Patents by Inventor Shenqing Fang

Shenqing Fang 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).

  • Publication number: 20120181591
    Abstract: An electronic device includes a substrate with a semiconducting surface having a plurality of fin-type projections coextending in a first direction through a memory cell region and select gate regions. The electronic device further includes a dielectric isolation material disposed in spaces between the projections. In the electronic device, the dielectric isolation material in the memory cell regions have a height less than a height of the projections in the memory cell regions, and the dielectric isolation material in the select gate regions have a height greater than or equal to than a height of the projections in the select gate regions. The electronic device further includes gate features disposed on the substrate within the memory cell region and the select gate regions over the projections and the dielectric isolation material, where the gate features coextend in a second direction transverse to the first direction.
    Type: Application
    Filed: January 13, 2011
    Publication date: July 19, 2012
    Applicant: Spansion LLC
    Inventors: Chun CHEN, Shenqing Fang
  • Publication number: 20120168847
    Abstract: A memory array includes a plurality of bit lines and a plurality of word lines, a gate region, and a charge trapping layer. The charge trapping layer is wider than a word line; the charge trapping layer is extended beyond the edge of the gate region to facilitate capturing and removing charges.
    Type: Application
    Filed: December 30, 2010
    Publication date: July 5, 2012
    Inventors: Shenqing FANG, Tung-Sheng CHEN, Chun CHEN
  • Patent number: 8208296
    Abstract: A method and apparatus for storing information is provided. A core region of memory includes a semiconductor layer, at least one shallow trench, an insulator, and a charge-trapping layer. The semiconductor layer includes at least one source/drain region, and the insulator disposed above the source/drain region. The charge trapping layer is within the insulator, and the charge trapping layer is above the entire width of the source/drain region, and extends at least one angstrom beyond the width of the source/drain region, so that a portion the charge trapping layer extends into at least one shallow trench.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: June 26, 2012
    Assignee: Spansion LLC
    Inventors: Timothy Thurgate, Shenqing Fang, Kuo Tung Chang, Youseok Suh
  • Publication number: 20120153377
    Abstract: Embodiments of the present technology are directed toward gate sidewall engineering of field effect transistors. The techniques include formation of a blocking dielectric region and nitridation of a surface thereof. After nitridation of the blocking dielectric region, a gate region is formed thereon and the sidewalls of the gate region are oxidized to round off gate sharp corners and reduce the electrical field at the gate corners.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 21, 2012
    Inventors: Shenqing FANG, Tung-Sheng CHEN
  • Publication number: 20120156876
    Abstract: A method for double patterning is disclosed. In one embodiment the formation a pair of select gate wordlines on either side of a plurality of core wordlines begins by placing a spacer pattern around edges of a photoresist pattern is disclosed. The photoresist pattern is stripped away leaving the spacer pattern. A trim mask is placed over a portion of the spacer pattern. Portions of the spacer pattern are etched away that are not covered by the trim mask. The trim mask is removed, wherein first remaining portions of the spacer pattern define a plurality of core wordlines. A pad mask is placed such that the pad mask and second remaining portions of the spacer pattern define a select gate wordline on either side of the plurality of core wordlines. Finally at least one pattern transfer layer is etched through using the mad mask and the first and second remaining portions of the spacer pattern to etch the select gate wordlines and the plurality of core wordlines into a poly silicon layer.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 21, 2012
    Inventors: Tung-Sheng CHEN, Shenqing FANG
  • Publication number: 20120156856
    Abstract: Embodiments of the present technology are directed toward charge trapping region process margin engineering for charge trapping field effect transistor. The techniques include forming a plurality of shallow trench isolation regions on a substrate, wherein the tops of the shallow trench isolation regions extend above the substrate by a given amount. A portion of the substrate is oxidized to form a tunneling dielectric region. A first set of one or more nitride layers are deposited on the tunneling dielectric region and shallow trench isolation regions, wherein a thickness of the first set of nitride layers is approximately half of the given amount that the tops of the shallow trench isolation regions extend above the substrate. A portion of the first set of nitride layers is etched back to the tops of the trench isolation regions. A second set of one or more nitride layers is deposited on the etched back first set of nitride layers.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 21, 2012
    Inventors: Tung-Sheng CHEN, Shenqing FANG
  • Patent number: 8202779
    Abstract: Methods for fabricating a semiconductor memory cell that has a spacer layer are disclosed. A method includes forming a plurality of source/drain regions in a substrate where the plurality of source/drain regions are formed between trenches, forming a first oxide layer above the plurality of source/drain regions and in the trenches, forming a charge storage layer above the oxide layer and separating the charge storage layer in the trenches where a space is formed between separated portions of the charge storage layer. The method further includes forming a spacer layer to fill the space between the separated portions of the charge storage layer and to rise a predetermined distance above the space. A second oxide layer is formed above the charge storage layer and the spacer layer and a polysilicon layer is formed above the second oxide layer.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: June 19, 2012
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Angela Hui, Gang Xue, Alexander Nickel, Kashmir Sahota, Scott Bell, Chun Chen, Wai Lo
  • Publication number: 20120142175
    Abstract: A method and manufacture for memory device fabrication is provided. In one embodiment, at least one oxide-nitride spacer is formed as follows. An oxide layer is deposited over a flash memory device such that the deposited oxide layer is at least 250 Angstroms thick. The flash memory device includes a substrate and dense array of word line gates with gaps between each of the word lines gate in the dense array. Also, the deposited oxide layer is deposited such that it completely gap-fills the gaps between the word line gates of the dense array of word line gates. Next, a nitride layer is depositing over the oxide layer. Then, the nitride layer is etched until the at least a portion of the oxide layer is exposed. Next, the oxide layer is etched until at least a portion of the substrate is exposed.
