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    • 53. 发明授权
    • Method of producing SOI structures
    • 生产SOI结构的方法
    • US5061655A
    • 1991-10-29
    • US653086
    • 1991-02-11
    • Takashi IpposhiKozuyuki Sugahara
    • Takashi IpposhiKozuyuki Sugahara
    • H01L21/20H01L21/263H01L21/321H01L21/762
    • H01L21/2026H01L21/321H01L21/76248Y10S117/904Y10S148/093Y10S148/154
    • A method of producing so-called SOI structures according to this invention includes the step of forming an opening for seeding after an insulating layer of predetermined thickness has been formed on a first monocrystal silicon layer. Further, a non-monocrystal layer, e.g., a polycrystal silicon layer is formed on the surface of the insulating layer. The surface of the polycrystal silicon layer is smoothed as by grinding. A reflection-preventive film is formed on the smoothed surface of the polycrystal silicon layer. The reflection-preventive film has a thin film region whose reflectance is substantially zero and a thick film region having a predetermined reflectance. During laser annealing, the reflection-preventive film produces a predetermined temperature distribution in the polycrystal silicon layer. The polycrystal silicon layer which has melted according to this temperature distribution recrystallizes from adjacent the seed portion and thereby forms a new monocrystal silicon layer over the entire surface. The smoothing process for the polycrystal silicon layer prevents any change in the reflectance of the reflection-preventive film and improves control on the temperature distribution in the polycrystal silicon layer.
    • 根据本发明的制造所谓的SOI结构的方法包括在第一单晶硅层上形成预定厚度的绝缘层之后形成用于接种​​的开口的步骤。 此外,在绝缘层的表面上形成非单晶层,例如多晶硅层。 多晶硅层的表面通过研磨而平滑化。 在多晶硅层的平滑表面上形成防反射膜。 防反射膜具有反射率基本为零的薄膜区域和具有预定反射率的厚膜区域。 在激光退火期间,防反射膜在多晶硅层中产生预定的温度分布。 根据该温度分布熔融的多晶硅层从种子部分相邻再结晶,从而在整个表面上形成新的单晶硅层。 多晶硅层的平滑处理防止防反射膜的反射率的任何变化,并且改善对多晶硅层中的温度分布的控制。
    • 57. 发明授权
    • Method of forming intermediate buffer films with low plastic deformation
threshold using lattice mismatched heteroepitaxy
    • 使用晶格失配的异质外延形成具有低塑性变形阈值的中间缓冲膜的方法
    • US4935385A
    • 1990-06-19
    • US223036
    • 1988-07-22
    • David K. Biegelsen
    • David K. Biegelsen
    • H01L21/20H01L21/36
    • H01L21/02381H01L21/0237H01L21/02439H01L21/02469H01L21/02474H01L21/02477H01L21/02546Y10S117/913Y10S148/025Y10S148/097Y10S148/149Y10S148/154Y10S438/933
    • Intermediate buffer films having a low plastic deformation threshold are provided for absorbing defects due to lattice mismatch and/or thermal coefficient of expansion mismatch between a substrate or layer support and an overlayer while concurrently providing a good template for subsequent crystalline growth at the overlayer. This is accomplished for diamond cubic structure substrates, such as Si or Ge or Si on sapphire or crystalline Si on glass, upon which are to be deposited lattice mismatch overlayers, such as, GaAs or ZnSe. Also, zinc blend type substrates, such as GaAs or InP may be employed with such intermediate buffer films. A characteristic of these intermediate buffer films is a substantially lower plastic deformation threshold compared to either the substrate support or the overlayer to be grown heteroepitaxially thereon. In particular, such high plastic deformable compound materials found suitable for such an intermediate buffer film are cubic III-V, II-VI or a I-VII zinc blend compound materials, respectively and specifically, (Zn.sub.X Cd.sub.Y Hg.sub.1-X-Y)(S.sub.A Se.sub.B Te.sub.1-A-B) and Cu(Cl.sub.X Br.sub.Y I.sub.1-X-Y) wherein X or Y respectively range between 0 and 1 such that X+ Y.ltoreq.1 and A and B respectively range between 0 and 1 such that A+B.ltoreq.1. Particular examples are GaAs, ZnSe, ZnS.sub.x Se.sub.1-x, CdS.sub.x Se.sub.1-x, HgS.sub.x Se.sub.1-x, CuCl, CuBr or CuI, et al.
