摘要:
A connection terminal (80) to mount an electronic component (2) is formed on a first base material in which a metal foil is disposed on a support body so as to be detachable. Then, the connection terminal (80) and a bump (20) of an electronic component (2) are electrically connected and underfill material (4) is filled between the electronic component (2) and the first base material. Next, insulative material (3) is disposed on the first base material to cover the electronic component (2). Then, the support body and the metal foil are detached, and the unnecessary portion of the exposed metal foil is etched away. Accordingly, a wiring board (1) with a built-in electronic component is obtained.
摘要:
A method of producing a printed wiring board (3) comprising a mounting recess portion (1) for mounting an electronic part, a conductor pattern (7), and a heat-sink plate (6) arranged at the bottom of the mounting recess portion (1), characterized in that a conductor pattern (7) is formed on an insulating substrate (5); a heat-sink plate (6) is adhered to a lower face of a portion of the insulating substrate (5) forming the mounting recess portion; and a laser beam (2) is irradiated to an upper face of the portion (10) forming the mounting recess portion to form a mounting recess portion (1).
摘要:
A process for producing circuit boards, which process comprises the steps of:
1. forming circuitry on the outer surfaces of a copper clad laminte; 2. applying a desense mask to the surfaces; 3. drilling holes in a desired array; 4. activating the holes to accept plating therein; thereafter 5. stripping the desense mask from the surfaces; 6. applying a plating mask to the surfaces; 7. optionally, cleaning the surfaces not covered by the plating mask; and 8. plating the hole surfaces and any other surfaces not covered by the plating mask with a metallic coating.
摘要:
A method of making a plate through hole printed circuit board, comprises the steps of: a) forming conductive circuit elements (10) on two opposed faces of a paper phenolic containing substrate (11); b) coating the substrate and circuit elements with a de-sensitising material (12); c) forming holes (13) through the substrate, each hole passing through a circuit element on each of the opposed faces of the board; d) treating the board to render the substrate exposed in the holes receptive to the action of a metallic plating solution; e) removing the de-sensitising material; f) printing an acid-resist mask (14) on to both faces of the board, the mask leaving exposed only a small area of the board surrounding each hole therethrough; and g) treating the board with an electroless nickel-plating solution to deposit nickel (15) in the holes to the desired thickness to provide an electrical connection through each hole between two opposed conductive circuit elements.
摘要:
Die Erfindung betrifft ein Siebdruckverfahren zur Herstellung gedruckter Schaltungen mittels einer gegen Ätzmittel resistenten Paste (P), bei dem Leiterbahnenmuster auf metallkaschierte Isolierstoffplatten (1) aufgedruckt werden. Nach dem Druckvorgang und dem Abheben des Drucksiebes (4) von der Isolierstoffplatte (1) werden mittels einer mit einem atmosphärischen Unterdruck betriebenen, die wirksame Fläche des Drucksiebes (4) überstreichenden Saugrakel (7) die im Drucksieb (4) verbliebenen Pastenrückstände (11) abgesaugt.
摘要:
A method for the manufacture of printed circuit boards is provided comprising conditioning the board, activating with a catalytic metal, post-activating, stabilizing and etching the copper surfaces before the desired circuit is formed on the board. This process eliminates the need for a flash coating of copper in the through holes before the use of protective coatings such as imaging resists and soldermasks.
摘要:
The specification described a process for making a plating mask 17, for use in printed wiring board fabrication, with greater precision and definition that has previously been possible. An insulative substrate 11 includes on one surface a thin metal film (13). The film is covered with a relatively thick first mask layer (16) which is selectively removed to expose portions of the metal film, which are in turn removed to expose portions of the insulative substrate (11). The exposed portions of the insulative substrate are covered with a relatively thick plating mask layer (17) which abuts against the first mask layer (16). The first mask layer is then removed, leaving the remaining plating mask layer as a patterned plating mask which is then used as a mask for deposited metal (19) which defines a printed circuit.
摘要:
A rigid-type multilayer printed wiring board is produced by bonding a multilayer printed wiring sheet substantially comprising a thin insulating resin layer (1), at least one metal foil printed wiring layer (8, 11) and a plurality of conductive holes (7) formed through the two layers onto a metal board (10) through an insulation laminate (9). In this method, a multilayer printed wiring interlayer sheet consisting of the multilayer printed wiring sheet retaining a printed wiring pattern unprocessed metal foil (2b) on one surface thereof is prepared first. In this case, a given printed wiring has already been processed on the other surface and sometimes in the inner portion of the interlayer sheet. Then, the other surface of the interlayer sheet is bonded to the surface of the metal board through the insulation laminate. Thereafter, a desired printed wiring pattern is formed on the printed wiring pattern unprocessed metal foil (2b) on the one surface of the interlayer sheet.