Patents by Inventor Siang Ping Kwok
Siang Ping Kwok 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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Patent number: 7531415Abstract: A three layer film (116/114/112), such as nitride/oxide/nitride for a CMP stop layer (110). A gap filling material (120) is polished, stopping on the first film (112). The first film (112) is then stripped using an etch chemistry that is selective against removing the second film (114). CMP is then continued stopping on the third film (116).Type: GrantFiled: September 23, 2004Date of Patent: May 12, 2009Assignee: Texas Instruments IncorporatedInventor: Siang Ping Kwok
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Patent number: 7005361Abstract: In one embodiment, an integrated circuit includes a thin film resistor, which includes a resistor material that has been deposited on a substrate surface within a channel defined by opposing first and second portions of a stencil structure formed on the substrate surface, the resistor material having an initial width determined by a width of the channel. The stencil structure has been adapted to receive a planarizing material that protects against reduction of the initial width of the resistor material during subsequent process steps for removing the stencil structure. A head mask overlays an end portion of the thin film resistor and a dielectric overlays the head mask, the dielectric defining a via formed in the dielectric above a portion of the head mask. A conductive material has been deposited in the via, coupled to the portion of the head mask and electrically connecting the thin film resistor to other components of the integrated circuit.Type: GrantFiled: June 24, 2004Date of Patent: February 28, 2006Assignee: Texas Instruments IncorporatedInventors: Siang Ping Kwok, Eric W. Beach, Philipp Steinmann
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Patent number: 6872655Abstract: A thin film resistor structure (75) is formed on a dielectric layer (60). A capping layer (90) is formed above said thin film resistor structure (75) and vias (110) are formed in the capping layer (90) using a two step etching process comprising of a dry etch process and a wet etch process. Conductive layers (120) are formed in the vias and form electrical contacts to the thin film resistor structure (75).Type: GrantFiled: February 4, 2003Date of Patent: March 29, 2005Assignee: Texas Instruments IncorporatedInventors: Pushpa Mahalingam, Robert Hung Nguyen, Philipp Steinmann, Eric W. Beach, Siang Ping Kwok
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Publication number: 20040227614Abstract: In one embodiment, an integrated circuit includes a thin film resistor, which includes a resistor material that has been deposited on a substrate surface within a channel defined by opposing first and second portions of a stencil structure formed on the substrate surface, the resistor material having an initial width determined by a width of the channel. The stencil structure has been adapted to receive a planarizing material that protects against reduction of the initial width of the resistor material during subsequent process steps for removing the stencil structure. A head mask overlays an end portion of the thin film resistor and a dielectric overlays the head mask, the dielectric defining a via formed in the dielectric above a portion of the head mask. A conductive material has been deposited in the via, coupled to the portion of the head mask and electrically connecting the thin film resistor to other components of the integrated circuit.Type: ApplicationFiled: June 24, 2004Publication date: November 18, 2004Inventors: Siang Ping Kwok, Eric W. Beach, Philipp Steinmann
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Patent number: 6805614Abstract: A three layer film (116/114/112), such as nitride/oxide/nitride for a CMP stop layer (110). A gap filling material (120) is polished, stopping on the first film (112). The first film (112) is then stripped using an etch chemistry that is selective against removing the second film (114). CMP is then continued stopping on the third film (116).Type: GrantFiled: November 30, 2001Date of Patent: October 19, 2004Assignee: Texas Instruments IncorporatedInventor: Siang Ping Kwok
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Publication number: 20040152299Abstract: A thin film resistor structure (75) is formed on a dielectric layer (60). A capping layer (90) is formed above said thin film resistor structure (75) and vias (110) are formed in the capping layer (90) using a two step etching process comprising of a dry etch process and a wet etch process. Conductive layers (120) are formed in the vias and form electrical contacts to the thin film resistor structure (75).Type: ApplicationFiled: February 4, 2003Publication date: August 5, 2004Inventors: Pushpa Mahalingam, Robert Hung Nguyen, Philipp Steinmann, Eric W. Beach, Siang Ping Kwok
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Publication number: 20040070048Abstract: In one embodiment, an integrated circuit includes a thin film resistor, which includes a resistor material that has been deposited on a substrate surface within a channel defined by opposing first and second portions of a stencil structure formed on the substrate surface, the resistor material having an initial width determined by a width of the channel. The stencil structure has been adapted to receive a planarizing material that protects against reduction of the initial width of the resistor material during subsequent process steps for removing the stencil structure. A head mask overlays an end portion of the thin film resistor and a dielectric overlays the head mask, the dielectric defining a via formed in the dielectric above a portion of the head mask. A conductive material has been deposited in the via, coupled to the portion of the head mask and electrically connecting the thin film resistor to other components of the integrated circuit.Type: ApplicationFiled: October 15, 2002Publication date: April 15, 2004Inventors: Siang Ping Kwok, Eric W. Beach, Philipp Steinmann
