Abstract:
An electronic device includes a substrate and an electronic component. The substrate has a metallized trace. The metallized trace has a metallized layer and an insulation layer. The metallized layer has a high melting point metal component and a low melting point metal component, the high melting point metal component and the low melting point metal component being diffusion bonded together. The insulation layer is formed simultaneously with the metallized layer to cover an outer surface of the metallized layer. The electronic component is electrically connected to the metallized layer.
Abstract:
PROBLEM TO BE SOLVED: To provide an original plate of a metal printed circuit board which has superior heat dissipation characteristics and electric characteristics by forming an insulating layer and a thick electric conductive layer of high density on a metal board by a sputtering method for physical vapor deposition, and to provide a method of manufacturing the original plate. SOLUTION: The method of manufacturing the original plate includes a step of forming the insulating layer on the metal board by the sputtering method for physical vapor deposition, a step of vapor-depositing a first thin film made of a conductive metal and having compressive residual stress on the insulating layer by the sputtering method, a step of vapor-depositing a second thin film made of a conductive metal and having tensile residual stress on the first thin film by the sputtering method, and a step of repeating the steps of vapor-depositing the first thin film and second thin film to vapor-deposit the electric conductive layer of a thick film such that the total residual stress is controlled within a preset range. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To surely maintain a state of electric conduction to an electronic component to be mounted by effectively absorbing stress generated owing to a difference between a coefficient of thermal expansion of the electronic component to be mounted and that of a wiring board, and to contribute to cost reduction by substantially eliminating curvature of the wiring board after mounting. SOLUTION: The wiring board 10 has a cylindrical external connection terminal 20 to engage an electrode terminal 31 of the electronic component 30 to be mounted. The external connection terminal 20 has its part electrically connected to a pad portion 12P formed on an electronic component mounting surface side of the wiring board 10, and is curved in such a shape that when the electrode terminal 31 of the electronic component 30 is inserted, an outer peripheral surface of the electrode terminal comes into tight contact with an inner peripheral surface of its center portion. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of forming a wiring by which a productivity of the wiring can be improved while making it possible to thickly form a thickness of a detailed wiring in the method of forming the wiring using an electrolytic plating method. SOLUTION: The method of forming the wiring comprises the steps of: forming a resist film 19 for lift-off on an insulating layer 12 corresponding to a wiring formation region A, so as to expose the insulating layer 12 corresponding to a formation position of a first seed layer 14; forming a metallic film 21; forming first and second seed layers 14, 22 by removing the resist film 19 for lift-off; carrying out a deposit growth of a conductive metal 15 on the first seed layer 14 by the electrolytic plating method; and forming a wiring 13 consisting of the first seed layer 14 and the conductive metal 15 by removing the second seed layer 22. COPYRIGHT: (C)2007,JPO&INPIT