Abstract:
A leadframe employed by a leadless package comprises a plurality of package units and an adhesive tape. Each of the package units has a die pad with a plurality of openings and a plurality of pins disposed in the plurality of openings. The adhesive tape is adhered to the surfaces of the plurality of package units and fixes the die pad and the plurality of pins.
Abstract:
An electronic component mounting structure includes a board and an electronic component mounted on a surface of the board. The board includes lands. The electronic component includes a body and terminals extending from the body. Each terminal is electrically connected to a corresponding one of the lands of the board. The terminal has a first terminal portion extending along the surface of the board and a second terminal portion extending toward the surface of the board. Each land includes a land portion electrically soldered to the first terminal portion and a blind hole for receiving the second terminal portion. The first terminal portion is soldered to the land portion in a reflow process under the condition that the second terminal portion is inserted in the blind hole.
Abstract:
An electrical connection terminal for a connection hole includes: a base-side end portion (310) having a predetermined width; a retaining portion (313) having an increasing width wider than the predetermined width of the base-side end portion (310), the retaining portion (313) being formed integrally with the base-side end portion (310); and an insertion taper portion (315) having a taper width narrower than the increasing width of the retaining portion (313) to reach a leading end portion, the insertion taper portion (315) being formed integrally with the retaining portion (313); in which the insertion taper portion (315) is composed of a plurality of taper portions taper angles of which change so as to increase along an insertion direction.
Abstract:
An integrated circuit (IC) package that comprises a lead frame. The lead frame has a downset portion and leads. The downset portion has an exterior surface that is configured to face away from a mounting board, and an interior surface that is configured to face towards the mounting board. The leads are bent away from the exterior surface, and each of the leads have a first end coupled to an IC and a second end configured to pass through one of a plurality of mounting holes extending through the mounting board. The IC is coupled to the interior surface.
Abstract:
A leadframe employed by a leadless package comprises a plurality of package units and an adhesive tape. Each of the package units has a die pad with a plurality of openings and a plurality of pins disposed in the plurality of openings. The adhesive tape is adhered to the surfaces of the plurality of package units and fixes the die pad and the plurality of pins.
Abstract:
A printed circuit board component includes a housing carrying a peg that engages a printed circuit board hole. This peg has a radially projecting detent lug extending beyond the plug outer periphery. The lug is located and formed on the peg so the peg outer periphery is smaller in the area of the lug than the diameter of the hole. The outer periphery of the section of the peg projecting into the hole is such that, between the outer periphery of this section and the hole inner wall, a space having a capillarity for solder is formed over a portion of the outer periphery. During soldering, solder on the printed circuit board surface enters and fills the space by capillary action.
Abstract:
A lighting system for wearing apparel and the like includes a sealed housing of flexible light transmitting material with at least two hollow regions interconnected by a section having an opening therein communicating between the hollow regions, a battery in one of the hollow regions, at least one light source in each hollow region for light emission through the surface of the housing, a motion responsive switch or a user-activated switch or both contained within one of the hollow regions, light controls contained within one of the hollow regions connected to the battery, the switch and the light sources for controlling the activation of the light sources responsive to operation of the switch, the weight and volume of the battery, light control means and switch being distributed among the hollow regions.
Abstract:
An electronic component mounting structure includes a board and an electronic component mounted on a surface of the board. The board includes lands. The electronic component includes a body and terminals extending from the body. Each terminal is electrically connected to a corresponding one of the lands of the board. The terminal has a first terminal portion extending along the surface of the board and a second terminal portion extending toward the surface of the board. Each land includes a land portion electrically soldered to the first terminal portion and a blind hole for receiving the second terminal portion. The first terminal portion is soldered to the land portion in a reflow process under the condition that the second terminal portion is inserted in the blind hole.
Abstract:
A semiconductor circuit package includes features forming an electrostatic charge distribution network having nodes which are defined by the electrical contact leads of the package for the semiconductor circuit, and which are effectively connected with one another by spark-gaps. In one embodiment electrical leads of the package are provided with pointed protrusions lying in the plane of the electrical leads. Accordingly, an inadvertent electrostatic discharge is distributed throughout the semiconductor circuit at safe voltage levels determined by the characteristics of the spark gaps of the charge distribution network.
Abstract:
To prevent the lead terminals of an electronic circuit component from being bent due to the vibration of the component after being mounted on a circuit board, each lead terminal has a tapered portion formed between an inserted tip portion and a cut dumb bar portion and having a width which decreases from the dumb bar portion toward the tip portion to prevent stresses from concentrating in the terminal.