Patents by Inventor Wen Jer Tsai

Wen Jer Tsai 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).

  • Patent number: 9070588
    Abstract: A non-volatile memory structure, including a substrate, a plurality of stacked structures, a plurality of first conductive type doped regions, at least one second conductive type doped region, a conductive layer, and a first dielectric layer, is provided. The stacked structures are disposed on the substrate, and each of the stacked structures includes a charge storage structure. The first conductive type doped regions are disposed in the substrate under the corresponding charge storage structures respectively. The second conductive type doped region is disposed in the substrate between the adjacent charge storage structures and has an overlap region with each of the charge storage structures. The conductive layer covers the second conductive type doped region. The first dielectric layer is disposed between the conductive layer and the second conductive type doped region.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: June 30, 2015
    Assignee: MACRONIX International Co. Ltd.
    Inventors: Chih-Chieh Cheng, Shih-Guei Yan, Wen-Jer Tsai
  • Patent number: 9048263
    Abstract: A non-volatile memory and a manufacturing method thereof are provided. In this method, a first oxide layer having a protrusion is formed on a substrate. A pair of doped regions is formed in the substrate at two sides of the protrusion. A pair of charge storage spacers is formed on the sidewalls of the protrusion. A second oxide layer is formed on the first oxide layer and the pair of charge storage spacers. A conductive layer is formed on the second oxide layer, wherein the conductive layer is located completely on the top of the pair of charge storage spacers.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: June 2, 2015
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Chih-Chieh Cheng, Shih-Guei Yan, Cheng-Hsien Cheng, Wen-Jer Tsai
  • Patent number: 9018085
    Abstract: A method for fabricating a memory device of this invention includes at least the following steps. A tunnel dielectric layer is formed over a substrate. A gate is fowled over the tunnel dielectric layer. At least one charge storage layer is formed between the gate and the tunnel dielectric layer. Two doped regions are formed in the substrate beside the gate. A word line is formed on and electrically connected to the gate, wherein the word line having a thickness greater than a thickness of the gate.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: April 28, 2015
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Shih-Guei Yan, Wen-Jer Tsai, Cheng-Hsien Cheng
  • Patent number: 8981459
    Abstract: A semiconductor structure uses its control gate to be the wordline for receiving an operation voltage for the semiconductor structure. The semiconductor structure has a first and a second doped region and a buried channel between the first and the second doped region, wherein the buried channel has a first length along the first direction. The semiconductor structure further has a charge trapping layer stack on the buried channel and a conductive layer on the charge trapping layer stack, wherein the conductive layer extends along the first direction. The conductive layer is configured as both the control gate and the wordline of the semiconductor structure.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: March 17, 2015
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Shih-Guei Yan, Wen-Jer Tsai, Chih-Chieh Cheng
  • Patent number: 8976581
    Abstract: A non-volatile memory system includes a bit line and a plurality of memory cells associated with the bit line and coupled in a serial manner. The system further has a control circuitry in communication with the memory cells, wherein the control circuitry programs a target cell selected from the memory cells by applying a bit line voltage on the bit line in order to promote hot carrier injection into the target cell. The circuit also applies a programming voltage on the target cell under a hot carrier injection mechanism. Moreover, the circuit also applies a control voltage on a control cell, which is adjacent to the target cell when programming the target cell, wherein the control voltage is dependent on the threshold voltage of the control cell and the control voltage is less than the programming voltage.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: March 10, 2015
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Wen Jer Tsai, Ping Hung Tsai
  • Patent number: 8952440
    Abstract: Provided is a memory device including a first dielectric layer, a T-shaped gate, two charge storage layers and two second dielectric layers. The first dielectric layer is disposed on a substrate. The T-shaped gate is disposed on the first dielectric layer and has an upper gate and a lower gate, wherein two gaps are present respectively at both sides of the lower gate and between the upper gate and the substrate. The charge storage layers are respectively embedded into the gaps. A second dielectric layer is disposed between each charge storage layer and the upper gate, between each charge storage layer and the lower gate and between each charge storage layer and the substrate.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: February 10, 2015
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Shih-Guei Yan, Wen-Jer Tsai, Ping-Hung Tsai
  • Patent number: 8947939
    Abstract: A memory device includes a plurality of memory cells arranged in series in the semiconductor body, such as a NAND string, having a plurality of word lines. A selected memory cell is programmed by hot carrier injection. The program operation is based on metering a flow of carriers between a first semiconductor body region on a first side of the selected cell in the NAND string and a second semiconductor body region on a second side of the selected cell. A program potential higher than a hot carrier injection barrier level is applied to the selected cell, and then the drain to source voltage across the selected cell and the flow of carriers in the selected cell reach a level sufficient to support hot carrier injection, which is controlled by a switch cell adjacent the selected cell.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: February 3, 2015
    Assignee: Macronix International Co., Ltd.
