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).
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Publication number: 20240145401Abstract: 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: ApplicationFiled: May 25, 2023Publication date: May 2, 2024Inventors: Chang-Ching Yu, Wei-Ti Hsu
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Publication number: 20130251928Abstract: 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: ApplicationFiled: May 10, 2013Publication date: September 26, 2013Applicant: INVISTA North America S.a.r.l.Inventor: Wei-Ching YU
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Publication number: 20120301227Abstract: 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: ApplicationFiled: October 11, 2011Publication date: November 29, 2012Applicant: DEHAN INTELLECTUAL TECHNOLOGY CO., LTDInventors: Wei-Ching Yu, Jen-Chieh Liang, Han-Tsung Huang, Hong-Gening Huang
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Publication number: 20120008251Abstract: 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: ApplicationFiled: July 12, 2010Publication date: January 12, 2012Inventors: Wei-Ching Yu, Jason Yu
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Publication number: 20100130085Abstract: 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: ApplicationFiled: November 25, 2008Publication date: May 27, 2010Applicant: Invista North America S.a r.l.Inventor: Wei-Ching Yu
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Publication number: 20090169782Abstract: 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: ApplicationFiled: November 22, 2004Publication date: July 2, 2009Applicant: Invista North America S AR LInventor: Wei-Ching Yu
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Patent number: 6878226Abstract: 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: GrantFiled: January 8, 2002Date of Patent: April 12, 2005Inventor: Wei-Ching Yu
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Publication number: 20030136500Abstract: 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: ApplicationFiled: January 8, 2002Publication date: July 24, 2003Inventor: Wei-Ching Yu
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Patent number: 6346350Abstract: 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: GrantFiled: April 20, 1999Date of Patent: February 12, 2002Assignee: Celgard Inc.Inventors: Ronald W. Call, Pierre C. Cook, Shawn E. Hux, Khuy Van Nguyen, Wei-Ching Yu
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Patent number: 6132654Abstract: 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: GrantFiled: November 16, 1999Date of Patent: October 17, 2000Assignee: Celgard Inc.Inventor: Wei-Ching Yu
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Patent number: 6057060Abstract: A battery separator is made from a microporous polyolefin membrane having a thickness of about 0.33 mills to about 0.5 mils.Type: GrantFiled: June 22, 1997Date of Patent: May 2, 2000Assignee: Celgard Inc.Inventor: Wei-Ching Yu
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Patent number: 5952120Abstract: 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: GrantFiled: April 15, 1997Date of Patent: September 14, 1999Assignee: Celgard LLCInventors: Wei-Ching Yu, Shawn E. Hux
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Patent number: 5691077Abstract: 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: GrantFiled: May 20, 1996Date of Patent: November 25, 1997Assignee: Hoechst Celanese CorporationInventor: Wei-Ching Yu
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Patent number: 5667911Abstract: 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: GrantFiled: December 22, 1994Date of Patent: September 16, 1997Assignee: Hoechst Celanese CorporationInventors: Wei-Ching Yu, Carlton F. Dwiggins
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Patent number: 5565281Abstract: 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: GrantFiled: December 2, 1994Date of Patent: October 15, 1996Assignee: Hoechst Celanese CorporationInventors: Wei-Ching Yu, Margaret W. Geiger