    Type: Application
    Filed: December 3, 2010
    Publication date: June 7, 2012
    Applicant: Spansion LLC
    Inventors: Angela T. HUI, Shenqing Fang
  • Patent number: 8143661
    Abstract: A memory cell system is provided including a first insulator layer over a semiconductor substrate, a charge trap layer over the first insulator layer, and slot where the charge trap layer includes a second insulator layer having the characteristic of being grown.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: March 27, 2012
    Assignees: Spansion LLC, Advanced Micro Devices, Inc.
    Inventors: Shenqing Fang, Rinji Sugino, Jayendra Bhakta, Takashi Orimoto, Hiroyuki Nansei, Yukio Hayakawa, Takayuki Maruyama, Hidehiko Shiraiwa, Kuo-Tung Chang, Lei Xue, Meng Ding, Amol Ramesh Joshi, YouSeok Suh, Harpreet Sachar
  • Publication number: 20120056260
    Abstract: A memory and method of manufacture employing word line scaling. A layered stack, including a charge trapping component and a core polysilicon layer, is formed on a core section and a peripheral section of a substrate. A portion of the layered stack, including the core polysilicon layer is then removed from the peripheral section. A peripheral polysilicon layer, which is thicker than the core polysilicon layer of the layered stack, is next formed on the layered stack and the peripheral section. The layered stack is then isolated from the peripheral polysilicon layer by removing a portion of the peripheral polysilicon layer from the core section, and polysilicon lines are patterned in the isolated layered stack.
    Type: Application
    Filed: November 10, 2011
    Publication date: March 8, 2012
    Applicant: Spansion LLC
    Inventors: Shenqing Fang, Chun Chen, Wenmei Li, Inkuk Kang, Gang Xue, Hyesook Hong
  • Patent number: 8076199
    Abstract: A memory and method of manufacture employing word line scaling. A layered stack, including a charge trapping component and a core polysilicon layer, is formed on a core section and a peripheral section of a substrate. A portion of the layered stack, including the core polysilicon layer is then removed from the peripheral section. A peripheral polysilicon layer, which is thicker than the core polysilicon layer of the layered stack, is next formed on the layered stack and the peripheral section. The layered stack is then isolated from the peripheral polysilicon layer by removing a portion of the peripheral polysilicon layer from the core section, and polysilicon lines are patterned in the isolated layered stack.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: December 13, 2011
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Chun Chen, Wenmei Li, Inkuk Kang, Gang Xue, Hyesook Hong
  • Publication number: 20110272775
    Abstract: A semiconductor fabrication system and method are presented. A three dimensional multilayer integrated circuit fabrication method can include forming a first device layer and forming a second device layer on top of the first device layer with minimal detrimental heat transfer to the first layer by utilizing a controlled laser layer formation annealing process. A controlled laser crystallization process can be utilized and the controlled laser can include creating an amorphous layer; defining a crystallization area in the amorphous layer, where in the crystallization area is defined to promote single crystal growth (i.e. prevent multi-crystalline growth); and applying laser to the crystallization area, wherein the laser is applied in a manner that prevents undesired heat transfer to another layer.
    Type: Application
    Filed: July 14, 2011
    Publication date: November 10, 2011
    Inventors: Eunha KIM, Jeremy WAHL, Shenqing FANG, YouSeok SUH, Kuo-Tung CHANG, Yi MA, Rinji SUGINO, Jean YANG
  • Patent number: 8035153
    Abstract: A method for fabricating a memory device with a self-aligned trap layer which is optimized for scaling is disclosed. In the present invention, a non-conformal film is deposited over the charge trapping layer to form a thick film on top of the core source/drain region and a pinch off and a void or a narrow channel at the top of the STI trench. An etch is performed on the non-conformal film to open pinch-off or widen the narrow channel in the non-conformal. The trapping layer is then completely or partially etched between the core cells. The non-conformal film is removed. And a top oxide is formed. The top oxide converts the remaining trap layer to oxide if the trapping layer is partially etched and thus isolate the trap layer.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: October 11, 2011
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Jihwan Choi, Calvin Gabriel, Fei Wang, Angela Hui, Alexander Nickel, Zubin Patel, Phillip Jones, Mark Chang, Minh-Van Ngo
  • Publication number: 20110233647
    Abstract: Methods for fabricating a semiconductor memory cell that has a spacer layer are disclosed. A method includes forming a plurality of source/drain regions in a substrate where the plurality of source/drain regions are formed between trenches, forming a first oxide layer above the plurality of source/drain regions and in the trenches, forming a charge storage layer above the oxide layer and separating the charge storage layer in the trenches where a space is formed between separated portions of the charge storage layer. The method further includes forming a spacer layer to fill the space between the separated portions of the charge storage layer and to rise a predetermined distance above the space. A second oxide layer is formed above the charge storage layer and the spacer layer and a polysilicon layer is formed above the second oxide layer.
