Abstract:
An electrical circuit structure (100) can include a first trace (105) formed using a first conductive layer and a second trace (110) formed using a second conductive layer. The first trace can be vertically aligned with the second trace. The electrical circuit structure can include a via segment (115) formed of conductive material in a third conductive layer between the first conductive layer and the second conductive layer. The via segment can contact the first trace and the second trace forming a first conductor structure configured to convey an electrical signal in a direction parallel to the first conductive layer.
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:
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:
A method of providing thick copper conductors on a ceramic substrate is achieved by the steps of applying a seed layer in the form of a conductor pattern (2) on the ceramic substrate (1), applying an autocatalytic copper layer (3) on the conductor pattern (2) and on the substrate (1) outside the conductor pattern (2), applying a plating resist (4 to the areas that are not to be provided with thick copper conductors (5). Subsequently, copper is applied to the areas not protected by the plating resist (4), thus providing the thick copper conductors (5). The plating resist (4) is removed and finally the remaining autocatalytic copper (3) outside the conductor pattern (2) is removed. By the method is obtained a ceramic substrate (1) comprising a conductor pattern (2) on which is provided an autocatalytic copper layer (3) on which is provided thick copper conductors (5).
Abstract:
According to the present invention, when a semiconductor element (7) having protruding electrodes (5) formed thereon is connected to a circuit board (1) via conductive resin (6), stable connection is made even when an electrode pitch is small on the semiconductor element (7). On semiconductor element package regions on the circuit board (1), a paste electrode material (2) containing photopolymerizable materials is printed to form a film having a prescribed thickness, and this electrode material film (2) is baked after exposure and development thereof so as to obtain circuit electrodes (4) having edges warped in a direction of going apart from the circuit board (1) surface. Then, the protruding electrodes (5) and the concave surfaces of the circuit electrodes (4) are brought in abutment with each other and connected via the conductive resin (6) which surrounds the abutments between the respective electrodes and is held on the concave surfaces of the circuit electrodes (4). With this arrangement, the concave surfaces of the circuit electrodes (4) act as saucers and prevent the conductive resin (6) from being squeezed out, thereby eliminating possible occurrence of short circuits.