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IBM Journal of Research and Development

Issue 5 • Date Sept. 1967

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Displaying Results 1 - 15 of 15
  • Reverberation Chamber Determination of the Acoustic Power of Pure-Tone Sources

    Publication Year: 1967, Page(s):492 - 501
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (558 KB)

    A method was developed that is used to determine the acoustic power radiated by pure-tone and “nearly-pure-tone” sources in a reverberation chamber. The 3-dimensional standing wave sound field generated by a pure-tone source is sampled by a microphone that slowly sweeps a circular path in the chamber. The method relates the average value of the sound pressure at the peaks of the ... View full abstract»

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  • The Electron Beam Scanlaser: Theoretical and Operational Studies

    Publication Year: 1967, Page(s):502 - 510
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (507 KB)

    This paper presents the theory, design, and initially observed operating parameters of the Electron Beam Scanlaser, a scanning laser device in which a modified electro-optic display tube selects one of many degenerate transverse modes of a flat-field conjugate resonator. The version considered uses a KDP crystal in the mode selector and an ionized mercury hollow cathode discharge as active element... View full abstract»

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  • Multiple-Curie-Point Capacitor Dielectrics

    Publication Year: 1967, Page(s):511 - 519
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (594 KB)

    This paper reports an experimental study of the preparation of screened printed dielectric materials having high dielectric constants and a controlled temperature characteristic. The technique uses mixtures of sintered bodies which have different Curie points and which retain their identity after processing. Barium-strontium and barium-lead titanate mixtures have been prepared having a dielectric ... View full abstract»

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  • Two Interconnection Techniques for Large-Scale Circuit Integration

    Publication Year: 1967, Page(s):520 - 526
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (520 KB)

    Studies of the feasibility of custom-interconnected, large-scale integrated circuits required the development of means for converting computer-generated wiring instructions into metallic conductors on a semiconductor wafer. The resulting equipment took two forms. In one, ultraviolet light serves to expose photoresists on a mechanically translated wafer; the other employs an electron beam. Both sys... View full abstract»

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  • Estimation of Temperature Rise in Electron Beam Heating of Thin Films

    Publication Year: 1967, Page(s):527 - 536
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (525 KB)

    Expressions are given for estimating the transient temperature distribution in a thin film heated by an electron beam. Graphical presentations in terms of dimensionless (reduced) variables are included to aid in specific calculations for designing an electron beam for use as a heating tool. View full abstract»

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  • A Numerical Integration Technique for Ordinary Differential Equations with Widely Separated Eigenvalues

    Publication Year: 1967, Page(s):537 - 543
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (422 KB)

    An explicit nonlinear numerical integration method is presented for the solution of certain large systems of ordinary differential equations in which there is a large spread of time constants, the smallest one being real. The integration formulas are derived and some local truncation error data given for small step sizes. Some applications are discussed where the new technique saves considerable c... View full abstract»

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  • Power Conversion in Nonlinear Resistive Elements Related to Interference Phenomena

    Publication Year: 1967, Page(s):544 - 552
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (487 KB)

    This paper derives the power conversion in a nonlinear resistive element that is in series with linear resistors. The derivation of the power conversion is analogous to the Manley and Rowe analysis. The power at the fundamental and intermodulation frequencies is defined as the product of the Fourier coefficients of the current and voltage components at these frequencies. In the analysis, the Fouri... View full abstract»

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  • On the Equation i = i0 [exp α (v − Ri) − 1]

    Publication Year: 1967, Page(s):553 - 554
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (253 KB)

    In general, the current-voltage characteristic of a nonlinear resistive element can be represented by an exponential function: i = i0(eαe − 1), where i is the current through the nonlinear resistor, e is the voltage across the resistor, and i0 and α are constants. In a circuit containing a linear resistor R in series with the nonlinear resistor... View full abstract»

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  • Domain Wall Energy Measurements using Narrow Permalloy Strips

    Publication Year: 1967, Page(s):555 - 557
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (293 KB)

    Middelhoek1 proposed in 1961 that the domain structure of narrow thin film strips could be used to measure energies of domain walls and Kuwahara et al. have likewise suggested this method.2 When measurements were attempted by these authors it was found that experimental results of wall energy were about a factor of four lower than calculated values. Furthermore, and contrary ... View full abstract»

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  • Propagation of Signals in Nonlinear Transmission Lines

    Publication Year: 1967, Page(s):558 - 562
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    This communication reports the results of a theoretical investigation of the propagation of signals in transmission lines whose nonlinear parameters are distributed capacitance and conductance. Such lines have their physical counterpart in lossless transmission lines that are loaded with closely spaced transistor bases or junction diodes, and in waveguides filled with certain ferroelectric ceramic... View full abstract»

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  • On the Magnetic Properties of Sputtered NiFe Films

    Publication Year: 1967, Page(s):563 - 569
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (482 KB)

    Reproducibility and control of magnetic properties have been significant problems in the preparation of Permalloy films by cathodic sputtering. The data presented in this paper illustrate the reduced sensitivity to gaseous impurities that can be achieved by applying a suitable negative bias to an 81% Ni-19% Fe Permalloy film that is being deposited by dc sputtering. Results are shown which compare... View full abstract»

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  • Technical Papers by IBM Authors Published Recently in Other Journal

    Publication Year: 1967, Page(s):570 - 578
    IEEE is not the copyright holder of this material | PDF file iconPDF (701 KB)
    Freely Available from IEEE
  • Patents Recently Issued to IBM Inventors

    Publication Year: 1967, Page(s):579 - 580
    IEEE is not the copyright holder of this material | PDF file iconPDF (262 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1967, Page(s):581 - 582
    IEEE is not the copyright holder of this material | PDF file iconPDF (303 KB)
    Freely Available from IEEE
  • Contents of previous issue

    Publication Year: 1967, Page(s): 583
    IEEE is not the copyright holder of this material | PDF file iconPDF (171 KB)
    Freely Available from IEEE

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The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

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Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center