Abstract:
Resin-sealed surface mounting type electronic parts which are formed in such a way that an electronic part element (5) is mounted on a resin-made wiring board (1) and a sealed area having a cavity housing the element (5) is formed by bonding a lid member to the board (1) so as to cover the element (5), and then side-face electrodes (21) are formed in through conductive grooves provided inside the bonding surface of the cap member on the board (1). Plated layers in the through conductive grooves have conductors (10 and 11) on the upper and lower surfaces of the board (1) each constituted of two or more kinds of metallic layers containing a plated gold layer (13) formed as the uppermost layer and a plated copper layer (12) and connected to the peripheral edges of the conductive grooves. On the upper conductor (10), however, only the plated copper layer (12) is formed and the other plated layers including the gold layer (13) are not formed on the conductor (10) so as to improve the reliability of the adhesion between the board (1) and cap member. Therefore, the reliability of the adhesion between the board (1) and the cap member for forming the sealed area having a cavity housing the element (5) is improved and the reliability of the airtight sealing of the element (5) is improved.
Abstract:
The object of the present invention is to provide a laminated circuit board with electronic components buried therein wherein the laminated circuit board may assure excellent reliability of electrical connections and high mechanical strength even with electronic components mounted in high density. It comprises a substrate (1001) on which a land disposed on one main surface thereof is connected and fixed by solder (1007) to integrated circuit (1005) or the like, and a sheet (1011) laminated on the upper surface of the substrate (1001) and also provided with a filling portion by fluid resin formed by clearance (1008) at the outer periphery of integrated circuit (1005) or the like, wherein the sheet (1011) maintains its shape by woven or non-woven cloth having a hole (1012) in which integrated circuit (1005) or the like is buried, and the woven or non-woven cloth is impregnated with resin (1016) having heat fluidity and is thermally compressed. Thus, the electrical and mechanical connections between the laminated circuit board and electronic component can be enhanced in reliability.
Abstract:
Ein Verfahren zur Kontaktierung der Leiterbahnen einer Schaltungsplatine (1) mit den Leiterbahnen eines Bauteiles (10) in MID-Technologie umfasst folgende Schritte:
Auf dem Nutzen, aus dem die Schaltungsplatine gewonnen wird, werden die Leiterbahnen mindestens bis zum Rand der Schaltungsplatine geführt. Längs dieses Randes wird der Nutzen im Bereich der Leiterbahnen mit Durchgangsbohrungen (6d) versehen. Die Durchgangsbohrungen werden galvanisch durchkontaktiert. Die aus dem Nutzen herausgetrennte Schaltungsplatine wird relativ zu dem MID-Bauteil so positioniert, dass die aneinander grenzenden Leiterbahnen von Schaltungsplatine und MID-Bauteil miteinander verlötbar sind.
Zweckmäßig erhält die Schaltungsplatine deckungsgleich zu den an ihrem Rand endenden Leiterbahnen rückseitig elektrische Kontaktierungsflächen (6b), welche über metallisierte und durchkontaktierte Bohrungen mit den vorderseitigen Leiterbahnen (5) elektrisch verbunden sind.
Abstract:
Laminar electrical devices, in particular circuit protection devices, contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes. This permits connection to both electrodes from the same side of the device. It also makes it possible to carry out the steps for preparing such devices on an assembly which corresponds to a number of individual devices, with division of the assembly as the final step.
Abstract:
Resin-sealed surface mounting type electronic parts which are formed in such a way that an electronic part element (5) is mounted on a resin-made wiring board (1) and a sealed area having a cavity housing the element (5) is formed by bonding a lid member to the board (1) so as to cover the element (5), and then side-face electrodes (21) are formed in through conductive grooves provided inside the bonding surface of the cap member on the board (1). Plated layers in the through conductive grooves have conductors (10 and 11) on the upper and lower surfaces of the board (1) each constituted of two or more kinds of metallic layers containing a plated gold layer (13) formed as the uppermost layer and a plated copper layer (12) and connected to the peripheral edges of the conductive grooves. On the upper conductor (10), however, only the plated copper layer (12) is formed and the other plated layers including the gold layer (13) are not formed on the conductor (10) so as to improve the reliability of the adhesion between the board (1) and cap member. Therefore, the reliability of the adhesion between the board (1) and the cap member for forming the sealed area having a cavity housing the element (5) is improved and the reliability of the airtight sealing of the element (5) is improved.
Abstract:
An edge-mountable integrated circuit (IC) package (100) and methods of manufacturing and assembling the same onto a printed wiring board (PWB) (130). In one embodiment, the package (100) includes: 1) a substrate (110) having a major surface (111) and a substantially planar edge (115) and 2) a conductive coating (120) having a first region (121) located on a portion of the major surface (111) and a second region (122) located on a portion of the substantially planar edge (115), the second region (122) being substantially planar to allow the second region (122) to be reflow soldered to the adjoining printed wiring board PWB (130).
Abstract:
The invention relates to a method and a device for interconnecting electronic components in three dimensions. In order to reduce the stray capacities between the connections and the shielding (304) of the device, metallized (42) grooves (40, 41) are cut into the block (3') of stacked circuits, the conductors (21) of said circuit being set back from the corresponding face (302) of the block. Said grooves cut into the connection conductors (21). The assembly is then coated with resin (303) and shielded by metallization (304). The invention is especially suitable for producing more compact three-dimensional electronic systems.
Abstract:
The invention relates to a method of improving the manufacturing safety of weld joints (7) between a ceramic support (1) and a printed-circuit board (10). Said method consists of the deposition of a first metallization layer (5) resistant to alloy breakdown on the ceramic support (1), followed by the imprinting of a second metallization layer (6), which enhances wetting behaviour, on the first metallization layer (5). In this way the thickness of the overall metallization layer (5, 6) can be increased in the area of the edges (8) of a weld joint (7). The resulting raised solder ring in turn permits the fully automatic optical control of the weld joint (7).
Abstract:
An electronic part element 5 is mounted on a resin wiring substrate 1, a cover member 1 is bonded to the wiring substrate 1 so as to cover the electronic part element 5 thereby to constitute an encapsulation region in which the electronic part element 5 is housed and which has a cavity inside, and a side electrode 21 is formed of an electrically conductive through groove provided in a cover-member-bonding surface on said wiring substrate. A plating layer inside said electrically conductive through groove is constituted of at least two metal layers including an Au plating layer 13 as an uppermost layer and a Cu plating layer 12 and has conductors 10 and 11 connected to circumferential peripheries of said electrically conductive through groove on upper and lower surfaces of said wiring substrate 1, while said Cu plating layer 12 alone is formed on the conductor 10, and the other plating layers including the Au plating layer 13 are not formed, on the upper surface for improving the reliability of bonding. The reliability of bonding of the resin wiring substrate and the cover member which are constituting the encapsulation region surrounding the electronic part element and having a cavity inside is improved, and the reliability of air-tight sealing is improved.