Abstract:
A method of manufacturing a multi-layer printed circuit board includes the following steps (A) and (B). (A) Providing penetrating openings which are formed into through holes and each of which has a small diameter for a core substrate, and (B) providing penetrating openings which are formed into through holes each having a large diameter for the core substrate.
Abstract:
A method of manufacturing an optical component embedded printed circuit board, the method including: stacking a first insulation layer on one side of a metal core; embedding an optical component in a cavity formed in the metal core; stacking a second insulation layer of a transparent material on the other side of the metal core; and forming a circuit pattern on the first insulation layer, the circuit pattern electrically connected with the optical component.
Abstract:
It is an object of the present invention to provide a printed circuit board that can be housed at high density in the enclosures of electronic devices. The printed circuit board (40) according to a preferred embodiment of the invention has a construction with a substrate (1), a conductor (7) formed in a flexible region (36) and conductors (8,9) formed in non-flexible regions (46). The conductor (7) formed in the flexible region (36) has a total thickness of 1-30 μm, and the conductors (8,9) formed in the non-flexible regions (46) have a total thickness of 30-150 μm.
Abstract:
Disclosed is a substrate for a semiconductor package in which leakage of radiation noise from a gap between a semiconductor element and a mounting substrate can be prevented. The substrate for the semiconductor package includes a coplanar waveguide including a signal and ground electrodes on the mounting substrate, the signal electrode flip-chip connected to the semiconductor element, the ground electrodes arranged on both sides of the signal electrode with intervals therebetween. A step part is formed in the ground electrodes in an outer circumferential part of a mounting region of the semiconductor element, the step part having a larger distance between upper surfaces of the mounting substrate and the ground electrode in the outer circumferential part of the mounting region than such distance in the mounting region, and an insulator for covering the signal electrode in the outer circumferential part of the mounting region is formed.
Abstract:
A semiconductor device includes a substrate, a first recessed conductive layer embedded and recessed into a first surface of the substrate, and a first raised conductive layer disposed above the first surface. A first vertical offset exists between an upper surface of the first recessed conductive layer and an upper surface of the first raised conductive layer. The device includes a second recessed conductive layer embedded and recessed into a second surface of the substrate. The second surface of the substrate is opposite the first surface. The device includes a second raised conductive layer disposed beneath the second surface and an interconnect structure disposed on the first recessed and raised conductive layers and the second recessed and raised conductive layers. A second vertical offset exists between a lower surface of the second recessed conductive layer and a lower surface of the second recessed conductive layer.
Abstract:
Disclosed is a printed circuit board including an insulation member on which a first region and a second region are defined, a circuit pattern formed on the first region, and a support member formed on the second region.
Abstract:
A printed wiring board has an insulative board having a first surface and a second surface on the opposite side of the first surface, a wiring formed on the first surface of the insulative board and having a pad and a conductive circuit contiguous to the pad, and a metal film formed on the pad. The pad is provided to mount an electronic component having a gold bump. The pad has a thickness which is greater than a thickness of the conductive circuit.
Abstract:
A layered heater is provided that includes at least one resistive layer having a resistive circuit pattern, the resistive circuit pattern defining a length, a width, and a thickness, wherein the thickness varies along the length of the resistive circuit pattern and/or the width of the resistive circuit pattern for a variable watt density. The present disclosure also provides layered heaters having a resistive circuit pattern with a variable thickness along with a variable width and/or spacing of the resistive circuit pattern in order to produce a variable watt density.
Abstract:
An FPCB and a method of manufacturing the same, in which an electrical signal-conductive portion of the FPCB is subjected to little stress so as not to be broken by fatigue in spite of repeated bending of the FPCB, thereby increasing the lifetime of the FPCB.
Abstract:
A pad includes a first mating section and a second mating section. The first mating section includes a first horizontal plane and a first inclined plane. The second mating section includes a second horizontal plane and a second inclined plane. The first mating section is a copper foil capable of being connected to a wire. The second mating section is made of insulating material. The first inclined plane and the second inclined plane are bonded together.