    • 提供具有低塑性变形阈值的中间缓冲膜用于吸收由于晶格失配和/或基底或层载体与覆盖层之间的膨胀失配的热系数而引起的缺陷,同时为覆盖层上随后的晶体生长同时提供良好的模板。 这对于金刚石立方结构衬底(例如蓝宝石上的Si或Ge或玻璃上的晶体Si),其上将沉积的晶格失配覆盖层(例如GaAs或ZnSe)而言是完成的。 此外,可以使用诸如GaAs或InP的锌共混型衬底与这种中间缓冲膜。 与衬底支撑体或异质外延生长的覆盖层相比,这些中间缓冲膜的特征是相当低的塑性变形阈值。 特别地,适用于这种中间缓冲膜的这种高塑性可变形化合物材料分别是立方体III-V,II-VI或I-VII锌混合物,分别具体地(ZnXCdYHg1-XY)(SASeBTe1-AB) 和Cu(ClXBrYI1-XY),其中X或Y分别在0和1之间变化,使得X + Y 1和A和B分别在0和1之间变化,使得A + B <1。 具体实例是GaAs,ZnSe,ZnSxSe1-x,CdSxSe1-x,HgSxSe1-x,CuCl,CuBr或CuI等。
    • 58. 发明授权
    • Method of electrically adjusting the zener knee of a lateral polysilicon
zener diode
    • 电子调整侧面多晶硅齐纳二极管的齐纳膝盖的方法
    • US4646427A
    • 1987-03-03
    • US625751
    • 1984-06-28
    • James T. Doyle
    • James T. Doyle
    • G11C17/08G11C17/16H01L21/326H01L21/768H01L29/04H01L29/866
    • H01L29/04G11C17/08G11C17/16H01L21/326H01L21/76888H01L29/866Y10S148/013Y10S148/018Y10S148/055Y10S148/122Y10S148/154Y10S148/174Y10S438/983
    • In a method of electrically altering the characteristics of a semiconductor device, a lateral polysilicon zener diode's zener knee voltage may be shifted either to a higher or lower voltage. An electrical potential may be applied in the forward direction to shift the zener knee to a higher voltage level. An electrical potential may be applied in the reverse bias direction to shift the zener knee to a lower voltage. In the limit, the zener may be changed into a forward diode of reverse polarity with respect to the original zener. The electrical potential used should be of appropriate magnitude to melt the polysilicon without damage to the zener's terminals. This induces migration of the impurities causing a rediffusion of impurities thereby altering the characteristics of the diode. This method may be used to program a PROM by either converting the zener to a diode or not to program each binary bit. The device may also be used as an analog memory element by setting an entire word equal to a predetermined zener knee voltage.
    • 在电子改变半导体器件的特性的方法中,横向多晶硅齐纳二极管的齐纳拐点电压可以移动到更高或更低的电压。 可以向前方向施加电位以将齐纳膝盖移动到更高的电压水平。 可以在反向偏置方向上施加电位以将齐纳膝盖移动到较低的电压。 在极限情况下,可以将齐纳二极管变成相对于原始齐纳二极管的正极二极管。 所使用的电位应该是适当的大小,以熔化多晶硅而不损坏齐纳尔的端子。 这引起杂质的迁移,导致杂质的再扩散,从而改变二极管的特性。 该方法可用于通过将齐纳二极管转换为二极管来编程PROM来对每个二进制位进行编程。 该设备也可以通过设置等于预定的齐纳膝盖电压的整个字来用作模拟存储器元件。