Abstract:
There is provided a resin-molded board that enables soldering of electronic components to the metal frame of the resin-molded board to be carried out well, with no increase in production cost. A metal frame is comprised of a plurality of frame parts that form an electric circuit pattern, and a resin layer is molded onto the metal frame. The resin layer has provided in a surface thereof first openings for soldering electronic components onto the metal frame, each of the first openings having exposed therein a corresponding one of the frame parts, and second openings associated with the first openings, respectively, for maintaining a temperature at the first openings at not less than a predetermined temperature when soldering the electronic components onto the metal frame in the first openings using a flow soldering method.
Abstract:
According to the invention, a microperforation (PMP) process step is combined with the lamination process. To this end, a dielectric layer (11,11') and a prefabricated product (1) are placed between two perforation dies (21,23) or a support and a perforation die. The prefabricated product (1) is partially covered by a conducting layer forming structures to be contacted by microvias. Pressure is applied on the perforation die (21,22), perforation tips of the perforation dies forming microvias for contacting the structures. A surface of the dielectric layer (11,11') or the prefabricated product (1) is configurated or coated to in a manner that the prefabricated product (1) and the dielectric layer (11,11') stick to each other after the pressure has been applied.
Abstract:
A printed wiring board having an embedded electric device is manufactured as follows. A first resin film having an opening or a sheet member having a recess is piled with a plurality of second resin films, on which a plurality of conductive layers are formed. The first and second resin films and the sheet member include thermoplastic resin. An electric device is inserted in the opening or the recess. Then, the piled body including the electric device is pressed and heated to integrate the piled body. When the piled body is pressed and heated, a plurality of electrodes of the electric device are electrically connected to the conductive layers while the first and second resin films and the sheet member plastically deformed to seal the electric device.
Abstract:
A method includes the steps of forming a first metal foil (82) on a surface of an insulator substrate (1a), drilling, with a thermosetting resin film (84) temporarily fixed to an opposite surface of the substrate, a through hole (86) simultaneously in the first foil, the substrate, and the resin film, simultaneously heating and vacuum-pressing the first foil, the substrate, the resin film, and a second metal foil (87) brought into contact with the resin film to obtain an intermediate board in which a bottom of the through hole is covered with the second foil and has a corner with a corner rounded portion (93) formed by the resin film, and forming a metal plating layer (95) on the first and the second foils, on the bottom and an inner wall of the through hole, and on the corner rounded portion to obtain a final printed wiring board.
Abstract:
A heated and pressed printed wiring board (100) is made by filling via-holes formed in layers of insulating film of the wiring board (100) with an interlayer conducting material. The insulating film is stacked with conductor patterns (22), and each conductor pattern (22) closes a via hole (24). The interlayer conducting material forms a solid conducting material (51, 52) in the via holes (24) after a heating a pressing procedure. The solid conducting material (51, 52) includes two types of conducting materials. The first type of conducting material (51) includes a metal, and the second type of conductive material (52) includes an alloy formed by the metal and conductor metal of the conductor patterns (22). The conductor patterns (22) are electrically connected reliably without relying on mere mechanical contact.
Abstract:
By filling a predetermined amount of conductive paste into an opening for forming a through hole or a VH formed in a resin insulating layer of a circuit board, and pressurizing the filled conductive paste under the condition of reduced pressure, removing air bubbles trapped in the conductive paste.
Abstract:
The present invention relates to a printed circuit plate (10) which is intended for testing electric components (20) having a plurality of connection contacts (21, 22) on their surfaces. The plate comprises an electrically isolated isolation layer (11) in which through-holes (12) are formed. The area about each through-hole (12) comprises a conductive contact pad (14) located on one surface of the isolation layer (11). A printed conductor (13) extends from each contact pad (14) mainly in the direction of an edge area in the isolation layer (11).
Abstract:
The invention relates to a method for producing an electrical connection between a flexible printed circuit (1) and a metallic contact partner (8). According to said method, an irradiation opening (5) is produced in a first insulating layer (2) and a connecting opening (6) is produced in a second insulating layer (3). A section (8a) of the metallic contact partner (8) is contacted with a strip conductor (4) through the connecting opening (6). The strip conductor (4) is welded/soldered at the connecting section (8a) through the irradiation heat produced by the laser light (9) which is directed through the irradiation opening (5).