Abstract:
A semiconductor package (10) uses a plurality of thermal conductors (56-64) that extend upward within an encapsulant (16) from one or more thermal bond pads (22, 24, 26) on a die (14) to disperse heat. The thermal conductors may be bond wires or conductive stud bumps and do not extend beyond a lateral edge of the die. One or more of the thermal conductors may be looped within the encapsulant and exposed at an upper surface of the encapsulant. In one form a heat spreader (68) is placed overlying the encapsulant for further heat removal. In another form the heat spreader functions as a power or ground terminal directly to points interior to the die via the thermal conductors. Active bond pads may be placed exclusively along the die's periphery or also included within the interior of the die.
Abstract:
An integrated circuit (10) has a semiconductor substrate (12) and an interconnect layer (14) that mechanically relatively weak and susceptible to cracks and delamination. In the formation of the integrated circuit from a semiconductor wafer, a cut (26) is made through the interconnect layer (14) to form an edge of the interconnect layer. This cut may continue completely through the wafer thickness or stop short of doing so. In either case, after cutting through the interconnect layer, a reconditioning layer (30) is formed on the edge of the interconnect layer. This reconditioning layer seals the existing cracks and delaminations and inhibits the further delamination or cracking of the interconnect layer. The sealing layer may be formed, for example, before the cut through the wafer, after the cut through the wafer but before any packaging, or after performing wirebonding between the interconnect layer and an integrated circuit package.
Abstract:
A semiconductor package uses various forms of conductive traces that connect to die bond pads via bond wires. In one form, adjacent bond wires are intentionally crossed around midpoints thereof to reduce self-inductance of the conductors and to minimize self-inductance. In another form, bond wires associated with bond pads having intervening, unrelated bond pads are crossed. Additionally, conductive traces are divided into separate sections and electrically connected by crossed jumper wires or bond wires. Any number of separate sections may be formed for each trace, but an even number is preferable. In another form, one trace is continuous and divides a second trace into two or more sections. The multiple sections are connected by an overlying bond wire. Either insulated or non-insulated bond wire may be used.
Abstract:
A semiconductor package uses various forms of conductive traces that connect to die bond pads via bond wires. In one form, adjacent bond wires are intentionally crossed around midpoints thereof to reduce self-inductance of the conductors and to minimize self-inductance. In another form, bond wires associated with bond pads having intervening, unrelated bond pads are crossed. Additionally, conductive traces are divided into separate sections and electrically connected by crossed jumper wires or bond wires. Any number of separate sections may be formed for each trace, but an even number is preferable. In another form, one trace is continuous and divides a second trace into two or more sections. The multiple sections are connected by an overlying bond wire. Either insulated or non-insulated bond wire may be used.
Abstract:
A packaging assembly (30), such as a ball grid array package, is formed which distributes power across an interior region of an integrated circuit die (52) by using an encapsulated patterned leadframe conductor (59) that is disposed over the die (52) and bonded to a plurality of bonding pads (45) formed in a BGA carrier substrate (42) and in the interior die region, thereby electrically coupling the interior die region to an externally provided reference voltage.
Abstract:
A method of packaging a semiconductor (10) includes providing a support structure (12). An adhesive layer (14) is formed overlying the support structure (12) and is in contact with the support structure. A plurality of semiconductor die (16, 18, 20) is placed on the adhesive layer. The semiconductor die are laterally separated from each other and have electrical contacts that are in contact with the adhesive layer. A layer (26) of encapsulating material is formed overlying and between the plurality of semiconductor die and has a distribution of filler material (28). A concentration of the filler material (28) is increased in all areas laterally adjacent each of the plurality of semiconductor die.
Abstract:
A die (10) for an integrated circuit comprising an active area (22) is provided. The die (10) may further comprise a first ring (12) in a peripheral region of the die (10) at least partially surrounding the active area (22), wherein the first ring (12) may comprise a plurality of polygon shaped cells (32, 36). The die (10) may further comprise a second ring (14) surrounding the first ring (12), wherein the second ring (14) may comprise a plurality of polygon shaped cells (32, 36).
Abstract:
An integrated circuit die (10) has a copper contact (16, 18), which, upon exposure to the ambient air, forms a native copper oxide. An organic material is applied to the copper contact which reacts with the native copper oxide to form an organic coating (12, 14) on the copper contact in order to prevent further copper oxidation. In this manner, further processing at higher temperatures, such as those greater than 100 degrees Celsius, is not inhibited by excessive copper oxidation. For example, due to the organic coating, the high temperature of the wire bond process does not result in excessive oxidation which would prevent reliable wire bonding. Thus, the formation of the organic coating allows for a reliable and thermal resistance wire bond (32, 34). Alternatively, the organic coating can be formed over exposed copper at any time during the formation of the integrated circuit die to prevent or limit the formation of copper oxidation.
Abstract:
A semiconductor package (10) uses a plurality of thermal conductors (56-64) that extend upward within an encapsulant (16) from one or more thermal bond pads (22, 24, 26) on a die (14) to disperse heat. The thermal conductors may be bond wires or conductive stud bumps and do not extend beyond a lateral edge of the die. One or more of the thermal conductors may be looped within the encapsulant and exposed at an upper surface of the encapsulant. In one form a heat spreader (68) is placed overlying the encapsulant for further heat removal. In another form the heat spreader functions as a power or ground terminal directly to points interior to the die via the thermal conductors. Active bond pads may be placed exclusively along the die's periphery or also included within the interior of the die.
Abstract:
An integrated circuit (10) has a semiconductor substrate (12) and an interconnect layer (14) that mechanically relatively weak and susceptible to cracks and delamination. In the formation of the integrated circuit from a semiconductor wafer, a cut (26) is made through the interconnect layer (14) to form an edge of the interconnect layer. This cut may continue completely through the wafer thickness or stop short of doing so. In either case, after cutting through the interconnect layer, a reconditioning layer (30) is formed on the edge of the interconnect layer. This reconditioning layer seals the existing cracks and delaminations and inhibits the further delamination or cracking of the interconnect layer. The sealing layer may be formed, for example, before the cut through the wafer, after the cut through the wafer but before any packaging, or after performing wirebonding between the interconnect layer and an integrated circuit package.