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Thin film compositionally stratified multi-layer heterostructure for temperature insensitive low dielectric loss and enhanced tunability OTM communications devices and methods for fabrication thereof

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CCDC ARL

A compositionally stratified multi-layer Ba1-xSrxTiO3 (BST) heterostructure material is described which includes a lower layer of crystallized Ba1-xSrxTiO3 perovskite oxide where x is in the range of 0.36-0.44, inclusive, deposited on a substrate; an intermediate layer of crystallized Ba1-xSrxTiO3 perovskite oxide where x is in the range of 0.23-0.27, inclusive, in contact with the lower layer; and an upper layer of crystallized Ba1-xSrxTiO3 perovskite oxide where x in the range of 0.08-0.13, inclusive, in contact with the intermediate layer. A phase shifter and/or preselector tunable device including a compositionally stratified multi-layer BST hererostructure material is described according to the present invention. Temperature sensitivity of an inventive phase shifter is reduced by at least 70% in the temperature interval of 20 to 90° C., inclusive, and by at least 14% in the temperature interval of −10 to 20° C., inclusive, compared to a compositionally homogeneous 60/40 BST material.

Inventors: 
Cole, Melanie Will
Patent Number: 
Technical domain: 
Materials and Coatings
FIle Date: 
2011-04-13
Grant Date: 
2012-07-10
Grant time: 
454 days
Grant time percentile rank: 
8
Claim count percentile rank: 
4
Citations percentile rank: 
2
'Cited by' percentile rank: 
1
Assignee: 
US ARMY