摘要:
A lead frame for a semiconductor device has a die flag and leads that surround the die flag. In order to decrease the distance or spacing between inner lead ends and the die flag, which allows for short bond wires for connecting the inner lead ends to a die mounted on the die flag, at least some of the leads are twisted along their lengths to be angled with respect to a die-flag plane. The pitch between such twisted leads can be reduced without resulting in physical contact between adjacent leads, enabling the leads to extend further towards the die flag.
摘要:
A lead frame for a semiconductor device includes a die paddle and leads situated on a perimeter of the lead frame. The die paddle has a metal frame and a number of substantially linear metal connecting bars within the frame. The connecting bars interconnect different locations of the frame to form a multiple triangles, where a triangular-shaped cavity is formed within each triangle. An overall area of the cavities is greater than an overall area of the connecting bars.
摘要:
A lead finger of a lead frame has a number of channels or grooves in a portion of its top surface that provide a locking mechanism for securing a bond wire to the lead finger. The bond wire may be attached to the lead finger by stitch bonding.
摘要:
A lead finger of a lead frame has a number of channels or grooves in a portion of its top surface that provide a locking mechanism for securing a bond wire to the lead finger. The bond wire may be attached to the lead finger by stitch bonding.
摘要:
A mold (10) including a first mold part (12) and a second mold part (14) define a mold cavity (16) therebetween. A gate (18) is formed in at least one of the first and second mold parts (12) and (14) such that the gate (18) communicates with the mold cavity (16). A vent (20) having a constricted portion (22) is arranged to communicate with the mold cavity (16). A substrate (28) including a base substrate (30) and an electrically conductive pattern (32) and (34) formed on the base substrate (30) may be received in the mold (10). A solder resist layer (36) is formed on the base substrate (30) and a portion of the electrically conductive pattern (32). A plurality of grooves (38) and (40) is formed in a staggered arrangement around a periphery of a molding area (42) on the substrate (28).
摘要:
Embodiments of three dimensional (3D) System-in-Package (SiPs) and methods for producing 3D SiPs having improved heat dissipation capabilities are provided. In one embodiment, the 3D SiP includes a heat-dissipating structure having a first principal surface and a second principal surface opposite the first principal surface. The backside of a first microelectronic device is disposed adjacent and thermally coupled to the first principal surface of the heat-dissipating structure, while the backside of a second microelectronic device is disposed adjacent and thermally coupled to the second principal surface of the heat-dissipating structure. During operation of the 3D SiP, heat generated by the microelectronic devices is conductively transferred to and dissipated through the heat-dissipating structure.
摘要:
A lead frame for a semiconductor device includes a die paddle and leads situated on a perimeter of the lead frame. The die paddle has a metal frame and a number of substantially linear metal connecting bars within the frame. The connecting bars interconnect different locations of the frame to form a multiple triangles, where a triangular-shaped cavity is formed within each triangle. An overall area of the cavities is greater than an overall area of the connecting bars.
摘要:
A method for applying a pressure-sensitive gel material during assembly of an array of pre-singulated packaged semiconductor devices. In the method, pressure-sensitive gel material is dispensed onto a first semiconductor device of the array, where the first semiconductor device is disposed within a first cavity. A first curing process is performed to partially cure the pressure-sensitive gel material in the first cavity. Pressure-sensitive gel material is then dispensed onto another semiconductor device of the array, where the other semiconductor device is disposed within another cavity. The first curing process is initiated before the dispensing of the pressure-sensitive gel material inside of the other cavity is completed and initially cures pressure-sensitive gel material for fewer than all of the pre-singulated packaged semiconductor devices of the array.
摘要:
A lead finger of a lead frame has a number of channels or grooves in a portion of its top surface that provide a locking mechanism for securing a bond wire to the lead finger. The bond wire may be attached to the lead finger by stitch bonding.
摘要:
A method and an adjustable clamp system for clamping a die assembly during wire bonding. The system includes at least one pair of opposing base walls, each of the base walls has a base clamping surface. There is at least one pair of clamping members, each one of the clamping members being movable towards a respective base clamping surface to thereby clamp a lead frame of the die assembly. A die assembly support is disposed between the pair of opposing base walls and the die assembly support and pair of opposing base walls provide a cavity. There is a position sensor coupled to a controller and there is also a drive that is controllable by the controller. The drive provides movement of the die assembly support relative to each the base clamping surface to thereby adjust a depth of the cavity. In operation, after the lead frame is clamped between the base clamping surface and clamping members, the controller allows the drive to provide the relative movement until the position sensor detects that an underside of the lead frame has abutted the die assembly support.