Patents by Inventor Wei-Ching Yu

Wei-Ching Yu 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: 20240145401
    Abstract: The present disclosure provides method to generate a dummy pad pattern. A method according to embodiment of the present disclosure includes receiving a design layout that includes a device region disposed in a scribe line region, identifying a center portion of the scribe line region surrounding the device region and an edge portion surrounding the center portion, dividing the edge portion into a plurality of rectangular areas, super-positioning a dummy pattern on each of the plurality of rectangular areas to obtain edge dummy patterns, super-positioning the dummy pattern on the center portion to obtain center dummy patterns, carving out a portion of the dummy pattern corresponding to the device region from the center dummy patterns to obtain net center dummy patterns, generating a scribe line dummy pattern based on the edge dummy patterns and the net center dummy patterns, and fabricating a first photomask including the scribe line dummy pattern.
    Type: Application
    Filed: May 25, 2023
    Publication date: May 2, 2024
    Inventors: Chang-Ching Yu, Wei-Ti Hsu
  • Publication number: 20130251928
    Abstract: This invention relates to a process for crystallizing and solid state polymerizing polymers, in the form of amorphous pellets by coating the pellets with a coating of 50 to 250 ppm of an anti-sticking agent to the amorphous pellets. The invention also relates to such a coated pellet. The coated pellet is then heated such that its surface is at least partially crystallized or essentially crystallized. Next it is solid state polymerize to a high molecular weight. The capacity of the crystallization and solid state polymerization process can be increased by using higher temperatures when the anti-sticking agent is present as compared to a normal process using the same polymer. The preferred anti-sticking agents are chosen to give high clarity to articles made from the high molecular weight pellet. The preferred anti-sticking agent is fumed silica, but other organic and inorganic coatings may be used.
    Type: Application
    Filed: May 10, 2013
    Publication date: September 26, 2013
    Applicant: INVISTA North America S.a.r.l.
    Inventor: Wei-Ching YU
  • Publication number: 20120301227
    Abstract: A foundation pile includes a tubular wall, a top cap covering a top end of the tubular wall, a partition plate disposed transversely in the tubular wall below the top cap and dividing an inner space of the tubular wall into upper and lower spaces, two opposite fixing holes extending radially through the tubular wall and communicated with the upper space, and a plurality of pressure release holes extending radially through the tubular wall and communicated with the lower space. The partition plate prevents concrete slurry from flowing into the upper space. The pressure release holes allow the concrete to consolidate therein and to thereby increase transverse binding forces with the foundation pile. A method of installing the foundation pile is also disclosed.
    Type: Application
    Filed: October 11, 2011
    Publication date: November 29, 2012
    Applicant: DEHAN INTELLECTUAL TECHNOLOGY CO., LTD
    Inventors: Wei-Ching Yu, Jen-Chieh Liang, Han-Tsung Huang, Hong-Gening Huang
  • Publication number: 20120008251
    Abstract: A film capacitor comprising (1) of electric conduction electrodes and (2) of semi-crystalline polymeric dielectric film(s), the thickness of which ranges from 1 micron to 80 micron, made by a melt-stretching extrusion process through a die (circular die or flat die) with a drawdown ratio of 30 or higher (the ratio of die gap to the film thickness) at die temperatures higher than the melting point of said semi-crystalline polymer(s). The semi-crystalline polymeric dielectric films made by such melt-stretching extrusion process show a significantly low shrinkage at high temperatures until they are melted. The capacitor comprising such low shrinkage film dielectrics can be used at a much higher temperature than comprising conventional biaxially oriented film dielectrics made of the same plastic materials.
    Type: Application
    Filed: July 12, 2010
    Publication date: January 12, 2012
    Inventors: Wei-Ching Yu, Jason Yu
  • Publication number: 20100130085
    Abstract: Briefly described, embodiments of this disclosure, among others, include moisture-vapor-breathable and liquid-impermissible structures (e.g., pads, cushions, padding, and the like, for the seat, arms, back, etc. of upholstery furniture), and/or upholstery structures (e.g., upholstery furniture) that include moisture-vapor-breathable and liquid-impermissible structure, methods of making moisture-vapor-breathable and liquid-impermissible structures.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 27, 2010
    Applicant: Invista North America S.a r.l.
    Inventor: Wei-Ching Yu
  • Publication number: 20090169782
    Abstract: This invention relates to a process for crystallizing and solid state polymerizing polymers, in the form of amorphous pellets by coating the pellets with a coating of 50 to 250 ppm of an anti-sticking agent to the amorphous pellets. The invention also relates to such a coated pellet. The coated pellet is then heated such that its surface is at least partially crystallized or essentially crystallized. Next it is solid state polymerize to a high molecular weight. The capacity of the crystallization and solid state polymerization process can be increased by using higher temperatures when the anti-sticking agent is present as compared to a normal process using the same polymer. The preferred anti-sticking agents are chosen to give high clarity to articles made from the high molecular weight pellet. The preferred anti-slicking agent is fumed silica, but other organic and inorganic coatings may be used.
