A circuit board (10, 10, 10) includes at last one insulating substrate layer (SL1, SL2, SL3, SL4, SL5) and a plurality of electrically conductive copper coats (C1, C2, C3) arranged on the at least one insulating substrate layer (SL1, SL2, SL3, SL4, SL5), wherein at least one of the electrically conductive copper coats (C1, C2, C3) is coated at least on both sides with a layer (HSI, HS2, HS3) made of a material for inhibiting electromigration, wherein on a layer (HS1, HS2) made of a material for inhibiting electromigration a further metal layer (M1, M2, M3, M3) is provided, which is in turn coated with a further layer (HS3, HS3) made of a material for inhibiting electromigration.

A multilayer circuit board comprises an inner circuit board, a tin layer, at least one outer circuit board, and a solder mask. The inner circuit board comprises at least one first mounting region and at least one second mounting region. The tin layer is formed on a surface of the inner circuit board except the first mounting region connecting the outer circuit board. The outer circuit board comprises at least one first opening to expose the first mounting region and at least one second opening to expose a portion of the tin layer covering the second mounting region. The inner circuit board, the tin layer, and the outer circuit board together form a middle structure. The solder mask covers the middle structure except the portion and the first mounting region. A treatment layer is formed on the first mounting region.

A solder resist includes a lower layer including a first resin and particles, and an upper layer including a second resin and formed on the lower layer. The particles are one kind selected from a group of inorganic particles, and the upper layer is formed such that the upper layer does not contain any kind of particles belonging to the group of inorganic particles.

A component carrier and a method for manufacturing the same are disclosed. The component carrier includes an electrically conductive layer structure and an overhanging end. A first surface finish is formed on a first surface portion of the electrically conductive layer structure. Furthermore, the component carrier further includes a second surface finish on a second surface portion of the electrically conductive layer structure connected to the first surface finish and extending under the overhanging end.

A manufacturing method for a ceramic sintered compact substrate including preparing a ceramic substrate, bonding dry films to a first surface and a second surface of the ceramic substrate, performing exposure and development, performing etching or blasting through the dry films formed into a predetermined pattern, forming a first recessed portion recessed relative to a first flat surface portion of the first surface and a second recessed portion recessed relative to a second flat surface portion of the second surface, peeling off the dry films, disposing a metal paste, and firing the metal paste to obtain a metal member. In the method, before the first recessed portion and the second recessed portion are formed, a through hole penetrating through the ceramic substrate is formed , and the metal paste is disposed in the first recessed portion, the second recessed portion, and the through hole.

A circuit board according to an embodiment includes: an insulating layer; a conductive pad disposed on the insulating layer, a plating lead-in wire that is disposed on the insulating layer and is connected to the conductive pad; and a solder resist layer that is disposed on the insulating layer and includes a first opening overlapping the conductive pad and a second opening spaced apart from the first opening. The plating lead-in wire extends from the conductive pad to one side wall of the second opening, and a second portion of the insulating layer overlapping the second opening is thinner than a first portion of the insulating layer overlapping the first opening.

A light emitting device package can include a base including a flat top surface; first and second electrical circuit components disposed on the flat top surface of the base; a light emitting diode disposed on the flat top surface of the base, an optical member comprising a light transmissive material; and a guiding member disposed on the flat top surface of the base and having a closed loop shape for guiding the optical member, in which the first and second electrical circuit components respectively include first and second portions disposed between the flat top surface of the base and a bottom surface of the guiding member, the first electrical circuit component includes a first extension portion that extends from the first portion to a first location outside of an outer edge of the guiding member in a first direction, and a second extension portion that extends from the first extension portion to a second location outside of the outer edge of the guiding member in a second direction different than the first direction, the first direction and the second direction being disposed on a horizontal plane parallel to the flat top surface of the base.

A printed wiring board includes a support plate, a laminate formed on the support plate and including first conductor pads on first surface side of the laminate and first via conductors on second surface side of the laminate, and a solder resist layer interposed between the plate and the laminate and having openings formed such that the openings are exposing the first pads. The laminate has first surface on the first surface side and second surface on the second surface side on the opposite side and includes a first resin insulating layer forming the second surface of the laminate, and the first conductors are formed through the first insulating layer such that the first vias are tapering from the first surface side toward the second surface side of the laminate and have end surfaces recessed from the second surface of the laminate on the second surface side of the laminate.

A printed wiring board includes a support plate, and a build-up wiring layer including resin insulating layers and conductor layers and having a first surface and a second surface on the opposite side with respect to the first surface such that the support plate is positioned on the first surface of the build-up wiring layer. The resin insulating layers in the build-up wiring layer include a first resin insulating layer that forms the second surface of the build-up wiring layer, and the build-up wiring layer includes first conductor pads embedded in the first resin insulating layer such that each of the first conductor pads has an exposed surface exposed from the second surface of the build-up wiring layer.

A membrane circuit structure with function expandability is provided. The membrane circuit structure includes a substrate, a lower circuit layer and a covering layer. The substrate includes a first region and at least one second region. The at least one second region is arranged near the first region. The lower circuit layer is printed on the first region. The lower circuit layer is made of a first conductive material. The covering layer is electroplated on a portion of a surface of the lower circuit layer. The covering layer is made of a second conductive material. At least one expansion line is welded on the corresponding second region, and electrically connected with the covering layer and a corresponding function-expanding unit.