Abstract:
A semiconductor device is described comprising a semiconductor die 2 that is embedded in a package, wherein the die has a front side 28 comprising a plurality of pads to be bonded to terminals of the package, and wherein a backside 16 of the die is coupled to a backside surface 29 of the package by a thermal bridge.
Abstract:
Semiconductor dies and methods to mold lock a semiconductor die are disclosed. A disclosed example semiconductor die includes a top surface (12), a bottom surface (14), and a plurality of sides joining the top surface and the bottom surface. At least one of the sides includes an interference structure to mold lock the die in a package.
Abstract:
In a method and system for fabricating a leadframe (100), a thickness of bondable areas (150, 154) of the leadframe is reduced. A plating finish (160) is applied to a surface of the leadframe, including the surface of the bondable areas to provide a smooth texture. A selective portion (102) of the surface is removed by grinding off the plating finish on the selective portion to provide a rough texture while substantially preserving the smooth texture on the bondable areas. Removal of the plating finish on the selective portion causes the selective portion to form the rough texture, compared to the smooth texture of the plating finish. The rough texture provides increased adhesion to a polymeric compound compared to an adhesion provided by the smooth texture. Bondability of the bondable areas is maintained by preserving the smooth texture of the plating finish.
Abstract:
A semiconductor device comprising a leadframe (903), which has first (903a) and second (903b) surfaces, a planar pad (910) of a certain size, and a plurality of non-coplanar members (913) adjoining the pad. The device further has a heat spreader (920) with first (920a) and second (920b) surfaces, a planar pad of a size matching the leadframe pad size, and contours (922), into which the leadframe members are inserted so that the first spreader pad surface touches the second leadframe pad surface across the pad size. A semiconductor chip (904) is mounted on the first leadframe pad surface. Encapsulation material (930), preferably molding compound, covers the chip, but leaves the second spreader surface uncovered.
Abstract:
An integrated circuit (IC) package (100) comprises an IC (102) and leads (104) coupled to the IC. Each lead has a first end (106) configured to be coupled to the integrated circuit and a second end (108) configured to pass through one of a plurality of mounting holes (110) extending through a mounting board (112). The leads comprise at least one positioning lead (114) comprising a stop (118) being a continuous part of the positioning lead and having a lateral dimension (120) greater than a diameter (122) of a first hole (124) of the plurality of mounting holes. The leads further comprise at least one non-positioning lead (116) having a continuous uniformly shaped body (130) with a lateral dimension (132) less than a diameter (134) of a second hole (136) of the plurality of mounting holes. The stop limits an extension of the non-positioning lead through the second hole.
Abstract:
Small feature identifying markings (24) are provided for tracing completed IC (integrated circuit) packages (20) to individual mold cavities. Preferred embodiments of the invention include IC packages and associated methods for forming indicia in a surface of an integrated circuit package in an arrangement indicative of a particular mold cavity. The indicia may be read to determine the particular mold cavity associated with the manufacture of an individual integrated circuit package. Preferred embodiments of the invention are included using surface dots or indentation indicia configured in a binary code arrangement.
Abstract:
A semiconductor device is described comprising a semiconductor die 2 that is embedded in a package, wherein the die has a front side 28 comprising a plurality of pads to be bonded to terminals of the package, and wherein a backside 16 of the die is coupled to a backside surface 29 of the package by a thermal bridge.
Abstract:
An RFID (radio frequency identification) transponder having a semiconductor die (6) with a solderable contact area (12) and an antenna made from a winding wire (2), wherein the winding wire is soldered to the contact area (12) and the solderable contact area (12) is made from a nickel based alloy.
Abstract:
Disclosed herein is a method of manufacturing a semiconductor package (101) with a solder standoff (161) on lead pads (103) that reach to the edge of the package (non-pullback leads). It includes encapsulating a plurality of die (104) on a lead frame strip (110). The lead frame strip comprises a plurality of package sites, which further comprises a plurality of lead pads and a die pad (107). The method also includes forming a channel between the lead pads of nearby package sites without singulating the packages. Another step in the method includes disposing solder on the lead pads, the die pad, or the lead pads and the die pads without substantially covering the channel with solder. The manufacturing method further includes singulating the packages.
Abstract:
A device comprising a semiconductor chip (110) having a side edge (111) and a plurality of metal bond pads (120, 121) near the edge; the pads are aligned to form rows (130, 131) parallel to the edge. The device further includes a leadframe (100) having leads oriented with one end towards the chip edge and spaced from it by a gap (150); the chip is attached to the leadframe. Ends of selected leads are connected by a metal cross bar (160) parallel to the chip edge. Substantially parallel bond wires (170) are crossing the gap to connect each chip pad either to the crossbar or to a non-selected lead end. In a preferred lead arrangement, the selected leads alternate with non-selected leads.