Abstract:
A method of manufacturing a multilayer wiring substrate is provided. A foil of a metal-foil-clad resin insulation material is brought into contact with a foil of a metal-foil-clad support substrate. A peripheral edge portion of the resin insulation material exposed as a result of removal of a peripheral edge portion of the foil is adhered to the foil of the support substrate. A plurality of conductor layers and a plurality of resin insulation layers are laminated so as to obtain a laminate structure having a wiring laminate portion, which is to become the multilayer wiring substrate. The laminate structure is cut along a boundary between the wiring laminate portion and a surrounding portion, and the surrounding portion is removed. The wiring laminate portion is separated from the support substrate along the boundary between the two foils.
Abstract:
A plurality of openings are formed in a resin insulation layer on a top surface side of a wiring laminate portion, and a plurality of openings are formed in a resin insulation layer on a bottom surface side thereof. A plurality of connection terminals are disposed to correspond to the openings. Peripheral portions of terminal outer surfaces of the connection terminals are covered by the resin insulation layer on the top surface side, and peripheral portions of terminal outer surfaces of the connection terminals are covered by the resin insulation layer on the bottom surface side. Each of the second-main-surface-side connection terminals has a concave portion at the center of the terminal outer surface, and the deepest portion of the concave portion is located on the interior side in relation to the peripheral portion of the terminal outer surface.
Abstract:
To provide a multilayer wiring substrate in which the connection reliability of via conductors is enhanced, via holes are formed in a resin interlayer insulation layer which isolates a lower conductor layer from an upper conductor layer, and via conductors are formed in the via holes for connecting the lower conductor layer and the upper conductor layer. The surface of the resin interlayer insulation layer is a rough surface, and the via holes open at the rough surface of the resin interlayer insulation layer. Stepped portions are formed in opening verge regions around the via holes such that the stepped portions are recessed from peripheral regions around the opening verge regions. The stepped portions are higher in surface roughness than the peripheral regions.
Abstract:
Disclosed is a manufacturing method of a multilayer wiring board. The multilayer wiring board includes an outer resin insulation layer made of an insulating resin material, containing a filler of inorganic oxide and having an outer surface defining a chip mounting area to which an electronic chip is mounted with an underfill material filled in between the outer resin insulation layer and the electronic chip and holes through which conductor parts are exposed. The manufacturing method includes a hole forming step of forming the holes in the outer resin insulation layer by laser processing, a desmear treatment step of, after the hole forming step, removing smears from inside the holes of the outer resin insulation layer, and a filler reducing step of, after the desmear treatment step, reducing the amount of the filler exposed at the outer surface of the outer resin insulation layer.
Abstract:
A wiring substrate assembly includes a resin wiring substrate and a reinforcement member. The resin wiring substrate does not have a core substrate, and includes a substrate main surface, a substrate back surface, a laminate structure comprised of resin insulation layers and conductive layers, and connection terminals disposed on the substrate main surface, to which a chip component is connectable. The reinforcement member is bonded to the substrate main surface and defines an opening portion extending through the reinforcement member so as to expose the main-surface-side connection terminals. The reinforcement member comprises a composite material including a resin material containing an inorganic material.
Abstract:
A multilayer wiring substrate includes a laminate structure in which resin insulation layers and conductor layers are alternately laminated. The resin insulation layers include first-type resin insulation layers, and second-type resin insulation layers, each of which contains an inorganic material in a larger amount and is smaller in thermal expansion coefficient as compared with first-type resin insulation layers. On a cross section of the laminate structure taken along a thickness direction thereof, the ratio of a total thickness of the second-type resin insulation layers located in an area A2 to a thickness corresponding to the area A2 is greater than the ratio of a total thickness of the second-type resin insulation layers located in an area A1 to a thickness corresponding to the area A1. The laminate structure is warped such that the laminate structure is convex toward the side where the second main face is present.
Abstract:
To provide a multilayer wiring substrate which can prevent migration of copper between wiring traces to thereby realize a higher degree of integration, a solder resist layer 25 having a plurality of openings 35, 36 is disposed on a top surface 31 side, and IC-chip connection terminals 41 and capacitor connection terminals 42 are buried in an outermost resin insulation layer 23 in contact with the solder resist layer 25. Each of the IC-chip connection terminals 41 and the capacitor connection terminals 42 is composed of a copper layer 44 and a plating layer 46 covering the outer surface of the copper layer 44. A conductor layer 26 present at the interface between the solder resist layer 25 and the resin insulation layer 23 is composed of a copper layer 27 and a nickel plating layer 28 covering the outer surface of the copper layer 27.
Abstract:
A multilayer wiring substrate includes first principal surface side connection terminals arranged on a first principal surface of a stacked configuration; wherein, the first principal surface side connection terminals include an IC chip connection terminal, and a passive element connection terminal; the IC chip connection terminal is located in an opening formed in a resin insulating layer of an uppermost outer layer; the passive element connection terminal is formed of an upper terminal part formed on the resin insulating layer, and a lower terminal part located in an opening formed at a portion of an inner side of the upper terminal part in the resin insulating layer; and, wherein an upper face of the upper terminal part is higher than a reference surface, and an upper face of the IC chip connection terminal and the lower terminal part are identical in height to or lower in height than the reference surface.
Abstract:
A plurality of openings are formed in a resin insulation layer on a top surface side of a wiring laminate portion, and a plurality of openings are formed in a resin insulation layer on a bottom surface side thereof. A plurality of connection terminals are disposed to correspond to the openings. Peripheral portions of terminal outer surfaces of the connection terminals are covered by the resin insulation layer on the top surface side, and peripheral portions of terminal outer surfaces of the connection terminals are covered by the resin insulation layer on the bottom surface side. Each of the second-main-surface-side connection terminals has a concave portion at the center of the terminal outer surface, and the deepest portion of the concave portion is located on the interior side in relation to the peripheral portion of the terminal outer surface.
Abstract:
A multilayer wiring substrate has a multilayer wiring laminate portion in which a plurality of resin insulation layers made primarily of the same resin insulation material, and a plurality of conductive layers are laminated alternately. A plurality of first-main-surface-side connection terminals are disposed on one side of the laminate structure where a first main surface thereof is present, and a plurality of second-main-surface-side connection terminals being disposed on an other side of the laminate structure where a second main surface thereof is present. The plurality of conductive layers are formed in the plurality of resin insulation layers and interconnected by means of via conductors whose diameters increase toward the first main surface or the second main surface. The plurality of first-main-surface-side connection terminals comprising at least two types of terminals for connection of different articles-to-be-connected. Top surfaces of the plurality of first-main-surface-side connection terminals differ in height according to types of the articles-to-be-connected.