公开(公告)号：US11515057B2

公开(公告)日：2022-11-29

申请号：US17062788

申请日：2020-10-05

Applicant: Purdue Research Foundation

Inventor： Muhammad Ashraful Alam ,  Ruiyi Chen ,  Suprem R. Das ,  David B. Janes ,  Changwook Jeong ,  Mark Lundstrom

IPC: H01B1/02 ,  H01B1/04 ,  H01L31/0224 ,  B82Y40/00 ,  G02F1/1343 ,  H01L31/18 ,  H01L51/44 ,  B82Y10/00 ,  H01L29/41 ,  H01L29/16 ,  H01L31/028

Abstract: Hybrid transparent conducting materials are disclosed which combine a polycrystalline film and conductive nanostructures, in which the polycrystalline film is “percolation doped” with the conductive nanostructures. The polycrystalline film preferably is a single atomic layer thickness of polycrystalline graphene, and the conductive nanostructures preferably are silver nanowires.

公开(公告)号：US20170081696A1

公开(公告)日：2017-03-23

申请号：US15269972

申请日：2016-09-19

Applicant: Purdue Research Foundation

Inventor： SeyedehAida Ebrahimi ,  Muhammad Ashraful Alam

IPC: C12Q1/04 ,  G01N15/06 ,  G01N27/12

CPC classification number: C12Q1/04 ,  G01N15/0656 ,  G01N27/12

Abstract: A method and apparatus for electrically monitoring a time-varying liquid droplet whose conductivity is continuously modulated by osmoregulation response of cells. According to the method, the droplet impedance or conductance is monitored over time as the droplet shrinks due to evaporation. The monitoring data is then compared to calibration data which is obtained by monitoring a reference droplet. The result of the comparison is then used to determine the concentration of viable (live) biological material contained in the droplet.

公开(公告)号：US20180012972A1

公开(公告)日：2018-01-11

申请号：US15695440

申请日：2017-09-05

Applicant: Purdue Research Foundation

Inventor： Muhammad Ashraful Alam ,  Muhammad Masuduzzaman ,  Ankit Jain

IPC: H01L29/51 ,  H01G7/06 ,  H01G4/38 ,  H01G5/40 ,  H01L27/08 ,  B81B7/02 ,  H01L29/78 ,  H01G5/16 ,  H01L49/02

CPC classification number: H01L29/515 ,  B81B7/02 ,  B81B2201/014 ,  B81B2201/016 ,  B81B2201/07 ,  H01G4/38 ,  H01G5/16 ,  H01G5/40 ,  H01G7/06 ,  H01L27/0805 ,  H01L27/11502 ,  H01L27/11585 ,  H01L29/516 ,  H01L29/7842

Abstract: An electrical circuit comprising at least two negative capacitance insulators connected in series, one of the two negative capacitance insulators is biased to generate a negative capacitance. One of the negative capacitance insulators may include an air-gap which is part of a nanoelectromechnical system (NEMS) device and the second negative capacitance insulator includes a ferroelectric material. Both of the negative capacitance insulators may be located between the channel and gate of a field effect transistor. The NEMS device may include a movable electrode, a dielectric and a fixed electrode and arranged so that the movable electrode is attached to at least two points and spaced apart from the dielectric and fixed electrode, and the ferroelectric capacitor is electrically connected to either of the electrodes.

公开(公告)号：US20150124514A1

公开(公告)日：2015-05-07

申请号：US14533897

申请日：2014-11-05

Applicant: PURDUE RESEARCH FOUNDATION

Inventor： Muhammad Ashraful Alam ,  Muhammad Masuduzzaman

IPC: G11C11/22

CPC classification number: G11C11/225 ,  G11C7/04

Abstract: A method and apparatus for increasing the lifetime of ferroelectric devices is presented. The method includes applying a waveform to the input pulse to increase the rise or fall time of the pulse. The waveform may comprise a ramp, a step, or combinations of both. The waveform may be symmetrical with respect to the rising and falling edges of the pulses. A temperature control device may also be operatively connected to increase the temperature of the device to increase lifetime. In other embodiments, a resistance may be operatively connected in series with the ferroelectric device to increase lifetime.

