摘要:
A semiconductor package with a heat sink is proposed, in which a chip has its first surface attached to a chip carrier, while a second surface of the chip is attached to a heat sink through an adhesive, allowing heat generated by the chip to be transmitted to the heat sink. Moreover, in a molding process, a molding resin is used to form an encapsulant for encapsulating the chip, while a top surface and side surfaces connected to the top surface of the heat sink are exposed to outside of the encapsulant, that is, the heat sink merely has its bottom surface bonded to the encapsulant. This makes the generated heat directly dissipated to the atmosphere through the heat sink. Furthermore, the top surface of the heat sink is coated with an interface layer, while adhesion between the interface layer and the molding resin is smaller than that between the heat sink and the encapsulant. This allows the molding resin remained on the interface layer to be easily removed after completing the molding process, while delamination can be prevented from occurrence between the heat sink or the chip and the encapsulant, and also the chip can be prevented from cracking due to clamping force generated during molding.
摘要:
A semiconductor package with a heat sink is provided in which at least one chip is mounted on the substrate and covered by a heat sink. The heat sink is formed with a flange in contact with the substrate, allowing a plurality of clip members to clamp the flange of the heat sink and the substrate. Each of the clip members has a recess portion for receiving the flange of the heat sink and the substrate to thereby firmly position the heat sink on the substrate. The clip members are engaged with edges of the heat sink and the substrate, thereby not affecting trace routability on the substrate. Moreover, the heat sink is mounted on the substrate and would not be dislocated.
摘要:
A heat dissipating package structure includes a chip carrier; a semiconductor chip mounted and electrically connected to the chip carrier; an encapsulant formed on the chip carrier and for encapsulating the chip, with a non-active surface of the chip being exposed from the encapsulant; and a heat spreader having a hollow portion and attached to the encapsulant, wherein the chip is received in the hollow portion and the non-active surface of the chip is completely exposed to the hollow portion, such that heat generated by the chip can be directly dissipated out of the package structure. The present invention also provides a method for fabricating the heat dissipating package structure.
摘要:
A multi-chip stack structure and a fabrication method thereof are proposed, including providing a leadframe having a die base and a plurality of leads and disposing a first and a second chips on the two surfaces of the die base respectively; disposing the leadframe on a heating block having a cavity in a wire bonding process with the second chip received in the cavity of the heating block; performing a first wire bonding process to electrically connect the first chip to the leads through a plurality of first bonding wires, and forming a bump on one side of the leads connected with the first bonding wires; disposing the leadframe in an upside down manner to the heating block via the bump with the first chip and the first bonding wires received in the cavity of the heating block; and performing a second wire bonding process to electrically connect the second chip to the leads through a plurality of second bonding wires. The bump is used for supporting the leads to a certain height so as to keep the bonding wires from contacting the heating block and eliminate the need of using a second heating block in the second wire bonding process of the prior art, thereby saving time and costs in a fabrication process. Also, as positions where the first and second bonding wires are bonded to the leads on opposite sides of the leadframe correspond with each other, the conventional problems of adversely affected electrical performance and electrical mismatch can be prevented.
摘要:
A semiconductor package with a heat dissipating device and a fabrication method of the semiconductor package are provided. A chip is mounted on a substrate. The heat dissipating device is mounted on the chip, and includes an accommodating room, and a first opening and a second opening that communicate with the accommodating room. An encapsulant is formed between the heat dissipating device and the substrate to encapsulate the chip. A cutting process is performed to remove a non-electrical part of structure and expose the first and second openings from the encapsulant. A cooling fluid is received in the accommodating room to absorb and dissipate heat produced by the chip. The heat dissipating device covers the encapsulant and the chip to provide a maximum heat transfer area for the semiconductor package.
摘要:
A semiconductor package on which a semiconductor device can be stacked and fabrication method thereof are provided. The fabrication method includes the steps of mounting and electrically connecting at least one semiconductor chip on the substrate, mounting an electrical connecting structure consisting of an upper layer circuit board and a lower layer circuit board on the substrate and electrically connecting the electrical connecting structure to the substrate, where the semiconductor chip is received in a receiving space formed in the electrical connecting structure; forming an encapsulant on the substrate encapsulating the semiconductor chip and the electrical connecting structure, and after the encapsulant is formed, exposing top surface of the upper layer circuit board with a plurality of solder pads from the encapsulant to allow at least one semiconductor device to electrically connect the upper layer circuit board so as to form a stack structure.
摘要:
A sensor semiconductor device and a manufacturing method thereof are disclosed. The method includes: providing a light-permeable carrier board with a plurality of metallic circuits; electrically connecting the metallic circuits to a plurality of sensor chips through conductive bumps formed on the bond pads of the sensor chips, wherein the sensor chips have been previously subjected to thinning and chip probing; filling a first dielectric layer between the sensor chips to cover the metallic circuits and peripheries of the sensor chips; forming a second dielectric layer on the sensor chips and the first dielectric layer; forming grooves between the sensor chips for exposing the metallic circuits such that a plurality of conductive traces electrically connected to the metallic circuits can be formed on the second dielectric layer; and singulating the sensor chips to form a plurality of sensor semiconductor devices. The present invention overcomes the drawbacks of breakage of trace connection due to a sharp angle formed at joints, poor electrical connection and chip damage due to an alignment error in cutting from the back of the wafer, as well as an increased cost due to multiple sputtering processes for forming traces.
摘要:
A sensor-type semiconductor device and manufacturing method thereof are disclosed. The method includes providing a wafer comprising a plurality of sensor chips; forming concave grooves between the solder pads formed on the active surface of adjacent sensor chips; filling a filling material into the concave grooves and forming first conductive circuits electrically connecting the solder pads of adjacent sensor chips; mounting a light permeable body on the active surface of the wafer and thinning the non-active surface of the wafer to expose the filling material; mounting the wafer on a carrier board with second conductive circuits formed thereon corresponding in position to the filling material; forming first openings by cutting the light permeable body and the wafer to a position at which the second conductive circuits are located; forming metallic layers in the first openings by electroplating, the metallic layers electrically connecting the first and second conductive circuits of adjacent sensor chips; forming second openings by cutting the metallic layers to break the first conductive circuit connections and the second conductive circuit connections of adjacent sensor chips and meanwhile keep the first and second conductive circuits of each sensor chip still electrically connected through the metallic layers; filling a dielectric material into the second openings and removing the carrier board; and separating each of the sensor chips to form a plurality of sensor-type semiconductor devices. The invention overcomes the drawbacks of the prior art such as slanting notches formed on the non-active surface of the wafer, displacement of the notches due to the difficulty in precise alignment, as well as broken joints caused by concentrated stress generated in the slanting notches and exposed circuits.
摘要:
A chip scale package structure and a method for fabricating the same are disclosed. The method includes forming metal pads on a predetermined part of a carrier; mounting chips on the carrier, each of the chips having a plurality of conductive bumps soldered to the metal pads; forming an encapsulant on the carrier to encapsulate the chips and the conductive bumps; removing the carrier to expose the metal pads and even the metal pads with a surface of the encapsulant; forming on the encapsulant a plurality of first conductive traces electrically connected to the metal pads; applying a solder mask on the first conductive traces, and forming a plurality of openings on the solder mask to expose a predetermined part of the first conductive traces; forming a plurality of conductive elements on the predetermined part; and cutting the encapsulant to form a plurality of chip scale package structures.
摘要:
A thermally enhanced semiconductor package and a fabrication method thereof are provided. A plurality of conductive bumps are formed on bond pads on an active surface of a chip. A heat sink is attached to an inactive surface of the chip and has a surface area larger than that of the chip. An encapsulation body encapsulates the heat sink, chip and conductive bumps, while exposing a bottom or surfaces, not for attaching the chip, of the heat sink and ends of the conductive bumps outside. A plurality of conductive traces are formed on the encapsulation body and electrically connected to the ends of the conductive bumps. A solder mask layer is applied over the conductive traces and formed with a plurality of openings for exposing predetermined portions of the conductive traces. A solder ball is implanted on each exposed portion of the conductive traces.