04-01-2018 дата публикации
Номер: US20180005973A1
Принадлежит:
A semiconductor package structure comprises a substrate, a die bonded to the substrate, and one or more stud bump structures connecting the die to the substrate, wherein each of the stud bump structures having a stud bump and a solder ball encapsulating the stud bump to enhance thermal dissipation and reduce high stress concentrations in the semiconductor package structure. 116.-. (canceled)17. A method of forming a stud bump structure in a package structure , comprising:providing a conductive wire;pressing one end of the conductive wire to a bond pad and melting the conductive wire end to form a stud bump on the bond pad;severing the other end of the conductive wire close above the stud bump; andsoldering a solder ball to a top surface of the stud bump, the solder ball encapsulating the stud bump.18. The method of forming a stud bump structure of claim 17 , wherein the conductive wire comprises aluminum claim 17 , aluminum alloy claim 17 , copper claim 17 , copper alloy claim 17 , gold claim 17 , or gold alloy.19. The method of forming a stud bump structure of claim 17 , wherein the pressing and melting the conductive wire to form a stud bump on the bond pad is performed by wire bonding tool.20. The method of forming a stud bump structure of claim 17 , wherein the pressing and melting the conductive wire to form a stud bump on the bond pad is performed by a stud bump bonder.21. The method of forming a stud bump structure of claim 17 , wherein the severing the other end of the conductive wire leaves a tail extending from the bond pad.22. The method of forming a stud bump structure of claim 17 , further comprising applying ultrasonic energy to form the stud bump.23. The method of forming a stud bump structure of claim 17 , wherein the stud bump is disposed at a corner of a die.24. A method for forming a package structure claim 17 , the method comprising:providing a die wherein the die has a first periphery region adjacent a first edge of the die and a second ...
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