Abstract translation: 介绍了一种提高铁电元件寿命的方法和装置。 该方法包括将波形应用于输入脉冲以增加脉冲的上升或下降时间。 波形可以包括斜坡，台阶或两者的组合。 波形可以相对于脉冲的上升沿和下降沿对称。 温度控制装置也可以可操作地连接以增加装置的温度以增加寿命。 在其他实施例中，电阻可以与铁电体器件串联可操作地连接以增加寿命。

公开(公告)号：US20220219473A1

公开(公告)日：2022-07-14

申请号：US17573385

申请日：2022-01-11

Applicant: Purdue Research Foundation

Inventor： Jan P. Allebach ,  Muhammad Ashraful Alam ,  Rahim Rahimi ,  Babak Ziaie ,  Ali Shakouri ,  Mukerrem Cakmak ,  Nicholas Glassmaker ,  Xihui Wang ,  Qinyu Yang

IPC: B41M3/00

Abstract: Methods for fabricating printed devices and monitoring one or more performance characteristics of the printed devices during their fabrication in a high-speed process. Such a method includes developing a physics-based model of at least a first component of the printed devices, fabricating the printed devices with the high-speed process using fabrication steps that comprise depositing the first components, acquiring a physical characteristic of a plurality of the first components of a plurality of the printed devices following the depositing of the first components, predicting a performance characteristic of the printed devices based on the physics-based model of the first component and the physical characteristic acquired of the plurality of the first components; and then modifying at least one of the fabrication steps performed during the fabricating of a subsequently-fabricated group of the printed devices to adjust the performance characteristic of the subsequently-fabricated group of the printed devices.

公开(公告)号：US09755041B2

公开(公告)日：2017-09-05

申请号：US14701502

申请日：2015-04-30

Applicant: Purdue Research Foundation

Inventor： Muhammad Ashraful Alam ,  Muhammad Masuduzzaman ,  Ankit Jain

IPC: G01L9/00 ,  H01L21/00 ,  H01L29/51 ,  H01L29/78 ,  H01L27/11502 ,  H01L27/11585 ,  B81B7/02 ,  H01G4/38 ,  H01L27/08 ,  H01G5/16 ,  H01G5/40 ,  H01G7/06 ,  H01L49/02

CPC classification number: H01L29/515 ,  B81B7/02 ,  B81B2201/014 ,  B81B2201/016 ,  B81B2201/07 ,  H01G4/38 ,  H01G5/16 ,  H01G5/40 ,  H01G7/06 ,  H01L27/0805 ,  H01L27/11502 ,  H01L27/11585 ,  H01L29/516 ,  H01L29/7842

Abstract: An electrical circuit comprising at least two negative capacitance insulators connected in series, one of the two negative capacitance insulators is biased to generate a negative capacitance. One of the negative capacitance insulators may include an air-gap which is part of a nanoelectromechnical system (NEMS) device and the second negative capacitance insulator includes a ferroelectric material. Both of the negative capacitance insulators may be located between the channel and gate of a field effect transistor. The NEMS device may include a movable electrode, a dielectric and a fixed electrode and arranged so that the movable electrode is attached to at least two points and spaced apart from the dielectric and fixed electrode, and the ferroelectric capacitor is electrically connected to either of the electrodes.

公开(公告)号：US20160379702A1

公开(公告)日：2016-12-29

申请号：US15263328

申请日：2016-09-12

Applicant: Purdue Research Foundation

Inventor： Muhammad Ashraful Alam ,  Muhammad Masuduzzaman

IPC: G11C11/22

CPC classification number: G11C11/225 ,  G11C7/04

Abstract: A method and apparatus for increasing the lifetime of ferroelectric devices is presented. The method includes applying a waveform to the input pulse to increase the rise or fall time of the pulse. The waveform may comprise a ramp, a step, or combinations of both. The waveform may be symmetrical with respect to the rising and falling edges of the pulses. A temperature control device may also be operatively connected to increase the temperature of the device to increase lifetime. In other embodiments, a resistance may be operatively connected in series with the ferroelectric device to increase lifetime.

