Abstract:
The disclosure discloses a crystal device without an external package, which comprises: a crystal body (21) and two pins (22), wherein the crystal body (21) is a cylindrical body port of a crystal with the external package (15) and redundant pins (12, 13) being removed, and is arranged on a Printed Circuit Board (PCB) horizontally. The two pins (22) are connected to a bottom end of the crystal body (21). Extension parts of the two pins (22) are inclined towards the PCB, and become horizontal when they reach the PCB and are welded to the PCB, and a spacing between the two pins (22) increases gradually. The disclosure also discloses a method for manufacturing a crystal device without a package. The device and method can reduce the cost and make the welding more convenient.
Abstract:
Disclosed herein are a PCB and a probe including the same. The probe includes a transducer (110; 710), a PCB (120; 220; 320; 420; 520; 620; 720) having a pattern part (125; 225; 325; 425; 525; 625) contacting the transducer (110; 710) via face-to-face contact, and a bonding member (130) bonding the transducer (110; 710) to the pattern part (125; 225; 325; 425; 525; 625) of the PCB (120; 220; 320; 420; 520; 620; 720). A bonding part of the PCB (120; 220; 320; 420; 520; 620; 720) is provided with the pattern part (125; 225; 325; 425; 525; 625) to increase a bonding area of the bonding part and to allow the bonding member (130) to contact not only a metal layer of the bonding part but also an electrical insulation part thereof, thereby improving a bonding force between the transducer (110; 710) and the PCB (120; 220; 320; 420; 520; 620; 720). As a result, the transducer (110; 710) can be reliably bonded to the PCB (120; 220; 320; 420; 520; 620; 720), so that performance of the transducer can be prevented from being deteriorated due to defective connection between the PCB and the transducer.
Abstract:
A stand-off mounting apparatus (10/50/80) includes an insulative carrier (12/52/82) for off-board mounting of leaded or surface-mount components (18, 20/58-62/92-96), particularly large temperature-sensitive discrete components such as capacitors. The carrier (12/52/82) has a component-mounting surface that is elevated relative to the circuit board (14), and is positioned with respect to the circuit board (14) such that the circuit board area under the mounting surface of the carrier (12/52/82) is available for the placement of smaller non-temperature-sensitive components. The off-board components (18, 20/58-62/92-96) are mounted on the component-mounting surface of the carrier (12/52/82), and the carrier (82) may include support features (102) for providing additional mechanical support for the components (92-96). Electrical leads (16/56/88) for electrically coupling the elevated components (18, 20/58-62/92-96) to the circuit board (14) may be insert-molded in the carrier (12/52), or may be inserted into plated through-holes (110) in the carrier (82).
Abstract:
A device (10) for the vibration-proof mounting of electric special components (11, 12) and/or electric circuits, particularly configured as a second assembly level in a control unit, is comprised of a support (13) to which a circuit support (14) having special components (11, 12) fastened thereto is applied at least to a portion of the support surface in an electrically insulated manner, preferably by gluing.
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).
Abstract:
The elctric lamp having a cap (10) of synthetic resin is suitable for use on a printed circuit board (6). The cap (10) has resilient arms (15) extending alongside a plane (8) through the axis (2) of the lamp vessel (1). The holder portion (11) of the cap (3) holding the lamp vessel (1), and the arms (3) can clamp a p.c.b. (6) in between them. Means (19, 21) may be present to keep the lamp fixed in an opening (9) in p.c.b. (6) or at an edge thereof. The lamp requires little space on a p.c.b.
Abstract:
The disclosure discloses a crystal device without an external package, which comprises: a crystal body (21) and two pins (22), wherein the crystal body (21) is a cylindrical body port of a crystal with the external package (15) and redundant pins (12, 13) being removed, and is arranged on a Printed Circuit Board (PCB) horizontally. The two pins (22) are connected to a bottom end of the crystal body (21). Extension parts of the two pins (22) are inclined towards the PCB, and become horizontal when they reach the PCB and are welded to the PCB, and a spacing between the two pins (22) increases gradually. The disclosure also discloses a method for manufacturing a crystal device without a package. The device and method can reduce the cost and make the welding more convenient.
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.