Abstract:
A method for manufacturing a printed wiring board in which a copper foil and a resin layer can be machined simultaneously without etching the copper foil when via holes are made in a copper-clad laminate using a carbon dioxide gas laser. Recesses, e.g. via holes (8), are made in a copper-clad laminate (1) using a carbon dioxide gas laser (7), an etching resist layer (10) is formed by performing interlayer electrical connection plating (9), the etching resist layer is exposed and developed and then circuit etching is performed to manufacture a printed wiring board (11). The printed wiring board is manufactured using a copper-clad laminate having a corrugated outer layer copper foil (C).
Abstract:
The invention relates to an apparatus for achieving good contact between earth legs (11b, 11d) of a microwave circuit (1) against a corresponding earth connection on a circuit board (3). Earth connection areas (15a, 15b) are shaped directly from a carrier (5) of the circuit board (3), said carrier (5) being manufactured of an electrically conducting material, such as brass or copper, at the location on the circuit board (3) where the microwave circuit (1) is mounted, so that the earth connection areas (15a, 15b) protrude up above the top side (13) of the carrier. The microwave circuit (1) is mounted against the circuit board (3) at the intended location by connecting its legs (11a, 11b, 11c, 11d) to the intended connection area on the circuit board (3), the earth legs (11b, 11d) of the microwave circuit being connected against the shaped earth connection areas (15a, 15b). A method for manufacturing the above apparatus is described.
Abstract:
PROBLEM TO BE SOLVED: To solve the problem in which when mounting is performed beyond an uneven part by use of a flexible sheet including a conductive layer, the minimum curvature radius of the sheet prevents miniaturization of a mounting structure. SOLUTION: The connecting structure for electronic device includes a first surface including a first conductor, a second surface including a second conductor, an end of the first surface substantially parallel to Y axis, and a flexible sheet-like connecting body including a conductive layer. The end is taken as the origin of X coordinate, and the direction from the second surface to the first surface is taken as positive direction of Z coordinate. The first conductor and the sheet-like connecting body are electrically connected by a first connecting terminal, and the second conductor and the sheet-like connecting body are electrically connected by a second connecting terminal. The sheet-like connecting body has a form such that it extends from the first connecting terminal to the second connecting terminal across the end, wherein the Y component of the distance between a point where the Z coordinate of the sheet-like connecting body becomes smaller than the first surface first when advancing from the first connecting terminal to the second connecting terminal along the surface and the second connecting terminal is larger than the X-component of the distance between the end and the second connecting terminal. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a structure for mounting an electronic component, which improves a bonding strength between a bump electrode and a substrate-side terminal, improves the reliability of a conductive connection state and allows easy manufacture. SOLUTION: The bump electrode 12 includes base resin 13 arranged on an active face 121a of the electronic component 121 and a conductive film 14 which covers part of a surface of base resin 13, exposes a remaining part and performs conduction to an electrode terminal 16 installed on the active face 121a. Base resin 13 includes an opening 13b surrounding a plurality of electrode terminals 16, a connection 13A whose one end is connected to the electrode terminal 16 and on which part of the conductive film 14 pulled out to the surface is disposed and an adhesion part 13a which is formed in a region except for the opening 13b and the connection 13A and is bonded to a substrate. The base resin 13 is elastically deformed in the connection 13A. Thus, the adhesion part 13a is bonded to the substrate, and the conductive film 14 and the terminal on the substrate are kept in a connection state. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
A method for manufacturing a semiconductor device includes: preparing a wiring board having a base substrate and wiring that is plated on surface with a plating metal; pressing a bump that is formed on the active side of the semiconductor chip against an end part of the wiring of the wiring board, thereby exfoliating the area surrounding the pressed portion of the wiring from the base substrate while keeping the end of the wiring bonded with the base substrate; melting the plating metal that is located on the end part of the wiring, thereby causing the plating metal and the bump to form an alloy that bonds the bump and the wiring and infiltrate the plating metal into a space between the wiring and the base substrate; and judging that the bump and the wiring are well bonded if the plating metal has infiltrated a space between the wiring and the base substrate so as to have an area, width or length of infiltration that exceeds a reference value.
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit board module capable of preventing a short circuit of an electronic component even when an electronic component having a height larger than those of the other electronic components is included in mounted electronic components, and allowing reduction of its thickness; and an electronic apparatus equipped with the same. SOLUTION: This circuit board module is provided with: a board 1 having a mounting surface; the electronic components 2 mounted on the mounting surface; a frame body 4 surrounding the electronic components 2, mounted on the mounting surface, and having conductivity; a resin part 6 located inside the frame body 4, and tightly fitted to the electronic components 2, the mounting surface and the frame body 4; and a lid part 8 covering the electronic components 2, having conductivity and connected to the frame body 4. The lid part 8 has a flat part 82 projecting outward relative to the other parts in a part including a region corresponding to the component 2H having a height larger than those of the other components within the electronic components 2. COPYRIGHT: (C)2009,JPO&INPIT