The invention relates to a process to connect, by soldering, at least one electronic component (104, 204, 304, 404, 504) with a mounting plate (100, 200, 300, 400, 500), the mounting plate having at least one mounting plate contact surface (102, 202, 302, 402, 502) and the at least one electronic component having at least one component contact surface (105) corresponding to it, the at least one mounting plate contact surface being surrounded by a solder resist layer (101, 201, 301, 401, 501) that borders the at least one mounting plate contact surface, the process having the following steps: a) Applying solder paste (106, 206, 306, 406, 506) onto at least areas of the solder resist layer (101, 201, 301, 401, 501), minimally overlapping with the mounting plate contact surface (102, 202, 302, 402, 502) adjacent to the solder resist layer, b) Equipping the mounting plate with the at least one electronic component (104, 204, 304, 404, 504), the at least one component contact surface (105) at least partly covering the at least one mounting plate contact surface (102, 202, 302, 402, 502) corresponding to it; and c) Heating the solder paste (106, 206, 306, 406, 506) to produce a soldered connection between the mounting plate and the at least one component.

A printed wiring board includes a resin insulating layer, a conductor layer formed on a surface of the resin insulating layer, an outermost insulating layer formed on the resin insulating layer such that the outermost insulating layer is covering the conductor layer and has an opening extending to the conductor layer, and a metal post formed in the opening of the outermost insulating layer such that the metal post is protruding from the outermost insulating layer.

A printed circuit board includes an electronic component having a first land, and a printed wiring board having a second land soldered to the first land. The printed wiring board includes a first wiring pattern, a resist opening formed around the second land configured to expose at least part of the first wiring pattern to outside, and a second wiring pattern disposed at least a portion of a periphery of the resist opening. A heat capacity of the first wiring pattern is smaller than that of the second wiring pattern.

A wiring board includes an insulating substrate, at least one external electrode disposed on a first surface of the insulating substrate, and wiring that is disposed in the insulating substrate and that is electrically connected to the at least one external electrode. The wiring includes a portion where an extension direction of the wiring is inclined relative to the first surface of the insulating substrate.

A method for manufacturing a light-emitting module includes a step of providing a bonded board including a board including, on a first surface, a circuit pattern and wiring pads that are continuous with the circuit pattern and each have bottomed holes and light-emitting segments connected on a second surface of the board with an adhesive sheet interposed therebetween and including an array of light-emitting devices; a step of supplying electrically conductive paste inside the bottomed holes and on portions of the surface of the wiring pad around the bottomed holes through openings of a mask; and a step of performing thermal compression to harden the electrically conductive paste such that the thickness of the electrically conductive paste on the portions of the surface of the wiring pad is smaller than the electrically conductive paste at the timing of being disposed through the openings of the mask.

A printed circuit board includes an insulating layer, a circuit pattern on the insulating layer, and a surface treatment layer on the circuit pattern. The surface treatment layer includes a bottom surface having a width wider than a width of a top surface of the circuit pattern.

A ceramic electronic component that includes an electronic component body having a superficial base ceramic layer; a surface electrode on a surface of the electronic component body, a peripheral section of the surface electrode having an opening therein; and a covering ceramic layer covering the peripheral section of the surface electrode and the opening therein.

A ceramic electronic component that includes an electronic component body having a superficial base ceramic layer; a surface electrode on a surface of the electronic component body; and a covering ceramic layer covering a peripheral section of the surface electrode. The peripheral section of the surface electrode that is covered by the covering ceramic layer has a thin portion located on a central side of the surface electrode and which is thinner than a central section of the surface electrode, and a width of the thin portion is 20% or more of a width of the peripheral section of the surface electrode that is covered by the covering ceramic layer.

A printed circuit board includes a first chip component, a second chip component, and a printed wiring board. The first chip component and the second chip component each has a length L2 in the longitudinal direction. A relationship of 0.894L2/L11.120 is satisfied, where L1 represents a length of the first opening in the longitudinal direction. A relationship of 0.894L2/L41.120 is satisfied, where length L4 represents a length of the second opening in the longitudinal direction. A relationship of 0.183L.sub.OW/L.sub.iA0.309 is satisfied, where L.sub.iA represents a length of the first land in the longitudinal direction, and L.sub.OA represents a thickness of solder on an end surface of the first electrode. A relationship of 0.183L.sub.OB/L.sub.iB0.309 is satisfied, where L.sub.iB represents a length of the second land in the longitudinal direction, and L.sub.OB represents a thickness of solder on an end surface of the second electrode.

A portable communication device is provided that includes a display including a display area and a connecting area extending from one side of the display area; a back panel disposed on a rear surface of the display, the back panel including an opening formed therein; a flexible printed circuit board (FPCB) connected with the connecting area; and a biometric sensor electrically coupled with the FPCB, with the connecting area being housed and bent within the portable communication device such that the biometric sensor is placed under the opening.