Abstract:
The invention relates to a flexible strip conductor connection, by means of which electrical connections between an electrical device (2) and an external component (1) can be made, wherein the strip conductors (8) are located in or on a flexible foil (3), which is clamped on the electrical device (2) as well as the external component (1). In a predetermined area in the course of the strip conductors (8), the flexible foil (3) has a loop (6), which can be filled with an elastic material perpendicularly in relation to the foil plane, or the strip conductors (8) in the plane of the foil respectively have a loop-shaped deviation (9) perpendicularly to the course of strip conductor.
Abstract:
A printed wiring board assembly includes a pallet that is coupled to the bottom surface of a printed wiring board. An insert is provided having a first portion that is slidably mounted to the pallet and a second portion that is bonded to the bottom surface of the printed wiring board so that the insert is movable, relative to the pallet, in a plane parallel to the PWB. In one embodiment, the pallet includes an opening having a first portion and a second portion that is larger than the first portion, and the first and second portions of the insert fit at least partially in the respective first and second portions of the pallet opening. In another embodiment, the insert has a thickness that is equal to or greater than the thickness of the pallet.
Abstract:
A flexible circuitized interposer (50) and method of making same wherein the interposer includes at least one flexible circuitized substrate (53) having a dielectric (e.g., polyimide) layer (54) with a conductor (55) and plated elements (56), e.g., copper pad, including possibly with dendrites (57) thereon for enhanced connection, an apertured support member (58) aligning with the conductor, and a support member (60) having the apertured member thereon. When the interposer is engaged, the flexible circuitized substrate (53) is depressed within the aperture (59). Various alternatives, including a support (60") formed with compression portions (69) that extend into respective apertures (59) in the support member (58), and an interim, compressible support (60""), are disclosed. Flexure is also enhanced by utilization of patterns of one or more apertures (64) in the flexible substrate relative to and substantially surrounding the positioned conductors (56). Electrical assemblies including a pair of circuitized substrates electrically interconnected by the defined interposers are also described.
Abstract:
The signal transmission flat cable provided includes a first layer of substrate membrane, a second layer of a plurality of parallel traces for transmitting the signal, a third layer of finger array and a fourth layer of thin polyester membrane. The third layer of finger array covers the second layer. The fourth layer of thin polyester membrane is used to protect the second layer and third layer. The signal transmission flat cable is characterized in that the plurality of finger arrays are provided in the third layer at a plurality of predetermined locations along the flat cable and each of the plurality of finger arrays is spaced from each other by a given distance. A glue material is provided to bond the fourth layer and the second layer along the given distance. As a result, the flat cable has the module capability by which an user may cut away the excess portion of the flat cable depending on different requirement, such that the remaining portion of the flat cable may be inserted into the keyboard socket on the motherboard of a computer.
Abstract:
A structure of the flexing section of a multilayer flexible circuit board wherein at least one layer of a flexible insulation base material is bonded, via an adhesive agent layer, between a plurality of wiring conductors on which required wiring patterns are formed with conductive foil, the flexible insulation base material of the flexing section of the multilayer flexible circuit board being provided with a non-bonded portion so that it is not bonded with the wiring conductors or another flexible insulation base material at least on one surface.
Abstract:
A composite flexible substrate (100) is constituted with an inside flexible substrate (1) and an outside flexible substrate (2) having a zigzag-shaped part (Z.sub.1), and the outside flexible substrate (2) is superposed on the inside flexible substrate (1) and is fixed at both end parts of the inside flexible substrate (1) and the outside flexible substrate (2). When the inside flexible substrate (1) is longitudinally bent, the outside flexible substrate (2) is deformed due to stretching of the zigzag-shaped part (Z.sub.1) without irregularly deforming the inside flexible substrate.
Abstract:
An electronic module assembly (50) has a bendable base plate (52) upon which circuit components (76) are mounted. A module enclosure device (56) mates with the base plate and has an integrally formed, non-removable support arm (96). During assembly, the base plate (52) is bent around the support arm (96) in a "C" shape. Thus formed, the base plate (52) and the module enclosure device (56) form an internal cavity that holds the circuit components (76).
Abstract:
An electronic module assembly (31) is provided by assembling components (17) to a planar polyimide flex circuit film (14) laminated to an aluminum rigidizer plate (11). The flex circuit film and rigidizer are then bent by a sheet metal bending process such that the rigidizer plate forms an exterior protective housing and the components are provided in an interior space (30). Connector pins (23) provide external electrical access to the components and circuit patterns (15, 16, 19) on the film (14). Structures (24, 25, 29) mate with the bent plate and substantially enclose the interior space. Module cost is reduced since the existing flex circuit rigidizer plate is used to form part of the module housing, and economical planar component assembly techniques are utilized while eliminating the step of mounting the flex circuit rigidizer plate to an external module housing. Two techniques for using a mandrel shaft (26, 35) to bend the plate (11) without stressing the film (14) are disclosed.
Abstract:
Terminations (10, 40, 70, 90) for flexible printed circuitry comprises thermosetting epoxy or polyimide prepreg sheets (36, 56, 64, 88, 102) in the rigid portion, instead of thermoplastic acrylic adhesive, partial coverlays (20, 50, 84, 94) instead of full coverlays and, as desired, rigidized members of epoxy or polyimide glass (16, 52, 54, 86) or prepreg internally as well as externally of the terminations. Anchor pads 34 secured to plated-through holes (38) minimize z-axis expansion of the terminations.
Abstract:
A flexible circuit having termination features incorporated as an integral part thereof and a method of making the same is presented. In accordance with the manufacturing process of the present invention, the end portion of a flexible circuit of standard construction (i.e., conductive traces sandwiched between a flexible base substrate and a flexible cover film) is folded back on itself, frequently with a spacer captured in the fold, and adhesively laminated together. This laminated assembly has a thickness equal to that required for formation of reliable connector pins. Next, a small section of this folded end portion has at least the outer non-conductive cover film removed, preferably by laser techniques, to expose a plurality of connector pins or fingers. The connector fingers will have the desired thickness, width and shape to allow for direct insertion into a mating component (i.e., through-holes on a rigid or flexible circuit board; or into a receptacle such as a female connector). The fingers are preferably solder coated to allow the flexible circuit of the present invention to be attached using common solder reflow techniques.