Abstract:
A method for fabricating a heating a element includes modifying the surface state of a substrate in order to obtain at least one smooth area of low roughness and at least one rough area having a higher roughness; applying a highly electrically conductive material to these various areas; and connecting smooth area(s) of the conductive material to an electrical power source.
Abstract:
A wired circuit board has a metal supporting board, a metal foil formed on the metal supporting board to have a thickness of less than 2.0 μm, a first insulating layer formed on the metal supporting board to cover the metal foil, and a conductive pattern formed on the first insulating layer.
Abstract:
An optical waveguide film includes: an optical waveguide film main body including an optical waveguide core through which light travels and a cladding portion that surrounds the optical waveguide core and has a lower refractive index than that of the optical waveguide core; an electric wiring portion including silver or a silver alloy and formed on at least a part of a principal surface of the optical waveguide film main body; and a protective layer including a titanium layer or a titanium alloy layer and disposed to cover the electric wiring portion.
Abstract:
A wired circuit board has a metal supporting board, a metal foil formed on the metal supporting board to have a thickness of less than 2.0 μm, a first insulating layer formed on the metal supporting board to cover the metal foil, and a conductive pattern formed on the first insulating layer.
Abstract:
According to one embodiment, an electronic apparatus includes a casing and a flexible printed wiring board contained in the casing. The flexible printed wiring board includes an insulating layer, which is sheet-like, a signal line formed on a first surface of the insulating layer, and a ground layer, which is conductive and formed on a second surface of the insulating layer opposite to the first surface. The ground layer includes a mesh portion having a mesh structure and a thin film portion which fills cells in the mesh structure of the mesh portion.
Abstract:
This process for producing a resist pattern includes: the step of laminating (a) a support having an upper surface on which copper exists, (b) an inorganic substance layer consisting of an inorganic substance supplied from an inorganic substance source, and (c) a photoresist layer consisting of a chemically amplified type positive photoresist composition, to obtain a photoresist laminate, the step of selectively irradiating active light or radioactive rays to said photoresist laminate, and the step of developing said (c) photoresist layer together with said (b) inorganic substance layer to form a resist pattern.
Abstract:
A method for delineating a metallization pattern in a layer of sputtered aluminum or sputtered copper using a broad spectrum high intensity light source. The metal is deposited on a polymeric substrate by sputtering, so that it has a porous nanostructure. An opaque mask that is a positive representation of the desired metallization pattern is then situated over the metallization layer, exposing those portions of the metallization layer intended to be removed. The masked metallization layer is then exposed to a rapid burst of high intensity visible light from an arc source sufficient to cause complete removal of the exposed portions of the metallization layer, exposing the underlying substrate and creating the delineated pattern.
Abstract:
The invention concerns a process for the production of a conductor track structure on a flexible plastic film, a conductor track structure produced in accordance therewith, wherein the conductor track structure is connected to the plastic film by means of an adhesive layer hardened by irradiation, and is formed from an electrically conducting thin film layer in pattern form, which is galvanically reinforced with at least one metal layer, as well as an electronic component or an electronic circuit having such a conductor track structure.
Abstract:
An apparatus and method for manufacturing a highly efficient flexible thin metal film-laminated strip by improves adhesiveness between a polyimide strip and a thin metal film, and removes stress from thin films laminated through magnetron sputtering, which is a dry deposition process. The stress-free flexible circuit board manufacturing method includes the steps of: a) depositing a seed layer on the substrate using the magnetron deposition source; b) depositing a compressive thin film using the single magnetron deposition source arranged next to the magnetron deposition source; c) depositing tensile thin film using the dual magnetron deposition source arranged next to the single magnetron deposition source; and d) repeating the steps b) and c) so as to sequentially and alternately deposit compressive thin films and tensile thin films thereby obtaining a thick film with a desired thickness.
Abstract:
There is described a printed circuit board with a thermally trimmable component embedded therein. A layer of refractory insulating material is provided to provide mechanical support and chemical passivation for the thermally trimmable component. The component is trimmed by applying a sequence of heat pulses the a heating element, which could be the component itself or a separate element. A cavity may be burned in the substrate to provide thermal isolation for the thermally trimmable component.