{"id":241,"date":"2018-03-14T06:24:47","date_gmt":"2018-03-14T06:24:47","guid":{"rendered":"http:\/\/www.shalomeo.com\/blog\/?p=241"},"modified":"2018-03-14T06:25:25","modified_gmt":"2018-03-14T06:25:25","slug":"lithium-aluminate-lialo2-crystals-and-substrates","status":"publish","type":"post","link":"https:\/\/www.shalomeo.com\/blog\/lithium-aluminate-lialo2-crystals-and-substrates\/241.html","title":{"rendered":"Lithium Aluminate (LiAlO2) Crystals and Substrates"},"content":{"rendered":"

Lithium\u00a0Aluminate\u00a0or\u00a0LiAlO2<\/a>\u00a0<\/strong>is\u00a0a\u00a0potential\u00a0substrate\u00a0for\u00a0III-V\u00a0nitride\u00a0thin\u00a0films\u00a0due\u00a0to\u00a0its\u00a0excellent\u00a0lattice\u00a0mismatch\u00a0to\u00a0GaN\u00a0(<0.2%\u00a0at\u00a0<100>\u00a0),\u00a0chemical\u00a0stability\u00a0at\u00a0high\u00a0temperature\u00a0and\u00a0cost\u00a0effective.\u00a0The\u00a0lattice\u00a0parameter\u00a0of\u00a0Lithium\u00a0Dioxogallate\u00a0(LiGaO2)\u00a0and\u00a0Lithium\u00a0Aluminium\u00a0Oxide\u00a0(\u03b3)\u00a0(LiAlO2)\u00a0crystal\u00a0can\u00a0match\u00a0with\u00a0the\u00a0Gallium\u00a0Nitride\u00a0film\u00a0very\u00a0well.\u00a0The\u00a0mismatch\u00a0coefficients\u00a0are\u00a00.2%\u00a0and\u00a01.4%\u00a0only\u00a0for\u00a0LiGaO2\u00a0and\u00a0LiAlO2,\u00a0much\u00a0smaller\u00a0than\u00a0that\u00a0of\u00a0the\u00a0common\u00a0used\u00a0substrates\u00a0such\u00a0as\u00a0<0001>\u00a0sapphire\u00a0(14%),\u00a0<100>\u00a0MgO\u00a0(3%),\u00a0<0001>\u00a0SiC\u00a0(3.5%).\u00a0The\u00a0Gallium\u00a0Nitride\u00a0film\u00a0is\u00a0a\u00a0very\u00a0important\u00a0material\u00a0for\u00a0blue,\u00a0violet,\u00a0UV\u00a0and\u00a0white\u00a0LED.\u00a0A\u00a0substrate\u00a0material\u00a0that\u00a0matches\u00a0the\u00a0film\u00a0to\u00a0be\u00a0grown\u00a0well\u00a0is\u00a0very\u00a0important\u00a0to\u00a0get\u00a0a\u00a0nice\u00a0GaN\u00a0epitaxial\u00a0film.<\/p>\n

\"\"<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Specifications\u00a0<\/b><\/td>\n<\/tr>\n
Orientations<\/td>\n<100>,\u00a0<110>,\u00a0<111><\/td>\n<\/tr>\n
Orientation\u00a0Tolerance<\/td>\n\u00b10.5\u00b0<\/td>\n<\/tr>\n
Standard\u00a0Size\u00a0(mm)<\/td>\n\u042430,\u042420,\u00a020×20,\u00a015×15,10×10,10×5,10x3mm<\/td>\n<\/tr>\n
Thickness<\/td>\n0.35\u00a0mm,\u00a00.5\u00a0mm\u00a0and\u00a01.0\u00a0mm<\/td>\n<\/tr>\n
Dimensional\u00a0Tolerance<\/td>\n\u00b10.1mm<\/td>\n<\/tr>\n
Grown\u00a0Boule<\/td>\n55\u00a0mm\u00a0dia.\u00a0x\u00a050-80\u00a0mm\u00a0length<\/td>\n<\/tr>\n
Surface\u00a0Quality<\/td>\n20\/10\u00a0S\/D<\/td>\n<\/tr>\n
Flatness<\/td>\n1\/4\u00a0Lambda\u00a0@633nm\u00a0for\u00a0thickness\u00a0less\u00a0than\u00a02mm<\/td>\n<\/tr>\n
Parallelism<\/td>\n30\u00a0arc\u00a0sec.<\/td>\n<\/tr>\n
Perpendicularity<\/td>\n5\u00a0arc\u00a0minutes<\/td>\n<\/tr>\n
Wavefront\u00a0Distortion<\/td>\n<1\/4\u00a0Lambda\u00a0@\u00a0633nm<\/td>\n<\/tr>\n
Micro\u00a0Roughness\u00a0(5\u03bcmx5\u03bcm\uff09<\/td>\nRa:<1\u00c5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Lithium\u00a0Aluminate\u00a0or\u00a0LiAlO2\u00a0is\u00a0a\u00a0potential\u00a0substra …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[65,60,67,66],"_links":{"self":[{"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/posts\/241"}],"collection":[{"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/comments?post=241"}],"version-history":[{"count":0,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/posts\/241\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/media?parent=241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/categories?post=241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shalomeo.com\/blog\/wp-json\/wp\/v2\/tags?post=241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}