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    • 61. 发明授权
    • Micromechanical sensor and sensor fabrication process
    • 微机械传感器和传感器制造工艺
    • US5455419A
    • 1995-10-03
    • US189221
    • 1994-01-31
    • Thomas BayerJohann Greschner
    • Thomas BayerJohann Greschner
    • G01Q70/10B44C1/22B81C1/00C03C15/00C23F4/00G01B7/34G01B21/30G01Q60/04G01Q60/08G01Q60/16G01Q60/38G01Q70/16H01J9/14H01J37/00H01J37/28H01L21/306
    • G01Q60/38B82Y35/00G01Q60/04G01Q60/08G01Q60/16Y10S977/878
    • A method for producing micromechanical sensors for the AFM/STM/MFM profilometry is described in which a multiple step mask of cantilever beam and tip is transferred step by step into the wafer substrate by reactive ion etching. A particular highly anisotropic etching step is used for etching and shaping of the tip. This process step uses an Ar/Cl2 ambient at a pressure of about 100 .sup.6 bar and a self bias voltage of about 300 V DC. The ratio of pressure to self bias voltage determines the concave shape of the tip side- walls. This etching step is followed by a thermal oxidation step. The oxidation is carried out for a time until the oxidation fronts at the thinnest point of the tip shaft touch each other. A stripping process with buffered hydrofluoric acid gently removes the thermally grown oxide. The oxidation process allows--via oxidation time--a modification of tip height and angle in an extremely controllable manner. To prevent sticking of the tip to the structure to be profiled the ratio of tip diameter to tip height should be about 1:10. Should this ratio be exceeded the tip has to be arranged on a pedestal. The structure, comprising a cantilever beam and a tip on pedestal, can be produced with the same but slightly modified process of the invention.
    • 描述了用于AFM / STM / MFM轮廓测量法的微机械传感器的制造方法,其中悬臂梁和尖端的多步骤掩模通过反应离子蚀刻逐步转移到晶片衬底中。 特别是高度各向异性的蚀刻步骤用于尖端的蚀刻和成型。 该工艺步骤在约100 6bar的压力和约300V DC的自偏压下使用Ar / Cl2环境。 压力与自偏压的比率决定了顶端侧壁的凹形。 该蚀刻步骤之后是热氧化步骤。 氧化进行一段时间,直到尖端轴的最薄点处的氧化前沿相互接触。 用缓冲氢氟酸的汽提过程轻轻地除去热生长的氧化物。 氧化过程允许通过氧化时间 - 以极其可控的方式改变尖端高度和角度。 为了防止尖端粘附到待成型的结构上,尖端直径与尖端高度的比率应为约1:10。 如果超过该比率,则必须将尖端布置在基座上。 包括悬臂梁和基座上的尖端的结构可以用本发明的相同但略微改进的方法制造。
    • 66. 发明授权
    • Contact probe arrangement for electrically connecting a test system to
the contact pads of a device to be tested
    • 用于将测试系统电连接到待测试设备的接触垫的接触探针布置
    • US4843315A
    • 1989-06-27
    • US167676
    • 1988-03-14
    • Thomas BayerMichael ElsasserJohann GreschnerHeinrich SchmidRoland StohrOlaf WolterJurgen Wittlinger
    • Thomas BayerMichael ElsasserJohann GreschnerHeinrich SchmidRoland StohrOlaf WolterJurgen Wittlinger
    • G01R31/26G01R1/073G01R31/28
    • G01R1/07357
    • The contact probe arrangement includes a stack of perforated plates (1, 1a) through which extend a plurality contact probes. The stack of perforated plates consists of two kinds of plates. The first kind forms the lowermost plates (1a). They have circular or square holes permitting a vertical placing of the contact probes onto the contact pads (4) of the device (5) to be tested. The plates (1) of the second kind have oblong, rectangular, square, circular, elliptical or trapezoidal holes (3). With respect to the stacked plates of the second kind, alternate ones are offset against the two other adjacent plates which are aligned relative to each other, in such a manner that each contact probe is surrounded by part of the lower edge of the upper of two adjacent perforated plates, and part of the upper edge of the lower of two adjacent perforated plates. If axial stress is applied, the contact probe can thus not buckle any farther than to a part of the perforation wall limiting its maximum buckling. This ensures a sufficiently low contact resistance between the contact probe and the contact pad of the device to be tested. By using a corresponding number of perforated plates of the second kind the contact probes can adapt to height differences of the contact pads caused by irregularities in the surface of the device to be tested.
