Accession Number:

ADA250101

Title:

Field-Emitter Arrays for RF Vacuum Microelectronics

Descriptive Note:

Quarterly technical rept. no. 1, 1 Oct-31 Dec 1991,

Corporate Author:

SRI INTERNATIONAL MENLO PARK CA

Personal Author(s):

Report Date:

1992-02-01

Pagination or Media Count:

27.0

Abstract:

This report covers the first quarter of a program to develop field-emitter arrays for vacuum micro-electronics. The goals of the effort are 5 mA total current at 5 Acm2 for at least 1 h, and demonstrated modulation of the emission at 1 GHz. Efforts for this period have been directed toward developing a suitable anode structure for this application, designing a low-capacitance cathode structure capable of being driven at GHz frequencies, and designing test apparatus for operation of the cathodes in the GHz range microstrip lines, etc.. The results of the development to date are that 1000-tip cathodes have been operated with carefully processed, close-spaced nickel anodes at 15 mA and 23 Acm2 for over 1000 h. In addition, low-capacitance cathode structures have been fabricated, and although there have been some difficulties with dielectric depositions, one cathode has been tested with very encouraging results. A low- capacitance 625-tip linear array with a 4-um x 1.25-mm, electrode area has been tested at up to 25 mA total current at 1000 AcM2 with a 5 duty cycle and modulated at 20 MHz the limit of the function generator available at the time of the experiment. Field-emitter array, vacuum microelectronics, low- capacitance cathode.

Subject Categories:

  • Electrical and Electronic Equipment
  • Electricity and Magnetism
  • Fluid Mechanics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE