Abstract:
A laminated substrate structure composed of a plurality of dielectric layers and a plurality of circuit layers stacked with each other. Each of the dielectric layers has a plurality of via studs, and the circuit layers are electrically coupled with each other through the via studs. The laminated substrate structure of the present invention is characterized by adopting the embedded structure landless design that provides high reliability and better adherence. The present invention also provides a laminated substrate manufacture method. The dielectric layers having the patterned circuit and the dielectric layers having the via holes are formed first, and after the dielectric layers having the patterned circuit and the dielectric layers having the via holes are formed, they are aligned and laminated synchronously to complete the manufacture of the laminated substrate.
Abstract:
The printed circuit board is produced without soldering lands around the contacting, supporting or interconnecting holes of a simple faced, double-faced or multilayer circuit.The inner wall of the hole is covered with a copper layer which extends only until the free surfaces of the naked board, i.e. levels that surface, or does not fully extend until this level. The said layer is covered with a tin-lead metallization layer which services as a soldering link element. The solder mounts towards the wire or pin of the soldered component but does not touch nor spoil the free, insulating surface of the support.One necessary condition of the making process of the board is the precise, clean, proper and sharp drilling of the holes.
Abstract:
A multi-layer printed circuit board (21) has through holes (15-17) which are plated without conventional pads. This avoids circuit board rejections which would occur from cosmetic defects resulting from incomplete solder coverage of the pads and from pad lifting. In order to provide the through holes (15-17) with an adequate supply of solder during solder operations, wicks (45) are provided for each through hole (15-16) which is isolated from circuit traces (37, 38) on the exterior surface (33) of the printed circuit board (21). If the through hole (17) is connected to a circuit trace (38) on the exterior surface (33), then a connecting run (48) is used to provide wicking action in lieu of a tab (45).
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit substrate including a pad and a conductive block which are formed integrally with each other. SOLUTION: This circuit substrate includes: a base layer 110; a patterned conductive layer 120 having an inner pad 122 and disposed on the base layer; a dielectric layer 130 disposed on the base layer and covering the patterned conductive layer; an outer pad 144 disposed on the dielectric layer; and a conductive block 142 penetrating the dielectric layer to electrically connect the outer pad to the inner pad; wherein the outer pad 144 and the conductive block 142 are integrally formed. After the surface treatment of the outer pad 144, a metal passivation layer 190 is formed on the outer pad 144. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent a deflection of a substrate during and after the manufacturing thereof, and to obviate a separate PSR process by causing a support to prevent the deflection of the substrate and to have a function of a solder resist layer. SOLUTION: In a manufacturing method, a circuit pattern (56) is formed on both sides or one side of a copper-clad laminate plate, and after laminating a build-up layer (57) thereon, a solder resist layer (58) is formed on the top surface of the build-up layer (57). Thus, an insulating resin layer (50) having via holes (54) and in which a first circuit layer including the circuit pattern (56) is formed on one surface and a second circuit layer including a solder ball mounting connection pad projecting over the via hole (54) is formed, the build-up layer (57) including a number of insulating layers and a number of circuit layers formed on the first circuit layer, and the solder resist layer (58) formed on the outermost layer of the build-up layer (57) are included. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a printed circuit board which can be used to increase the density of circuit patterns as the method can provide electrical connection between circuit patterns and vias without using lands. SOLUTION: The method of manufacturing the printed circuit board includes: forming an interlayer connector on a first carrier, stacking an insulation layer on the first carrier such that the interlayer connector is exposed, removing the first carrier, and forming a circuit pattern on the insulation layer such that the circuit pattern is electrically coupled with the interlayer connector. COPYRIGHT: (C)2010,JPO&INPIT