Abstract:
The present disclosure provides a method for manufacturing a board-to-board connection structure. The method includes defining a first through hole in a first circuit board, disposing a first connector within the first through hole by a first conductive paste, and connecting the first connector to a second circuit board on which a second connector is installed, thereby realizing a connection of the two circuit boards, and reducing a height of the two circuit boards after the connection. That is, the height of the board-to-board connection structure is reduced. Additionally, since the first connector is received within the first through hole, the first connector is not easy to be damaged and oxidized. The present disclosure further provides a board-to-board connection structure manufactured by the above method.
Abstract:
Disclosed is a copper foil including a copper layer and having a tensile strength of 29 to 65 kgf/mm2, a mean width of roughness profile elements (Rsm) of 18 to 148 μm and a texture coefficient bias [TCB(220)] of 0.52 or less.
Abstract:
In a mark forming step in a manufacturing method for a component incorporated substrate in which an electronic component is positioned with reference to a mark formed in a copper layer, when an imaginary line extending from a search center of a search range of a sensor, to an edge side of the search range is represented as a search reference line and an imaginary line extending, in a state in which a mark center, is matched with the search center, from the mark center in the same direction as the search reference line to an outer ridgeline of the mark is represented as a mark reference line, the mark formed in a shape in which the outer ridgeline of the mark is present in a position where a length of the mark reference line is in a range of 30% or more of the search reference line.
Abstract:
An electronic module includes a plurality of loads, a first wiring portion, a second wiring portion, a power source unit, and a feedback portion. The first wiring portion includes a plurality of first portions to which the plurality of loads are respectively connected, and a plurality of second portions each closest to a corresponding one of the plurality of first portions. The second wiring portion is connected to the plurality of second portions. The power source unit includes a feedback terminal, an output terminal, and a power source circuit. In the first wiring portion, a minimum path length from each of the plurality of second portions to the corresponding one of the plurality of first portions is smaller than 1/2 of a minimum path length from a part of the first wiring portion connected to the output terminal to the corresponding one of the plurality of first portions.
Abstract:
A conductive trace interconnect tape for use with a printed circuit board or a flexible circuit substrate comprises a top insulating layer, an electrically conductive layer, and a bottom insulating layer. The top insulating layer is formed from electrically insulating material and is configured to provide electrical isolation from electrically conductive objects that are positioned on top of the conductive trace interconnect tape. The electrically conductive layer is positioned underneath the top insulating layer. The electrically conductive layer is formed from electrically conductive material and includes electrical interconnect traces, electrical component pads, or electrically conductive planar portions. The bottom insulating layer is positioned underneath the electrically conductive layer. The bottom insulating layer is formed from electrically insulating material and is configured to provide electrical isolation from electrically conductive objects that are positioned on the printed circuit board or flexible circuit substrate.
Abstract:
Film for use in preparing a printed circuit board (PCB) along with methods for making a PCB and producing a printable film are described herein. The film includes a first layer formed of a radiation-transparent material, a second layer formed of a curable adhesive material, a third layer formed of an electrically conductive material, and optionally, a fourth layer formed of an adhesive and a fifth layer formed of a removable material. Through the adhesive layers, the layers are bonded together to produce the printable film. To produce a PCB, the first layer is covered in ink distributed in a pattern representing the PCB, and the ink-covered film is exposed to radiation until the non-ink-covered portions of the second layer have cured. Then, the fifth layer is removed tearing away the electrically conductive material associated with the non-ink-covered portions of the second layer producing the PCB.
Abstract:
A printed wiring board includes a multilayer core substrate, a first buildup layer formed on the multilayer core substrate and including an interlayer insulation layer and a conductive layer, a second buildup layer formed on the multilayer core substrate and including an interlayer resin insulation layer and a conductive layer, and an end-surface through hole conductor formed on side surfaces of the first and second buildup layers and core substrate such that the through hole conductor connects the conductive layers of the first and second buildup layers. The core substrate includes a first conductive layer, a middle conductive layer, a second conductive layer, a first insulation layer between the first and middle conductive layers and a second insulation layer between the second and middle conductive layers, and the middle conductive layer is connected to the through-hole conductor and has thickness greater than thicknesses of the first and second conductive layers.
Abstract:
A circuit structure for hot-press bonding includes a first substrate, a second substrate and a conductive adhesive layer. The circuit structure further includes a first conductive layer having a plurality of connection electrodes arranged on the first substrate, a second conductive layer including a plurality of backup electrodes respectively corresponding to the connection electrodes, an insulating layer arranged between the first conductive layer and the second conductive layer, and a plurality of conductive via arranged in the insulating layer and connected to corresponding connection electrodes and backup electrodes to provide current conduction paths therebetween, thus provide additional conduction path for the connection electrodes even the connection electrodes have fracture and enhance yield and connection reliability.
Abstract:
A printed wiring board includes a multilayer core substrate, a first buildup layer formed on the multilayer core substrate and including an interlayer insulation layer and a conductive layer, a second buildup layer formed on the multilayer core substrate and including an interlayer resin insulation layer and a conductive layer, and an end-surface through hole conductor formed on side surfaces of the first and second buildup layers and core substrate such that the through hole conductor connects the conductive layers of the first and second buildup layers. The core substrate includes a first conductive layer, a middle conductive layer, a second conductive layer, a first insulation layer between the first and middle conductive layers and a second insulation layer between the second and middle conductive layers, and the middle conductive layer is connected to the through-hole conductor and has thickness greater than thicknesses of the first and second conductive layers.
Abstract:
In a mark forming step in a manufacturing method for a component incorporated substrate in which an electronic component is positioned with reference to a mark formed in a copper layer, when an imaginary line extending from a search center of a search range of a sensor, to an edge side of the search range is represented as a search reference line and an imaginary line extending, in a state in which a mark center, is matched with the search center, from the mark center in the same direction as the search reference line to an outer ridgeline of the mark is represented as a mark reference line, the mark formed in a shape in which the outer ridgeline of the mark is present in a position where a length of the mark reference line is in a range of 30% or more of the search reference line.