Abstract: A printed circuit board transmission line utilized as a millimeter wave attenuator is provided. The printed circuit board transmission line includes a transmission line and a signal feed part. The transmission line has a first terminal and a second terminal. The signal feed part is electrically connected to the first terminal. The transmission line has a predetermined line width and a predetermined line length. The signal feed part receives an external signal, and the external signal is outputted from the second terminal through the transmission line. According to a degree of signal loss required in a practical application, the signal loss of the transmission line can be between 3 decibels and 40 decibels through a cooperation of the predetermined line width and the predetermined line length. Further, when the transmission line is utilized as a millimeter wave termination, the signal loss of the transmission line is 20 decibels.

Abstract: The present disclosure discloses a device for, and a method of, detecting a signal delay. The method of detecting a signal delay includes inputting a first signal and a second signal to a logic circuit to obtain an output signal; measuring an average voltage of the output signal; and determining a delay time of the second signal relative to the first signal based on a difference between the average voltage of the output signal and a reference voltage. The device for detecting a signal delay includes a clock output of a clock generator connected to a first logic input of a logic circuit and to a connection area for receiving a circuit to be tested. A second logic input of the logic circuit is also connected to the connection area. The voltage measurement device is connected to a logic output of the logic circuit.

Abstract: A conformal shielding module comprising a substrate, at least one electronic component mounted on the substrate, and a molding compound covering the electronic component. The molding compound includes a vertical channel extending from a surface of the molding component to the electronic component, and an electrically conductive structure formed inside the vertical channel. The electrically conductive structure is electrically connected to the electronic component and includes a testing contact on the surface of the molding compound for in-circuit test of the electronic component.

Abstract: A wireless communication module includes: amounting board including a dielectric frame and a dielectric panel that are stacked together, the frame defining a frame space; at least one electronic component mounted on the mounting board and extending into the frame space; and a plurality of conductive bodies embedded in the dielectric frame and surrounding the frame space so as to prevent electromagnetic interference resulting from the electronic component.

Abstract: An electromagnetic shielding device includes a metal frame mounted on a circuit board and having a looped surrounding wall configured with an inner space divided into first and second space portions by a partition wall unit. A cover is mounted fittingly into the inner space in the metal frame, and includes a dielectric cover body, and a conductive material layer attached to an outer surface of the cover body. The cover body has a looped surrounding wall extending downwardly from a periphery of a top wall and disposed in proximity to the looped surrounding wall of the metal frame such that the conductive material layer is in electrical contact with the looped surrounding wall of the metal frame. The cover cooperates with the metal frame to define first and second cavities having different depths and corresponding respectively to the first and second space portions.

Abstract: A metallic cover of a miniaturization module includes a substrate, a SMD chip unit and a metallic cover, the metallic cover embracing the SMD chip unit and having at least one sizing hole and a plurality of venting holes, the venting holes being disposed around the sizing hole, and the sizing hole and the venting holes being positioned above the SMD chip unit so that glue portions fill up slits between the metallic cover and the SMD chip unit. The venting holes stop the glue portion from running over the second chip unit. The glue-filled slits between the top lid and the SMD chip unit provides a strong support to prevent any deformation of the metallic cover when the metallic cover is tested and processed.

Abstract: A test method for Land Grid Array components includes the steps of: providing a test board with a plurality of test points; providing a secondary test board which has a plurality of conductors extending therethrough from a top surface to a bottom surface and forms a drop thereon, placing the secondary test board on the test board and contacting the conductors with the test points correspondingly; disposing a conducting spacer on the secondary test board, which is contacted with the conductors of the secondary test board correspondingly; and placing a test object on the conducting spacer, which has a plurality of conducting terminals contacted with the conducting spacer, and pressing the test object downwards so that the conducting terminals, the conducting spacer, the conductors and the test points are electrically connected for testing the test object. A test device for Land Grid Array components also is provided.

Abstract: An electromagnetic shielding device includes a metal frame mounted on a circuit board and having a looped surrounding wall configured with an inner space divided into first and second space portions by a partition wall unit. A cover is mounted fittingly into the inner space in the metal frame, and includes a dielectric cover body, and a conductive material layer attached to an outer surface of the cover body. The cover body has a looped surrounding wall extending downwardly from a periphery of a top wall and disposed in proximity to the looped surrounding wall of the metal frame such that the conductive material layer is in electrical contact with the looped surrounding wall of the metal frame. The cover cooperates with the metal frame to define first and second cavities having different depths and corresponding respectively to the first and second space portions.

Abstract: An electromagnetic shielding device includes a base board mounted with an electronic component on a top surface thereof and having a looped surrounding surface interconnecting the top surface and a bottom surface. The surrounding surface has an inclined upper surface portion extending outwardly and downwardly from a periphery of the top surface and attached with a looped solder pad. A metal cover is mounted on the base board, and has a looped surrounding wall extending downwardly from a periphery of a top wall. The surrounding wall has a bottom end connected electrically and fixedly to the solder pad such that the metal cover cooperates with the base board to define an inner receiving space therebetween for receiving the electronic component.

