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    • 1. 发明公开
    • Improvements in or relating to field effect transistors
    • 场效应晶体管或与之相关的改进
    • EP0849803A3
    • 1999-12-22
    • EP97122525.5
    • 1997-12-19
    • Texas Instruments Incorporated
    • Chen, Ih-Chin
    • H01L29/06H01L21/331
    • H01L29/66651H01L21/76202H01L29/0653H01L29/41766H01L29/41775Y10S438/969
    • A method for forming a transistor (50) includes forming a first insulating region (16) in the outer surface of a semiconductor body (10) and forming a second insulating region (16) in the outer surface of the semiconductor body (10) and spaced apart from the first insulating region by a region of semiconductor material. The method further includes planarizing the first and second insulating regions and the region of semiconductor material to define a planar surface (17) and forming a conductive source region (34) overlying the first insulating region. The method further includes forming a conductive drain region (36) overlying the second insulating region and forming a conductive gate body (24) overlying the planar surface (17) and spaced apart from the conductive source region (34) and the conductive drain region (36).
    • 一种用于形成晶体管(50)的方法包括:在半导体本体(10)的外表面中形成第一绝缘区域(16);以及在半导体本体(10)的外表面中形成第二绝缘区域(16);以及 与第一绝缘区域隔开一半导体材料区域。 该方法还包括平坦化第一绝缘区域和第二绝缘区域以及半导体材料区域以限定平坦表面(17)并形成覆盖第一绝缘区域的导电源极区域(34)。 该方法进一步包括形成覆盖第二绝缘区域的导电漏极区域(36),并形成覆盖平坦表面(17)且与导电源极区域(34)和导电漏极区域(24)间隔开的导电栅极本体(24) 36)。
    • 2. 发明公开
    • Bipolar transistor and fabrication method thereof
    • EP0768716A3
    • 1997-07-30
    • EP96116520.6
    • 1996-10-15
    • NEC CORPORATION
    • Sato, Fumihiko
    • H01L29/732H01L29/737H01L21/331
    • H01L29/66287H01L29/66242H01L29/732H01L29/7378Y10S438/969
    • A semiconductor device including a bipolar transistor is provided, which can reduce the base resistance of the transistor. This device includes a semiconductor substructure having a first semiconductor active region of a first conductivity type in its inside. A first insulating layer is formed on the main surface of the substructure to cover the first active region. The first insulating layer has a first penetrating window exposing the first active region. A semiconductor contact region of a second conductivity type is formed on the first insulating layer. The contact region has an overhanging part which overhangs the first window. The second window is defined by the inner end of the overhanging part to be entirely overlapped with the first window. The contact region is made of a polycrystalline semiconductor. A second semiconductor active region of the second conductivity type is formed on the first active region in the first window. A semiconductor connection region of the second conductivity type is formed in the first window to surround the second active region. The connection region is contacted with the overhanging part of the contact region and the second active region, thereby electrically interconnecting the second active region with the contact region. The connection region is made of a polycrystalline semiconductor.
    • 9. 发明公开
    • Process for forming III-V semiconductor MESFET devices, having self-aligned raised source and drain regions
    • Verfahren zur Herstellung von AIII Bs MESFETS miterhöhterSource und Drainzonen。
    • EP0083716A2
    • 1983-07-20
    • EP82110810.7
    • 1982-11-23
    • International Business Machines Corporation
    • Andrade, Thomas L.
