Abstract:
A semiconductor device capable of suppressing diffusion of copper at an interface between a copper wire and a cap film to enhance an electromigration resistance to ensure reliability of the copper wire, and a manufacturing method thereof are provided. The semiconductor device according to the present invention comprises an insulating film (12) formed on a substrate (11), a concave portion (13) (for example, a groove) formed in the insulating film, a conductive layer (15) embedded in the concave portion through a barrier layer (14), and a cobalt tungsten phosphorus coating (16) to connect with the barrier layer on the side of the conductive layer and to coat the conductive layer on the opening side of the concave portion.
Abstract:
An electrolytic polishing apparatus for electrolytic-polishing a conductive film subject to formed on a substrate including a resistance measuring unit for measuring the resistance of the film. The electrolytic polishing apparatus may also include a termination point detecting portion for detecting a termination point of polishing by reading a variation of the resistance value measured by the resistance measuring unit, or a polishing control portion for terminating electrolytic polishing on the basis of the termination point of polishing detected by the termination point detecting portion.
Abstract:
The present invention is to provide a method for fabricating semiconductor devices capable of eliminating a height difference on a base member caused by a residual plating seed layer remained in a portion where an electrode comes into contact and is thus prevented from contacting with an electrolytic polishing fluid, where such height difference has been a problem in introducing the electrolytic polishing process into wafer process. The method comprises the steps of forming a plating seed layer on the base member; forming by the plating process a plated film on the plating seed layer in an area excluding the outer peripheral portion of the base member; polishing the plated film together with the plating seed layer by the electrolytic polishing process; and selectively removing the plating seed layer remaining on the outer peripheral portion of the base member.
Abstract:
Disclosed is a magnetron sputtering system enabling formation of a film of a ferroelectric substance by suppressing occurrence of a magnetic field due to an eddy current. The magnetron sputtering system includes a flat target; magnetic field applying means (magnets), provided in the vicinity of a back surface of the target, for applying a magnetic field to a front surface of the target; and magnetic field rotating means (motor) for rotating the magnetic field applying means so as to rotate the magnetic field applied to the front surface of the target. The magnetic field rotating means is provided with rotational speed varying means (speed controller) for varying the rotational speed of the magnetic field applied by the magnetic field rotating means.
Abstract:
An underlying Al alloy wiring 3 and an inter-layer insulation film 4 are formed sequentially on a semiconductor substrate 1 via an inter-layer insulation film 2. An inter-layer insulation film 5 highly hygroscopic and containing much moisture is made and etched back to flush depressions by the underlying Al alloy wiring 3. After an inter-layer insulation film 6 is made, a contact-hole C is made in the inter-layer insulation films 6 and 4. After that, prior to making a TiN/Ti film 7, gases are removed from the inter-layer insulation films 4 through 6 by annealing. The TiN/Ti film 7 is made as thick as 80 nm. In an alternative version, after the inter-layer insulation film is etched back, annealing is done to remove gases especially from the inter-layer insulation film 5. In another alternative version, a protective film 9 is made on the side wall of the contact-hole C, or the surface of the inter-layer insulation films 6 and 4 having formed the contact-hole or the surface of the inter-layer insulation film 5, is nitrified, to prevent degassing of the inter-layer insulation films 4 through 6.
Abstract:
Disclosed herein is a high-sensitivity differential refractometer which is characterized by having a light source disposed outside a housing, a reflecting mirror attached at the end portion thereof to a reflecting mirror-supporting plate connected with the end of a movable plate, said movable plate being so constructed as to rotate around a vertical axis and permit free change of the angle formed between said reflecting mirror-supporting plate and the movable plate, a twisting member disposed inside a lead-in tube and said lead-in tube fastened to a removable case and built in a metallic block inside the housing.
Abstract:
A method for producing an amylose-containing rayon fiber, comprising the steps of: mixing an aqueous alkaline solution of amylose with viscose to obtain a mixed liquid, spinning the mixed liquid to obtain an amylose-containing rayon fiber, and bringing the amylose-containing rayon fiber into contact with iodine or polyiodide ions, thereby allowing an amylose in the amylose-containing rayon fiber to make a clathrate including the iodine or polyiodide ions, wherein the amylose is an enzymatically synthesized amylose having a weight average molecular weight of 3×104 or more and 2×105 or less. A method for collecting iodine from brackish water with high efficiency utilizing the amylase-containing rayon fibers.
Abstract:
A method for producing an amylose-containing rayon fiber, comprising the steps of: mixing an aqueous alkaline solution of amylose with viscose to obtain a mixed liquid, spinning the mixed liquid to obtain an amylose-containing rayon fiber, and bringing the amylose-containing rayon fiber into contact with iodine or polyiodide ions, thereby allowing an amylose in the amylose-containing rayon fiber to make a clathrate including the iodine or polyiodide ions, wherein the amylose is an enzymatically synthesized amylose having a weight average molecular weight of 3×104 or more and 2×105 or less. A method for collecting iodine from brackish water with high efficiency utilizing the amylase-containing rayon fibers.
Abstract:
A manufacturing method for forming a dual damascene structure in which the effective permittivity of an inter-layer insulating film is lowered without an etching mask for forming a contact hole, which is otherwise formed in the inter-layer insulating film. The manufacturing method comprises the step of forming an inorganic film to serve as an etching mask, on the inter-layer insulating film; the step of forming a first opening pattern for forming a wiring groove, in an upper part of the inorganic film; and the step of forming a second opening pattern for forming a contact hole, so as to coincide with the first opening pattern at least partially. Further, the contact hole is formed in the inter-layer insulating film by employing an etching mask made of the inorganic film, the inorganic film is etched into a state where only a third opening pattern obtained by transferring the first opening pattern is formed, and a wiring groove is formed in the inter-layer insulating film by employing the resulting inorganic film as the etching mask.
Abstract:
A method of forming wirings which comprises forming a film of a silicon-containing metal layer at a high temperature on an underlying metals, thereby forming a silicon alloy layer comprising the underlying metal and the silicon-containing metal during film formation. In a case of forming wirings by a silicon-containing metal layer occurrence of Si nodules can be eliminated to obtain wirings of high reliability.