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    • 7. 发明申请
    • pHEMT with barrier optimized for low temperature operation
    • pHEMT具有针对低温操作优化的阻挡层
    • US20060220062A1
    • 2006-10-05
    • US11100095
    • 2005-04-05
    • Bruce GreenOlin HartinEllen LanPhilip LiMonte MillerMatthias PasslackMarcus RayCharles Weitzel
    • Bruce GreenOlin HartinEllen LanPhilip LiMonte MillerMatthias PasslackMarcus RayCharles Weitzel
    • H01L29/739
    • H01L29/7785
    • In one embodiment, a semiconductor device (500) includes a buffer layer (504) formed over a substrate (502). An AlxGa1-xAs layer (506) is formed over the buffer layer (504) and has a first doped region (508) formed therein. An InxGa1-xAs channel layer (512) is formed over the AlxGa1-xAs layer (506). An AlxGa1-xAs layer (518) is formed over the InxGa1-xAs channel layer (512), and the AlxGa1-xAs layer (518) has a second doped region formed therein. A GaAs layer (520) having a first recess is formed over the AlxGa1-xAs layer (518). A control electrode (526) is formed over the AlxGa1-xAs layer (518). A doped GaAs layer (524) is formed over the undoped GaAs layer (520) and on opposite sides of the control electrode (526) and provides first and second current electrodes. When used to amplify a digital modulation signal, the semiconductor device (500) maintains linear operation over a wide temperature range.
    • 在一个实施例中,半导体器件(500)包括形成在衬底(502)上的缓冲层(504)。 在缓冲层(504)之上形成Al x Ga 1-x As层(506),并且在其中形成有第一掺杂区域(508)。 在Al x Ga 1-x 上形成一个In 1 / x Ga 1-x As As沟道层(512) >作为层(506)。 在In 1 x 1 Ga 1-x N上形成Al x Ga 1-x As层(518) 作为沟道层(512)和Al x Ga 1-x As层(518)具有形成在其中的第二掺杂区域。 具有第一凹陷的GaAs层(520)形成在Al 1 Ga 1-x As层(518)上。 控制电极(526)形成在Al 1 Ga 1-x As As层(518)上。 在未掺杂的GaAs层(520)上和控制电极(526)的相对侧上形成掺杂GaAs层(524),并提供第一和第二电流电极。 当用于放大数字调制信号时,半导体器件(500)在宽的温度范围内保持线性操作。
    • 8. 发明申请
    • InGaP pHEMT device for power amplifier operation over wide temperature range
    • InGaP pHEMT器件用于宽温度范围内的功率放大器工作
    • US20050104087A1
    • 2005-05-19
    • US10881162
    • 2004-06-30
    • Ellen LanMonica De BacaBruce GreenMonte MillerCharles Weitzel
    • Ellen LanMonica De BacaBruce GreenMonte MillerCharles Weitzel
    • H01L29/778H03F1/30H01L31/0328H01L29/739
    • H03F1/301H01L29/7785
    • In one embodiment, a semiconductor device (500) includes a buffer layer (504) formed over a substrate (502). An AlxGa1-xAs layer (506) is formed over the buffer layer (504) and has a first doped region (508) formed therein. An InxGa1-xAs channel layer (512) is formed over the AlxGa1-xAs layer (506). An InxGa1-xP barrier layer (518) is formed over the InxGa1-xAs channel layer (512), the InxGa1-xP layer (518) has a second doped region formed therein. A control electrode (526) is formed over the InxGa1-xP layer (518). An undoped GaAs layer (520) is formed over the InxGa1-xP layer (518) adjacent to the control electrode (526). A doped GaAs layer (524) is formed over the undoped GaAs layer (520) and on opposite sides of the control electrode (526) and provides first and second current electrodes. When used to amplify a digital modulation signal, the semiconductor device (500) maintains linear operation over a wide temperature range.
    • 在一个实施例中,半导体器件(500)包括形成在衬底(502)上的缓冲层(504)。 在缓冲层(504)之上形成Al x Ga 1-x As层(506),并且在其中形成有第一掺杂区域(508)。 在Al x Ga 1-x 上形成一个In 1 / x Ga 1-x As As沟道层(512) >作为层(506)。 在In 1 / x Ga 1-x 作为沟道层(512),In 1 / x Ga 1-x P层(518)具有形成在其中的第二掺杂区域。 控制电极(526)形成在In 1 x 1 Ga 1-x P层(518)上。 在与控制电极(526)相邻的In 1 x 1 Ga 1-x P P层(518)上形成未掺杂的GaAs层(520)。 在未掺杂的GaAs层(520)上和控制电极(526)的相对侧上形成掺杂GaAs层(524),并提供第一和第二电流电极。 当用于放大数字调制信号时,半导体器件(500)在宽的温度范围内保持线性操作。
    • 9. 发明授权
    • Variable conducting element and method of programming
    • 可变导体元件及编程方法
    • US5886920A
    • 1999-03-23
    • US982175
    • 1997-12-01
    • Daniel S. MarshallJerald Allen HallmarkDavid J. AndersonEllen Lan
    • Daniel S. MarshallJerald Allen HallmarkDavid J. AndersonEllen Lan
    • G11C11/22G11C11/24
    • G11C11/22G11C11/223
    • A variable conducting element (10) and method for programming a constant current or constant resistance provided at output terminals (24 and 26) of a ferroelectric transistor (12). The ferroelectric transistor (12) has portions of a ferroelectric material (32A) programmed having up-polarization states separated by domain walls (34) from portions of a ferroelectric material (32B) programmed having down-polarization states. The portion of the ferroelectric material (32A) programmed in the up-polarization state forms current conduction channels between a source region (23) and a drain region (25) of the ferroelectric transistor (12). The ferroelectric transistor (12) is programmed through a capacitor (14) to adjust the charge supplied to a control terminal (22) of the ferroelectric transistor (12).
    • 一种用于编程在铁电晶体管(12)的输出端(24和26)处提供的恒定电流或恒定电阻的可变导体元件(10)和方法。 铁电晶体管(12)具有编程具有由畴壁(34)与被编程为具有向下极化状态的铁电材料(32B)的部分分离的上极化状态的铁电材料(32A)的部分。 以上极化状态编程的铁电材料(32A)的部分在铁电晶体管(12)的源极区(23)和漏极区(25)之间形成电流传导沟道。 铁电晶体管(12)通过电容器(14)编程,以调节提供给铁电晶体管(12)的控制端子(22)的电荷。