Abstract:
Circuit board (1) and method of producing thereof, the circuit board having a cavity for microstrip to waveguide transition means (2) defined by a hollow space on the walls of which a protection layer (21) is provided. A microelectronic substrate (33) is placed upon an adhesive film (31) adhered onto a surface of the circuit board (1), the adhesive film being pre-cut in selected areas (32) thereof providing openings therethrough. A metal layer (5) is disposed on the resulting structure, wherein a selected part (51) of the metal layer (5) present on a surface of microelectronics substrate (33), facing the hollow space defined by the cavity for microstrip to waveguide transition means (2) is removed.
Abstract:
A circuit carrier assembly includes a plurality of substrates directly secured together by an electrically conductive securing substance. In one example, the securing substance is a conductive epoxy. In another example, the electrically conductive securing substance is solder. Still another example includes a combination of solder and conductive epoxy. A non-conductive epoxy provides further mechanical connection and thermal conductivity between the substrates while also electrically isolating selected portions of the substrates in one example. The electrically conductive securing substance not only mechanically secures the substrates together and provides thermal conductivity between the substrates, which increases the thermal capacitance of the assembly, but also establishes at least one electrically conductive path between the substrates.
Abstract:
A resin-sealed electronic circuit apparatus capable of maintaining a high heat-dissipating property and packaging density in applications where high hermetic-sealing property and durability are required. The electronic circuit apparatus comprises at least two wiring circuit boards (12, 13) on which electronic components are mounted. The wiring circuit boards (12, 13) are fixed to a heat sink (14) having a high heat conductivity via an adhesive (9, 10). The entirety of the wiring circuit boards (12, 13) and heat sink (14), as well as a part of an external connection terminal (8) are hermetically sealed and integrally molded by a thermosetting resin composition (7). The electronic circuit apparatus is small and highly reliable and can be provided at low cost.
Abstract:
Die elektronischen Halbleiterbauelemente oder Hybridbauelemente (1) der mehrschichtigen gedruckten Schaltungsplatte sind zur Verbesserung der Wärmeableitung und zur Erzielung einer grösseren Packungsdichte gehäuselos unmittelbar auf einer gemeinsamen metallischen Trägerplatte (2) befestigt. Die elektronischen Bauelemente (1) sind jeweils in fensterartigen Aufnahmeöffnungen (8) einer ersten an der Trägerplatte (2) befestigten und mit Leiterschichten (5,9,10,11) versehenen Leiterplatte (6) angeordnet und mit Leitern (4) verbonded. Ein Teil der elektrischen Verbindungen der Schaltungsplatte befindet sich in einer die erste Leiterplatte (6) überdeckenden zweiten, mit einer weiteren Leiterschicht (121 versehenen Leiterplatte (7), durch welche die Aufnahmeöffnungen (8) verschlossen werden. Die einzelnen Leiterschichten (5,9 bis 12) sind mittels durchmetallisierter Verbindungs- und/oder Sacklochbohrungen (14, 14',15) elektrisch miteinander verbunden.
Abstract:
The present invention relates to a stripline arrangement (10’) comprising a number of stripline layers each comprising a laminate layer (1A, 1B) and conducting layers (2A, 2B, 3A, 3B) provided on each of said laminate layers (1A, 1B), said conducting layers (2A, 2B, 3A, 3B) each comprising a conductive pattern, RF signal (microwave) input and output ports respectively, and an interconnecting arrangement (5) for interconnecting said layers. At least two of said stripline layers are arranged such that a given overlapping zone (L’) is provided between each other facing conducting layers (2A, 2B) of said striplines layers, said interconnecting arrangement (5) comprising a bonding arrangement provided between adjacent and one another facing and overlapping conducting layers (2A, 2B). Connectors (4A, 4B) are provided substantially perpendicularly with respect to an extension plane of the respective stripline layers and crossing said laminate layers (1A, 1B) and conducting layers for, in said overlapping zone, providing contact between the adjacent conducting layers of adjacent stripline layers.