Abstract:
An ovenized oscillator package including at least a heater and a crystal package mounted on opposite sides of a circuit board. Vias extend through the body of the circuit board to transfer heat from the heater to the crystal package. Layers of thermally conductive material extend through the body of the circuit board and are in thermally coupled relationship with the vias for spreading heat throughout the circuit board and other elements mounted thereon.
Abstract:
[Object] To provide a highly reliable circuit board which can be used for a long period of time and an electronic apparatus including this circuit board and an electronic component mounted thereon. [Solution] The circuit board includes a ceramic sintered body (11) and a metal wiring layer (13) provided on at least one primary surface (11a) thereof with a glass layer (12) interposed therebetween, and when the cross section of the circuit board perpendicular to the primary surface (11a) of the ceramic sintered body (11) is viewed, the ratio of the length of an interface (15) between the glass layer (12) and the metal wiring layer (13) to a length (12a) of the glass layer (12) in a direction along the primary surface (11a) is 1.25 to 1.80. As a result, good heat dissipation characteristics can be obtained, and the metal wiring layer (13) is not likely to be peeled away from the ceramic sintered body (11) due to operation of an electronic component (21) and/or cooling/heating cycles performed by repeated on-off operations thereof, so that a highly reliable circuit board which can be used for a long period of time can be provided.
Abstract:
A circuit board assembly (10) has a flat coil element (13) mounted on a circuit board (11) so that an electric power loss is not generated even when the flat coil element (13) is mounted to the circuit board (11) together with a circuit part (15) having a large heat sink (16). A module mounted (11) on the circuit board has an electronic circuit device (15) and a heat radiator (16) attached to the electronic circuit device (15). The heat radiator (16) has an extending part (16a) protruding from the electronic circuit device (15) and extending parallel to a surface of the circuit board (11). A coil mounting area provided with no pattern wire is formed in a part of the circuit board (11) facing the extending part (16a). The flat coil element (13) is mounted parallel to the circuit board (11) in a state where a coil part of the flat coil element (13) faces the coil mounting area.
Abstract:
Eine Vorrichtung 10 zur schüttelfesten Aufnahme von elektrischen Sonderbauelementen 11, 12 und/oder elektrischen Schaltungen, insbesondere in Ausbildung als zweite Bestückungsebene in einem Steuergerät, besteht aus einem Träger 13, auf dem ein Schaltungsträger 14 mit darauf befestigten Sonderbauelementen 11, 12 elektrisch isoliert wenigstens teilflächig aufgebracht ist, vorzugsweise durch Verkleben.
Abstract:
The invention relates to the spatial arrangement of radially and axially cabled components on a circuit card (4). According to the invention, at least one axially cabled component, e.g. a diode (2), and optionally an axial SMD component, are arranged beneath at least one radially cabled component, e.g. an encased capacitor (1) and directly adjacent to the leads thereof (7, 8). In another embodiment, the body of the axially cabled component (2) is partly surrounded by at least one lead (7) of the radially cabled component (1), thus optimally utilizing the space beneath said component (1).