Abstract:
A transistor outline (TO) package (12) is provided for a semiconductor integrated device suitable for use in a control module of an automobile for connection between a printed circuit board (PCB) and a bus bar of such a module. The package comprises a package housing (14), having a first end (14b) suitable for mounting to a PCB and which has a width (w). The package is also formed with a leadframe which comprises a heat sink and ground plane blade (116) suitable for connection a bus bar, a plurality of connector leads (18) suitable for connection to a PCB and at least one source tab lead (206) suitable for connection to a module connector (10) of such a control module. The plurality of connection leads (18) and the source tab lead (206) extend from the first end (14b) of. the package housing side by side in the direction (D) along and within the width (w) of the first end of the package housing.
Abstract:
Methods for mounting electrical components (10, 20) on a substrate (40) and securely retaining the components (10, 20) are described. The methods include altering solder paste compositions (50), interposed between component retentive pins (25) and retentive through holes (46), during a reflow process. Electronic assemblies including circuit boards (40) and electrical components (10) mounted thereto are also described. In one of the electronic assembly embodiments (10, 20), materials originally associated with a mounted electrical component (10, 20) migrate in solder paste coupling the electrical components (10, 20) to the circuit board (40).
Abstract:
A surface-mountable integrated circuit package having leads arranged in a manner enabling the package to be manufactured with high yield but with reduced pitch between adjacent leads. The circuit package of the invention includes a body (60), and alternating first and second sets (62 and 68) of leads connected along an edge of the body. Each lead (68) in the first set is formed so that its tip extends a first distance from the body. Each lead (66) in the second set is formed so that its tip extends a second distance (substantially different than the first distance) from the body. Even if the leads are mounted with very small pitch, the separation of the tips of adjacent leads will be substantially greater than the pitch. For this reason, the package can be manufactured with high yield and reduced pitch, and shipped with formed leads with only a low risk that the leads will be accidentally bent into electrical contact with each other and without the need to enclose individual packages in individual protective cases for shipment. In a preferred embodiment, the invention includes a first set of leads having a gull-wing configuration alternating with a second set of leads having a J-bend configuration (91). In another preferred embodiment, leads having a gull-wing configuration alternate with leads having an L-bend configuration (101).
Abstract:
The present invention relates to a dashboard indicator module comprising, in a casing, a rotary motor, an output shaft, mechanical reduction means associated with the motor, at least one electrical supply coil, electrical connection tabs linked to the coils leaving said casing and electrical contact elements, characterized in that said electrical contact elements can be fitted on the connection tabs in order to produce solderless connectors on the printed circuit or even removed from the connection tabs in order to allow the connection tabs of the motor to be soldered directly to the printed circuit.
Abstract:
An electronic appliance, such as a computer and the like, comprising a printed circuit board with printed circuits arranged thereon and electromagnetic components electrically connected thereto, as well as a heat dissipating arrangement for dissipating heat generated by the components to the surrounding atmosphere, a special feature being the fact that the heat dissipating arrangement comprises a heat sink with several separate thermal conductors which are thermically connected to the printed circuits, which thermal conductors can be arranged on the printed circuit board in various positions, each position corresponding to a predetermined heat dissipation direction.
Abstract:
An improved multi-chip module includes a main circuit board having and array of electrical interconnection pads to which are mounted a plurality of IC package units. Each IC package unit includes a pair of IC packages, both of which are mounted on opposite sides of the package carrier. The package units may be mounted on one or both sides of the main circuit board. A first primary embodiment of the invention employs a laminar package carrier having a pair of major planar surfaces. Each surface incorporates electrical contact pads. One IC package is surface mounted on each major planar surface, by interconnecting the leads of the package with the contact pads on the planar surface, to form the IC package unit. A number of other vriations exist that provide various other embodiments of the invention including one in which the carrier leads are laminated directly to the leads of an IC package.
Abstract:
A method for preparing an integrated circuit for connection to a surface, the integrated circuit including lead contacts and leadless contacts, is provided. The method includes providing the integrated circuit, applying a first solder paste to the leadless contacts, forming solder balls on the applied solder paste, heating the solder balls, thereby removing at least a portion of the first solder paste and bringing the solder balls into electrical contact with the leadless contacts, the base of the solder balls being generally aligned in a plane, and bending the lead contacts into gull wings, with the base of the gull wings being substantially coplanar with the plane. The base of the gull wings and the base of the at least one of the solder balls collectively generally define a contact plane for potential future contact with the surface.