Abstract:
A multilayer substrate includes an insulating base member having a plurality of resin films, an electric element embedded in the insulating base member, and a spacer. The resin films are made of a thermoplastic resin and stacked and attached to each other. At least one resin film has a through hole for inserting the electric element. The one resin film further has a plurality of protruding members. One protruding member opposes to another one protruding member so that the one and the another one contact and sandwich the electric element. The spacer is arranged between the one resin film and an adjacent resin film and is disposed at a base portion of one of the protruding members.
Abstract:
A structure for reducing stress for vias and a fabricating method thereof are provided. One or more wires or vias in the thickness direction are enframed with the use of a stress block in a lattice structure to be isolated from being directly contacted with the major portion of insulating materials with a high coefficient of thermal expansion. Thus, the shear stress resulting from temperature loading can be blocked or absorbed by the stress block.
Abstract:
A circuit board is fixed to a housing including a boss-like fixing part by being fastened by a fixing tool. The circuit board includes a printed portion formed in a region that the circuit board contacts with the housing. The printed portion includes a lattice printed portion formed by silk screening on a periphery of a fixing hole through which the fixing tool is inserted, and a ring printed portion formed by silk screening on a periphery of the lattice printed portion. The lattice printed portion includes a non-printed region, and the ring printed portion includes no non-printed region.
Abstract:
A surface-mountable waveguide arrangement comprising a dielectric carrier material having a first main side and a second main side, the second side comprising a ground plane, and the first side being arranged to form a microwave circuit layout by means of metallization patterns on the respective sides. The microwave circuit layout comprises a footprint for a surface-mountable waveguide part, the waveguide part comprising an open side, a part of the footprint constituting a closing wall arranged for closing the open side. The waveguide part is arranged for being mounted to a footprint solder area comprised in the footprint, having an outer contour and corresponding to a solderable contact area on the waveguide part. A solderstop line is formed on the footprint, at least partly defining a border between the closing wall and the footprint solder area. The present invention also relates to a dielectric carrier.
Abstract:
A method of manufacture of an integrated circuit packaging system is provided including: providing a substrate; and placing a patterned layer over the substrate for substantially removing crying warpage from the substrate.
Abstract:
A self-assembly process is disclosed for integrating free standing microcomponents onto a template having a plurality of binding sites, an interconnect network, and trapping structures disposed downstream of the binding sites. The self-assembly is accomplished by flowing a fluid medium containing the microcomponents over the template such that some of the microcomponents are trapped at binding sites. The template may be simultaneously (or subsequently) heated to melt a binder such as a solder spot at each of the binding sites, and then cooled to connect the trapped microcomponents to the interconnect network. In one embodiment, removable blocking elements are disposed upstream of some of the binding sites, for example formed from photoresist. After assembling a first set of microcomponents, the blocking elements are removed, and a second set of microcomponents in a fluid medium are flowed over the template for assembly into the newly unblocked binding sites.
Abstract:
A method for forming a conductive post include: a) forming a liquid repellent portion having a thickness of 100 nm or less by disposing a liquid repellent material in a conductive post forming region on a conductive layer; b) forming an insulation layer having an opening in a region overlapping with the conductive post forming region by disposing a liquid including an insulation layer forming material on the conductive layer having the liquid repellent portion formed thereon and polymerizing the insulation layer forming material; c) disposing metal particulates in the opening; and d) heating the metal particulates at a fusing temperature of the metal particulates or higher so as to fusion bond the metal particulates to each other in order to form the conductive post, and to fusion bond the metal particulates and the conductive layer in order to couple the conductive post with the conductive layer.
Abstract:
When a surface-mount electronic part, which includes at least two mounting electrodes on an external underside thereof, is bonded to circuit terminals on a wiring board using solder, a protrusion, which is thicker than the circuit terminal, is provided on a surface of the wiring board facing the outer bottom surface of the electronic part to have the clearance between the mounting electrode and the circuit terminal that is not smaller than a predetermined value, so that the thickness of the solder between the mounting electrode and the circuit terminal is maintained to be large.
Abstract:
An active matrix substrate includes a first substrate and a driving integrated circuit chip mounted on the first substrate. A support member is provided between the active matrix substrate and the driving IC chip so as to be in contact with both the active matrix substrate and the driving IC chip.
Abstract:
A flexible printed circuit board includes a flexible base, a working trace region, and at least one reinforcement trace. The working trace region and the at least one reinforcement trace are formed on the flexible base. The working trace is formed by a number of working traces. In the flexible base, the at least one reinforcement trace is disposed at a periphery of the working trace region.