摘要:
In order to prevent a rise in resistance due to oxidation of copper wiring and diffusion of copper, a semiconductor device is provided which contains a wire protective film 1 covering the top of the copper wiring 2 formed in the insulation film and a barrier film surrounding the side and bottom of the copper wiring. The wire protective film and/or barrier film is formed with a cobalt alloy film containing (1) cobalt, (2) at least one of chromium, molybdenum, tungsten, rhenium, thallium and phosphorus, and (3) boron.
摘要:
When a wiring conductor is formed on a semiconductor substrate, a via-hole or a trench is formed by directly performing electroless plating on a barrier layer containing a very small depressed portion such as the via-hole or the trench in an insulator layer without using a dry metallized method or a substitutive plating method. The semiconductor device is provided with an insulator layer having a via-stud on a semiconductor substrate, the via-stud being formed in a via-hole through a barrier layer formed of an inorganic compound layer or a high melting point metal layer formed on an inner surface of the via-hole, the via-stud being made of the same metal as a metal composing the barrier layer. The semiconductor device can be obtained by forming the barrier layer on the inner surface of the via-hole in the semiconductor substrate, then treating the substrate with a treatment solution containing a complex forming agent, immersing the treated substrate into an electroless plating solution, bringing a member made of the same metal as a metal formed by the electroless plating in contact with the electroless plating solution, and electrically connecting the member to the barrier layer to perform electroless plating.
摘要:
A method for manufacturing printed circuit board by forming wiring pattern by chemical metal plating using a negative pattern made of a photosensitive resin composition layer as the plating resist, wherein the photosensitive resin comprises at least a linear high polymer composed of repeating units expressed by the following general formula (1); ##STR1## where, R.sub.1 is H, an alkyl group having 1-9 carbon atoms, an alkoxy group having 1-9 carbon atoms, and a carboxyalkyl group having 1-9 carbon atoms, R.sub.2 is an alkylene group having 1-9 carbon atoms, and n is the polymerized number of the repeating unit, and an organic compound expressed by the following general formula (2); ##STR2## where, R.sub.3 is H or an alkyl group having 1-6 carbon atoms, X is NH or S, and Z is N or C--Y, where Y is H, NH.sub.2, or SH.
摘要:
In an additive process for producing printed wiring boards, by using a developer comprising a chlorine-free organic solvent and an alkaline aqueous solution and as a resist material a copolymer of methacrylic acid and methyl methacrylate or the like, the production steps are simplified even if a substrate having a large area is used, and abolishment of chlorine-containing organic solvent as a developer becomes possible.
摘要:
A fine metal structure having its surface furnished with microprojections of high strength, high precision and large aspect ratio; and a process for producing the fine metal structure free of defects. There is provided a fine metal structure having its surface furnished with microprojections, characterized in that the microprojections have a minimum thickness or minimum diameter ranging from 10 nanometers to 10 micrometers and that the ratio between minimum thickness or minimum diameter (D) of microprojections and height of microprojections (H), H/D, is greater than 1. There is further provided a process for producing a fine metal structure, characterized by comprising providing a substrate having a fine rugged pattern on its surface, applying a molecular electroless plating catalyst to the surface, thereafter carrying out electroless plating to thereby form a metal layer having the rugged pattern filled, and detaching the metal layer from the substrate to thereby obtain a fine metal structure furnished with a surface having undergone reversal transfer of the above rugged pattern.
摘要:
An illuminating apparatus has a reduced number of mounting spots by soldering or the like to permit an increased yield rate and a reduced cost. The illuminating apparatus has light emitting diodes, lead frames, and a transparent sealer. N light emitting diodes, N sets of lead frames mounted with the N light emitting diodes, and one set or more of lead frames each not mounted with a light emitting diode are sealed by the transparent sealer for integration into a modular illuminating apparatus. Also provided are a method for fabricating the illuminating apparatus, and a display apparatus using the illuminating apparatus.
摘要:
A small-sized electronic circuit component comprising micro-wiring and a method for manufacturing the same are provided. The electronic circuit component is manufactured by a manufacturing method comprising the steps of forming a recessed portion which is to be a three-dimensional wiring in the surface of an insulating base material of the electronic circuit component comprising the wiring, forming a first metal layer which is to be an electroplated conductive layer on the surface of the insulating base material including the recessed portion, selectively forming a second metal layer which is to be the wiring only in the recessed portion which is to be the wiring, and removing the first metal layer formed on the surface other than in the recessed portion which is to be the wiring.
摘要:
There is provided a method for manufacturing a printed wiring board that allows molten scattered Cu and an overhang to be selectively removed while scarcely decreasing a thickness of wires, and an electrolytic etching solution suitably used in the method. In the method for manufacturing a printed wiring board in which a via that reaches from a surface copper layer to an inner-layer copper layer of a multilayer board in which copper layers and insulating layers are alternately layered is machined by means of a laser, a process of machining the via including steps of forming a laser absorbing layer on a surface of a copper layer disposed on the surface of the multilayer board, irradiating the laser, performing an electrolytic etching and removing the laser absorbing layer is carried out in this order.
摘要:
It is an object of the present invention to alleviate a work for removing an unnecessary metal layer when wiring and vias are formed on a substrate by electroplating.An additive is added to a plating solution to be used for electroplating. The additive has a plating reaction suppressing capability, but has a characteristic that the plating reaction suppressing capability is reduced as the plating reaction progresses. The additive has a capability for increasing a metal deposition overpotential and has a characteristic that the metal deposition overpotential is reduced as the reaction progresses. As a result, the metal can be deposited selectively in a trench and a via formed on the substrate. When a wiring and a via are formed on the substrate, the trench and the via having a predetermined surface roughness are formed on the substrate.
摘要:
It is an object of the present invention to provide a wiring board having high-density wiring with a controlled shape without masking by a resist film and a production method thereof. In the present invention, the production method of a wiring board having copper wiring on an insulating substrate includes the steps of forming a metal seed layer on the insulating substrate, the metal seed layer having a roughened shape in a portion on which the copper wiring or a bump is to be formed, and forming an electroplated film of copper or an alloy of copper through electroplating on the portion of the metal seed layer having the roughened shape. A substance for suppressing the plating reaction is added to a plating bath to provide an angle of 90 degrees or smaller between a surface of the insulating substrate and a side of the electroplated film.