{"id":337610,"date":"2017-06-28T08:16:59","date_gmt":"2017-06-28T12:16:59","guid":{"rendered":"https:\/\/ntrs.nasa.gov\/search.jsp?R=20170005658"},"modified":"2017-06-28T08:16:59","modified_gmt":"2017-06-28T12:16:59","slug":"high-temperature-characteristics-of-pttasi2ptw-and-pttiw-diffusion-barrier-systems-for-ohmic-contacts-to-4h-sic","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=337610","title":{"rendered":"High Temperature Characteristics of Pt\/TaSi2\/Pt\/W and Pt\/Ti\/W Diffusion Barrier Systems for Ohmic Contacts to 4H-SiC"},"content":{"rendered":"<p>Abstract: The degradation of ohmic contacts to 4H-SiC pressure sensors over time at high temperature is primarily due to two failure mechanisms: migrating bond pad Au and atmospheric O toward the ohmic contact SiC interface and the inter-metallic mixing between diffusion barrier systems (DBS) and the underlying ohmic contact metallization. We investigated the effectiveness of Pt\/TaSi2\/Pt\/W (DBS-A) and Pt\/Ti\/W (DBS-B) in preventing Au and O diffusion through the underlying binary Ti\/W or alloyed W50:Ni5&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Abstract: The degradation of ohmic contacts to 4H-SiC pressure sensors over time at high temperature is primarily due to two failure mechanisms: migrating bond pad Au and atmospheric O toward the ohmic contact SiC interface and the inter-metallic mixin&#8230;<\/p>\n","protected":false},"author":60,"featured_media":615444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-337610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/337610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/60"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=337610"}],"version-history":[{"count":1,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/337610\/revisions"}],"predecessor-version":[{"id":337611,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/337610\/revisions\/337611"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/615444"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=337610"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=337610"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=337610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}