摘要:
A plastic package (100) in which a semiconductor chip (101) is adhesively (102) attached to a metal stripe (110a) having an agglomerate structure, and electrically connected to bondable and solderable metal stripes (120) having particulate structures; metal stripes (120) are touching metal stripes (110b) of agglomerate structure to form vertical stacks (150); coats of solder (140) are welded to the agglomerate metal stripes (100a and 110b).
摘要:
A semiconductor system (100) comprises a first component including a first semiconductor chip (110) attached to the pad (120) of a leadframe made of a first metal sheet of high thermal conductivity, and a second component including a second semiconductor chip (140) attached to the pad (150) of a leadframe made of a second metal sheet wire-bondable on both surfaces. Wires (160) connect chip (140) to leads (151) at the surface (151a) facing the chip. A polymeric housing (170) encapsulates chip (140) and wires (160), leaving un-encapsulated the lead surface (151b) facing away from chip (140). Housing (170) is attached to the first chip (110) using a layer (180) of low thermal conductivity, and lead surfaces (151 b), facing away from the first chip (110), are connected by wires (131) to leads (121) of the first metal leadframe.
摘要:
In a method for transferring at least one of power and ground signal between a die and a package base of a semiconductor device, a connector is formed there between. The connector, which is disposed above the die attached to the package base, includes a center pad electrically coupled to the die by a plurality of conductive bumps and a finger extending outward from the center pad towards the package base. The finger is electrically coupled to the package base by a conductive pad. A plurality of bond wires are formed to electrically couple the package base and the die. A resistance of a conductive path via the connector is much less than a resistance of a conductive path via any one of the plurality of bond wires to facilitate an efficient transfer of the at least one of power and ground signal.
摘要:
BGA packages have thermal properties which are enhanced by a heat channel through the substrate. Solder ball attachment points are provided at the surface of the heat channel for receiving solder balls. A BGA includes an IC operably coupled to a substrate having a top surface for receiving the IC and a bottom surface defining the perimeter of the package bottom. An encapsulant encloses the IC and at least a portion of the top surface of the substrate, defining the top and sides of the package. The substrate includes a heat channel aperture for receiving heat channel having a surface proximal to the IC and having a patterned opposing surface defining at least an interior portion of the package bottom and coupling to solder balls. Methods for assembling packages are disclosed in which a substrate is provided with a heat channel aperture and the heat channel is placed therein.
摘要:
A semiconductor chip (101) with bond pads (110) on a substrate (103) with rows and columns of regularly pitched metal contact pads (131). A zone comprises a first pair (131a, 131b) and a parallel second pair (131c, 131d) of contact pads, and a single contact pad (131e) for ground potential; staggered pairs of stitch pads (133) connected to respective pairs of adjacent contact pads by parallel and equal-length traces (132a, 132b, etc.). Parallel and equal-length bonding wires (120a, 120b, etc.) connect bond pad pairs to stitch pad pairs, forming differential pairs of parallel and equal-length conductor lines. Two differential pairs in parallel and symmetrical position form a transmitter/receiver cell for conducting high-frequency signals.
摘要:
A semiconductor chip (101) with bond pads (110) on a substrate (103) with rows and columns of regularly pitched metal contact pads (131). A zone comprises a first pair (131a, 131b) and a parallel second pair (131c, 131d) of contact pads, and a single contact pad (131e) for ground potential; staggered pairs of stitch pads (133) connected to respective pairs of adjacent contact pads by parallel and equal-length traces (132a, 132b, etc.). Parallel and equal-length bonding wires (120a, 120b, etc.) connect bond pad pairs to stitch pad pairs, forming differential pairs of parallel and equal-length conductor lines. Two differential pairs in parallel and symmetrical position form a transmitter/receiver cell for conducting high-frequency signals.
摘要:
A programmed, circuit-controlled digital micro-mirror device (DMD, 202) guides the laser light (201) to create on the surface (211) of an object (210) two-dimensional finely detailed symbolization sets, including bar codes, for a plurality of semiconductor devices (212). The laser light (224) changes a first optical reflectivity of full-field device surface regions to a second optical reflectivity different from and contrasting with the first reflectivity. The programming of the DMD may include time-dependent encrypted codes to shine the laser light onto portions of the two-dimensional surface regions during variable periods of time, creating shadow and three-dimensional effects.