Abstract:
Methods are provided for making plated through holes usable for inserting and attaching connector probes. In a first method, a curved plated through hole is formed by bonding curved etchable wires to a first substrate, plating the wires with a non-etchable conductive material, encasing the plated wires with a dielectric material to form a second substrate, planing the second substrate to expose the etchable wire, and etching the wires to leave plated through holes. In a second method, wires coated with a first etchable layer are initially bonded to a substrate, a second non-etchable plating layer is then applied over the first layer, and the first layer is etched away leaving plated through holes with wires disposed inside. In a third embodiment, a layer of masking material is initially deposited on a substrate and etched to form holes which are filled with a sacrificial fill material, the masking material is then removed, the fill material plated, grinding is performed to remove some plating to expose the fill material, and the fill material is then etched away leaving plated attachment wells. Probes may be attached to the plated through holes or attachment wells to create resilient spring contacts to form a wafer probe card assembly. A twisted tube plated through hole structure is formed by supporting twisted sacrificial wires coated with the plating material in a substrate, and later etching away the wires.
Abstract:
In some embodiments, annular via drilling (AVD) technology is presented. In this regard, an annular via is introduced comprising an inner wall and an outer wall, the inner wall and the outer wall coupled with a dielectric layer and extending linearly from a surface of a conductor to a top of the dielectric layer. Other embodiments are also disclosed and claimed.
Abstract:
A lead-attached electrical element and a mounting board to which the lead-attached electrical element is mounted both contribute to a reduction in the size of the mounting board as well as facilitate rework. The lead-attached electrical element is constituted from an electrical element and two leads. Each lead includes a main portion which is bonded to a respective electrode face of the electrical element, and a bent portion which is inclined with respect to the main portion. The mounting board is constituted from a PC (printed circuit) board and the lead-attached electrical element. Two conductive lands are provided on a surface of the PC board. The lead-attached electrical element has been inserted into an aperture in the PC board, and bent portions of the leads attached to the electrical element are bonded to the conductive lands so that the electrical element is suspended in the aperture by the leads.
Abstract:
An article of manufacture and system, as well as fabrication methods therefore, may include a plurality of lands disposed on a surface of a substrate wherein the lands are oriented at an angle to the surface of the substrate and further wherein the substrate is formed of conductive layers that are formed such that a non-conductive layer does not interpose between the conductive layers and their coupling.
Abstract:
A method and apparatus for through-contacting flexible substrates 1, in particular circuit boards, having electrically conductive contact zones 4, 41 present on two opposing surfaces 1a, 1b of the substrate provides that a cut 11 is produced obliquely to the surfaces of the substrate in the area of the contact zones, and the two substrate areas 20, 30 adjoining the oblique cut are moved past each other until they lock behind each other. Moving them past each other is effected by a ram 12, by the action of compressed air 13, by applying a vacuum 14 or by a driving hook 15 fixed to the cutting tool. The two steps of producing the cut and moving the two substrate areas adjoining the cut past each other are effected in a common processing station, preferably in a single operation.
Abstract:
A multi-layer printed circuit board (PCB) includes a first wire layer, a middle layer above the first wire layer, a second wire layer above the middle layer, and a slanting via formed in the middle layer and the second wire layer. The manufacturing method includes the steps of providing a first wire layer and forming a first wiring on the first wire layer, forming a middle layer on the first wire layer, forming a second wire layer on the middle layer, forming a slanting via in the middle layer and the second wire layer wherein the direction of the slanting via is not orthogonal to the first and the second wire layers, forming a second wiring on the second wire layer by an etching method, and forming an electroplated layer in the via to connect the first wiring and the second wiring.
Abstract:
The wiring substrate comprises: a recess section and a projecting section formed on at least one surface of the wiring substrate; and wires formed on both the recess section and the projecting section.
Abstract:
A method and apparatus for making angled vias in an integrated circuit package substrate includes providing an integrated circuit package substrate having an upper surface and a lower surface. A first position is selected for a first via opening on the upper surface of the package substrate, and a second position is selected for a second via opening on the lower surface of the package substrate. A selected non-vertical angle is determined for forming an angled via through the first position and the second position. The angled via is formed through the first position and the second position at the selected non-vertical angle.
Abstract:
Circuit boards, microelectronic devices, and other apparatuses having slanted vias are disclosed herein. In one embodiment, an apparatus for interconnecting electronic components includes a dielectric portion having a first surface and a second surface. A first terminal is disposed on the first surface of the dielectric portion for connection to a first electronic component. A second terminal is disposed on the second surface of the dielectric portion for connection to a second electronic component. The apparatus further includes a passage extending through the dielectric portion along a longitudinal axis oriented at an oblique angle relative to the first surface. The passage is at least partially filled with conductive material electrically connecting the first terminal to the second terminal.
Abstract:
A method and structure are provided for implementing enhanced electronic packaging and printed circuit board (PCB) layout. A diagonal via is formed at a selected angle between a first side and an opposite second side of a printed circuit board at a selected printed circuit board location. The diagonal via is plated with an electrically conductive material. Diagonal vias are used to interconnect between a high-density pitch on the first side and a larger pitch on the opposite second side of the printed circuit board. The diagonal vias can be used to selectively interconnect electrical patterns of selected layers and eliminate the use of blind and buried vias.