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Patent number: 6627938Abstract: In one aspect, the invention encompasses a method of forming a capacitor. A mass is formed over an electrical node. An opening is formed within the mass. The opening has a lower portion proximate the node and an upper portion above the lower portion. The lower portion is wider than the upper portion. A first conductive layer is formed within the opening and along a periphery of the opening. After the first conductive layer is formed, a portion of the mass is removed from beside the upper portion of the opening while another portion of the mass is left beside the lower portion of the opening. A dielectric material is formed over the first conductive layer, and a second conductive layer is formed over the dielectric material. The second conductive layer is separated from the first conductive layer by the dielectric material. In another aspect, the invention encompasses a capacitor construction.Type: GrantFiled: December 1, 2000Date of Patent: September 30, 2003Assignee: Micron Technology, Inc.Inventors: Siang Ping Kwok, William F. Richardson
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Patent number: 6429087Abstract: In one aspect, the invention encompasses a method of forming a capacitor. A mass is formed over an electrical node. An opening is formed within the mass. The opening has a lower portion proximate the node and an upper portion above the lower portion. The lower portion is wider than the upper portion. A first conductive layer is formed within the opening and along a periphery of the opening. After the first conductive layer is formed, a portion of the mass is removed from beside the upper portion of the opening while another portion of the mass is left beside the lower portion of the opening. A dielectric material is formed over the first conductive layer, and a second conductive layer is formed over the dielectric material. The second conductive layer is separated from the first conductive layer by the dielectric material. In another aspect, the invention encompasses a capacitor construction.Type: GrantFiled: August 30, 1999Date of Patent: August 6, 2002Assignee: Micron Technology, Inc.Inventors: Siang Ping Kwok, William F. Richardson
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Publication number: 20020086497Abstract: Shallow trench isolation is improved by adding sacrificial sidewalls to the nitride mask, which are subsequently removed to allow gap fill oxide material to overlap the edges of the active region, preventing CMP-induced trenching at the edges of the active area.Type: ApplicationFiled: December 6, 2001Publication date: July 4, 2002Inventor: Siang Ping Kwok
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Publication number: 20020065023Abstract: A three layer film (116/114/112), such as nitride/oxide/nitride for a CMP stop layer (110). A gap filling material (120) is polished, stopping on the first film (112). The first film (112) is then stripped using an etch chemistry that is selective against removing the second film (114). CMP is then continued stopping on the third film (116).Type: ApplicationFiled: November 30, 2001Publication date: May 30, 2002Inventor: Siang Ping Kwok
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Patent number: 6380008Abstract: The stress at the edges of a thin film conductor can be reduced by noncoincident layered structures, which takes advantage of the characteristic stress polarity changing from tensile to compressive or vice versa in the edge vicinity in order to avoid device reliability and performance problems. By using noncoincident layered structures, destructive stress interference from different layers can be achieved to reduce the stress or stress gradient at the edge. The structures and methods disclosed herein can advantageously be used in many integrated circuit and device manufacturing applications (including gates, wordlines, and bitlines).Type: GrantFiled: December 14, 2000Date of Patent: April 30, 2002Assignee: Texas Instruments IncorporatedInventors: Siang Ping Kwok, William F. Richardson, Dirk N. Anderson
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Patent number: 6373088Abstract: The stress at the edges of a thin film conductor can be reduced by noncoincident layered structures, which takes advantage of the characteristic stress polarity changing from tensile to compressive or vice versa in the edge vicinity in order to avoid device reliability and performance problems. By using noncoincident layered structures, destructive stress interference from different layers can be achieved to reduce the stress or stress gradient at the edge. The structures and methods disclosed herein can advantageously be used in many integrated circuit and device manufacturing applications (including gates, wordlines, and bitlines).Type: GrantFiled: June 10, 1998Date of Patent: April 16, 2002Assignee: Texas Instruments IncorporatedInventors: Siang Ping Kwok, William F. Richardson, Dirk N. Anderson
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Publication number: 20020019106Abstract: In one aspect, the invention encompasses a method of forming a capacitor. A mass is formed over an electrical node. An opening is formed within the mass. The opening has a lower portion proximate the node and an upper portion above the lower portion. The lower portion is wider than the upper portion. A first conductive layer is formed within the opening and along a periphery of the opening. After the first conductive layer is formed, a portion of the mass is removed from beside the upper portion of the opening while another portion of the mass is left beside the lower portion of the opening. A dielectric material is formed over the first conductive layer, and a second conductive layer is formed over the dielectric material. The second conductive layer is separated from the first conductive layer by the dielectric material. In another aspect, the invention encompasses a capacitor construction.Type: ApplicationFiled: August 30, 1999Publication date: February 14, 2002Inventors: SIANG PING KWOK, WILLIAM F. RICHARDSON
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Patent number: 6326672Abstract: In one aspect, the invention encompasses a LOCOS process. A pad oxide layer is provided over a silicon-comprising substrate. A silicon nitride layer is provided over the pad oxide layer and patterned with the pad oxide layer to form masking blocks. The patterning exposes portions of the silicon-comprising substrate between the masking blocks. The masking blocks comprise sidewalls. Polysilicon is formed along the sidewalls of the masking blocks. Subsequently, the silicon-comprising substrate and polysilicon are oxidized to form field oxide regions proximate the masking blocks. In another aspect, the invention encompasses a semiconductive material structure. Such structure includes a semiconductive material substrate and at least one composite block over the semiconductive material substrate. The composite block comprises a layer of silicon dioxide and a layer of silicon nitride over the layer of silicon dioxide. The silicon nitride and silicon dioxide have coextensive opposing sidewalls.Type: GrantFiled: April 27, 2000Date of Patent: December 4, 2001Assignee: Micron Technology, Inc.Inventor: Siang Ping Kwok
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Patent number: 6306726Abstract: In one aspect, the invention encompasses a LOCOS process. A pad oxide layer is provided over a silicon-comprising substrate. A silicon nitride layer is provided over the pad oxide layer and patterned with the pad oxide layer to form masking blocks. The patterning exposes portions of the silicon-comprising substrate between the masking blocks. The masking blocks comprise sidewalls. Polysilicon is formed along the sidewalls of the masking blocks. Subsequently, the silicon-comprising substrate and polysilicon are oxidized to form field oxide regions proximate the masking blocks. In another aspect, the invention encompasses a semiconductive material structure. Such structure includes a semiconductive material substrate and at least one composite block over the semiconductive material substrate. The composite block comprises a layer of silicon dioxide and a layer of silicon nitride over the layer of silicon dioxide. The silicon nitride and silicon dioxide have coextensive opposing sidewalls.Type: GrantFiled: August 30, 1999Date of Patent: October 23, 2001Assignee: Micron Technology, Inc.Inventor: Siang Ping Kwok
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Publication number: 20010026004Abstract: The stress at the edges of a thin film conductor can be reduced by noncoincident layered structures, which takes advantage of the characteristic stress polarity changing from tensile to compressive or vice versa in the edge vicinity in order to avoid device reliability and performance problems. By using noncoincident layered structures, destructive stress interference from different layers can be achieved to reduce the stress or stress gradient at the edge. The structures and methods disclosed herein can advantageously be used in many integrated circuit and device manufacturing applications (including gates, wordlines, and bitlines).Type: ApplicationFiled: June 10, 1998Publication date: October 4, 2001Inventors: SIANG PING KWOK, WILLIAM F. RICHARDSON, DIRK N. ANDERSON
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Publication number: 20010002053Abstract: In one aspect, the invention encompasses a method of forming a capacitor. A mass is formed over an electrical node. An opening is formed within the mass. The opening has a lower portion proximate the node and an upper portion above the lower portion. The lower portion is wider than the upper portion. A first conductive layer is formed within the opening and along a periphery of the opening. After the first conductive layer is formed, a portion of the mass is removed from beside the upper portion of the opening while another portion of the mass is left beside the lower portion of the opening. A dielectric material is formed over the first conductive layer, and a second conductive layer is formed over the dielectric material. The second conductive layer is separated from the first conductive layer by the dielectric material. In another aspect, the invention encompasses a capacitor construction.Type: ApplicationFiled: December 1, 2000Publication date: May 31, 2001Inventors: Siang Ping Kwok, William F. Richardson
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Patent number: 6211037Abstract: The invention includes a method of reducing stress during formation of field oxide by LOCOS. Field oxide is formed by oxidizing a silicon substrate, and fluorine is incorporated into the field oxide during the oxidizing. After the fluorine is incorporated into the field oxide, the field oxide is annealed at a temperature of at least about 1000° C.Type: GrantFiled: August 30, 1999Date of Patent: April 3, 2001Assignee: Micron Technology, Inc.Inventor: Siang Ping Kwok
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Patent number: 6033975Abstract: A semiconductor device (60) may comprise a semiconductor layer (12) having an outer surface (20). A plurality of gates (18) may be disposed over the outer surface (20) of the semiconductor layer (12). An isolation cover (30) may be disposed over the gates (18). An implant screen (40) may be grown on the outer surface (20) of the semiconductor layer (12) between the isolation covers (30) of the gates (18).Type: GrantFiled: December 17, 1997Date of Patent: March 7, 2000Assignee: Texas Instruments IncorporatedInventors: Siang Ping Kwok, William F. Richardson, Dirk Noel Anderson, Jiann Liu