Abstract:
The present invention discloses a multi-layer circuit board assembly having a first circuit portion having a top surface and a bottom surface a first pre-circuit assembly which is attached to the top surface of the first circuit portion and which includes a top conductive layer. A second pre-circuit assembly is attached to the bottom surface of the first circuit portion and includes a bottom conductive layer. An aperture is formed through the first circuit portion, the first pre-circuit assembly and the second pre-circuit assembly. A plurality of tab portions are integrally formed from the top conductive layer, which extend through the aperture and which are coupled to the bottom conductive layer.
Abstract:
An interposer for interconnection between microelectronic circuit panels (260) has contacts (250) at its surfaces. Each contact has a central axis normal to the surface and a peripheral portion adapted to expand radially outwardly from the central axis responsive to a force applied by a pad (262) on the engaged circuit panel. Thus, when the circuit panels (260) are compressed with the interposers, the contacts expand radially and wipe across the pads (262). The wiping action facilitates bonding of the contacts to the pads, as by conductive bonding material (246) carried on the contacts themselves.
Abstract:
A method for constructing a feedthrough via connection and a corresponding apparatus includes a metallic plate (101). A solderable contact area (103), is located on the plate (101). Next, an electrically insulating adhesive layer (105) is disposed onto the plate (101). This adhesive layer (105) has a feedthrough via (106) disposed therethrough aligned with the contact area (103). Then, a substrate (109) is disposed onto the adhesive layer (105). This flexible substrate (109) has a via (110) disposed therethrough with a solderable area (111) disposed thereon. A quantity of solder (113) is disposed onto the solderable area (111), and the assembly (100) is heated so that the solder (113) flows into the vias (106) and (110), thereby providing an electrical connection including the solderable area (111) of the via (110), the solder (113), and the contact area (103). During this reflow step, the structure of the adhesive layer (105) acts as a soldermask preventing the solder (113) from flowing outside of an area defined by the via (106).
Abstract:
Structure for mounting electronic devices thereon. The structure is fabricated from a plurality of substrates (4, 6, 8, 10) each having a thermally and/or electrically conductive core (12) surrounded by a dielectric material (13). The substrates can be adherently placed together with the electrically conductive cores providing ground and power planes or the substrates can be mounted together with connectors (42) electrically interconnecting adjacent substrates and spacing the adjacent substrates apart providing a space through which a fluid can flow to extract heat generated by the electronic devices mounted thereon. The conductive cores provide both power and ground planes to the structure and a means for thermally dissipating the generated heat.
Abstract:
A circuit board or each circuit board of a multi-layer circuit board includes an electrically conductive sheet coated with an insulating top layer covering one surface of the conductive sheet, an insulating bottom layer covering another surface of the conductive sheet and an insulating edge layer covering an edge of the conductive sheet. An insulating interlayer can be sandwiched between a pair of adjacent circuit boards of a multi-layer circuit board assembly. A landless through-hole or via can extend through one or more of the circuit boards for connecting electrical conductors on opposing surfaces thereof.
Abstract:
The invention relates to a method for creating a link in an integrated metal substrate comprising a first metallic layer (300) and a second metallic layer (100) which are separated by an insulating layer (200), comprising a stage in which a portion (22) of the first metallic layer (300) and a corresponding portion of the insulating layer (23) are cut out and said portions are inserted into the second metallic layer (100).
Abstract:
A printed circuit board assembly (10) employing a solder vent hole (32) adjacent solder filled interconnect vias (22) connecting to a conductive pallet (16), is disclosed. The solder vent hole (32) allows gases to escape from an otherwise sealed cavity (24) during solder reflow, relieving positive pressure and thereby allowing solder (26) to flow into it. By providing an escape path for trapped air and gases generated during solder paste reflow, the out-gassing pressure and weight of the molten solder is sufficient to allow the solder paste (26) to flow into the cavity (24).