    Inventors: Ping-Hung Tsai, Jyun-Siang Huang, Wen-Jer Tsai
  • Publication number: 20140346586
    Abstract: A non-volatile memory structure, including a substrate, a plurality of stacked structures, a plurality of first conductive type doped regions, at least one second conductive type doped region, a conductive layer, and a first dielectric layer, is provided. The stacked structures are disposed on the substrate, and each of the stacked structures includes a charge storage structure. The first conductive type doped regions are disposed in the substrate under the corresponding charge storage structures respectively. The second conductive type doped region is disposed in the substrate between the adjacent charge storage structures and has an overlap region with each of the charge storage structures. The conductive layer covers the second conductive type doped region. The first dielectric layer is disposed between the conductive layer and the second conductive type doped region.
    Type: Application
    Filed: August 13, 2014
    Publication date: November 27, 2014
    Inventors: Chih-Chieh Cheng, Shih-Guei Yan, Wen-Jer Tsai
  • Publication number: 20140306282
    Abstract: A memory structure includes a memory cell, and the memory cell includes following elements. A first gate is disposed on a substrate. A stacked structure includes a first dielectric structure, a channel layer, a second dielectric structure and a second gate disposed on the first gate, a first charge storage structure disposed in the first dielectric structure and a second charge storage structure disposed in the second dielectric structure. The first charge storage structure is a singular charge storage unit and the second charge storage structure comprises two charge storage units which are physically separated. A channel output line physically connected to the channel layer. A first dielectric layer is disposed on the first gate at two sides of the stacked structure. A first source or drain and a second source or drain are disposed on the first dielectric layer and located at two sides of the channel layer.
    Type: Application
    Filed: June 24, 2014
    Publication date: October 16, 2014
    Inventors: Cheng-Hsien Cheng, Wen-Jer Tsai, Shih-Guei Yan, Chih-Chieh Cheng, Jyun-Siang Huang
  • Publication number: 20140308791
    Abstract: A non-volatile memory and a manufacturing method thereof are provided. In this method, a first oxide layer having a protrusion is formed on a substrate. A pair of doped regions is formed in the substrate at two sides of the protrusion. A pair of charge storage spacers is formed on the sidewalls of the protrusion. A second oxide layer is formed on the first oxide layer and the pair of charge storage spacers. A conductive layer is formed on the second oxide layer, wherein the conductive layer is located completely on the top of the pair of charge storage spacers.
    Type: Application
    Filed: June 25, 2014
    Publication date: October 16, 2014
    Inventors: Chih-Chieh Cheng, Shih-Guei Yan, Cheng-Hsien Cheng, Wen-Jer Tsai
  • Patent number: 8861281
    Abstract: A method of programming a memory is provided. The memory has a first cell, having a first S/D region and a second S/D region shared with a second cell. The second cell has a third S/D region opposite to the second S/D region. When programming the first cell, a first voltage is applied to a control gate of the first cell, a second voltage is applied to a control gate of the second cell to slightly turn on a channel of the second cell, a third and a fourth voltage are respectively applied to the first and the third S/D regions, and the second S/D region is floating. A carrier flows from the third S/D region to the first S/D region, and is injected into a charge storage layer of the first cell by source-side injection.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: October 14, 2014
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Ping-Hung Tsai, Jyun-Siang Huang, Wen-Jer Tsai
  • Patent number: 8842479
    Abstract: A memory device includes a plurality of memory cells arranged in series in the semiconductor body, such as a NAND string, having a plurality of word lines. A selected memory cell is programmed by hot carrier injection. The program operation is based on metering a flow of carriers between a first semiconductor body region on a first side of the selected cell in the NAND string and a second semiconductor body region on a second side of the selected cell. A program potential higher than a hot carrier injection barrier level is applied to the selected cell, and then the drain to source voltage across the selected cell and the flow of carriers in the selected cell reach a level sufficient to support hot carrier injection, which is controlled by a combination of a switch cell adjacent the selected cell and modulation of a source side voltage applied to the NAND string.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: September 23, 2014
    Assignee: Macronix International Co., Ltd.
    Inventors: Jyun-Siang Huang, Wen-Jer Tsai, Ping-Hung Tsai
  • Publication number: 20140269076
    Abstract: A non-volatile memory system includes a bit line and a plurality of memory cells associated with the bit line and coupled in a serial manner. The system further has a control circuitry in communication with the memory cells, wherein the control circuitry programs a target cell selected from the memory cells by applying a bit line voltage on the bit line in order to promote hot carrier injection into the target cell. The circuit also applies a programming voltage on the target cell under a hot carrier injection mechanism. Moreover, the circuit also applies a control voltage on a control cell, which is adjacent to the target cell when programming the target cell, wherein the control voltage is dependant on the threshold voltage of the control cell and the control voltage is less than the programming voltage.
    Type: Application
    Filed: April 2, 2013
    Publication date: September 18, 2014
    Applicant: MACRONIX International Co., Ltd.
