Abstract:
It is intended to provide multi-piece circuit boards capable of preventing lowering of strength of joint sections between piece sections after cutoff and other sections, and determining material of flame sections regardless of material of a piece section, and board manufacturing method of such multi-piece circuit boards. For a mixed board including a defective piece section and a good piece section in a state in which an outermost layer is not formed yet, cut lines are made around bridges and are joined together by adhesive, and an upper layer is provided thereon, whereby a multi-piece circuit board mounted on good piece sections only is formed. A frame section may be formed by arranging respective piece sections manufactured in advance at positions at which the piece sections are to be present and injecting fluid matter to surround the respective piece sections arranged to form the frame section. Furthermore, joints between respective piece sections and frame section may be provided on the frame section to surround roots of respective bridges. Furthermore, an adhesive sheet may cover each joint.
Abstract:
In a manufacturing method of a rigid-flexible printed circuit board, slits for defining two sides of a removing portion are formed in a part of plural resin films, and the plural resin films are stacked and bonded to form a circuit board. Then, a product portion is cut from the circuit board. Before the bonding, a separation sheet is disposed between predetermined adjacent layers of the plural resin films to separate the removing portion from a residual portion of the product portion. Accordingly, while the product portion is cut from the circuit board, the removing portion is separated from the product portion, because the removing portion are defined by the separation sheet, the slits, and a cutting outline of the product portion.
Abstract:
A multilayer integrated substrate includes breaking grooves arranged in a grid pattern so as to section the main surface of the substrate into a plurality of blocks, and also includes fracture-preventing conductor films arranged so as to cross the breaking grooves. The fracture-preventing conductor films contain a metal component that prevents undesirable fracturing of the multilayer integrated substrate along the breaking grooves.
Abstract:
The electronic device of the invention is such constructed that the antenna part (3) and the RF circuit part (4) can show their respective functions even after the antenna part (3) and the RF circuit part (4) have been separated. Besides a scribe line 6 is formed on anullpreferably ceramicnullsubstrate for separating the antenna part (3) from the RF circuit part (4). Both parts may be separated after a change in any environmental condition, such as a change in the circuit configuration of the board on which the device (10) is to be mounted.
Abstract:
To keep a flexible printed substrate planar when the substrate is set in a mounter for mounting parts and to miniaturize the substrate, the present invention proposes an electric substrate, for example, a flexible printed substrate on which electronic parts are mounted, the electric substrate having a first area (30: a part mounting area) formed therein, a second area (40: part mounting area) formed therein, and a third area (10: a separable area) that joins the first and second areas like a “bridge” and that can be removed when the substrate is assembled into predetermined equipment, the third area having a positioning hole 11 (one of a set of positioning holes) for use in mounting electric parts on the substrate.
Abstract:
A printed wiring board comprises an insulating layer having a plurality of recesses formed along a predetermined edge portion of the insulating layer to extend through a side surface of the insulating layer, tabs for establishing electrical connection with an external electronic apparatus and which are formed on a surface of the insulating layer along the predetermined edge portion in correspondence with the plurality of recesses, and extensions connected electrically to the respective tabs and extending into the respective recesses. The printed wiring board may further comprise a plurality of dummy pads which are buried under the insulating layer in correspondence with the tabs and the extensions and which are electrically insulated from each other. The extensions are joined to the dummy pads through the recesses. The resulting board comprises a structure in which tabs are not easily peeled from an insulating layer.
Abstract:
A green laminate for obtaining a multilayer substrate includes base material layer green sheets held between constraint layer green sheets. The green laminate includes constraint layer green sheets laminated on the outside of a laminate of base material layer green sheets, and cutting grooves are formed in the constraint layer green sheets. By burning the green laminate to obtain a sintered laminate, the difference between expansion and shrinkage behaviors due to the difference between the thermal expansion coefficients of the glass ceramic sintered layer and the ceramic powder fixed layer occurs in each of the regions divided by the cutting grooves, thereby relieving stress due to the difference between expansion and shrinkage behaviors.
Abstract:
A printed substrate board constructed, from a substantially unitary body includes at least one edge part along a side mountable into an external mounting device. The printed board includes individual board bodies having a shape that is out of parallel with the edge part. The individual board bodies have at least one portion of an opposing side joined to the edge parts through a secondary part. The secondary parts, combined with the individual board bodies, are substantially parallel with the edge parts and allow simple separation of each board body from the printed board along cutting boundary portions while enabling simplified orientation for later assembly.
Abstract:
In order to mass produce plates for holding connection pins of an electronic component in a predefined configuration, used to facilitate the mounting of the component on a printed circuit board, this process consists of introducing a board (11) of large dimensions into a numerically-controlled machine tool, operating the machine tool in order to create in board (11) perforations (12) whose diameter corresponds to that of the pins of the component, and to operate the machine tool in order to make precutting lines (13, 14) in board (11), so as to precut a plurality of plates (21) in the board, the precutting lines being distributed over the board so that each plate has perforations (12) having the predefined configuration.