reaction between Ti of the wetting layers 18 and Al of the conduction layers 22, Ti and Al are unable to diffuse at a temperature lower than 430 deg.C, and they are brought into contact with each other and do not react.
Abstract:
PROBLEM TO BE SOLVED: To provide an interconnection with a damascene structure having an improved reliability, by using a liner for surrounding or sealing a conductor to give random crystal grain orientation to a conductive material. SOLUTION: A layer 137 is deposited on an insulating layer 130. A layer for lining the wall and the bottom of the contact opening functions as a base coat or liner for a conductive layer 138 to be subsequently deposited to fill the contact opening, and the degree of crystal grain orientation randomness of a material that fills the damascene structure is expanded. A parameter used for depositing a TiN layer is selected to expand the degree of base coat crystal grain orientation randomness and/or amorphous characteristics. The liner has an enough thickness to ensure the random crystal grain orientation of the conductive material to be subsequently deposited. Thus, the interconnection in an IC having the improved reliability can be obtained.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for radiation monitoring that obtains real time information concerning the amount of radiation. SOLUTION: A semiconductor device includes: a semiconductor substrate; a buried insulator layer disposed on the semiconductor substrate, the buried insulator layer configured to retain an amount of charge in a plurality of charge traps in response to a radiation exposure by the semiconductor device; a semiconductor layer disposed on the buried insulating layer; a second insulator layer disposed on the semiconductor layer; a gate conducting layer disposed on the second insulator layer; and one or more side contacts electrically connected to the semiconductor layer. The method for radiation monitoring includes: applying a backgate voltage to a radiation monitor, the radiation monitor comprising a field effect transistor (FET); exposing the radiation monitor to radiation; determining a change in a threshold voltage of the radiation monitor; and determining an amount of radiation exposure based on the change in threshold voltage. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve the electromigration resistance characteristic by depositing a Cu seed layer to a housing region and implanting ions of a impurity selected among C, O, Cl, S and N in the seed layer. SOLUTION: In a simple damascene, a dopant ion is implanted in a Cu-rich conductive layer 90 before planarizing, the dopant is selected among C, O, Cl, S and N, a silicon nitride etch-planarize stop layer 92, a barrier layer 94 and a Cu seed layer 96 are formed in trenches formed on a semiconductor wafer or the side walls and top faces of openings, the ion implanting in the Cu conductive layer 90 is made in the single damascene process after the planarize stop, and the dopant brings about a microstructure unique to a conductor contg. large crystal grains, thereby improving the electromigration resistance characteristic.
Abstract:
PROBLEM TO BE SOLVED: To obtain an interconnection part for an integrated circuit with improved electromigration characteristics. SOLUTION: An interconnection structure part includes titanium lower and upper layers 14 and 20, and the two titanium layers differ from each other in cleanliness. In order to improve electromigration, and to strongly obtain an intermediate layer 18 with texture, the titanium lower layer 14 is not relatively contaminated, and contains a contaminant of at most 5 wt.%. The intermediate layer 18 containing aluminum is formed between the titanium lower and upper layers 14 and 20. The titanium upper layer 20 is relatively more contaminated as compared with the titanium lower layer 14, contains a contaminant of more than 5 wt.%, and contributes to the maintenance of low area resistance.
Abstract:
A method of determining a stopping power of a design structure with respect to a traveling particle. The method includes (i) providing design information of the design structure comprising a back-end-of-line layer which includes N interconnect layers, N being a positive integer, (ii) dividing each interconnect layer of the N interconnect layers into multiple pixels, and (iii) determining a first path of the traveling particle in a first interconnect layer of the N interconnect layers, (iv) identifying M path pixels of the multiple pixels of the first interconnect layer on the first path of the traveling particle, M being a positive integer, and (v) determining a first loss energy lost by the traveling particle due to its completely passing through a first pixel of the M path pixels.
Abstract:
Grooves are formed in a CMP (12) pad by positioning the pad on a supporting surface with a working surface (22) of the pad in spaced relation opposite to a router bit (24) and at least one projecting stop member (33) adjacent to the router bit, an outer end portion of the bit projecting beyond the stop. When the bit is rotated, relative axial movement between the bit and the pad causes the outer end portion of the bit to cut an initial recess in the pad. Relative lateral movement between the rotating bit and the pad then forms a groove which extends laterally away from the recess and has a depth substantially the same as that of the recess. Different lateral movements between the bit and the pad are used to form a variety of groove patterns, the depths of which are precisely controlled by the stop member(s). The grooves may be formed in the polishing surface and/or the rear opposite surface of the pad and passages may be provided for interconnecting the rear grooves with the polishing surface or the front grooves. Grooves in the polishing surface may be provided with outlets through which a polishing slurry may flow while the polishing surface is in contact with a workpiece surface.
Abstract:
A polishing pad having a body comprising fibers embedded in a matrix polymer formed by a reaction of polymer precursors. The fibers define interstices, a nd the precursors fill these interstices substantially completely before completion of the reaction. The pad may include a thin layer of free fibers at its polishing surface. A segment of at least a portion of the free fibers ar e embedded in the adjacent body of the polymer and fibers. The fibers may be separate, or in the form of a woven or non-woven web.
Abstract:
A structure and a method for reduction of soft error rates in integrated circuits. The structure including: a semiconductor substrate; and a stack of one or more wiring levels stacked from a lowermost wiring level to an uppermost wiring level, the lowermost wiring level nearer the semiconductor substrate than the uppermost wiring level; and an alpha particle blocking layer on a top surface of the uppermost wiring level of the one or more wiring levels, the blocking layer comprising metal wires and a dielectric material, the blocking layer having a combination of a thickness of the blocking layer and a volume percent of metal wires in the blocking layer sufficient to stop a predetermined percentage of alpha particles of a selected energy or less striking the blocking layer from penetrating into the stack of one or more wiring levels or the substrate.