Abstract translation: 介绍了一种提高铁电元件寿命的方法和装置。 该方法包括将波形应用于输入脉冲以增加脉冲的上升或下降时间。 波形可以包括斜坡，台阶或两者的组合。 波形可以相对于脉冲的上升沿和下降沿对称。 温度控制装置也可以可操作地连接以增加装置的温度以增加寿命。 在其他实施例中，电阻可以与铁电体器件串联可操作地连接以增加寿命。

公开(公告)号：US20210139942A1

公开(公告)日：2021-05-13

申请号：US16864048

申请日：2020-04-30

Applicant: Purdue Research Foundation

Inventor： SeyedehAida Ebrahimi ,  Muhammad Ashraful Alam

IPC: C12Q1/04 ,  G01N27/12 ,  G01N15/06

Abstract: A method and apparatus for electrically monitoring a time-varying liquid droplet whose conductivity is continuously modulated by osmoregulation response of cells. According to the method, the droplet impedance or conductance is monitored over time as the droplet shrinks due to evaporation. The monitoring data is then compared to calibration data which is obtained by monitoring a reference droplet. The result of the comparison is then used to determine the concentration of viable (live) biological material contained in the droplet.

公开(公告)号：US10312342B2

公开(公告)日：2019-06-04

申请号：US15695440

申请日：2017-09-05

Applicant: Purdue Research Foundation

Inventor： Muhammad Ashraful Alam ,  Muhammad Masuduzzaman ,  Ankit Jain

IPC: G01L9/00 ,  H01L21/00 ,  H01L29/51 ,  H01L29/78 ,  H01L27/11502 ,  H01L27/11585 ,  B81B7/02 ,  H01G4/38 ,  H01L27/08 ,  H01G5/16 ,  H01G5/40 ,  H01G7/06

Abstract: An electrical circuit comprising at least two negative capacitance insulators connected in series, one of the two negative capacitance insulators is biased to generate a negative capacitance. One of the negative capacitance insulators may include an air-gap which is part of a nanoelectromechnical system (NEMS) device and the second negative capacitance insulator includes a ferroelectric material. Both of the negative capacitance insulators may be located between the channel and gate of a field effect transistor. The NEMS device may include a movable electrode, a dielectric and a fixed electrode and arranged so that the movable electrode is attached to at least two points and spaced apart from the dielectric and fixed electrode, and the ferroelectric capacitor is electrically connected to either of the electrodes.

公开(公告)号：US09536692B2

公开(公告)日：2017-01-03

申请号：US14881185

申请日：2015-10-13

Applicant: Purdue Research Foundation

Inventor： Ankit Jain ,  Muhammad Ashraful Alam ,  Pradeep Nair

IPC: H01H51/22 ,  H01H59/00 ,  H03K17/975

CPC classification number: H01H59/0009 ,  H03K17/975

Abstract: A microelectromechanical system (MEMS)-based electrical switch. The electrical switch includes a moveable electrode, a dielectric layer positioned adjacent the moveable electrode on a first side of the dielectric layer and spaced apart from the moveable electrode when the moveable electrode is in an inactivated position and in contact with the moveable electrode when the moveable electrode is in an activated position, and a substrate attached to the dielectric layer on a second side opposite to the first side, the moveable electrode is configured to brake prior to coming in contact with the dielectric layer when the moveable electrode is switched between the inactivated state and the activated state.

Abstract translation: 一种基于微机电系统（MEMS）的电气开关。 电开关包括可移动电极，介电层位于电介质层的第一侧上邻近可移动电极并且当可移动电极处于非活动位置时与可移动电极间隔开并且当可移动电极处于与可移动电极接触时 电极处于激活位置，并且在与第一侧相对的第二侧上附着到电介质层的基板，可移动电极被配置为在可动电极在非激活状态下切换之前与电介质层接触时制动 状态和激活状态。