Abstract:
Producing metal/ceramic circuit board comprises forming metal layer on side(s) of ceramic substrate (10) and resist on metal layer, then etching and removing portion of metal layer with etchant of mixed solution. The metal layer contains aluminum as principal component. The resist layer is shaped. The etchant of mixed solution is prepared by mixing ferric chloride with water without adding any acids to form metal circuit on ceramic substrate side(s). An independent claim is included for metal/ceramic circuit board comprising ceramic substrate and metal circuit plate (12) on side(s) of the substrate. The metal circuit plate has skirt spreading length of = 200 Micro on peripheral edge of the metal circuit plate. The corrugated is the maximum distance between straight lines parallel to the linear peripheral edge of the metal circuit plate to be formed. The metal circuit plate has skirt spreading length of = 200 Micro. The ratio of skirt spreading length to the thickness of the metal circuit plate is = 0.5. The skirt spreading length is a distance between a plane perpendicular to the principal plane of the metal circuit plate at one end of the bottom face of the metal circuit plate on the same side as one end of the bottom face of the metal circuit plate. The distance is positive when bottom face has greater area than the top face.
Abstract:
Disclosed are a printed circuit board and a method for manufacturing the same. The printed circuit board includes a core insulating layer, at least one via formed through the core insulating layer, an inner circuit layer buried in the core insulating layer, and an outer circuit layer on a top surface or a bottom surface of the core insulating layer, wherein the via includes a center part having a first width and a contact part having a second width, the contact part makes contact with a surface of the core insulating layer, and the first width is larger than the second width. The inner circuit layer and the via are simultaneously formed so that the process steps are reduced. Since odd circuit layers are provided, the printed circuit board has a light and slim structure.
Abstract:
The invention relates to a composite material, comprising a ceramic substrate S having at least one metal layer M on at least one surface of the ceramic substrate S, wherein said metal layer M has a specific shape in the lateral and/or vertical direction. The invention further relates to a corresponding layout of a conducting track and to the use of said layout, to a method for producing at least one conducting track, to a circuit board, and to a stamping and/or embossing tool.
Abstract:
The invention relates to an electronic device (100) having an electrically insulating support structure (102), an electrically conductive conductor path (104) on a surface of the support structure (102), and an electrically conductive contact structure (106) which extends from the surface into the support structure (102) and is electrically connected to the conductor path (104) at a connection point (108), thereby forming a common conductor track (110). The conductor path (104) and the contact structure (106) transition into each other in an enlargement-free manner at the connection point (108).
Abstract:
A printed circuit board includes an insulating layer, a circuit pattern on the insulating layer, and a surface treatment layer on the circuit pattern. The surface treatment layer includes a bottom surface having a width wider than a width of a top surface of the circuit pattern.
Abstract:
The present invention relates to electrically active devices (e.g., capacitors, transistors, diodes, floating gate memory cells, etc.) having dielectric, conductor, and/or semiconductor layers with smooth and/or dome-shaped profiles and methods of forming such devices by depositing or printing (e.g., inkjet printing) an ink composition that includes a semiconductor, metal, or dielectric precursor. The smooth and/or dome-shaped cross-sectional profile allows for smooth topological transitions without sharp steps, preventing feature discontinuities during deposition and allowing for more complete step coverage of subsequently deposited structures. The inventive profile allows for both the uniform growth of oxide layers by thermal oxidation, and substantially uniform etching rates of the structures. Such oxide layers may have a uniform thickness and provide substantially complete coverage of the underlying electrically active feature. Uniform etching allows for an efficient method of reducing a critical dimension of an electrically active structure by simple isotropic etch.
Abstract:
Die insbesondere für die Verwendung im Medizinalbereich vorgesehene Leuchtvorrichtung weist eine wenigstens eine Leuchtdiode (11) umfassende Leuchteinheit (1) auf, die über elektrische Leitungen (21, 22) mit einer Energieversorgungsvorrichtung (3) verbunden oder verbindbar ist. Erfindungsgemäss ist ein Verbindungselement (2) vorgesehen, das ein streifenförmiges, flexibles und isolierendes Basissubstrat (21) aufweist, das einseitig oder beidseitig mit Metall beschichtet ist, in das die elektrischen Leitungen (22; 23) eingearbeitet sind, die an einem Ende des Verbindungselements (2) zu Anschlüssen (25) der Leuchteinheit (1) und am anderen Ende des Verbindungselements (2) zu Anschlüssen (26) der Energieversorgungsvorrichtung (3) geführt sind, wobei die auf einer oder beiden Seiten des Basissubstrats (21) vorgesehenen Metallschichten (22, 23, 24) derart dimensioniert sind, dass sie das Basissubstrat (21) in einer gewählten Form halten.
Abstract:
A highly reliable copper circuit junction substrate which enables a semiconductor chip or a lead frame to be mounted on a ceramic base without causing the base to be broken or deformed by the conventional junction utilizing brazing or copper-copper oxide eutectic, thus accomplishing a junction with a high strength. The substrate is produced by forming on a ceramic base (1) either an intermediate layer (2) comprising a brazing material layer containing chiefly silver and copper containing an active metal or an intermediate layer (2) comprising a first intermediate layer containing the above brazing material layer or a high-melting metal layer and a second intermediate layer containing chiefly nickel, iron and copper and having a melting point of not higher than 1000 °C in order from the side of the base, and forming thereon a conducting layer (3) containing chiefly copper and being shorter by at least 0.05 mm than the intermediate layer in both the direction of length and the direction of width. An outer layer (5) containing chiefly Ni is further formed on the upper surface of the base substrate to give a copper circuit junction substrate. A semiconductor chip is mounted on the above substrate to give a semiconductor device.