Accession Number:

ADA276493

Title:

High Performance YBCO Films

Descriptive Note:

Rept. for 1 Dec 1993-25 Feb 1994

Corporate Author:

DAVID SARNOFF RESEARCH CENTER PRINCETON NJ

Report Date:

1994-02-25

Pagination or Media Count:

10.0

Abstract:

A program plan for Phase III of the contract was submitted and approved. It incorporates a silver capping layer and a glassmetal handle for support of a thin YBCOmagnesium fluoride microstrip structure. The basic technology can be applied to MCMs as well as millimeter wave circuit needs. A silver capping layer of thickness 5 microns was found to be compatible with glass and able to withstand processing temperatures of 550 C used for firing and annealing of the glass. However, after subjecting the silverglass combination to 700 C to simulate the effect of depositing a subsequent YBCO signal layer in the complete MCM structure, there was some degradation in the silvers conductivity as measured using the dielectric resonator technique. A thicker silver layer is apparently needed to adjust for the interfacial reaction between the silver and the glass. Silver was deposited on both STO and YBCO-covered samples with excellent adhesion. After heating the samples to 750C in flowing nitrogen, the adhesion of the silver remained excellent when tested with scotch tape.

Subject Categories:

  • Inorganic Chemistry
  • Electrical and Electronic Equipment
  • Coatings, Colorants and Finishes
  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE