Patents by Inventor Jiandi Du
Jiandi Du has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12347810Abstract: A semiconductor memory device includes first memory dies stacked one upon another and electrically connected one to another by first bond wires, and covered with a first encapsulant. Second memory dies are disposed above the first memory dies, stacked one upon another and electrically connected one to another with second bond wires, and covered with a second encapsulant. A control die may be mounted on the top die in the second die stack. Vertical bond wires extend between the stacked die modules. A redistribution layer is formed over the top die stack and the control die to allow for electrical communication with the memory device. The memory device allows for stacking memory dies in a manner that allows for increased memory capacity without increasing the package form factor.Type: GrantFiled: July 7, 2021Date of Patent: July 1, 2025Assignee: Western Digital Technologies, Inc.Inventors: Yazhou Zhang, Jiandi Du, Hope Chiu
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Patent number: 11901260Abstract: A thermoelectric semiconductor device includes a heat dissipating semiconductor module and a stack of flash memory dies mounted on a substrate. The heat dissipating module comprises a first semiconductor die such as a controller, and a second semiconductor die such as a thermoelectric semiconductor die to cool the first semiconductor die during operation. The thermoelectric semiconductor die may be mounted to the controller die at the wafer level.Type: GrantFiled: September 2, 2022Date of Patent: February 13, 2024Assignee: Western Digital Technologies, Inc.Inventors: Jiandi Du, Yazhou Zhang, Binbin Zheng, Sundarraj Chandran, Wenbin Qu, Chin-Tien Chiu
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Patent number: 11837476Abstract: A flip-chip package and a method for assembling a flip-chip package includes positioning the die on a substrate and introducing an underfill material into a space between the die and the substrate, where a portion of the underfill material extends beyond an edge of the die and forms a fillet that at least partially surrounds the die. The underfill material is cured, and a portion of the fillet is removed to reduce the area of the fillet.Type: GrantFiled: May 15, 2020Date of Patent: December 5, 2023Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Yazhou Zhang, Hope Chiu, Jiandi Du, Paul Qu
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Patent number: 11810896Abstract: A method and apparatus for substrate component layout and bonding for increased package capacity. According to certain embodiments, a wire-bonding finger strip is disposed between a flip-chip die and a NAND die stack to reduce a keep out zone (KOZ) required for an underfill material dispensed beneath the flip-chip die. To further inhibit the flow of the underfill material and further reduce the KOZ, a solder mask may be placed adjacent to the flip-chip. According to certain embodiments, there may be at least three sides of the flip-chip that may have such an adjacent solder mask placement. The three sides of the flip-chip according to such embodiments may be those non-adjacent to the wire-bonding finger strip.Type: GrantFiled: May 18, 2021Date of Patent: November 7, 2023Assignee: Western Digital Technologies, Inc.Inventors: Jiandi Du, Zengyu Zhou, Rui Yuan, Fen Yu, Hope Chiu
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Patent number: 11784135Abstract: A semiconductor device has shielding to prevent transmission and/or reception of EMI and/or RFI radiation. The semiconductor device comprises a substrate including grounded contact pads around a periphery of the substrate, exposed at one or more edges of the substrate. A bump made of gold or other non-oxidizing conductive material may be formed on the contact pads, for example using ultrasonic welding to remove an oxidation layer between the contact pads and the conductive bumps. The conductive bumps electrically couple to a conductive coating applied around the periphery of the semiconductor device.Type: GrantFiled: June 22, 2021Date of Patent: October 10, 2023Assignee: Western Digital Technologies, Inc.Inventors: Jiandi Du, Binbin Zheng, Rui Guo, Chin-Tien Chiu, Zengyu Zhou, Fen Yu
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Publication number: 20230011439Abstract: A semiconductor memory device includes first memory dies stacked one upon another and electrically connected one to another by first bond wires, and covered with a first encapsulant. Second memory dies are disposed above the first memory dies, stacked one upon another and electrically connected one to another with second bond wires, and covered with a second encapsulant. A control die may be mounted on the top die in the second die stack. Vertical bond wires extend between the stacked die modules. A redistribution layer is formed over the top die stack and the control die to allow for electrical communication with the memory device. The memory device allows for stacking memory dies in a manner that allows for increased memory capacity without increasing the package form factor.Type: ApplicationFiled: July 7, 2021Publication date: January 12, 2023Applicant: Western Digital Technologies, Inc.Inventors: Yazhou Zhang, Jiandi Du, Hope Chiu