    • 接触探针装置包括多个多孔板(1,1a)的堆叠,通过该堆叠多个多孔板延伸多个接触探针。 多孔板堆叠由两种板组成。 第一种形成最下面的板(1a)。 它们具有允许将接触探针垂直放置在待测试装置(5)的接触垫(4)上的圆形或方形孔。 第二类的板(1)具有长方形,矩形,正方形,圆形,椭圆形或梯形孔(3)。 对于第二类的堆叠板,替代物相对于彼此对准的另外两个相邻的板偏移,使得每个接触探针被两个上部的下边缘的一部分包围 相邻的穿孔板和两个相邻多孔板的下部的上边缘的一部分。 如果施加轴向应力,则接触探针因此可能不会比限制其最大屈曲的穿孔壁的一部分更加弯曲。 这确保接触探针和待测试装置的接触垫之间的接触电阻足够低。 通过使用相应数量的第二种多孔板,接触探针可以适应由待测试装置的表面中的不规则引起的接触垫的高度差异。
    • 68. 发明授权
    • Method of compensating the proximity effect in electron beam projection
systems
    • 补偿电子束投影系统中邻近效应的方法
    • US4426584A
    • 1984-01-17
    • US270086
    • 1981-06-03
    • Harald BohlenHelmut EngelkeJohann GreschnerPeter Nehmiz
    • Harald BohlenHelmut EngelkeJohann GreschnerPeter Nehmiz
    • H01L21/027H01J37/317H01J3/26
    • B82Y10/00B82Y40/00H01J37/3174H01J2237/31769
    • For compensating scattering losses of electrons in photoresists (proximity effect) which influence electron beam lithography by altering the pattern geometry it is suggested to expose selected partial areas of a pattern to an additional irradiation dosage in a second exposure step. For that purpose, a specific mask with corresponding correction openings can be used which is applied with the same, or with a different electron beam intensity. In a particularly advantageous manner the correction of the proximity effect can be achieved when complementary masks are used; the correction openings for the partial areas of the one complementary mask are arranged in the other complementary mask. The proximity effect is then corrected without an additional exposure step. For measuring the proximity effect a photo-optical process is suggested where line patterns with decreasing ridge width in the photoresist are defined through electron beam projection, and where the developing process of the photoresist is discontinued prematurely. The ridge edges which in the presence of the proximity effect are asymmetrical can be easily detected under the microscope.
    • 为了补偿通过改变图案几何影响电子束光刻的光致抗蚀剂(邻近效应)中的电子的散射损失,建议在第二曝光步骤中将图案的所选部分区域暴露于另外的照射剂量。 为此,可以使用具有相应校正开口的特定掩模,其应用相同或具有不同的电子束强度。 在特别有利的方式中,当使用互补掩模时可以实现邻近效应的校正; 一个互补掩模的部分区域的校正开口布置在另一个互补掩模中。 然后在没有额外的曝光步骤的情况下校正邻近效果。 为了测量接近效应,建议在光致抗蚀剂中具有减小的脊宽​​度的线图案通过电子束投影来限定光致抗蚀剂的显影过程以及光致抗蚀剂的显影过程过早地停止的情况。 在接近效应的存在下的脊边缘是不对称的,可以在显微镜下容易地检测。
    • 69. 发明授权
    • Alignment system for particle beam lithography
    • 粒子束光刻对准系统
    • US4370554A
    • 1983-01-25
    • US183118
    • 1980-09-02
    • Harald BohlenJohann GreschnerWerner KulckePeter Nehmiz
    • Harald BohlenJohann GreschnerWerner KulckePeter Nehmiz
    • H01J37/304H01L21/68G01N23/00
    • H01J37/3174B82Y10/00B82Y40/00H01J37/3045H01L21/682
    • The mutual alignment of mask and substrate patterns of a specific semiconductor structure are attained by use of a plurality of individual marks in a specific geometric position with respect to each other. By the arrangement of openings in the alignment pattern of the mask, the broad electron beam is split into a multitude of individual beams which interact with alignment marks on the substrate. The interaction is used to generate a coincidence signal. The signal to noise ratio of this arrangement is determined by the overall current and is comparable to that of a thin concentrated electron beam. Registration is effected in a small amount of time and the disadvantageous effects of the high current density used in the raster process are not a factor. In a preferred embodiment, the alignment pattern of the mask is a matrix with center spacings of openings increasing upon advance in two directions perpendicular to each other such that no distance can be represented by the sum of smaller distances. Alignment signals are provided by detecting either absorbed or reflected electrons. A plurality of detectors in the mask are used to detect the reflected electrons.
    • 通过使用相对于彼此的特定几何位置中的多个单独的标记来获得特定半导体结构的掩模和衬底图案的相互对准。 通过在掩模的对准图案中布置开口,宽电子束被分成与基板上的对准标记相互作用的多个单独的光束。 该交互用于产生符合信号。 该布置的信噪比由总电流确定,并且与薄的集中电子束的信噪比相当。 注册在少量时间内进行,并且在光栅处理中使用的高电流密度的不利影响不是因素。 在优选实施例中,掩模的对准图案是矩阵,其中开口的中心间隔在彼此垂直的两个方向上预先增加,使得距离可以由较小距离的和表示。 通过检测吸收或反射的电子来提供对准信号。 掩模中的多个检测器用于检测反射的电子。