Accession Number : ADA293045

Title :   High Performance YBCO Films.

Descriptive Note : R/D final rept. 25 Mar 91-31 Mar 95,

Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON NJ

Personal Author(s) : Denlinger, Edgar J.

PDF Url : ADA293045

Report Date : 31 MAR 1995

Pagination or Media Count : 16

Abstract : The major objectives of this four year program have been accomplished. A suitable low loss, low dielectric constant substrate for HTS circuitry has been identified and shown to permit the deposition of high quality YBCO films that are comparable to that achieved with lanthanum aluminate substrates. The substrate is magnesium fluoride which has a dielectric constant of 5.3 and a loss tangent of 0.0001 at 77K. The benefits of this technology are higher speed interconnects for Multi-Chip Module (MCM) assemblies applied to digital processing, higher power handling at microwave frequencies applied to multiplexers and other passive components, and lower frequency dispersion and lower loss at millimeter wave frequencies applied to antenna feed networks, T/R modules, and delay lines. We have developed a novel fabrication technique for MCM structures that features an ultra-thin YBCO-covered magnesium fluoride substrate glass bonded to a metal handle, which provides excellent mechanical support and good heat sinking characteristics. For a sample demonstration of this technology, an MCM structure with a YBCO signal plane that is suitable for microwave/millimeter wave circuitry was fabricated and tested to have excellent electrical characteristics with a YBCO film surface resistance of 1 mohm. jg p.3

Descriptors :   *CIRCUITS, *LANTHANUM, *YTTRIUM, FREQUENCY, HIGH POWER, DIGITAL SYSTEMS, METALS, MECHANICAL PROPERTIES, DISPERSING, NETWORKS, PROCESSING, DIELECTRICS, PASSIVE SYSTEMS, CHIPS(ELECTRONICS), FABRICATION, MILLIMETER WAVES, SUBSTRATES, MICROWAVE EQUIPMENT, ELECTRICAL PROPERTIES, DEPOSITION, LOW LOSS, OXIDES, COPPER, MODULES(ELECTRONICS), TANGENTS, MAGNESIUM COMPOUNDS, HEAT, HIGH TEMPERATURE SUPERCONDUCTORS, MULTIPLEXING, FLUORIDES, BARIUM, LOW FREQUENCY, MICROWAVE FREQUENCY, DELAY LINES, ANTENNA FEEDS, FEED MECHANISMS, ALUMINATES, SINKING.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Electrical and Electronic Equipment
      Electricity and Magnetism
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE