Abstract: A ground-enhanced semiconductor package and a lead frame used in the package are provided. The semiconductor package includes a lead frame having a die pad, a plurality of tie bars connected with and supporting the die pad, a plurality of leads surrounding the die pad, and a ground structure, wherein the ground structure comprises at least one of first ground portions connected to the tie bars, and/or at least one of second ground portions connected to the die pad, and wherein the first ground portions are separate from each other, and the second ground portions are separate from each other; at least one chip mounted on the die pad and electrically connected to the leads and the ground structure; and an encapsulation body for encapsulating the chip and the lead frame. The separately-arranged ground portions allow thermal stresses to be released from the ground structure without rendering deformation issues.

Abstract: A wire-bonding method and a semiconductor package using the same are provided. The semiconductor package includes a carrier; a chip mounted on the carrier; a plurality of first wires and second wires alternatively arranged in a stagger manner, with a wire loop of each second wire being downwardly bent to form a deformed portion so as to provide a height different between the wire loops of each first wire and each second wire, wherein the first and second wires electrically connect the chip to the carrier; and an encapsulant for encapsulating the chip, the first wires, the second wires and a portion of the carrier. The height difference between the wire loops of each first wire and each second wire increases a pitch between adjacent first and second wires thereby preventing the wires from contact and short circuit with each other due to wire sweep during an encapsulation process.

Abstract: A wire-bonding method and a semiconductor package using the same are provided. The semiconductor package includes a carrier; a chip mounted on the carrier; a plurality of first wires and second wires alternatively arranged in a stagger manner, with a wire loop of each second wire being downwardly bent to form a deformed portion so as to provide a height different between the wire loops of each first wire and each second wire, wherein the first and second wires electrically connect the chip to the carrier; and an encapsulant for encapsulating the chip, the first wires, the second wires and a portion of the carrier. The height difference between the wire loops of each first wire and each second wire increases a pitch between adjacent first and second wires thereby preventing the wires from contact and short circuit with each other due to wire sweep during an encapsulation process.

Abstract: A lead-frame-based semiconductor package and a fabrication method thereof are proposed. The semiconductor package includes: a lead frame having a plurality of first and second leads, wherein each first lead is formed with an extending portion smaller in thickness than the first lead in a manner that, an upper surface of the extending portion is flush with an upper surface of the first lead, and a lower surface of the extending portion forms a height difference with respect to a lower surface of the first lead; a chip mounted over the upper surfaces of the extending portions, and electrically connected to the leads by bonding wires; an encapsulant for encapsulating the upper surfaces of leads, upper surfaces of extending portions, chip and bonding wires; and a non-conductive material applied over the lower surfaces of extending portions, wherein the lower surfaces of leads are exposed to outside of the non-conductive material.

Abstract: A wire-bonding method and a semiconductor package using the same are provided. The semiconductor package includes a carrier; a chip mounted on the carrier; a plurality of first wires and second wires alternatively arranged in a stagger manner, with a wire loop of each second wire being downwardly bent to form a deformed portion so as to provide a height different between the wire loops of each first wire and each second wire, wherein the first and second wires electrically connect the chip to the carrier; and an encapsulant for encapsulating the chip, the first wires, the second wires and a portion of the carrier. The height difference between the wire loops of each first wire and each second wire increases a pitch between adjacent first and second wires thereby preventing the wires from contact and short circuit with each other due to wire sweep during an encapsulation process.

Abstract: A lead-frame-based semiconductor package and a fabrication method thereof are proposed. The semiconductor package includes: a lead frame having a plurality of first and second leads, wherein each first lead is formed with an extending portion smaller in thickness than the first lead in a manner that, an upper surface of the extending portion is flush with an upper surface of the first lead, and a lower surface of the extending portion forms a height difference with respect to a lower surface of the first lead; a chip mounted over the upper surfaces of the extending portions, and electrically connected to the leads by bonding wires; an encapsulant for encapsulating the upper surfaces of leads, upper surfaces of extending portions, chip and bonding wires; and a non-conductive material applied over the lower surfaces of extending portions, wherein the lower surfaces of leads are exposed to outside of the non-conductive material.

Abstract: A ground-enhanced semiconductor package and a lead frame used in the package are provided. The semiconductor package includes a lead frame having a die pad, a plurality of tie bars connected with and supporting the die pad, a plurality of leads surrounding the die pad, and a ground structure, wherein the ground structure comprises at least one of first ground portions connected to the tie bars, and/or at least one of second ground portions connected to the die pad, and wherein the first ground portions are separate from each other, and the second ground portions are separate from each other; at least one chip mounted on the die pad and electrically connected to the leads and the ground structure; and an encapsulation body for encapsulating the chip and the lead frame. The separately-arranged ground portions allow thermal stresses to be released from the ground structure without rendering deformation issues.

Abstract: A leadframe-based non-leaded semiconductor package and method of fabricating the same is proposed, which is used for the fabrication of a non-leaded type of semiconductor package, such as QFN (Quad Flat No-lead) package. The proposed semiconductor packaging technology is characterized by the provision of a recessed portion in the paddle portion of the leadframe to help secure the encapsulation body more firmly in position without delamination, as well as help lower the position of the packaged chip to help prevent the bonding wires from being exposed to the outside of the encapsulation body. These features can help the finished package to be more reliable with increased good yield.

Abstract: A lead-frame-based semiconductor package and a fabrication method thereof are proposed. The semiconductor package includes: a lead frame having a plurality of first and second leads, wherein each first lead is formed with an extending portion smaller in thickness than the first lead in a manner that, an upper surface of the extending portion is flush with an upper surface of the first lead, and a lower surface of the extending portion forms a height difference with respect to a lower surface of the first lead; a chip mounted over the upper surfaces of the extending portions, and electrically connected to the leads by bonding wires; an encapsulant for encapsulating the upper surfaces of leads, upper surfaces of extending portions, chip and bonding wires; and a non-conductive material applied over the lower surfaces of extending portions, wherein the lower surfaces of leads are exposed to outside of the non-conductive material.

Abstract: A lead-frame-based semiconductor package and a fabrication method thereof are proposed. The semiconductor package includes: a lead frame having a plurality of first and second leads, wherein each first lead is formed with an extending portion smaller in thickness than the first lead in a manner that, an upper surface of the extending portion is flush with an upper surface of the first lead, and a lower surface of the extending portion forms a height difference with respect to a lower surface of the first lead; a chip mounted over the upper surfaces of the extending portions, and electrically connected to the leads by bonding wires; an encapsulant for encapsulating the upper surfaces of leads, upper surfaces of extending portions, chip and bonding wires; and a non-conductive material applied over the lower surfaces of extending portions, wherein the lower surfaces of leads are exposed to outside of the non-conductive material.