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:
The inventive shock damping system for vibration sensitive surface mounted devices consists of an elastomeric material having conductive fiber material disposed between a printed circuit board (PCB) and a surface mounted device. Once disposed between PCB and surface mounted device, the elastomeric material, the PCB and the surface mounted device are compressed together with a component restraining system, to provide a secure electrical connection between one or more interconnect pads conductively attached to surface mounted device and the PCB. The elastomeric material allows signals and current to flow between surface mounted device and PCB without the use of any attached wires or leads while at the same time providing a system for damping any shocks or vibrations that may be transferred to surface mounted device through the PCB or through the protective component restraining system that encloses the device and the elastomeric material.
Abstract:
A wiring board module (10) is provided with a multilayer wiring board (11), and on a mounting surface (11a) of the multilayer wiring board (11), a crystal oscillator (1), an IC component (2) and the like are mounted. On the mounting surface (11a), a mounting land (12) for the IC component (2), a mounting land (13) for the crystal oscillator (1) and a mounting land (14) for other surface mounting component are formed. Particularly, the mounting land (13) for the crystal oscillator (1) is not like the conventional land solely having a large area. Adjacent four land pieces (13a) are electrically connected through one external terminal (1a) of the crystal oscillator (1) to function as a mounting land for the external terminal (1a). In other words, a plurality of the mounting lands (13) provided at positions corresponding to each of the outer terminal (1a) of the crystal oscillator (1) are divided into four land pieces (13a).
Abstract:
The present invention provides an electronic circuit unit that is suitable for miniaturization and has a good manufacturing productivity. An electronic circuit unit of the present invention comprises a circuit board 3 mounted within a frame member 1, an electronic component 5 with a cover mounted on the circuit board 3, and a plurality of linear terminals 9 passing through and being mounted in the circuit board 3. The terminals 9 comprise at least first and second terminal groups 7a and 7b arranged at an interval between the respective terminals in a line. The first and the second terminal groups 7a and 7b are arranged in a line in the vicinity of one side of the circuit board 3. An opening portion 10 is provided between the first and second terminal groups 7a and 7b, and the electronic component 5 with the cover is mounted on the circuit board 3 while being disposed in the opening portion 10. As a result, a space factor for the arrangement of the electronic component 5 with the cover is very good, and thus it is possible to reduce a widthwise dimension of the circuit board 3, thereby obtaining a small-sized electronic circuit unit.
Abstract:
A wiring board (1) has an insulation base plate (11), and a plurality of electrodes (12) provided adjacent to each other in plan view on the insulation base plate (11), the electrodes (12) have an opening (12b) in the outer periphery and a slit (12a) oriented from the outer periphery to the interior, and, among two electrodes (12) adjacent to each other, the slit (12a) in one electrode (12) has a central line (12c) intersecting the outer periphery of the other electrode (12).
Abstract:
The present invention provides a micropackaged device comprising: a substrate for securing a device; a corrosion barrier affixed to said substrate; optionally at least one feedthrough disposed in said substrate to permit at least one input and or at least one output line into said micropackaged device; and an encapsulation material layer configured to encapsulate the micropackaged device.
Abstract:
A base of a surface-mount electronic component package holds an electronic component element and is to be mounted on a circuit board with a conductive bonding material. The base has a principal surface and an external connection terminal to be electrically connected to the circuit board. The external connection terminal is formed in the principal surface. The base includes a bump formed on the external connection terminal. The bump is smaller than the external connection terminal. The base has a distance d between an outer periphery end edge of the external connection terminal and an outer periphery end edge of the bump along an attenuating direction of stress on the external connection terminal. The stress is generated in association of mounting of the base on the circuit board. The distance d is more than 0.00 mm and equal to or less than 0.45 mm.
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:
The present invention provides an electronic circuit unit that is suitable for miniaturization and has a good manufacturing productivity. An electronic circuit unit of the present invention comprises a circuit board 3 mounted within a frame member 1, an electronic component 5 with a cover mounted on the circuit board 3, and a plurality of linear terminals 9 passing through and being mounted in the circuit board 3. The terminals 9 comprise at least first and second terminal groups 7a and 7b arranged at an interval between the respective terminals in a line. The first and the second terminal groups 7a and 7b are arranged in a line in the vicinity of one side of the circuit board 3. An opening portion 10 is provided between the first and second terminal groups 7a and 7b, and the electronic component 5 with the cover is mounted on the circuit board 3 while being disposed in the opening portion 10. As a result, a space factor for the arrangement of the electronic component 5 with the cover is very good, and thus it is possible to reduce a widthwise dimension of the circuit board 3, thereby obtaining a small-sized electronic circuit unit.