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    • 13. 发明授权
    • Method of forming variable thickness gate dielectrics
    • 形成可变厚度栅极电介质的方法
    • US6033998A
    • 2000-03-07
    • US38684
    • 1998-03-09
    • Sheldon AronowitzDavid ChanJames KimballDavid LeeJohn HaywoodValeriy Sukharev
    • Sheldon AronowitzDavid ChanJames KimballDavid LeeJohn HaywoodValeriy Sukharev
    • H01L21/8234H01L21/76
    • H01L21/823462
    • Provided is a method of fabricating gate dielectric layers having variable thicknesses and compositions over different regions of a semiconductor wafer. In a preferred embodiment of the present invention, a gate oxide layer is first grown over the various regions. Regions that are to have a relatively thicker, unhardened gate dielectric are masked and the wafer is exposed to a remote low energy nitrogen plasma. After the nitridization process is completed, the mask is removed and the wafer is exposed to further oxidation. The regions where oxynitrides have been formed act as a barrier to the oxidation process. Consequently, different oxide thicknesses can be grown on the same wafer, thinner and hardened where nitridization has been performed, and thicker and not hardened in those regions that were masked during the nitridization. Variable thickness gate dielectrics in accordance with the present invention may be particularly advantageous in semiconductor integrated circuits involving both digital and analog devices.
    • 提供一种制造在半导体晶片的不同区域上具有可变厚度和组成的栅极电介质层的方法。 在本发明的优选实施例中,首先在各个区域上生长栅氧化层。 具有相对较厚,未硬化的栅极电介质的区域被掩蔽,并且晶片暴露于远程低能量氮等离子体。 在氮化处理完成之后,去除掩模并使晶片进一步氧化。 已经形成氮氧化物的区域用作氧化过程的屏障。 因此,可以在相同的晶片上生长不同的氧化物厚度,在已经进行氮化的情况下更薄并且硬化,并且在氮化期间被掩蔽的那些区域中较厚而不硬化。 根据本发明的可变厚栅极电介质在涉及数字和模拟装置的半导体集成电路中可能是特别有利的。
    • 14. 发明授权
    • Process for low energy implantation of semiconductor substrate using
channeling to form retrograde wells
    • 使用沟渠形成逆行井的半导体衬底的低能量注入工艺
    • US5904551A
    • 1999-05-18
    • US631360
    • 1996-04-12
    • Sheldon AronowitzJames Kimball
    • Sheldon AronowitzJames Kimball
    • H01L21/265H01L21/70
    • H01L21/26513H01L21/26586
    • A process is disclosed for forming one or more doped regions beneath the surface of a single crystal semiconductor substrate, such as retrograde wells or deeper source/drain regions, by implantation at low energy which comprises orienting the crystal lattice of the semiconductor substrate, with respect to the axis of the implantation beam, i.e., the path of the energized atoms in the implantation beam, to maximize the number of implanted atoms which pass between the atoms in the crystal lattice. This results in the peak concentration of implanted atoms in the crystal lattice of the single crystal semiconductor substrate being deeper than the peak concentration of implanted atoms in the substrate would be if the axis of the implantation beam were not so oriented with respect to the crystal lattice of the semiconductor substrate during implantation.
    • 公开了一种用于通过以低能量注入(包括使半导体衬底的晶格定向)来在单晶半导体衬底的表面下方形成一个或多个掺杂区域(例如逆行阱或较深源极/漏极区域)的方法, 到注入光束的轴线,即注入光束中的激发原子的路径,以使在晶格中的原子之间通过的注入原子的数量最大化。 这导致单晶半导体衬底的晶格中的注入原子的峰值浓度比衬底中注入原子的峰值浓度更深,如果注入光束的轴不相对于晶格取向 的半导体衬底。
    • 17. 发明申请
    • Electrostatic dust collection wand
    • 静电除尘魔杖
    • US20070192972A9
    • 2007-08-23
    • US10857154
    • 2004-05-28
    • James Kimball
    • James Kimball
    • A47L13/40
    • A47L13/40A47L13/38
    • An electrostatic dust wand has a handle, a triboelectric charge generator, and a fibrous material. The triboelectric charge generator is coupled to the handle, and generates an electrostatic charge to attract dust particles to the cleaning implement. The fibrous material at least partially covers the triboelectric charge generator, to collect and to retain dust particles. The triboelectric charge generator has at least one movable member having a first triboelectric property, and an actuator for driving the at least one movable member. The electrostatic charge may be generated by movement of he at least one movable member against the fibrous material. Alternatively, or in addition, the electrostatic charge may be generated by relative movement of two members of the triboelectric charge generator against one another.
