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    • 14. 发明授权
    • Semiconductor device
    • 半导体器件
    • US07151280B2
    • 2006-12-19
    • US11012205
    • 2004-12-16
    • Tetsuya HayashiMasakatsu HoshiSaichirou KanekoHideaki Tanaka
    • Tetsuya HayashiMasakatsu HoshiSaichirou KanekoHideaki Tanaka
    • H01L31/0312H01L31/072H01L31/109H01L31/0328H01L31/0336
    • H01L29/7806H01L29/1608H01L29/165H01L29/47H01L29/66068H01L29/7802H01L29/7803H01L29/7813H01L29/7817H01L29/782H01L29/7828
    • A semiconductor device includes a heterojunction semiconductor region 9, which forms a heterojunction with a drain region 2. The heterojunction semiconductor region 9 is connected to a source electrode 7, and has a band gap different from a band gap of a semiconductor substrate constituting the drain region 2. It is possible to set the size of an energy barrier against conduction electrons, which is formed between the drain region 2 and the heterojunction semiconductor region 9, into a desired size by changing the conductivity type or the impurity density of the heterojunction semiconductor region 9. This is a characteristic not found in a Schottky junction, in which the size of the energy barrier is inherently determined by a work function of a metal material. It is easy to achieve optimal design of a passive element in response to a withstand voltage system of a MOSFET as a switching element. It is also possible to suppress diffusion potential in a reverse conduction mode and to improve a degree of integration per unit area. As a result, it is possible to reduce the size of elements and to simplify manufacturing processes thereof.
    • 半导体器件包括异质结半导体区域9,其与漏极区域2形成异质结。异质结半导体区域9连接到源电极7,并且具有与构成漏极的半导体衬底的带隙不同的带隙 可以通过改变异质结半导体的导电类型或杂质浓度来将能量势垒的大小与形成在漏极区域2和异质结半导体区域9之间的传导电子设置成所需的尺寸 这是肖特基结中没有发现的特征,其中能量势垒的尺寸固有地由金属材料的功函数决定。 响应MOSFET的耐压系统作为开关元件,很容易实现无源元件的最佳设计。 也可以抑制反向导通模式的扩散电位,提高单位面积的积分度。 结果,可以减小元件的尺寸并简化其制造工艺。
    • 19. 发明申请
    • SEMICONDUCTOR DEVICE
    • 半导体器件
    • US20100001315A1
    • 2010-01-07
    • US12473604
    • 2009-05-28
    • Masaaki OKITAKazuyuki SawadaYuji HaradaSaichirou KanekoHiroto Yamagiwa
    • Masaaki OKITAKazuyuki SawadaYuji HaradaSaichirou KanekoHiroto Yamagiwa
    • H01L29/739H01L29/78
    • H01L29/0847H01L29/0634H01L29/0692H01L29/7393H01L29/7835H01L2029/42388H01L2924/0002H01L2924/00
    • A semiconductor device includes a first diffusion region of a second conductivity type formed in an upper portion of a semiconductor substrate of a first conductivity type, a second diffusion region formed in a surface portion of the first diffusion region, a third diffusion region of the second conductivity type formed a predetermined distance spaced apart from the second diffusion region in the surface portion of the semiconductor substrate, a fourth diffusion region of the first conductivity type formed adjacent to the third diffusion region and electrically connected to the third diffusion region, a gate electrode formed on a part between the first diffusion region and the third diffusion region, and an insulating film formed thereon. The impurity concentration of the first diffusion region is set higher than an impurity concentration at which a depletion region extending from an junction interface between the first diffusion region and the semiconductor substrate is formed in a part of the first diffusion region which is between the second diffusion region and the gate electrode when a voltage is applied to the second diffusion region.
    • 半导体器件包括形成在第一导电类型的半导体衬底的上部中的第二导电类型的第一扩散区域,形成在第一扩散区域的表面部分中的第二扩散区域,第二扩散区域的第二扩散区域 在半导体衬底的表面部分形成与第二扩散区间隔开的预定距离的导电类型,与第三扩散区相邻形成并与第三扩散区电连接的第一导电类型的第四扩散区,栅电极 形成在第一扩散区域和第三扩散区域之间的部分上,以及形成在其上的绝缘膜。 将第一扩散区域的杂质浓度设定为高于从第一扩散区域和半导体衬底之间的结界面延伸的耗尽区域形成在第一扩散区域的位于第二扩散区域的部分之间的杂质浓度 区域和栅电极,当电压施加到第二扩散区域时。