Patents by Inventor Yun-feng Chang

Yun-feng Chang 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: 20220302298
    Abstract: A semiconductor device and method of manufacture are provided which help to support contacts while material is removed to form air gaps. In embodiments a contact is formed with an enlarged base to help support overlying portions of the contact. In other embodiments a scaffold material may also be placed prior to the formation of the air gaps in order to provide additional support.
    Type: Application
    Filed: June 6, 2022
    Publication date: September 22, 2022
    Inventors: Ching-Feng Fu, Guan-Ren Wang, Yun-Min Chang, Yu-Lien Huang
  • Patent number: 11380794
    Abstract: A method of forming a semiconductor device includes: forming a gate structure over a fin that protrudes above a substrate; forming source/drain regions over the fin on opposing sides of the gate structure; forming a first dielectric layer and a second dielectric layer successively over the source/drain regions; performing a first etching process to form an opening in the first dielectric layer and in the second dielectric layer, where the opening exposes an underlying electrically conductive feature; after performing the first etching process, performing a second etching process to enlarge a lower portion of the opening proximate to the substrate; and forming a contact plug in the opening after the second etching process.
    Type: Grant
    Filed: May 8, 2020
    Date of Patent: July 5, 2022
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Yu-Lien Huang, Guan-Ren Wang, Ching-Feng Fu, Yun-Min Chang
  • Patent number: 8524967
    Abstract: A process for producing a monoalkylated aromatic compound in an alkylation reaction zone, said process comprising the steps of: (a) providing a first catalytic particulate material which comprises MCM-56 and having a ratio of surface area over volume ratio greater than about 79 cm?1, (b) providing said alkylation reaction zone with an alkylatable aromatic compound, an alkylating agent, and said first catalytic particulate material; and (c) contacting said alkylatable aromatic compound and said alkylating agent with said catalytic particulate material in said alkylation reaction zone maintained under alkylation conditions, to form a product comprised of said monoalkylated aromatic compound and polyalkylated aromatic compound(s).
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: September 3, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Michael C. Clark, Frederick Y. Lo, Christine N. Elia, Yun-Feng Chang
  • Publication number: 20130098804
    Abstract: A catalyst composition that has superior attrition performance and a method that produces said catalyst composition to be used for fluid catalytic cracking processes to convert a heavy hydrocarbon fraction into mainly liquid fuels, particularly gasoline and light olefins. The catalyst composition has a moisture level or loss on ignition below 12 wt % and attrition rate below 3 wt. %/hr.
    Type: Application
    Filed: October 24, 2011
    Publication date: April 25, 2013
    Inventors: Yun-feng Chang, Lian Du
  • Publication number: 20130072734
    Abstract: A process for producing a monoalkylated aromatic compound in an alkylation reaction zone, said process comprising the steps of: (a) providing a first catalytic particulate material which comprises MCM-56 and having a ratio of surface area over surface volume ratio greater than about 79 cm?1; (b) providing said alkylation reaction zone with an alkylatable aromatic compound, an alkylating agent, and said first catalytic particulate material; and (c) contacting said alkylatable aromatic compound and said alkylating agent with said catalytic particulate material in said alkylation reaction zone maintained under alkylation conditions, to form a product comprised of said monoalkylated aromatic compound and polyalkylated aromatic compound(s).
    Type: Application
    Filed: November 14, 2012
    Publication date: March 21, 2013
    Applicant: ExxonMobil Chemical Patents Inc.
    Inventors: Michael C. Clark, Frederick Y. Lo, Christine N. Elia, Yun-Feng Chang
  • Patent number: 8357830
    Abstract: A process for producing a monoalkylated aromatic compound in an alkylation reaction zone, comprising providing upstream of said alkylation reaction zone a reactive guard bed having a catalyst of *BEA, MWW, or FAU framework structure and an alkylation feed wherein at least a portion of any reactive impurities are removed from the alkylation feed to form an effluent; and providing the effluent and a first catalytic particulate material which comprises MCM-56 and an alumina binder sized 50-60 mesh and having a ratio of surface area over volume ratio in the range of 241 to 2867 cm-1 and optionally additional alkylating agent to said alkylation reaction zone; and contacting said alkylatable aromatic compound and said alkylating agent with said catalytic particulate material in said alkylation reaction zone maintained under alkylation conditions, to form a product comprised of said monoalkylated aromatic compound.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: January 22, 2013
    Assignee: Exxonmobil Chemical Patents Inc.
    Inventors: Michael C. Clark, Christine N. Elia, Frederick Y. Lo, Yun-Feng Chang
  • Publication number: 20120283497
    Abstract: A process for producing a monoalkylated aromatic compound in an alkylation reaction zone, said process comprising the steps of: (a) providing a first catalytic particulate material which comprises MCM-56 and having a ratio of surface area over surface volume ratio greater than about 79 cm?1; (b) providing said alkylation reaction zone with an alkylatable aromatic compound, an alkylating agent, and said first catalytic particulate material; and (c) contacting said alkylatable aromatic compound and said alkylating agent with said catalytic particulate material in said alkylation reaction zone maintained under alkylation conditions, to form a product comprised of said monoalkylated aromatic compound and polyalkylated aromatic compound(s).