Abstract: A metallic cover of a miniaturization module includes a substrate, a SMD chip unit and a metallic cover, the metallic cover embracing the SMD chip unit and having at least one sizing hole and a plurality of venting holes, the venting holes being disposed around the sizing hole, and the sizing hole and the venting holes being positioned above the SMD chip unit so that glue portions fill up slits between the metallic cover and the SMD chip unit. The venting holes stop the glue portion from running over the second chip unit. The glue-filled slits between the top lid and the SMD chip unit provides a strong support to prevent any deformation of the metallic cover when the metallic cover is tested and processed.

Abstract: A wireless communication module includes: a module board including a module substrate having opposite first and second surfaces, conductive pads formed on the first surface, and an electronic component mounted to the second surface; a carrier stacked to the module board and having opposite first and second surfaces and a peripheral end that has a peripheral end face extending between the first and second surfaces of the carrier and formed with multiple spaced apart grooves; multiple spaced apart first conductive contacts formed on the first surface of the module substrate, and contacting a respective one of the module contacts; multiple spaced apart second conductive contacts formed on the second surface of the module substrate; and multiple conductive leads that interconnect the first and second conductive contacts.

Abstract: A wireless communication module includes: amounting board including a dielectric frame and a dielectric panel that are stacked together, the frame defining a frame space; at least one electronic component mounted on the mounting board and extending into the frame space; and a plurality of conductive bodies embedded in the dielectric frame and surrounding the frame space so as to prevent electromagnetic interference resulting from the electronic component.

Abstract: A method of manufacturing a miniaturization chip module includes steps of providing a chip module having a substrate, wherein the substrate has a plurality of bonding pads spaced on a rear surface of substrate; providing a lead frame including a plurality of spaced metallic studs, wherein the metallic studs are attached onto the bonding pads; and forming metallic blocks as I/O pins by removing a part of each metallic stud and a part of the lead frame which is not in contact with the substrate.

Abstract: A small-sized communication module package mountable on a main board is of stacked structure including a carrier with an opening in which a thermal conductive layer in contact with a substrate stacked on the carrier is filled. The communication module package further includes a chip electrically bonded to the substrate, received in the opening and encapsulated by the thermal conductive layer, and a metal layer in contact with the thermal conductive layer for enhancing heat dissipation.

Abstract: A wireless communication module assembly includes a main board having a top surface on which a plurality of grounding pads are provided, a circuit board unit, and a metal cap. The circuit board unit has a bottom surface electrically mounted on the top surface of the main board, a top surface with a plurality of grounding pads, and a plurality of notches corresponding to the grounding pads of the main board. The metal cap covers the circuit board unit and has first mounting legs respectively and electrically connected with the grounding pads of the circuit board unit, and second mounting legs respectively passing through the notches of the circuit board unit and electrically connected with the grounding pads of the main board.

Abstract: A communication module package assembly includes a main board having grounding pads, a communication module package electrically bonded on the main board and having notches corresponding in location to the grounding pads respectively, and a metal cover covering the communication module package and having mounting legs passing through the notches and electrically connected to the grounding pads respectively. The communication module package is of stacked structure including a carrier with an opening in which a thermal conductive layer in contact with a substrate stacked on the carrier is filled. The communication module package further includes a chip electrically bonded to the substrate, received in the opening and encapsulated by the thermal conductive layer, and a metal layer sandwiched between and in contact with the thermal conductive layer and the main board.

Abstract: A communications module includes: a circuit board having a peripheral end; a first electronic component mounted on the circuit board; a plurality of second electronic components mounted on the circuit board and having a structural strength less than that of the first electronic component; and a metal cover secured to the peripheral end of the circuit board. The metal cover includes a top wall disposed over the first and second electronic components and formed with a protrusion protruding toward the first electronic component. The distance between the protrusion and the first electronic component is less than the distance between the top wall of the cover and the second electronic components.

Abstract: A planar inverted-F antenna includes a ground element, a shorting element, a radiating element, and a feeding element. The shorting element extends upwardly from the ground element. The radiating element is disposed above the ground element, and extends transversely from the shorting element. The radiating element includes a meandering strip and a flat plate. The meandering strip has opposite first and second ends. The first end of the meandering strip is coupled to the shorting element. The flat plate has a connecting side that is connected to the second end of the meandering strip and that has a length different from that of the second end of the meandering strip. The feeding element has a first end that is connected to the radiating element, and a second end that extends through and that is free from electrical contact with the ground element.

Abstract: A planar inverted-F antenna includes a ground element, a shorting element, a radiating element, and a feeding element. The shorting element extends upwardly from the ground element. The radiating element is disposed above the ground element, and extends transversely from the shorting element. The radiating element includes a meandering strip and a flat plate. The meandering strip has opposite first and second ends. The first end of the meandering strip is coupled to the shorting element. The flat plate has a connecting side that is connected to the second end of the meandering strip and that has a length different from that of the second end of the meandering strip. The feeding element has a first end that is connected to the radiating element, and a second end that extends through and that is free from electrical contact with the ground element.