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Publication number: 20220415750Abstract: A thermoelectric semiconductor device includes a heat dissipating semiconductor module and a stack of flash memory dies mounted on a substrate. The heat dissipating module comprises a first semiconductor die such as a controller, and a second semiconductor die such as a thermoelectric semiconductor die to cool the first semiconductor die during operation. The thermoelectric semiconductor die may be mounted to the controller die at the wafer level.Type: ApplicationFiled: September 2, 2022Publication date: December 29, 2022Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Jiandi Du, Yazhou Zhang, Binbin Zheng, Sundarraj Chandran, Wenbin Qu, Chin-Tien Chiu
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Publication number: 20220406726Abstract: A semiconductor device has shielding to prevent transmission and/or reception of EMI and/or RFI radiation. The semiconductor device comprises a substrate including grounded contact pads around a periphery of the substrate, exposed at one or more edges of the substrate. A bump made of gold or other non-oxidizing conductive material may be formed on the contact pads, for example using ultrasonic welding to remove an oxidation layer between the contact pads and the conductive bumps. The conductive bumps electrically couple to a conductive coating applied around the periphery of the semiconductor device.Type: ApplicationFiled: June 22, 2021Publication date: December 22, 2022Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Jiandi Du, Binbin Zheng, Rui Guo, Chin-Tien Chiu, Zengyu Zhou, Fen Yu
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Publication number: 20220375896Abstract: A method and apparatus for substrate component layout and bonding for increased package capacity. According to certain embodiments, a wire-bonding finger strip is disposed between a flip-chip die and a NAND die stack to reduce a keep out zone (KOZ) required for an underfill material dispensed beneath the flip-chip die. To further inhibit the flow of the underfill material and further reduce the KOZ, a solder mask may be placed adjacent to the flip-chip. According to certain embodiments, there may be at least three sides of the flip-chip that may have such an adjacent solder mask placement. The three sides of the flip-chip according to such embodiments may be those non-adjacent to the wire-bonding finger strip.Type: ApplicationFiled: May 18, 2021Publication date: November 24, 2022Inventors: Jiandi DU, Zengyu ZHOU, Rui YUAN, Fen YU, Hope CHIU
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Patent number: 11488883Abstract: A semiconductor device package includes a substrate, a heat-generating component positioned on a surface of the substrate, and an encapsulant at least partially covering the heat-generating component and having an outer surface. A first heat-conducting layer is disposed between the encapsulant and the first heat-generating component. One or more pillars are in contact with the first heat-conducting layer and extend to the outer surface of the encapsulant and contact a second heat-conducting layer disposed on the outer surface of the encapsulant.Type: GrantFiled: April 13, 2021Date of Patent: November 1, 2022Assignee: Western Digital Technologies, Inc.Inventors: Yazhou Zhang, Jiandi Du, Hope Chiu, Cong Zhang, Fen Yu, Ada Shen, Gary Zheng, Honny Chen
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Publication number: 20220328374Abstract: A semiconductor device package includes a substrate, a heat-generating component positioned on a surface of the substrate, and an encapsulant at least partially covering the heat-generating component and having an outer surface. A first heat-conducting layer is disposed between the encapsulant and the first heat-generating component. One or more pillars are in contact with the first heat-conducting layer and extend to the outer surface of the encapsulant and contact a second heat-conducting layer disposed on the outer surface of the encapsulant.Type: ApplicationFiled: April 13, 2021Publication date: October 13, 2022Applicant: Western Digital Technologies, Inc.Inventors: Yazhou Zhang, Jiandi Du, Hope Chiu, Cong Zhang, Fen Yu, Ada Shen, Gary Zheng, Honny Chen
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Patent number: 11444001Abstract: A thermoelectric semiconductor device includes a heat dissipating semiconductor module and a stack of flash memory dies mounted on a substrate. The heat dissipating module comprises a first semiconductor die such as a controller, and a second semiconductor die such as a thermoelectric semiconductor die to cool the first semiconductor die during operation. The thermoelectric semiconductor die may be mounted to the controller die at the wafer level.Type: GrantFiled: May 7, 2021Date of Patent: September 13, 2022Assignee: Western Digital Technologies, Inc.Inventors: Jiandi Du, Yazhou Zhang, Binbin Zheng, Sundarraj Chandran, Wenbin Qu, Chin-Tien Chiu
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Publication number: 20210335628Abstract: A flip-chip package and a method for assembling a flip-chip package includes positioning the die on a substrate and introducing an underfill material into a space between the die and the substrate, where a portion of the underfill material extends beyond an edge of the die and forms a fillet that at least partially surrounds the die. The underfill material is cured, and a portion of the fillet is removed to reduce the area of the fillet.Type: ApplicationFiled: May 15, 2020Publication date: October 28, 2021Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Yazhou Zhang, Hope Chiu, Jiandi Du, Paul Qu