By Topic

IBM Journal of Research and Development

Issue 1 • Date Jan. 1972

Filter Results

Displaying Results 1 - 13 of 13
  • Silicon Process Technology for Monolithic Memory

    Publication Year: 1972 , Page(s): 2 - 10
    Cited by:  Patents (6)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (858 KB)  

    The successful design and production of high density, high speed monolithic memory circuits that can operate efficiently over wide current ranges can be directly attributed to the development of a new silicon process technology based on the (100) crystal orientation. To provide optimum capability to fabricate these circuits with high yields, process modifications to accommodate larger starting sub... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design Innovations of the IBM 3830 and 2835 Storage Control Units

    Publication Year: 1972 , Page(s): 11 - 18
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (677 KB)  

    The IBM 2305 Fixed Head Storage and IBM 3330 Disk Storage provide significant performance improvements over previously available disk facilities. Many of the improvements were made possible by the design of the control units, which are complex systems that integrate analog and digital interfaces. Definition of control unit requirements and characteristics permitted a large degree of commonality to... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Readout Performance Analysis of a Cryogenic Magneto-optical Data Storage System

    Publication Year: 1972 , Page(s): 19 - 26
    Cited by:  Papers (6)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (582 KB)  

    An analysis of readout signal and noise generation is presented for a magneto-optical data storage system which uses a single laser beam for both Curie-point thermal writing and Faraday readout of magneto-optical films. The analysis is applied to a cryogenic beam addressable file model which utilizes GaAs injection lasers and doped EuO film. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theories of the Distribution of Deposit from Sputtered Disk and Rectangular Electrodes

    Publication Year: 1972 , Page(s): 27 - 34
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (673 KB)  

    Theoretical expressions for the distribution of deposits sputtered from disk-shaped and rectangular electrodes are derived for cases of 1) uniform emission obeying the cosine emission law, 2) distorted “under cosine” and “over cosine” emission, 3) additional emission confined to the peripheries of the electrodes and obeying the cosine emission law, and 4) distorted ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Cross-coupled Thyristor Storage Cell

    Publication Year: 1972 , Page(s): 35 - 44
    Cited by:  Papers (7)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (753 KB)  

    A symmetrical, cross-coupled, two-thyristor storage cell with 1 µW stand-by power dissipation and 60 nsec switching time is described. When integrated in silicon planar technology each thyristor consists of a vertical npn transistor and a lateral pnp transistor. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient Evaluation of Array Subscripts of Arrays

    Publication Year: 1972 , Page(s): 45 - 57
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (963 KB)  

    The APL language allows subscripted expressions such as A[I;J;K], where A is an array and I, J and K may be scalars, vectors or arrays of any size and shape. We describe an efficient method of evaluating these expressions. The method is quite general and yet it does recognize all the special cases in which multiple subscripts can be reduced to a simpler form. We show how the same mechanism can be ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experiments on Page Size, Program Access Patterns, and Virtual Memory Performance

    Publication Year: 1972 , Page(s): 58 - 66
    Cited by:  Papers (6)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (759 KB)  

    The assumption about virtual memory systems that as overhead (time for access and software page management) decreases page size should be reduced is not always a good one. Recent experiments indicate that larger page sizes can provide better performance for programs that make highly localized use of memory space. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sputter-etching of Heterogeneous Surfaces

    Publication Year: 1972 , Page(s): 67 - 70
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (420 KB)  

    In conventional sputter etching, heterogeneous surfaces are eroded at generally unpredictable rates. The reasons for this are discussed and a solution to the problem is given: Based on control of redeposition, the technique involves the use of a device called a “catcher,” which is placed near the target of the sputtering chamber to trap re-emitted particles. Experiments are described... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ge Epitaxial Refill Deposition Techniques for Fabricating Pedestal Transistor Structures

    Publication Year: 1972 , Page(s): 71 - 75
    Cited by:  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (477 KB)  

    An etch-epitaxial refill technique is described for the fabrication of integrated high-speed Ge transistor structures having a pedestal configuration. The device areas surrounding 0.1 ohm-cm mesa structures were refilled with Ge having a resistivity range of 1 to 10 ohm-cm, providing low parasitic capacitance in the passive area of the base-collector junction. Processes and techniques were develop... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Recent Papers by IBM Authors

    Publication Year: 1972 , Page(s): 76 - 81
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (599 KB)  

    Reprints of the papers listed here may usually be obtained most eficiently be writing directly to the authors. The authors' IBM divisions and locations are identified as follows: ASDD is the Advanced Systems Development Division; CD, Components Division; DPD, Data Processing Division; FED, Field Engineering Division; FSD, Federal Systems Division; GSD, General Systems Division; RES, Research Divis... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Patents Recently Issued to IBM Inventors

    Publication Year: 1972 , Page(s): 82 - 84
    Save to Project icon | PDF file iconPDF (365 KB)  
    Freely Available from IEEE
  • Authors

    Publication Year: 1972 , Page(s): 85 - 87
    Save to Project icon | PDF file iconPDF (464 KB)  
    Freely Available from IEEE
  • Contents of previous two issues

    Publication Year: 1972 , Page(s): 88 - 89
    Save to Project icon | PDF file iconPDF (244 KB)  
    Freely Available from IEEE

Aims & Scope

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.

Full Aims & Scope

Meet Our Editors

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