Patents by Inventor Manju Sarkar
Manju Sarkar 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: 20140005688Abstract: Hair removing device (200) comprising a base member (301) having two elongate arms (302) extending outwardly while maintaining a spacing (310) in between. Two elongate flexible elements (311) form a twined section (304) between their first and second ends (303), (305) that are secured to the two arms (302). The twined section (304) is positioned in the spacing (310), under a tension. A movable member (306) extends outwardly from the base member (301) and is movable relative to the base member (301) in forward and reverse strokes. The movable member (306) urges the twined section (304) to move forward during the forward stroke and releases the twined section (304) to resiliently retract during the reverse stroke. The twined section (304) can engage and uproot hair (314) during the forward stroke.Type: ApplicationFiled: March 25, 2011Publication date: January 2, 2014Inventor: Manju Sarkar
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Patent number: 8450832Abstract: Large tuning range junction varactor includes first and second junction capacitors coupled in parallel between first and second varactor terminals. First and second plates of the capacitors are formed by three alternating doped regions in a substrate. The first and third doped regions are of the same type sandwiching the second doped region of the second type. A first input terminal is coupled to the first and third doped regions and a second terminal is coupled to the second doped region. At the interfaces of the doped regions are first and second depletion regions whose width can be varied by varying the voltage across the terminals from zero to full reverse bias.Type: GrantFiled: April 5, 2007Date of Patent: May 28, 2013Assignee: GLOBALFOUNDRIES Singapore Pte. Ltd.Inventors: Manju Sarkar, Purakh Raj Verma
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Patent number: 7994563Abstract: A device is presented. The device includes a substrate with a first well of a first polarity type. The first well defines a varactor region and comprises a lower first well boundary located above a bottom surface of the substrate. A second well in the varactor region is also included in the device. The second well comprises a buried well of a second polarity type having an upper second well boundary disposed below an upper portion of the first well from an upper first well boundary to the upper second well boundary and a lower second well boundary disposed above the lower first well boundary, wherein an interface of the second well and the upper portion of the first well forms a shallow PN junction in the varactor region. The device also includes a gate structure in the varactor region. The upper portion of the first well beneath the gate structure forms a channel region of the device.Type: GrantFiled: November 11, 2009Date of Patent: August 9, 2011Assignee: Global Foudries Singapore PTE. Ltd.Inventors: Manju Sarkar, Purakh Raj Verma
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Patent number: 7952131Abstract: Large tuning range junction varactor includes first and second junction capacitors coupled in parallel between first and second varactor terminals. First and second plates of the capacitors are formed by three alternating doped regions in a substrate. The second and third doped regions are of the same type sandwiching the first doped region of the second type. A first varactor terminal is coupled to the second and third doped regions and a second varactor terminal is coupled to the first doped region. At the interfaces of the doped regions are first and second depletion regions, the widths of which can be varied by varying the voltage across the terminals from zero to full reverse bias. At zero bias condition, junction capacitance (Cmax) is enhanced due to summation of two junction capacitances in parallel. At reverse bias condition, with the merging of the two junction depletion widths, the capacitor areas are drastically reduced, thereby reducing Cmin significantly.Type: GrantFiled: June 21, 2010Date of Patent: May 31, 2011Assignee: Chartered Semiconductor Manufacturing, Ltd.Inventor: Manju Sarkar
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Publication number: 20100258910Abstract: Large tuning range junction varactor includes first and second junction capacitors coupled in parallel between first and second varactor terminals. First and second plates of the capacitors are formed by three alternating doped regions in a substrate. The second and third doped regions are of the same type sandwiching the first doped region of the second type. A first varactor terminal is coupled to the second and third doped regions and a second varactor terminal is coupled to the first doped region. At the interfaces of the doped regions are first and second depletion regions, the widths of which can be varied by varying the voltage across the terminals from zero to full reverse bias. At zero bias condition, junction capacitance (Cmax) is enhanced due to summation of two junction capacitances in parallel. At reverse bias condition, with the merging of the two junction depletion widths, the capacitor areas are drastically reduced, thereby reducing Cmin significantly.Type: ApplicationFiled: June 21, 2010Publication date: October 14, 2010Applicant: GLOBALFOUNDRIES SINGAPORE PTE. LTD.Inventor: Manju Sarkar
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Patent number: 7741187Abstract: Large tuning range junction varactor includes first and second junction capacitors coupled in parallel between first and second varactor terminals. First and second plates of the capacitors are formed by three alternating doped regions in a substrate. The second and third doped regions are of the same type sandwiching the first doped region of the second type. A first varactor terminal is coupled to the second and third doped regions and a second varactor terminal is coupled to the first doped region. At the interfaces of the doped regions are first and second depletion regions, the widths of which can be varied by varying the voltage across the terminals from zero to full reverse bias. At zero bias condition, junction capacitance (Cmax) is enhanced due to summation of two junction capacitances in parallel. At reverse bias condition, with the merging of the two junction depletion widths, the capacitor areas are drastically reduced, thereby reducing Cmin significantly.Type: GrantFiled: September 20, 2007Date of Patent: June 22, 2010Assignee: Chartered Semiconductor Manufacturing, Ltd.Inventor: Manju Sarkar