    Type: Application
    Filed: June 29, 2012
    Publication date: November 8, 2012
    Inventors: Michael C. Clark, Christine N. Elia, Frederick Y. Lo, Yun-Feng Chang
  • Patent number: 8247629
    Abstract: A process for producing a monoalkylated aromatic compound in an alkylation reaction zone, said process comprising the steps of: (a) providing a first catalytic particulate material having a ratio of surface area over volume ratio greater than about 79 cm?1, (b) providing said alkylation reaction zone with an alkylatable aromatic compound, an alkylating agent, and said first catalytic particulate material; and (c) contacting said alkylatable aromatic compound and said alkylating agent with said catalytic particulate material in said alkylation reaction zone maintained under alkylation conditions, to form a product comprised of said monoalkylated aromatic compound and polyalkylated aromatic compound(s).
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: August 21, 2012
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Michael C. Clark, Christine N. Elia, Frederick Y. Lo, Yun-Feng Chang
  • Publication number: 20110135796
    Abstract: An adsorbent composition prepared based on high solids formulation containing a clay, a binder precursor, optionally an adsorbent additive, a slurring agent and a process for preparing a shaped microspherical adsorbent product to be used in animal feed for reducing feed contamination and preventing bacteria growth and feed spoilage.
    Type: Application
    Filed: December 3, 2009
    Publication date: June 9, 2011
    Inventor: Yun-Feng Chang
  • Patent number: 7947621
    Abstract: This invention provides a process for manufacturing a catalyst with a desired attrition index, comprising the steps of selecting at least one molecular sieve having a morphology and size index (MSI) of from 1 to about 1000 to secure said desired attrition index of said catalyst.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: May 24, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yun-feng Chang, Machteld Maria Mertens, Stephen N. Vaughn
  • Publication number: 20110108462
    Abstract: A catalyst composition prepared based on high solids formulation containing a zeolite, a binder precursor, a matrix and a slurring agent and a process for preparing a shaped catalyst product to be used in fluid catalytic cracking process for converting a heavier hydrocarbon fraction into a lighter hydrocarbons, particularly gasoline and light olefins.
    Type: Application
    Filed: November 10, 2009
    Publication date: May 12, 2011
    Inventor: Yun-Feng Chang
  • Patent number: 7914760
    Abstract: A silicoaluminophosphate molecular sieve is disclosed that comprises first and second intergrown phases of a CHA framework type and an AEI framework type, wherein said first intergrown phase has an AEI/CHA ratio of from about 5/95 to about 40/60 as determined by DIFFaX analysis, the second intergrown phase has an AEI/CHA ratio of about 30/70 to about as determined by DIFFaX analysis and said molecular sieve has a silica to alumina molar ratio (Si/Al2) from about 0.13 to about 0.24.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: March 29, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Machteld M. Mertens, An Verberckmoes, Marcel J. Janssen, Yun Feng Chang, Luc R. M. Martens, Stephen Neil Vaughn, Kenneth Ray Clem, Wilfried J. Mortier
  • Publication number: 20110044761
    Abstract: Composition and process of surface modification of soil particles by coating to improve fertility, better moisture and nutrients retention, flooding resistance, and longer freeze-thaw-freeze cycle life.
    Type: Application
    Filed: August 22, 2009
    Publication date: February 24, 2011
    Inventor: Yun-Feng Chang
  • Publication number: 20100305385
    Abstract: Composition and process of encapsulation of sediment particles to reduce active pollutant components through surface charge modification.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Inventor: Yun-Feng Chang
  • Publication number: 20100301262
    Abstract: Composition and processes to prepare a polishing medium to be used in chemical and mechanical polishing applications.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Inventor: Yun-Feng Chang
  • Publication number: 20100303551
    Abstract: A process of decontamination of sediment particles to reduce active pollutant components through particle size reduction and stabilization treatment.
    Type: Application
    Filed: May 28, 2009
    Publication date: December 2, 2010
    Inventor: YUN-FENG CHANG
  • Publication number: 20100301146
    Abstract: Composition and use of milling medium to prepare a polishing medium to be used in chemical and mechanical polishing applications.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Inventor: Yun-Feng Chang
  • Patent number: 7816575
    Abstract: This invention provides a process for limiting the loss of catalyst particles through olefin product streams and regenerator flue gas streams exiting the reaction system. In particular, this invention provides for removing catalyst particles from the reactor using a water stream and from the regenerator using a two step separation process. The two step process involves the use of a catalyst fine separation unit.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: October 19, 2010
    Assignee: ExxonMobil Chemical Patents, Inc.
    Inventors: James H. Beech, Jr., Yun-feng Chang, Michael P. Nicoletti
  • Patent number: 7772337
    Abstract: This invention provides a method of making a molecular sieve catalyst composition comprising the steps of: a) combining molecular sieve crystals with binder and liquid to form a binder-sieve mixture; b) combining the binder-sieve mixture with matrix material to form a binder-sieve-matrix mixture; c) mixing the binder-sieve-matrix mixture under conditions sufficient to form a slurry having a solids content of at least 40 wt %, based on total weight of the slurry; d) progressing the mixing until slurry viscosity decreases without significant additional dilution of the slurry, so that the slurry solids content does not significantly decrease; and e) drying the decreased viscosity slurry to produce a dried molecular sieve catalyst composition having an attrition rate index of not greater than 1 wt %/hr. The aforementioned catalyst compositions can be used in processes for making olefin product from oxygenate feedstock, which olefin products can be further used for making (co)polymer products.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: August 10, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yun-feng Chang, Stephen N. Vaughn
  • Patent number: 7767871
    Abstract: A method for recovering molecular sieve crystals from a synthesis mixture that comprises adding at least one flocculant having a certain molecular weight and a certain charge density that contribute to the acceleration of the settling rate of the molecular sieve crystals and compositions made from the method.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: August 3, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yun-feng Chang, Daria N. Lissy