Abstract:
It is an object of the present invention to provide a substrate for a flexible printed circuit board having high long-term heat resistance and oil resistance, a method for manufacturing the same, and a flexible printed circuit board using the same. A flexible printed circuit board according to the present invention includes an insulating flexible base film, a conductive pattern made of copper disposed on a surface side of the base film, and a protective film disposed on a surface side of the conductive pattern with an adhesive layer therebetween. The flexible printed circuit board further includes a shielding layer disposed on a surface of the conductive pattern, the shielding layer preventing leakage of copper or permeation of components reactive with copper. The main component of the shielding layer may be nickel (Ni), tin (Sn), or aluminum (Al). The shielding layer may be formed by a plating on the surface of the conductive pattern. The average thickness of the shielding layer may be 0.01 to 6.0 µm.
Abstract:
An arrangement for potential equalization in a control device (1) for a motor vehicle comprises at least one electrical component (6) on a circuit carrier (4), a carrier structure (2) on which the circuit carrier (4) is arranged, and at least one contacting element (7) that electroconductively connects the circuit carrier (4) to the carrier structure (2) by means of a connecting element (3) in order to form a potential equalization, the contacting element (7) having a bondable surface coating (5).
Abstract:
In a conductive film formed by photo sintering of a film composed of copper particulates, adhesiveness to a base material of the conductive film is improved. A circuit board 1 includes a circuit including a conductive film 2, and a substrate 3. The circuit board 1 further includes a resin layer 4 between the substrate 3 and the conductive film 2. The substrate 3 is made of a non-thermoplastic base material 31. The resin layer 4 contains a thermoplastic resin. The conductive film 2 is formed by photo sintering of a film composed of copper particulates 21, and thus improving adhesiveness of the conductive film 2 to the base material 31 through the resin layer 4.
Abstract:
A metal circuit structure, a method for forming a metal circuit and a liquid trigger material for forming a metal circuit are provided. The metal circuit structure includes a substrate, a first trigger layer and a first metal circuit layer. The first trigger layer is disposed on the substrate and includes a first metal circuit pattern. The first metal circuit layer is disposed on the first circuit pattern and is electrically insulated from the substrate. The composition of the first trigger layer includes an insulating gel and a plurality of trigger particles. The trigger particles are at least one of organometallic particles, a chelation and a semiconductor material having an energy gap greater than or equal to 3 eV. The trigger particles are disposed in the insulating gel, such that the dielectric constant of the first trigger layer after curing is between 2 and 6.5.
Abstract:
The invention provides a composition set comprising: a conductor layer-forming composition comprising a dispersing medium and inorganic particles comprising a metallic oxide; and a conductive adhesive composition comprising a binder and conductive particles having a number average particle size of from 1 nm to 3000 nm.
Abstract:
The present invention relates to the manufacturing method of metal clad laminates by forming a conductive layer on a single side or both sides of a material film that is made of an insulating material using the silver complexes having a unique structure and electroplating metals outside of said conductive layer. The present invention can provide the manufacturing method of metal clad laminates, which has a fast operation speed for mass production, simple process steps to minimize defective ratio and cheap production cost.
Abstract:
The invention relates to a process for producing a ceramic circuit board with electrical conductor traces and contacting points on at least one of the two sides, and with at least one through-hole contact (via). According to the invention, the following successive process steps are performed: a) Production of a ceramic substrate made of aluminium nitride and drilling of holes at the intended locations for the vias, b) Filling the holes with a first adhesive paste made of copper, tungsten, molybdenum or alloys thereof, or mixtures thereof, and c) Single-pass overprinting with a second adhesive paste using a first screen-printing operation on at least one side of the ceramic substrate with the desired layout of the conductor traces and contact points, d) Optionally, a full or partial repeat of overprinting with the second adhesive paste, e) Stoving the printed ceramic substrate in an oven with N 2 (nitrogen), wherein the oxygen content is kept controlled to 0-50 ppm O 2 , f) Overprinting using a second screen-printing process with a low-glass cover paste over the second adhesive paste until the desired thickness of the conductor traces and contact points is achieved, g) Stoving the printed ceramic substrate in an oven with N 2 (nitrogen), wherein the oxygen content is kept controlled to 0-50 ppm O 2 .