    Type: Application
    Filed: November 22, 2004
    Publication date: July 2, 2009
    Applicant: Invista North America S AR L
    Inventor: Wei-Ching Yu
  • Patent number: 6878226
    Abstract: A continuous method of making dry-stretch microporous membrane battery separators from polypropylene (PP) or polyethylene (PE) or both benefits to the manufacturers in the production efficiency. The precursor-film extrusion in this invention is accomplished by multiple small film-extrusion lines at a compatible line speed with the followed oven processes (annealing and stretching). The overall production process starts continuously from film extrusion to annealing and to stretching. The benefits of the inventive continuous process includes a higher product yield, more effective oven-time usage, no need to handle and manage the intermediate products, less need in labor and machine maintenance, and potentially more stable product quality. The dry-stretch membrane separators made with this inventive continuous method include (1) single-ply PP or PE separators having a thickness ranging from 0.2 mil to 2.0 mil; (2) PP/PE/PP trilayer microporous membrane separators having a thickness ranging from 0.6 mil to 4.
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: April 12, 2005
    Inventor: Wei-Ching Yu
  • Publication number: 20030136500
    Abstract: A continuous method of making dry-stretch microporous membrane battery separators from polypropylene (PP) or polyethylene (PE) or both benefits to the manufacturers in the production efficiency. The precursor-film extrusion in this invention is accomplished by multiple small film-extrusion lines at a compatible line speed with the followed oven processes (annealing and stretching). The overall production process starts continuously from film extrusion to annealing and to stretching. The benefits of the inventive continuous process includes a higher product yield, more effective oven-time usage, no need to handle and manage the intermediate products, less need in labor and machine maintenance, and potentially more stable product quality.
    Type: Application
    Filed: January 8, 2002
    Publication date: July 24, 2003
    Inventor: Wei-Ching Yu
  • Patent number: 6346350
    Abstract: A fusible, structurally stabilized battery separator is disclosed. The separator is formed by extruding a cylindrical parison of a polymer film and quenching the film on both sides with a low temperature fluid stream prior to processing the film to impart microporosity. Most preferably, the film includes at least a polyethylene layer and polypropylene layer.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: February 12, 2002
    Assignee: Celgard Inc.
    Inventors: Ronald W. Call, Pierre C. Cook, Shawn E. Hux, Khuy Van Nguyen, Wei-Ching Yu
  • Patent number: 6132654
    Abstract: A battery separator is made from a microporous polyolefin membrane having a thickness of less than or equal to 0.5 mil. The separator is made by extruding a parison, collapsing the parison to form a flat sheet comprising two plies, annealing the sheet, stretching the sheet, and winding the sheet.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: October 17, 2000
    Assignee: Celgard Inc.
    Inventor: Wei-Ching Yu
  • Patent number: 6057060
    Abstract: A battery separator is made from a microporous polyolefin membrane having a thickness of about 0.33 mills to about 0.5 mils.
    Type: Grant
    Filed: June 22, 1997
    Date of Patent: May 2, 2000
    Assignee: Celgard Inc.
    Inventor: Wei-Ching Yu
  • Patent number: 5952120
    Abstract: A method of making a trilayer, shutdown battery separator has the following steps: extruding a polyethylene precursor; extruding a polypropylene precursor; forming a trilayer precursor, the trilayer precursor having the polyethylene precursor sandwiched between two polypropylene precursors; bonding the trilayer precursor; annealing the trilayer precursor; stretching the trilayer precursor; and forming thereby the battery separator.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: September 14, 1999
    Assignee: Celgard LLC
    Inventors: Wei-Ching Yu, Shawn E. Hux
  • Patent number: 5691077
    Abstract: The present invention is directed to a shutdown, trilayer battery separator. The separator has a first and a third microporous membranes sandwiching a second microporous membrane. The first and the third membranes have a greater puncture strength than the second membrane. The second membrane has a lower melting temperature than either the first or the third membranes.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: November 25, 1997
    Assignee: Hoechst Celanese Corporation
    Inventor: Wei-Ching Yu
  • Patent number: 5667911
    Abstract: Continuous seamless cross-plied battery separators are formed by bringing at least two anisotropic with respect to mechanical strength (e.g. uniaxially oriented), microporous plies into adhering face contact such that the uniaxial orientation of one microporous ply is angularly biased relative to the other microporous ply (e.g., between 20.degree. to 90.degree.). This biased relationship between the microporous plies is most preferably achieved by spirally or helically slitting a tubular microporous membrane. The plies are adhered to one another with adhesive and/or by means of heat and pressure. The cross-plied battery separators of this invention exhibit increased puncture strength without significant decrease in permeability.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: September 16, 1997
    Assignee: Hoechst Celanese Corporation
    Inventors: Wei-Ching Yu, Carlton F. Dwiggins
  • Patent number: 5565281
    Abstract: The present invention is directed to a shutdown, bilayer battery separator and a process for making the same. A first microporous membrane with shutdown capability and a second microporous membrane with strength capability are joined together in face-to-face contact. The face of the first membrane being adhered by calendaring, adhesives, or welding, to the face of the second membrane, and the separator having a thickness of less than 3 mils, and a puncture strength, as measured from the second microporous membrane, of greater than 1900 g-mm, and a peel strength of greater than 1 grams/centimeter.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: October 15, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Wei-Ching Yu, Margaret W. Geiger