Abstract:
A process for manufacturing a flexible wiring board according to the present invention comprises growing metal bumps 16 using a mask film patterned by photolithography. Fine openings can be formed with good precision, therefore, fine metal bumps 16 can be formed with good precision because laser beam is not used to form openings in a polyimide film. After metal bumps 16 have been formed, the mask film is removed and a liquid resin material is applied and dried to form a coating, which is then cured into a resin film. The coating can be etched at surface portions during coating stage to expose the tops of metal bumps 16.
Abstract:
The invention concerns a method and a device for connecting two millimetric elements. The method consists in producing in predetermined sites of each of the millimetric elements (13, 16) connecting zones (8) linked to a ground plane potential; then in carrying out the connection by predetermined links (17) between the connection zones (8) and between the conducting lines (6, 15) of the two millimetric elements (13, 16). The device consists in a coplanar line (17). The invention is particularly applicable to millimetric circuits using micro-strip conducting lines.
Abstract:
An antenna (12) includes: a base (2) having opposing first and second surfaces (2a, 2b) and opposing end surfaces; a radiation electrode (4) covering at least a portion of the first major surface (2b) of the base (2); a power terminal (5) disposed on the base (2) and operable to conduct signal power which is at least one of received and transmitted by the antenna; a mounting substrate (8) having spaced apart first and second major surfaces (8a, 8b); a first ground electrode (3) covering at least a portion of the second major surface (2a) of the base (2), wherein the base (2) is disposed on the mounting substrate (8) such that the second major surface (2a) of the base (2) is coupled to the first major surface (8b) of the mounting substrate (8) and a distance D is defined from the first major surface (2b) of the base (2) to the second major surface (8a) of the mounting substrate (8), and the radiation electrode (4) is electrically coupled to the first ground electrode (3) such that a gain of the antenna (12) is a function of the distance D.
Abstract:
The flexible printed substrate comprises an insulating resin layer comprising a low-linear expansion polyimide resin layer (2) and a thermoplastic polyimide resin layer (3), and a metal layer (1) or a wiring circuit formed on the low-linear expansion polyimide resin layer (2) of the insulating resin layer, wherein a mixed region of the polyimide resin components is formed in the interface between the low-linear expansion polyimide resin layer (2) and the thermoplastic polyimide resin layer (3). A flexible printed substrate imparted with an adhesive property for loading on an external substrate, a double printed substrate having formed on both surfaces thereof a metal layer or a wiring circuit, and a multilayer substrate having a multilayer structure are disclosed.
Abstract:
[Object] To provide a printed circuit board having electronic component functions buried in a substrate laminate. [Constitution] Holes of an inner substrate 2 are filled with a dielectric paste 6 and a resistor paste 7. These pastes are sealed with a plating layer 13. Thus, the functions of a capacitor and a resistor are buried in the inner substrate 2. Outer substrates 2, 3 are laminated to the inner substrate 2, and holes of the outer substrates 2, 3 are filled with a dielectric paste 6a and a resistor paste 7a, followed by sealing of these pastes with a plating layer 17. Thus, the functions of a capacitor and a resistor are buried in the outer substrates 2, 3. Therefore, the multilayer printed circuit board of the present invention has electronic component functions buried therein.
Abstract:
Microelectric chips are electrically connected to underlying substrates by means of elongated solder columns made possible by solder dams at the surface of the substrate, the dams being positioned about at least a portion of the connection pads on the surface. Substantial increases in the size of the matrix of such columns are achieved without exceeding applicable shear strain limits, due to the increased deformation of the connectors made possible by their increased length.
Abstract:
Assembly methods and apparatus for electrically stable connectors are described herein where a conductive wire assembly generally comprises an insulative substrate having a length, one or more conductive elements formed along a first direction upon the substrate, an insulative coverlay formed upon the one or more conductive elements, and at least one opening or window defined through the insulative coverlay exposing a portion of the one or more conductive elements. A conductive coating is formed upon the insulative coverlay such that the conductive coating is in contact with the portion of the one or more conductive elements through the at least one opening or window and the conductive coating may have at least one region removed along a second direction in proximity to the at least one opening or window such that one or more conductive pads are formed and are electrically isolated from a remainder of the conductive coating.
Abstract:
In accordance with an example embodiment of the present invention, an apparatus includes a substrate (202) having a plurality of conductive traces (212) terminating at a peripheral edge (203) of the substrate (202). An active display portion (204) is disposed on an upper surface of the substrate (202) and electrically coupled to the conductive traces (212) of the substrate (202). The peripheral edge (203) of the substrate (202) includes a protruding region (202') that extends beyond a peripheral edge (205) of the active display portion (204). A plurality of conductive bonding pads (208) are affixed at the protruding region (202') and coupled to the plurality of the conductive traces (212). A flexible circuit (206) includes a plurality of conductors electrically coupled to the plurality of bonding pads (208) at locations on or below a lower surface of the substrate (202).
Abstract:
A semiconductor device such as an LED illumination device includes a substrate sheet (2) and a plurality of LEDs (4) that are supported on the front of the substrate sheet. A plurality of apertures (9) extend through the substrate sheet (2) and thermally conductive elements in the form of conduits or tubes (1) extend through the apertures, while thermally conductive elements in the form of pads (10) extend between the LEDs and the tubes (1). Each tube (1) defines an open passage that extends through the apertures (9) between the front and the back of the substrate sheet (2), without obstruction. Heat generated in the LEDs is conducted to the tubes (1), from where it is dissipated through convection.
Abstract:
A semiconductor device such as an LED illumination device includes a substrate sheet (2) and a plurality of LEDs (4) that are supported on the front of the substrate sheet. A plurality of apertures (9) extend through the substrate sheet (2) and thermally conductive elements in the form of conduits or tubes (1) extend through the apertures, while thermally conductive elements in the form of pads (10) extend between the LEDs and the tubes (1). Each tube (1) defines an open passage that extends through the apertures (9) between the front and the back of the substrate sheet (2), without obstruction. Heat generated in the LEDs is conducted to the tubes (1), from where it is dissipated through convection.