    Inventors: WEN JER TSAI, PING HUNG TSAI
  • Publication number: 20140264543
    Abstract: A semiconductor structure uses its control gate to be the wordline for receiving an operation voltage for the semiconductor structure. The semiconductor structure has a first and a second doped region and a buried channel between the first and the second doped region, wherein the buried channel has a first length along the first direction. The semiconductor structure further has a charge trapping layer stack on the buried channel and a conductive layer on the charge trapping layer stack, wherein the conductive layer extends along the first direction. The conductive layer is configured as both the control gate and the wordline of the semiconductor structure.
    Type: Application
    Filed: April 24, 2013
    Publication date: September 18, 2014
    Applicant: Macronix International Co., Ltd.
    Inventors: Shih-Guei Yan, Wen-Jer Tsai, Chih-Chieh Cheng
  • Patent number: 8835297
    Abstract: A fabricating method for fabricating a non-volatile memory structure including the following steps is provided. A first conductive type doped layer is formed in a substrate. A plurality of stacked structures is formed on the substrate, and each of the stacked structures includes a charge storage structure. A first dielectric layer is formed on the substrate between the adjacent stacked structures. A second conductive type doped region is formed in the substrate between the adjacent charge storage structures. The second conductive type doped region has an overlap region with each of the charge storage structures. In addition, the second conductive type doped region divides the first conductive type doped layer into a plurality of first conductive type doped regions that are separated from each other. A conductive layer is formed on the first dielectric layer.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: September 16, 2014
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Chih-Chieh Cheng, Shih-Guei Yan, Wen-Jer Tsai
  • Publication number: 20140239370
    Abstract: Provided is a memory device including a first dielectric layer, a T-shaped gate, two charge storage layers and two second dielectric layers. The first dielectric layer is disposed on a substrate. The T-shaped gate is disposed on the first dielectric layer and has an upper gate and a lower gate, wherein two gaps are present respectively at both sides of the lower gate and between the upper gate and the substrate. The charge storage layers are respectively embedded into the gaps. A second dielectric layer is disposed between each charge storage layer and the upper gate, between each charge storage layer and the lower gate and between each charge storage layer and the substrate.
    Type: Application
    Filed: February 22, 2013
    Publication date: August 28, 2014
    Applicant: MACRONIX International Co., Ltd.
    Inventors: Shih-Guei Yan, Wen-Jer Tsai, Ping-Hung Tsai
  • Patent number: 8796754
    Abstract: A memory structure including a memory cell is provided, and the memory cell includes following elements. A first gate is disposed on a substrate. A stacked structure includes a first dielectric structure, a channel layer, a second dielectric structure and a second gate disposed on the first gate, a first charge storage structure disposed in the first dielectric structure and a second charge storage structure disposed in the second dielectric structure. At least one of the first charge storage structure and the second charge storage structure includes two charge storage units which are physically separated. A first dielectric layer is disposed on the first gate at two sides of the stacked structure. A first source and drain and a second source and drain are disposed on the first dielectric layer and located at two sides of the channel layer.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: August 5, 2014
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Cheng-Hsien Cheng, Wen-Jer Tsai, Shih-Guei Yan, Chih-Chieh Cheng, Jyun-Siang Huang
  • Publication number: 20140209992
    Abstract: A fabricating method for fabricating a non-volatile memory structure including the following steps is provided. A first conductive type doped layer is formed in a substrate. A plurality of stacked structures is formed on the substrate, and each of the stacked structures includes a charge storage structure. A first dielectric layer is formed on the substrate between the adjacent stacked structures. A second conductive type doped region is formed in the substrate between the adjacent charge storage structures. The second conductive type doped region has an overlap region with each of the charge storage structures. In addition, the second conductive type doped region divides the first conductive type doped layer into a plurality of first conductive type doped regions that are separated from each other. A conductive layer is formed on the first dielectric layer.
    Type: Application
    Filed: January 25, 2013
    Publication date: July 31, 2014
    Applicant: MACRONIX INTERNATIONAL CO., LTD.
    Inventors: Chih-Chieh Cheng, Shih-Guei Yan, Wen-Jer Tsai
  • Patent number: 8791522
    Abstract: A non-volatile memory and a manufacturing method thereof are provided. A first oxide layer having a protrusion is formed on a substrate. A pair of doped regions is formed in the substrate at two sides of the protrusion. A pair of charge storage spacers is formed on the sidewalls of the protrusion. A second oxide layer is formed on the first oxide layer and the charge storage spacers. A conductive layer is formed on the second oxide layer.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: July 29, 2014
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Chih-Chieh Cheng, Shih-Guei Yan, Cheng-Hsien Cheng, Wen-Jer Tsai
  • Publication number: 20140187032
    Abstract: A method for fabricating a memory device of this invention includes at least the following steps. A tunnel dielectric layer is formed over a substrate. A gate is fowled over the tunnel dielectric layer. At least one charge storage layer is formed between the gate and the tunnel dielectric layer. Two doped regions are formed in the substrate beside the gate. A word line is formed on and electrically connected to the gate, wherein the word line having a thickness greater than a thickness of the gate.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 3, 2014
    Applicant: MACRONIX International Co., Ltd.
    Inventors: Shih-Guei Yan, Wen-Jer Tsai, Cheng-Hsien Cheng