摘要:
A photosensitive semiconductor package, a method for fabricating the same, and a lead frame thereof are proposed. The lead frame has a die pad and a plurality of leads, wherein at least one recessed portion is formed at an end of each lead close to the die pad, and at least one recessed region is formed on the die pad. An encapsulant fills the recessed portions, the recessed region, and between the leads and the die pad, and is formed on the lead frame to define a chip receiving cavity. A photosensitive chip is mounted in the chip receiving cavity, wherein at least partially a non-active surface of the chip is attached to the encapsulant filling the recessed region and is not in contact with the recessed region. A light-penetrable unit is attached to the encapsulant formed on the lead frame to seal the chip receiving cavity.
摘要:
A chip carrier for a semiconductor chip is provided. A plurality of solder pads for bump soldering are formed on a chip mounting surface of the chip carrier, to allow a flip chip to be mounted and electrically connected to the chip carrier. A solder mask layer is formed on the chip carrier, wherein a plurality of openings are provided in the solder mask layer to expose the solder pads, and an outwardly opening extended portion is formed respectively from the openings corresponding to the solder pads having a relatively narrower pitch therebetween, so as to prevent formation of voids during an underfill process for filing a gap between the flip chip and the chip carrier.
摘要:
A heat sink with a collapse structure and a semiconductor device with the heat sink are proposed, in which the heat sink is in ladder-like shape due to a height difference formed between an extending portion and an body of the heat sink, and the body has at least one surface exposed to outside of the semiconductor package. The extending portion produces collapse deformation in response to stress from engagement of molds in a molding process, so as to prevent a semiconductor chip from being damaged by the stress. The heat sink directly attached to the chip allows heat generated by the chip to pass through the extending portion to the body of the heat sink, and then the heat can be dissipated through the exposed surface of the body to the outside of the semiconductor package, so as to improve the heat dissipating efficiency.
摘要:
A method of fabricating BGA (Ball Grid Array) packages is proposed, which utilizes a specially-designed carrier to serve as an auxiliary tool to package semiconductor chips on substrates. The carrier is formed with a plurality of cavities respective for receiving a substrate and in communication with an injection gate, such that no injection gate is required on the substrate, thereby not restricting the trace routability on the substrate. Moreover, a two-piece type of mold is allowed being used to form a number of encapsulation bodies at one time, making the fabrication more productive and cost-effective. Furthermore, the proposed BGA fabrication method can be implemented without having to provide an air outlet in the substrate but allows the resulted encapsulation body to be free of voids to assure the quality of the packages. The proposed BGA fabrication method is therefore more advantageous to use than the prior art.
摘要:
A stacked dual-chip semiconductor packaging technology is proposed for the packaging of two semiconductor chips in one single package unit. The proposed dual-chip semiconductor package is characterized by an intercrossedly-stacked dual-chip arrangement which is constructed on a specially-designed leadframe having a supporting frame; a die pad supported on the supporting frame and having a peripherally-located upper portion and a centrally-located downset portion; and a set of leads linked to the supporting frame and arranged around the die pad. By the proposed packaging technology, a first semiconductor chip is mounted within the downset portion of the die pad, while a second semiconductor chip is mounted on the upper portion of the die pad in an intercrossedly-stacked manner in relation to the first semiconductor chip. Compared to the prior art, the proposed technology allows the packaging process to be implemented in a less complex and more cost-effective manner. Moreover, since the underlying chip is attached to die pad, it allows an increased heat-dissipation efficiency to the semiconductor package.
摘要:
A dual-chip integrated circuit package with unaligned chip arrangement and a method of manufacturing such a dual-chip integrated circuit package are provided. The dual-chip integrated circuit package includes a leadframe having a first set of leads and a second set of leads. The dual-chip integrated circuit package is used to pack two integrated circuit chips in an unaligned chip arrangement, in which the first integrated circuit chip is mounted to one side of the inner part of the first set of leads, and the second integrated circuit chip is mounted to the other side of the same in such a manner as to allow the bonding pads on the second integrated circuit chip to be positioned in the spacing formed between the two sets of leads. This unaligned chip arrangement can help facilitate the wire-bonding process for the bonding pads on the second integrated circuit chip. An encapsulant is used for encapsulating the first integrated circuit chip, the second integrated circuit chip, the first set of bonding wires, the second set of bonding wires, the inner part of the first set of leads, and the inner part of the second set of leads. The particular structure of the dual-chip integrated circuit package allows no restriction to the relative size between the two integrated circuit chips, thus allowing flexible selection for the combination of the two integrated circuit chips. Moreover, the dual-chip integrated circuit package can help save layout space on the circuit board and offers more functionality and storage capacity.
摘要:
A dual-die integrated circuit package is provided, which can be used to pack two semiconductor dies in the same package unit. These two semiconductor dies are of the type having an array of bonding pads formed thereon. The dual-die integrated circuit package has a first leadframe and a second leadframe, each having a die pad and a plurality of leads, with the die pad being arranged at a different elevation with respect to the leads. The two semiconductor dies are mounted on the respective die pads of the two leadframes, with the bottom surface of each semiconductor die facing the bottom surface of the other, allowing the bottom surface of one semiconductor die to be separated from the die pad of the first leadframe and the bottom surface of the other semiconductor die to be separated from the die pad of the second leadframe. This dual-die integrated circuit package structure can help prevent the interface between the semiconductor die and the die pad from delamination and eliminate contamination to the semiconductor dies and also allows the manufacture to be more cost-effective to implement than the prior art.
摘要:
A semiconductor package is proposed, in which at least one chip is mounted on a substrate, and at least one die-attach region is formed on the substrate. A plurality of thermal vias formed in the die-attach region and penetrating the substrate, in a manner that the thermal vias each has a top end connected to the chip mounted on the substrate and a bottom end connected to a thermal pad formed beneath the substrate at a position corresponding to the die-attach region. The thermal pad has a surface directly exposed to the atmosphere, allowing heat generated by the chip to be dissipated through the thermal vias and the exposed surface of the thermal pad to the atmosphere, so as to significantly improve heat dissipating efficiency for the semiconductor package.
摘要:
A semiconductor device package fabrication method is proposed, which is used for the fabrication of a semiconductor device package of the type having a core-hollowed portion that is typically used to house an optically-sensitive semiconductor device such as an image sensor or an ultraviolet-sensitive EPROM (Electrically-Programmable Read-Only Memory) device. The proposed method is characterized in the use of a support pillar, which is positioned beneath the lead frame when the lead frame is clamped between a top inserted mold and a bottom cavity mold, to help prevent resin flash on the lead frame during the molding of the core-hollowed portion. As a result, the proposed method can help strengthen the bonding of the semiconductor device on the die pad as well as the wire bonding on the inner end of the finger portion of the lead frame, Moreover, since the making of the support pillar would be significantly cheaper and easier to implement than the use of an organic high-molecule coating and a solvent as in the case of the prior art flash prevention, the proposed method is more cost-effective and environmentally-friendly to use than the prior art.
摘要:
Conventional configuration of a lead frame, particularly a lead frame in a Lead-on-Chip package, is substituted by one having inward ends of leads thereof arranged in unprecedented ways, resulting in bigger gap between any two adjacent inward ends of inner leads, leading to bigger Inner Lead Pitch of a lead frame in which the space available is inherently limited. It is by the new configuration that an IC packaging process can be immunized against the difficulty resulting from too small Inner Lead Pitch of a lead frame, and the bottle neck in the process of packaging an IC subject to the tendency of minimizing the size of an IC can thus be overcome.