    • H01L21/203H01L29/80H01L29/08H01L29/64
    • H01L29/0891H01L21/02395H01L21/02546H01L21/02631H01L21/02658H01L29/475H01L29/812Y10S148/088Y10S148/10Y10S148/105Y10S148/169Y10S438/969
    • A process for forming III-V semiconductor MESFET devices having self-aligned, raised source and drain regions is disclosed. A preferred embodiment relates to a process for forming gallium arsenide MESFET devices. A feature of the invention is placing a gate structure 5 on the gallium arsenide substrate 2. Then a process including molecular beam epitaxy, grows epitaxial gallium arsenide on each respective side of the gate 5, forming a raised source region 8 and a raised drain region 9. Gallium arsenide will not grow in a conductive state on top of the tungsten gate metal 5. The resulting MESFET device has a raised source 8 and drain 9 which significantly reduces the high resistance depleted surface adjacent to the gate which generally occurs in planar gallium arsenide MESFET devices. Furthermore, the MESFET channel region which is defined by the proximate edges of the source and the drain. is self- aligned with the edges of the gate by virtue of the insitu process for the formation of the source and drain, as described above.
    • 公开了一种用于形成具有自对准,升高的源极和漏极区域的III-V半导体MESFET器件的工艺。 优选的实施方案涉及用于形成砷化镓MESFET器件的工艺。 本发明的一个特征是将栅极结构5放置在砷化镓衬底2上。然后,包括分子束外延的工艺在栅极5的每个相应侧上生长外延砷化镓,形成升高的源极区8和升高的漏极区 砷化镓在钨栅极金属5的顶部将不会在导电状态下生长。所得的MESFET器件具有升高的源极8和漏极9,其显着地减少了通常发生在平面镓中的与栅极相邻的高电阻耗尽表面 砷化物MESFET器件。 此外,如上所述,由源极和漏极的近边缘限定的MESFET沟道区域通过用于形成源极和漏极的本征工艺与栅极的边缘自对准。
    • 10. 发明公开
    • Semiconductor device having pairs of vertical complementary bipolar transistors and method of fabrication therefor
    • 具有垂直互补双极晶体管对,和它们的制备方法的半导体器件。
    • EP0021393A1
    • 1981-01-07
    • EP80103534.6
    • 1980-06-24
    • International Business Machines Corporation
    • Silvestri, Victor J.Tang, Denny D.Wiedmann, Siegfried K.
    • H01L21/82H01L27/02G11C11/40
    • H01L21/82285G11C11/4113H01L21/743H01L21/763H01L27/0237Y10S438/969
    • A vertical pair (2) of complementary, bipolar transistors which includes a semiconductor substrate (8) of one conductivity type and a pair of dielectric isolation regions (9, 10) disposed in contiguous relationship with the substrate. An injector region (3) of opposite conductivity type is disposed between the pair of isolation regions (9, 10). A pair of heavily doped polycrystalline semiconductor regions (6, 5) of the one conductivity type is disposed over and in registry with the pair of isolation regions (9, 10). A single crystal semiconductor region (18) of the one conductivity type is disposed over and in registry with the injector region (3). Finally, a first zone (16) of opposite conductivity type is disposed in the single crystal region and a second zone (14) of the one conductivity type is disposed in the first zone (16). To form a memory cell, another vertical pair (2') of complementary, bipolar transistors like those just described is disposed in electrically isolated, spaced relationship with the first mentioned vertical pair (2) of complementary bipolar transistors. These pairs (2, 2') of transistors are arranged so that an isolation region (9) and a polycrystalline region (6) of each are common. To form the memory cell, the first and second zones (16,14; 16', 14') of each of the pairs are cross-coupied.
      In addition, a method of manufacturing a semiconductor device having vertical complementary, bipolar transistors which includes the steps of forming regions (9,10) of dielectric isolation which are contiguous with a semiconductor substrate (8) and a region (3) of semiconductor of one conductivity type there-between, the semiconductor substrate (8) being of opposite conductivity type, forming regions (6, 5) of heavily doped, polycrystalline semiconductor of the opposite conductivity type and a region of single crystal semiconductor (18) of the opposite conductivity type in registry with the regions of dielectric isolation (9, 10) and the semiconductor region (18) of one conductivity type, respectively. The method also includes the step of forming a zone (16) of one conductivity type in the region (18) of singly crystal semiconductor and a zone (14) of opposite conductivity type in the zone (16) of one conductivity type. The method may be used to fabricate a buried injector memory cell.