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IBM Journal of Research and Development

Issue 3 • Date May 1967

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Displaying Results 1 - 11 of 11
  • On the Mathematical Theory of the Linearly-Graded P-N Junction

    Publication Year: 1967, Page(s):252 - 270
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (947 KB)

    This paper presents a numerical analysis of the mechanisms of operation within a linearly-graded p-n junction. Considered in this analysis are three important modes of junction operation: equilibrium, forward bias, and reverse bias in the collector junction. In addition, calculations of electrical space-charge layer capacitance are presented for the forward-biased linearly-graded junction. The con... View full abstract»

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  • Precipitation of Phosphorus, Arsenic, and Boron in Thin Silicon Foils

    Publication Year: 1967, Page(s):271 - 283
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1001 KB)

    Diffusion of high concentrations of P, B, and As in thin foils of silicon of (111), (110), and (100) orientations is shown to result in extensive precipitation. Observation of the precipitates through a transmission electron microscope has indicated that phosphorus diffusion gives rise to precipitate platelets. Boron precipitates were found to be of various shapes—rod, platelet, and three-d... View full abstract»

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  • On the Velocity of a Domain Wall in an Applied Magnetic Field

    Publication Year: 1967, Page(s):284 - 290
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (461 KB)

    A numerical study is made of a moving magnetic domain wall. It is assumed that the wall moves with a uniform velocity V under the influence of an applied magnetic field of magnitude H0. This leads to a boundary value problem on a doubly infinite line. By using a symmetry in the problem, the inherent difficulty of a two-dimensional search on a doubly infinite line is bypassed. For each V... View full abstract»

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  • Characteristics of the Chain Magnetic Film Storage Element

    Publication Year: 1967, Page(s):291 - 301
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (723 KB)

    This paper reports results of a detailed performance evaluation of the chain magnetic film storage element. The chains are made from copper strips which have been plated with a Ni-Fe film and are used to carry word current. The bit/sense signals are carried in wires which pass through the holes in the “links” of the chain. The memory element thus formed will operate in a rotational s... View full abstract»

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  • Design Considerations for the Chain Magnetic Storage Array

    Publication Year: 1967, Page(s):302 - 311
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (696 KB)

    A computer storage design using the chain store device as both a DRO and an NDRO storage element is discussed for an array organization of one megabit capacity and 500-nsec cycle time. The bit/sense system and schemes for minimizing the longitudinal fields inside the array during the “write” portion of the cycle are presented. Noise due to difference in the information states of the ... View full abstract»

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  • A Computer Model for Global Study of the General Circulation of the Atmosphere

    Publication Year: 1967, Page(s):312 - 336
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1082 KB)

    A mathematical model is developed for global prediction of large-scale movements and mean properties of the atmosphere from simulated initial weather conditions. A novel feature is the development of the formulation—one of considerably greater complexity than those for previous weather models adapted to machine calculation—in a concise tensor form. The organization of the computation... View full abstract»

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  • A New Current Instability in N-type Germanium

    Publication Year: 1967, Page(s):337 - 340
    Cited by:  Papers (11)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (333 KB)

    This paper reports the observation of a new oscillatory phenomenon in n-type Ge at 77°K. The effect is a coherent oscillatory component of the current through a bar of n-type Ge with ohmic n+ contacts initiated when the average electric field in the sample exceeds some threshold value which is in the region where the electron drift velocity is nearly saturated. The frequencies of... View full abstract»

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  • Technical Papers by IBM Authors Published Recently in Other Journals

    Publication Year: 1967, Page(s):341 - 354
    IEEE is not the copyright holder of this material | PDF file iconPDF (968 KB)
    Freely Available from IEEE
  • Patents Recently Issued to IBM Inventors

    Publication Year: 1967, Page(s):355 - 356
    IEEE is not the copyright holder of this material | PDF file iconPDF (262 KB)
    Freely Available from IEEE
  • Authors

    Publication Year: 1967, Page(s):357 - 358
    IEEE is not the copyright holder of this material | PDF file iconPDF (269 KB)
    Freely Available from IEEE
  • Contents of previous issue

    Publication Year: 1967, Page(s): 359
    IEEE is not the copyright holder of this material | PDF file iconPDF (220 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