    • 静电防尘棒具有手柄,摩擦电荷发生器和纤维材料。 摩擦电荷发生器耦合到手柄,并产生静电荷以将尘埃颗粒吸引到清洁器具上。 纤维材料至少部分地覆盖摩擦电荷发生器,以收集和保留灰尘颗粒。 所述摩擦电荷发生器具有至少一个具有第一摩擦学特性的可移动部件和用于驱动所述至少一个可移动部件的致动器。 静电电荷可以通过使至少一个可动构件抵靠纤维材料移动而产生。 或者或另外,静电电荷可以通过摩擦电荷发生器的两个部件相对于彼此的相对运动而产生。
    • 19. 发明授权
    • Oxide formed in semiconductor substrate by implantation of substrate
with a noble gas prior to oxidation
    • 通过在氧化之前用惰性气体注入衬底,在半导体衬底中形成氧化物
    • US5739580A
    • 1998-04-14
    • US788403
    • 1997-01-27
    • Sheldon AronowitzJames Kimball
    • Sheldon AronowitzJames Kimball
    • H01L21/265H01L21/316H01L21/762H01L23/58H01L29/00
    • H01L21/02238H01L21/02255H01L21/02299H01L21/26506H01L21/31662H01L21/76213Y10S438/911
    • A process and resulting product is described for forming an oxide in a semiconductor substrate which comprises initially implanting the substrate with atoms of a noble gas, then oxidizing the implanted substrate at a reduced temperature, e.g., less than 900.degree. C., to form oxide in the implanted region of the substrate, and then etching the oxidized substrate to remove a portion of the oxide. The resulting oxidation produces a dual layer of oxide in the substrate. The upper layer is an extremely porous and frothy layer of oxide, while the lower layer is a more dense oxide. The upper porous layer of oxide can be selectively removed from the substrate by a mild etch, leaving the more dense oxide layer in the substrate. Further oxide can then be formed adjacent the dense layer of oxide in the substrate, either by oxide deposition over the dense oxide or by growing further oxide beneath the dense oxide layer. The initial oxide formed by the process appears to be temperature independent, at temperatures of 900.degree. C. or less, with oxide formation apparently dependent upon the extent of the implanted regions of the substrate, rather than upon temperature, resulting in thermal savings. Furthermore, the excess implanted noble gas in the substrate adjacent the oxide formed therein can have beneficial effects in inhibiting the formation of parasitic field transistors and in greater control over field thresholds.
    • 描述了一种工艺和产生的产品,用于在半导体衬底中形成氧化物,其包括首先用惰性气体原子注入衬底,然后在降低的温度例如低于900℃下氧化注入的衬底,以形成氧化物 在衬底的注入区域中,然后蚀刻氧化的衬底以除去氧化物的一部分。 所产生的氧化物在衬底中产生双层氧化物。 上层是氧化物极其多孔和泡沫层,而下层是更致密的氧化物。 氧化物的上部多孔层可以通过温和的蚀刻从衬底中选择性地去除,从而在衬底中留下更致密的氧化物层。 然后可以通过在致密氧化物上的氧化物沉积或通过在致密氧化物层下生长另外的氧化物在衬底中的致密氧化物层附近形成氧化物。 通过该方法形成的初始氧化物在900℃或更低的温度下似乎与温度无关,氧化物形成显然取决于衬底的注入区域的程度,而不是温度,导致热量节省。 此外,与其中形成的氧化物相邻的衬底中的过量注入的惰性气体可以在抑制寄生场晶体管的形成和对场阈值的更大控制方面具有有益的效果。
    • 20. 发明授权
    • Process for making group IV semiconductor substrate treated with one or
more group IV elements to form one or more barrier regions capable of
inhibiting migration of dopant materials in substrate
    • 制备用一种或多种IV族元素处理的IV族半导体衬底以形成能够抑制衬底中掺杂剂材料迁移的一个或多个势垒区的方法
    • US5654210A
    • 1997-08-05
    • US434673
    • 1995-05-04
    • Sheldon AronowitzJames Kimball
    • Sheldon AronowitzJames Kimball
    • H01L21/265
    • H01L21/26506H01L21/26513
    • Formation of a barrier region in a single crystal group IV semiconductor substrate at a predetermined spacing from a doped region in the substrate is described to prevent or inhibit migration of dopant materials from an adjacent doped region through the barrier region. By implantation of group IV materials into a semiconductor substrate to a predetermined depth in excess of the depth of a doped region, a barrier region can be created in the semiconductor to prevent migration of the dopants from the doped region through the barrier region. The treatment of the single crystal substrate with the group IV material is carried out at a dosage and energy level sufficient to provide such a barrier region in the semiconductor substrate, but insufficient to result in amorphization (destruction) of the single crystal lattice of the semiconductor substrate. In another embodiment, a similar barrier region may be formed in the semiconductor substrate but at a depth less than that of the doped region to inhibit migration of the dopant to the surface of the substrate. Such barrier regions may be formed in the substrate both above and below the doped region to inhibit migration of the dopant in the doped region in either direction.
    • 描述了以与衬底中的掺杂区域预定间隔的单晶IV IV半导体衬底中的阻挡区域的形成,以防止或抑制掺杂剂材料通过阻挡区域从相邻掺杂区域的迁移。 通过将IV族材料注入到半导体衬底中至超过掺杂区域的深度的预定深度,可以在半导体中产生阻挡区域,以防止掺杂剂从掺杂区域迁移穿过阻挡区域。 用IV族材料处理单晶衬底以足以在半导体衬底中提供这种势垒区域的剂量和能级进行,但不足以导致半导体单晶晶格的非晶化(破坏) 基质。 在另一个实施例中,可以在半导体衬底中形成类似的阻挡区,但是深度小于掺杂区的深度,以抑制掺杂剂向衬底表面的迁移。 这样的阻挡区域可以在掺杂区域的上方和下方的衬底中形成,以抑制掺杂区域在任一方向上的迁移。