Abstract:
A printed wiring board comprising a circuit board (6) having a conductor circuit (5) and a through-hole (60), and a junction pin (1) inserted in the through-hole. The junction pin is made of a material which does not melt at a heating temperature in joining the junction pin to a counterpart pad (81). The junction pin includes a junction top portion (11) which is greater than the aperture diameter of the through-hole and becomes a junction part with the counterpart pad, and a leg portion (12) of a size enabling insertion into the through-hole. The leg portion is inserted in the through-hole and joined with the through-hole by a conductive material such as a solder material (20). In place of the junction pin, a junction ball of a substantially spherical shape may be joined by the conductive material.
Abstract:
A printed circuit assembly (10) and method of making the same utilize in one embodiment an adhesive layer (40) including a plurality of non-conductive "gauge particles" (44) disposed within a non-conductive adhesive (42). When the adhesive layer (40) is disposed between opposing printed circuit layers (20, 30) (be they insulating substrates, conductive layers, or other layers), individual gauge particles (44) are interposed or sandwiched at various points between the layers such that the diameters of the particles control the layer separation throughout overlapping areas thereof, thereby permitting careful control over layer separation. A printed circuit assembly and method of making the same utilize in another embodiment an interlayer interconnecting technology incorporating conductive posts that are deposited on one of a pair of contact pads formed on opposing printed circuit boards and thereafter bonded to the other in the pair of contact pads during lamination. Fusible material may be utilized in the conductive posts to facilitate mechanical bonding to a contact pad, and the posts project through a dielectric layer disposed between the printed circuit boards, thereby forming the electrical connections between the boards at discrete locations.
Abstract:
An electronic circuit module and its manufacturing method are provided to reduce the size, to decrease fabrication costs and to obtain an excellent heat radiating capability by using an improved arrangement of first and second circuit boards. An electronic circuit module comprises a semiconductor substrate, a semiconductor IC(Integrated Circuit) part on the substrate and a passive element part. The electronic circuit module further includes first and second circuit boards. At least one out of the semiconductor IC part and the passive element part is loaded on part mount surfaces of the first and the second circuit boards(1,2). The part mount surfaces of the first and the second circuit boards are arranged opposite to each other.
Abstract:
전자 부품을 탑재하기 위한 탑재부를 구비하는 절연 기판 및 상기 절연 기판의 저면상에 배치된 히트싱크판을 포함하는 전자 부품 탑재 기판에 있어서, 상기 절연 기판이 신호 또는 파우워용 배선 패턴, 접지 패턴 및 접지공을 구비하며, 상기 접지 패턴의 전기적 연결을 위해 상기 접지공은 그 내벽 상에 금속 도금막이 구비되어 있고, 상기 히트싱크판과의 전기적 연결을 위해 상기 접지공의 내부에는 땜납이 채워져 있는 전자 부품 탑재 기판이 개시되어 있다.
Abstract:
PURPOSE: To prevent an increase in electric resistance of a wiring formed on a board, even if it has high wiring density. CONSTITUTION: A wiring board 7 is press-bonded to a bard expansion 2c by an ACF 6b, board terminals 21 made of ITO on the wiring expansion 2c are conductively connected to first terminals formed on the backside of the wiring board 7 having second terminals 27 on its surface, and the second terminals 27 make electrical continuity to the first terminals on the backside via through- holes. A wiring pattern on the wiring board 7 is formed of a material having lower electric resistance than that of an ITO forming the board terminals 21, thus suppressing wiring resistance on the board expansion 2c.
Abstract:
PURPOSE: A ball grid array(BGA) semiconductor package is provided to decrease manufacturing cost, by obviating the necessity of an additional unit for precise alignment when a conductive ball is placed on a substrate for packaging. CONSTITUTION: A semiconductor chip(91) is adhered to a recess(53) formed in the center of a lower substrate(51). A wire(93) connects one end of an interconnection(59) formed on the upper surface of the lower substrate with the semiconductor chip. An encapsulating member(97) surrounds the upper surface of the recess, the wire and the semiconductor chip. A lower penetration hole(55) of which the upper portion is broader than the lower portion, is formed in the outside of the recess. A conductive ball is disposed in the lower penetration hole. An upper penetration hole(75) of which the upper portion is narrower than the lower portion, is formed in a position corresponding to the conductive ball. An upper substrate(71) having the upper penetration hole is adhered to the lower substrate.
Abstract:
A semiconductor package with an improved solder joint reliability and a manufacturing method thereof are provided to enhance thermal and mechanical shock characteristics of the semiconductor package itself by using a solder connection part. A semiconductor package includes a PCB(Printed Circuit Board) on which a PSR(Photo Solder Resist) is coated, an adhesive member, a semiconductor chip and a solder connection part. The PCB includes a plurality of metal line layers(107) and a plurality of through holes. The adhesive member(104) is attached on an upper surface of the PCB. The semiconductor chip(102) is electrically connected with the metal line layers of the PCB. The semiconductor chip is mounted on the adhesive member. The solder connection part(110) is filled in the through hole.
Abstract:
A vent assembly (50) for an electronic control module (28) is provided. The vent assembly (50) may be adheringly coupled to a printed circuit board (38). The vent assembly (50) being adapted to prevent the ingress of moisture and permit the egress of certain gases.