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:
A radio frequency circuit includes at least one dielectric substrate, a trench formed in the dielectric substrate, and an electrically continuous conductive material in the trench. The radio frequency circuit further may include a first dielectric substrate, a second dielectric substrate, with the trench being formed in the first and second dielectric substrates. A method of fabricating an electromagnetic circuit includes providing at least one dielectric substrate, machining a trench in the at least one dielectric substrate, and filling the trench with an electrically conductive material to form an electrically continuous conductor.
Abstract:
A capacitor in a multilayer printed circuit board 100 is described. The capacitor may include a via 114, 116 of a via-in-pad type and a dielectric mixture filled in the via of the via-in-pad type. The via may be disposed under an integrated circuit contact pad 112 of the multilayer printed circuit board. The dielectric mixture may include a nanoparticle-sized dielectric powder mixed with an adhesive material.
Abstract:
A method and electrical interconnect structure internal to a printed circuit board for the purposes of creating a reliable, high performing connection method between embedded component terminals, signal traces and or power/ground planes which may occupy the same vertical space as the embedded components, such as a capacitor or resistor. Further easing the assembly and reliability through the manufacturing process of said embedded component structures. In one structure castellated drilled, plated vias connect the trace or plane within the printed circuit board to the electrical terminals of the embedded component using a permanent and highly conductive attach material. In another structure, the trace or plane connect by selective side-wall plating, which surrounds the electrical terminal of the component This structure also uses a permanent and highly conductive attach material to electrically connect the component terminal to the plated side-wall and in a final embodiment the terminals are connected through a conductive attach material through a via in the z axis to a conductive pad.
Abstract:
An electronic device comprises a housing (2) having an outer face (11) and an inner face (12). A key is provided on the housing (2), which comprises a micro hole (21, 22) formed in the housing (2) and a conductive material (23, 24) extending within the micro hole (21, 22) to the outer face (11) of the housing (2). A sensor (6) is coupled to the conductive material (23, 24) to detect whether an object is brought into contact or out of contact with the micro hole (21, 22) at the outer face (11).