Abstract:
PROBLEM TO BE SOLVED: To provide a component built-in printed-wiring board having high connection reliability. SOLUTION: The component built-in printed-wiring board is provided, where it comprises a base 11 having a component packaging surface, a circuit component 20 packaged on the component packaging surface of the base 11, a stress relaxation material 40 for covering the circuit component 20, and other members 13 laminated on the base 11 via an insulating layer 12 for covering the stress relaxation material 40. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a printed board with built-in capacitor providing a capacitance having a high capacity by forming a long-sized built-in capacitor in an insulating layer and being capable of freely designing the capacity of the capacitance, and to provide a manufacturing method for the printed board. SOLUTION: A dielectric having a length longer than a width and being formed in a specified length, and the built-in capacitor having a first electrode and a second electrode formed on both side walls of the dielectric respectively in the longitudinal direction of the dielectric, are contained in the insulating layer. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a printed circuit board which can enhance solder joint reliability, and a semiconductor package module using it. SOLUTION: A printed circuit board for a semiconductor package module comprises: a multilayer printed circuit board having a laminated structure with alternating insulating layers and printed circuit patterns; a first terminal which is a portion of one printed circuit pattern exposed to the outside of the printed circuit board and is to be connected to solder balls of a semiconductor package; a second terminal which is a portion of one printed circuit pattern exposed to the outside of the printed circuit board and has a function to be connected to another printed circuit board; and a buffer layer made of a photosensitive material, which functions as an insulating layer formed under the first terminal and can absorb the stress generated by the difference between the thermal expansion coefficient of the semiconductor package and that of the first terminal. A semiconductor package module has the printed circuit board and the semiconductor package mounted on the printed circuit board. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To enhance flexibility of design, by electrically connecting different dielectric bodies in the direction of sheet principal plane in a multilayer ceramic substrate, to form the dielectric bodies in a required size only in required portion, in order to make the multilayer ceramic substrate compact, and to allow the use of a variety of dielectric bodies. SOLUTION: The multilayer ceramic substrate is made by stacking a plurality of ceramic substrates, including different material composite ceramic substrates which are such that a second ceramic substrate is set in through-holes of a first ceramic substrate, and the front and rear surfaces are flattened. Conductor layers are formed at such portions of the interfaces of the different material composite ceramic substrates straddling the boundaries, between the first ceramic substrate and the second ceramic substrate. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a power circuit which is of reduced size and of increased power density and has higher flexibility in formation of a safe distance between a primary circuit and a secondary circuit. SOLUTION: The power circuit 100 has at least one transformer 106 connected with the primary circuit 102 and the secondary circuit 104. The power circuit 100 is manufactured as follows: the primary circuit 102 and the secondary circuit 104 are mounted on circuit carriers 110, 114, and 118 and a lead frame 122. The circuit carriers 110, 114, and 118 and the lead frame 122 are mechanically and electrically joined with each other. The circuit carriers and the lead frame are disposed on at least two different planes and preferably disposed so that they are in parallel with each other or they cross each other. COPYRIGHT: (C)2005,JPO&NCIPI