    Type: Application
    Filed: September 27, 2010
    Publication date: September 29, 2011
    Inventors: Shenqing FANG, Angela HUI, Gang XUE, Alexander NICKEL, Kashmir SAHOTA, Scott BELL, Chun CHEN, Wai LO
  • Publication number: 20110220981
    Abstract: Methods for fabricating an electronic device and electronic devices therefrom are provided. A method includes forming one or more masking layers on a semiconducting surface of a substrate and forming a plurality of dielectric isolation features and a plurality of fin-type projections using the masking layer. The method also includes processing the masking layers and the plurality of fin-type projections to provide an inverted T-shaped cross-section for the plurality of fin-type projections that includes a distal extension portion and a proximal base portion. The method further includes forming a plurality of bottom gate layers on the distal extension portion and forming a plurality of control gate layers on the plurality of dielectric isolation features and the plurality of bottom gate layers.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 15, 2011
    Applicant: Spansion LLC
    Inventors: Chun Chen, Shenqing Fang
  • Publication number: 20110221006
    Abstract: An electronic device includes a substrate having isolation features defining active regions coextending over a surface of the substrate. The device also includes coextending line patterns crossing over the active regions, including string and ground selection lines and word lines between the string and ground selection lines. The device further includes first implant regions of a first conductivity type in the active regions between the word lines and having a first carrier concentration. The device further includes second implant regions of the first conductivity type in the active regions between edge ones of the word lines and an adjacent one of the string selection line and the ground selection line. In the device, the second implant region includes a low doping portion abutting the edge word lines and a high doping portion spaced from the edge word line by the low doping portion and having a second carrier concentration greater than the first carrier concentration.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 15, 2011
    Applicant: Spansion LLC
    Inventors: Chun Chen, Shenqing Fang
  • Publication number: 20110199819
    Abstract: A method and apparatus for storing information is provided. A core region of memory includes a semiconductor layer, at least one shallow trench, an insulator, and a charge-trapping layer. The semiconductor layer includes at least one source/drain region, and the insulator disposed above the source/drain region. The charge trapping layer is within the insulator, and the charge trapping layer is above the entire width of the source/drain region, and extends at least one angstrom beyond the width of the source/drain region, so that a portion the charge trapping layer extends into at least one shallow trench.
    Type: Application
    Filed: February 16, 2010
    Publication date: August 18, 2011
    Applicant: SPANSION LLC
    Inventors: Shenqing Fang, Youseok Suh
  • Patent number: 7998846
    Abstract: A semiconductor fabrication system and method are presented. A three dimensional multilayer integrated circuit fabrication method can include forming a first device layer and forming a second device layer on top of the first device layer with minimal detrimental heat transfer to the first layer by utilizing a controlled laser layer formation annealing process. A controlled laser crystallization process can be utilized and the controlled laser can include creating an amorphous layer; defining a crystallization area in the amorphous layer, where in the crystallization area is defined to promote single crystal growth (i.e. prevent multi-crystalline growth); and applying laser to the crystallization area, wherein the laser is applied in a manner that prevents undesired heat transfer to another layer.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: August 16, 2011
    Assignee: Spansion LLC
    Inventors: Eunha Kim, Jeremy Wahl, Shenqing Fang, YouSeok Suh, Kuo-Tung Chang, Yi Ma, Rinji Sugino, Jean Yang
  • Patent number: 7951704
    Abstract: An integrated circuit memory device, in one embodiment, includes a substrate and first and second inter-level dielectric layers successively disposed on the substrate. One or more contacts in the peripheral extend through the first inter-level dielectric layer to respective components. One or more vias and a plurality of dummy vias extend through the second inter-level dielectric layer in the peripheral area. Each of the one or more peripheral vias extend to a respective peripheral contact. The peripheral dummy vias are located proximate the peripheral vias.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: May 31, 2011
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Wenmei Li
  • Patent number: 7943980
    Abstract: A method for fabricating a memory device with a self-aligned trap layer which is optimized for scaling is disclosed. In the present invention, a non-conformal oxide is deposited over the charge trapping layer to form a thick oxide on top of the core source/drain region and a pinch off and a void at the top of the STI trench. An etch is performed on the pinch-off oxide and the thin oxide on the trapping layer on the STI oxide. The trapping layer is then partially etched between the core cells. A dip-off of the oxide on the trapping layer is performed. And a top oxide is formed. The top oxide converts the remaining trap layer to oxide and thus isolate the trap layer.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: May 17, 2011
    Assignee: Spansion LLC
    Inventors: Shenqing Fang, Kuo-Tung Chang, Tim Thurgate, YouSeok Suh, Allison Holbrook