Abstract:
PROBLEM TO BE SOLVED: To provide a ceramic substrate having excellent connection reliability, and in which corrosion can be prevented at a connection terminal.SOLUTION: A ceramic substrate 10 includes a ceramic substrate body 13 having a substrate surface 11 and a substrate rear surface 12. A surface side terminal 31 is provided on the substrate surface 11 of the ceramic substrate body 13, and a rear side terminal 32 is provided on the substrate rear surface 12. The surface side terminal 31 and rear side terminal 32 are configured, respectively, to include a copper layer 41, and a coating metal layer 42 provided to cover the surface of the copper layer 41. Between the ceramic substrate body 13 and the copper layer 41 of each terminal 31, 32, an adhesion layer 43 composed of titanium and an intermediate layer 44 composed of molybdenum are provided. The adhesion layer 43 and intermediate layer 44 are set back from the side face 41a of the copper layer 41 in the substrate plane direction.
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer wiring board making it possible to mount a surface mount component having a narrow pitch, while increasing a wiring housing amount.SOLUTION: A multilayer wiring board includes: a first metal foil wiring layer having at least two layers, arranged on a side of a mounting face for mounting a surface mount component; a wire wiring layer having an insulation coated wire, arranged on a side opposite to the mounting face; and an inter-layer conduction hole electrically connecting the metal foil wiring on a surface of the first metal foil wiring layer to the metal foil wiring in an inner layer of the first metal foil wiring layer or the insulation coated wire of the wire wiring layer. A hole diameter of the inter-layer conduction hole varies in a plate-thickness direction of the multilayer wiring board.
Abstract:
PROBLEM TO BE SOLVED: To eliminate the use of a separate PSR process by preventing the deflection of a substrate during the manufacturing and after the manufacturing of a substrate and by having a function of a solder resist layer an by preventing the deflection of the substrate caused by a support. SOLUTION: In a manufacturing method, a circuit pattern 56 is formed on both side or single side copper-clad laminate plates at both faces of at a single face, a build-up layer 57 is laminated thereon, and then a solder resist layer 58 is formed on the upper face of the build-up layer 57. By this, a first circuit layer having via holes 54 and including the circuit pattern 56 is formed on one face, and on the other face, an insulation resin layer 50 formed with a second circuit layer including a connection pad for solder ball mounting protruded on the via hole 54, the build-up layer 57 including a large number of insulating layers and a large 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)2010,JPO&INPIT
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