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Publication number: 20100117133Abstract: A device is presented. The device includes a substrate with a first well of a first polarity type. The first well defines a varactor region and comprises a lower first well boundary located above a bottom surface of the substrate. A second well in the varactor region is also included in the device. The second well comprises a buried well of a second polarity type having an upper second well boundary disposed below an upper portion of the first well from an upper first well boundary to the upper second well boundary and a lower second well boundary disposed above the lower first well boundary, wherein an interface of the second well and the upper portion of the first well forms a shallow PN junction in the varactor region. The device also includes a gate structure in the varactor region. The upper portion of the first well beneath the gate structure forms a channel region of the device.Type: ApplicationFiled: November 11, 2009Publication date: May 13, 2010Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING, LTD.Inventors: Manju SARKAR, Purakh Raj VERMA
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Patent number: 7618873Abstract: A MOS varactor includes a shallow PN junction beneath the surface of the substrate of a MOS structure. In depletion mode, the depletion region of the MOS structure merges with the depletion region of the shallow PN junction. This increases the total width of the depletion region of the MOS varactor to reduce Cmin.Type: GrantFiled: April 5, 2007Date of Patent: November 17, 2009Assignee: Chartered Semiconductor Manufacturing, Ltd.Inventors: Manju Sarkar, Purakh Raj Verma
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Publication number: 20090079033Abstract: Large tuning range junction varactor includes first and second junction capacitors coupled in parallel between first and second varactor terminals. First and second plates of the capacitors are formed by three alternating doped regions in a substrate. The second and third doped regions are of the same type sandwiching the first doped region of the second type. A first varactor terminal is coupled to the second and third doped regions and a second varactor terminal is coupled to the first doped region. At the interfaces of the doped regions are first and second depletion regions, the widths of which can be varied by varying the voltage across the terminals from zero to full reverse bias. At zero bias condition, junction capacitance (Cmax) is enhanced due to summation of two junction capacitances in parallel. At reverse bias condition, with the merging of the two junction depletion widths, the capacitor areas are drastically reduced, thereby reducing Cmin significantly.Type: ApplicationFiled: September 20, 2007Publication date: March 26, 2009Applicant: CHARTERED SEMICONDUCTOR MANUFACTURING, LTD.Inventor: Manju SARKAR
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Publication number: 20080246119Abstract: Large tuning range junction varactor includes first and second junction capacitors coupled in parallel between first and second varactor terminals. First and second plates of the capacitors are formed by three alternating doped regions in a substrate. The first and third doped regions are of the same type sandwiching the second doped region of the second type. A first input terminal is coupled to the first and third doped regions and a second terminal is coupled to the second doped region. At the interfaces of the doped regions are first and second depletion regions whose width can be varied by varying the voltage across the terminals from zero to full reverse bias.Type: ApplicationFiled: April 5, 2007Publication date: October 9, 2008Applicant: Chartered Semiconductor Manufacturing, Ltd.Inventors: Manju SARKAR, Purakh Raj Verma
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Publication number: 20080246071Abstract: A MOS varactor includes a shallow PN junction beneath the surface of the substrate of a MOS structure. In depletion mode, the depletion region of the MOS structure merges with the depletion region of the shallow PN junction. This increases the total width of the depletion region of the MOS varactor to reduce Cmin.Type: ApplicationFiled: April 5, 2007Publication date: October 9, 2008Applicant: Chartered Semiconductor Manufacturing, Ltd.Inventors: Manju Sarkar, Purakh Raj Verma
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Patent number: 6372652Abstract: A method for forming a thin film, electrically blowable fuse with reproducible blowing wattage using a sacrificial metal patch over a fuse dielectric layer and two etch processes; wherein the first etch process is selective to the metal patch and the second etch process is selective to the fuse dielectric layer. A fuse element, having an element width, is formed over a semiconductor structure, and a fuse dielectric layer is formed over the fuse element. A sacrificial metal patch is formed on the fuse dielectric layer; wherein the patch width being greater than the fuse element width. A second dielectric layer is formed on the sacrificial metal patch, and additional metal layers and dielectric layers may be formed over the second dielectric layer, but only the dielectric layers will remain over the fuse element.Type: GrantFiled: January 31, 2000Date of Patent: April 16, 2002Assignee: Chartered Semiconductor Manufacturing Ltd.Inventors: Purakh Raj Verma, Zia Alan Shafi, Yu Shan, Zeng Zheng, Manju Sarkar, Shao-Fu Sanford Chu