摘要:
A semiconductor device, a chip structure thereof, and a method for fabricating the same are proposed. The method involves cutting a wafer with an array of chips twice so as to separate the chips and to form a chip structure. The first cutting is wider than the second cutting, and both are performed on an inactive surface of each of the chips. The chip structure includes a protruding portion formed on the inactive surface. The chip structure is electrically connected to a substrate by conductive bumps in a flip-chip manner and mounted with a heat sink. A decrease in contact area between the chip and the heat sink reduces warpage caused to the semiconductor device by thermal stress, thus preventing delamination of the heat sink and cracking of the conductive bumps, and reducing the expense and time spent on finding suitable underfill materials.
摘要:
The present invention discloses a flip-chip semiconductor package and a chip carrier thereof. The chip carrier includes a groove formed around a chip-mounting area. The groove may be formed along a periphery of the chip-mounting area or at corners thereof. The groove is filled with a filler of low Young's modulus so as to absorb and eliminate thermal stress, thereby preventing delamination between an underfill and a flip chip mounted on the chip-mounting area.
摘要:
The present invention discloses a flip-chip semiconductor package and a chip carrier thereof. The chip carrier includes a groove formed around a chip-mounting area. The groove may be formed along a periphery of the chip-mounting area or at corners thereof. The groove is filled with a filler of low Young's modulus so as to absorb and eliminate thermal stress, thereby preventing delamination between an underfill and a flip chip mounted on the chip-mounting area.
摘要:
A lead frame and a semiconductor package with the lead frame are provided. The lead frame includes a die pad for mounting at least one semiconductor chip thereon; at least one grounding portion protruded from the die pad; and a plurality of leads. The grounding portion has a grounding surface and an opposing bottom surface, wherein the thickness of the grounding portion is smaller than that of the die pad, and a ground pad is formed on the grounding surface for connecting at least one grounding wire to the chip for transmitting ground signals. A plurality of bonding wires are connected from the chip to the leads such that the chip can be electrically connected to an external device via the bonding wires and leads. By the above arrangement, the grounding wire can be prevented from breakage by thermal stress in a high-temperature process, and the production yield is improved.
摘要:
A lead frame and a semiconductor package with the lead frame are provided. The lead frame includes a die pad for mounting at least one semiconductor chip thereon; at least one grounding portion protruded from the die pad; and a plurality of leads. The grounding portion has a grounding surface and an opposing bottom surface, wherein the thickness of the grounding portion is smaller than that of the die pad, and a ground pad is formed on the grounding surface for connecting at least one grounding wire to the chip for transmitting ground signals. A plurality of bonding wires are connected from the chip to the leads such that the chip can be electrically connected to an external device via the bonding wires and leads. By the above arrangement, the grounding wire can be prevented from breakage by thermal stress in a high-temperature process, and the production yield is improved.
摘要:
A semiconductor package substrate includes a body having an upper surface and a lower surface opposite to one another, a plurality of circuit layers formed in the body, a plurality of solder pads formed on the upper surface of the body, and a plurality of solder ball pads formed on the lower surface of the body. Each of the solder pads is electrically connected to one of the solder ball pads via the circuit layers and conductive structures disposed between the circuit layers, wherein the circuit layers and conductive structures are configured to expand outwardly in a fan-out manner so as to provide more space between the circuit layers closer to the lower surface of the body such that part of the solder pad-solder ball pad electrical connections can comprise a plurality of parallel connected conductive structures formed in the space, thereby enhancing the heat conducting passageway and the effect of heat-dissipation without having to dispose more solder pads on surface of the substrate.
摘要:
A heat dissipation unit and a semiconductor package having the same are disclosed. The semiconductor package includes a carrier; an electronic component mounted on and electrically connected to the carrier; a heat dissipation unit, which includes a flat section attached to the electronic component, extension sections connected to the flat section, and a heat dissipation section connected to the extension sections; and an encapsulant encapsulating the electronic component and the heat dissipation unit, wherein stress releasing sections are at least disposed at intersectional corners between the extension sections and the flat section so as to prevent projections from being formed by concentrated stresses in a punching process of the heat dissipation unit, thereby maintaining flatness of the flat section and further preventing circuits of the electronic component from being damaged due to a contact point produced between the electronic component and the flat section in a molding process.
摘要:
This invention discloses a semiconductor device and a method for fabricating the same. The method includes providing a flexible carrier board having a first surface and a second surface opposite thereto; forming a metal lead layer and a first heat dissipating metal layer on the first surface of the flexible carrier board, and forming a second heat dissipating metal layer on the second surface of the flexible carrier board; providing a chip having an active surface and an opposed non-active surface, wherein a plurality of solder pads are formed on the active surface of the chip, each of the solder pads has a metal bump formed thereon and corresponding in position to the metal lead layer, and heat dissipating bumps are formed between the metal bumps corresponding in position to the first heat dissipating metal layer.
摘要:
A cavity-down ball grid array package includes a substrate having a through cavity provided therein. A heat sink is attached to the substrate and a semiconductor chip in the cavity is attached to the heat sink and electrically connected to the substrate. A ball grid array is on the substrate and on the semiconductor chip.
摘要:
An externally-embedded heat-dissipating device is designed for use with a BGA (Ball Grid Array) IC package for dissipating the IC-produced heat during operation to the atmosphere. that can help further increase the efficiency of heat dissipation from the BGA IC package. The heat-dissipating device is characterized in that it can be externally embedded in the top surface of the encapsulant without having to be supported on the substrate, and also in that it can help reduce the heat path from the IC chip to the heat-dissipating device so that heat-dissipation efficiency can be further increased as compared to the prior art. Further, the heat-dissipating device can help reduce manufacture cycle time and cost and also help prevent delamination, flash, and popcorn effect that would otherwise occur in the case of the prior art. It also can help save layout space over the substrate for compact design of the package. Overall speaking, the proposed heat-dissipating device is more advantageous to use than the prior art.