Abstract:
One aspect of the present invention relates to a method of fabricating a polymer memory device in a via. The method involves providing a semiconductor substrate having at least one metal-containing layer thereon, forming at least one copper contact in the metal-containing layer, forming at least one dielectric layer over the copper contact, forming at least one via in the dielectric layer to expose at least a portion of the copper contact, forming a polymer material in a lower portion of the via, and forming a top electrode material layer in an upper portion of the via.
Abstract:
The present invention involves a method for fabricating interconnecting lines and vias. According to the invention, copper is grown within the openings in a patterned coating. The patterned coating can be a resist coating or a dielectric coating. Either type of coating can be formed over a copper seed layer, whereby the seed layer is exposed within the pattern gaps. The copper seed layer can also be provided within the pattern gaps after patterning. Copper features (18) are grown within the pattern gaps by plating. Where the patterned coating is a resist, the resist is stripped leaving the copper features (18) in the inverse pattern image. The cooper features can be coated with a diffusion barrier layer and a dielectric (19). The dielectric (19) is polished to leave the dielectric filling the spaces between copper features (18). The invention provides copper lines and vias without the need for a dielectric or metal etching step. Another benefit of the invention is that lines widths can be increased by trimming the patterned coating prior to growing the copper features (18).
Abstract:
An interconnect structure and method of forming the same in which a diffusion barrier/etch stop layer (22) is deposited over a conductive layer (20). An organic low k dielectric material (24) is deposited over the diffusion barrier/etch stop layer (22) to form a first dielectric layer (24). The first dielectric layer (24) is etched to form a slot via (50) in the first dielectric layer (24). An inorganic low k dielectric material (30) is deposited within the slot via (50) and over the first dielectric layer (24) to form a second dielectric layer (30) over the slot via (50) and the first dielectric layer (24). The re-filled via (50) is simultaneously etched with the second dielectric layer (30) in which a trench (38) is formed. The trench (38) extends in a direction that is normal to the length of the slot via (50). The entire width of the trench (38) is directly over the via (36). The re-opened via and the trench (38) are filled with a conductive material (40). In other embodiment, the first dielectric layer (24) comprises an inorganic low k dielectric layer and the second dielectric layer (30) comprises an inorganic low k dielectric layer.
Abstract:
A method of making organic memory cells (104) made of two electrodes (106, 108) with a controllably conductive media (110) between the two electrodes (106, 108) is disclosed. The controllably conductive media (110) contains an organic semiconductor layer (112) and passive layer (114). The organic semiconductor layer (112) is formed using spin-on techniques with the assistance of certain solvents.
Abstract:
The present invention provides systems and methods that facilitate performing fabrication process. Critical parameters are valued collectively as a quality matrix, which weights respective parameters according to their importance to one or more design goals. The critical parameters are weighted by coefficients according to information such as, product design, simulation, test results, yield data, electrical data and the like. The invention then can develop a quality index which is a composite "score" of the current fabrication process. A control system can then do comparisons of the quality index with design specifications in order to determine if the current fabrication process is acceptable. If the process is unacceptable, test parameters can be modified for ongoing processes and the process can be re- worked and re-performed for completed processes. As such, respective layers of a device can be customized for different specifications and quality index depending on product designs and yields.
Abstract:
Disclosed are methods of dual damascene processing, involving forming a plurality of via openings in the insulation structure containing a single layer of a dielectric material; and simultaneously (i) forming a plurality of trenches in the insulation structure, each trench positioned along the substantially straight line of a group of via openings, and (ii) monitoring the formation of trenches using a scatterometry system to determine trench depth, and terminating forming the trenches when a desired trench depth is attained.
Abstract:
A system for characterizing a chemical mechanical polishing process is provided. The system includes a wafer (610) that has a metal, polysilicon, and/or dielectric layer and/or substrate and electrical resistance member(s) and/or electrical resistance entities (110) located in and/or on the metal, polysilicon and/or dielectric layer and/or substrate. The system also includes a electrical resistance monitoring system (630) that can read the wafer (610) electrical resistance(s) from the electrical resistance member(s) and/or electrical resistance entities and that can determine wafer stress(es) based upon the electrical resistance(s) to characterize the chemical mechanical polishing process. Such characterization includes producing information concerning relationships between wafer electrical resistance(s) and polishing rate, polishing uniformity and introduction of defects during polishing. Such relationships are correlated with wafer electrical resistance(s) and polishing uniformity and introduction of defects during polishing. Such relationships ips are corrlated with wafer electrical resistance(s) (e.g., wafer stress(es) as related to parameters like polishing time, pressure, speed, slurry properties and wafer/metal layer properties.
Abstract:
A system (1000) for characterizing an etch process, such as forming a dual damascene structure, via scatterometry based real time imaging is provided. The system (1000) includes one or more light sources (1020), each light source directing light to one or more features and/or gratings (1015) on a wafer (1010). Light reflected from the features and/or gratings (1015) is collected by a measuring system (1070), which processes the collected light. The collected light is indicative of the etch results achieved at respective portions of the wafer (1010). The measuring system (1070) provides etching related data to a processor (1040) that determines the desirability of the etching of the respective portions of the wafer (1010). The system (1000) also includes one or more etching devices (1030), each such device corresponding to a portion of the wafer (1010) and providing for the etching thereof. The processor (1040) produces a real time etch image to characterize the progress of the etching and, in one example, produces suggested adaptations to the etch process.
Abstract:
The present invention is directed to a method (58) for detecting asymmetry in the profile of a feature (82) formed on a wafer during the process of semiconductor fabrication. The method (58) encompasses directing a beam of light or radiation at a feature (66) and detecting a reflected beam associated therewith (68). Data associated with the reflected beam is correlated with data associated with known feature profile s(19) to ascertain profile characteristics associated with the feature of interest (192). Using the profile characteristics, an asymmetry of the feature is determined (192) which is then used to generate feedback or feedforward process control data (200) to compensate for or correct such asymmetry in subsequent processing.
Abstract:
The invention provides systems and processes that form the inverse (photographic negative) of a patterned first coating. The patterned first coating is usually provided by a resist. After the first coating is removed, where appropriate, to expose the patterned first coating. The patterned first coating is subsequently removed, leaving the second coating material in the form of a pattern that is the inverse pattern of the first coating pattern. The process may be repeated with a third coating material to reproduce the pattern of the first coating in a different material. Prior to applying the second coating, the patterned first coating may be trimmed by etching, thereby reducing the feature size and producing sublithographic features. In addition to providing sublithographic features, the invention gives a simple, efficient, and high fidelity method of obtaining inverse coating patterns.