Abstract:
Fabricating (100, 1300) a printed circuit board includes fabricating patterned conductive traces (305, 310, 1410, 1415) onto a foil, laminating the patterned conductive traces to a printed circuit board substrate (405, 1505) by pressing on the foil, such that the conductive traces are pressed into a dielectric layer of the printed circuit board, and removing the foil to expose a co-planar surface of conductive trace surfaces and dielectric surfaces. Removal may be done by peeling (125) and/or etching (130, 1315).
Abstract:
The present invention provides a printed-wiring board which can make the electric wiring densified and can be thinned, even when having a BVH of a non-penetration hole filled with a selectively plating, formed therein for interfacial connection means. The printed-wiring board has a blind via hole connecting different wiring-pattern-formed layers with each other, wherein the blind via hole is a non-penetration hole filled with a plating, and the plating is not formed on a wiring pattern including the round of the blind via hole. The process for manufacturing the printed-wiring board having a blind via hole connecting different wiring-pattern-formed layers with each other includes the steps of: sequentially layering at least a metallic foil and a barrier metal layer to be differently etched from the metallic foil, on an insulation layer; preparing such a non-penetration hole as to reach a desired wiring-pattern-forming layer, by directly irradiating the barrier metal layer with a laser beam; cleaning the inside of the non-penetration hole by desmearing treatment; filling the non-penetration hole with a plating, and at the same time forming a plating on the barrier metal layer, by plating treatment; removing the plating which has been formed on the barrier metal layer and protrudes from the non-penetration hole, by etching treatment; peeling the barrier metal layer; and etching the metallic foil to form a wiring pattern.
Abstract:
In an example embodiment, the semiconductor device comprises a carrier and a semiconductor element, such as an integrated circuit. The carrier is provided with apertures, thereby defining connecting conductors having side faces. Notches are present in the side faces. The semiconductor element is enclosed in an encapsulation that extends into the notches in the carrier. As a result, the encapsulation is mechanically anchored in the carrier. The semiconductor device can be made in a process wherein, after the encapsulating step, no lithographic steps are necessary.
Abstract:
A multi-layer circuit board with heat pipes and a method for forming a multi-layer circuit board with heat pipes. The method includes forming channels in a first and second pre-circuit assembly and attaching the first pre-circuit assembly to the second pre-circuit assembly such that the channels cooperatively form a heat pipe.
Abstract:
An adhesive-free multilayered metal laminate having a given thickness which is obtained by bonding a metal sheet having a thin metal film on a surface thereof to a metal foil without using an adhesive; and a process for continuously producing the laminate. The process comprises the steps of; setting a metal sheet on a reel for metal sheet unwinding; setting a metal foil on a reel for metal foil unwinding; unwinding the metal sheet from the metal sheet-unwinding reel and activating a surface of the metal sheet to thereby form a first thin metal film on the metal sheet surface; unwinding the metal foil from the metal foil-unwinding reel and activating a surface of the metal foil to thereby form a second thin metal film on the metal foil surface; and press-bonding the activated surface of the first thin metal film to that of the second thin metal film so that the first thin metal film formed on the metal sheet is in contact with the second thin metal film formed on the metal foil.
Abstract:
A method 10 for making a multi-layer electronic circuit board 110 having electroplated apertures 18, 20 which may be selectively and electrically isolated from electrically grounded member 12 and further having selectively formed air bridges and/or crossover members 50 which are structurally supported by material 54, and further having certain exposed connection surfaces 112, selectively and electrically connected to certain electrically conductive members 34, 42, and 44.
Abstract:
A multilayer printed wiring board having a wiring lead-out port has a signal circuit conductor perfectly covered by an earth circuit in its inside and a wiring lead-out port. A signal circuit conductor having a branch pattern is preferable. A large number of products can be easily manufactured with good size reproducibility. The multilayer printed wiring board is manufactured by selectively etching the copper of a cladding sheet manufactured by bonding a copper foil to a nickel foil with 0.1-3 % reduction and forming a signal circuit conductor covered by an earth circuit and the wiring lead-out port.
Abstract:
A lamination process and structure of a high layout density substrate is disclosed. The lamination process comprises the following steps. First of all, a plurality of laminating layers are individually formed, wherein each laminating layer has a first dielectric layer, a plurality of first vias and a patterned conducting layer. Next, a bottom layer having a second dielectric layer and a plurality of second vias is formed. Then, the laminating layers and the bottom layer are stacked. Finally, the laminating layers and the bottom layer are laminated simultaneously to form a multiplayer substrate at one time.
Abstract:
A multi-layer circuit board having apertures that are selectively and electrically isolated from electrically grounded member and further having selectively formed air bridges and/or crossover members which are structurally supported by a polymeric material. Each of the apertures selectively receives an electrically conductive material.
Abstract:
A method for making a multi-layer circuit board 116 having apertures 96, 98 which may be selectively and electrically isolated from electrically grounded member 46 and further having selectively formed air bridges and/or crossover members 104 which are structurally supported by material 112. Each of the apertures 96, 98 selectively receives electrically conductive material 114.