Alumina je zadani kerami\u010dki supstrat s razlogom. Jeftina je, \u010dvrsta i laka za metalizaciju. Tako\u0111er je lo\u0161a toplinska cijev. Plo\u010dica 96% Al\u2082O\u2083 ima vrijednost otprilike 20\u201330 W\/m\u00b7K. Nitrid aluminija, ako je pravilno izra\u0111en, kre\u0107e se u rasponu od 170\u2013200 W\/m\u00b7K, ponekad i malo iznad 200. Teorija za savr\u0161eni jednokristal iznosi blizu 320. Nitko to ne isporu\u010duje. Ono \u0161to mi isporu\u010dujemo je sinterirani izolator koji mo\u017ee odvesti toplinu iz \u010dipa u snage modulu, a da pritom ne postane provodnik.<\/p>\n
Ta kombinacija je rje\u0161enje. Metali provode toplinu i struju. Ve\u0107ina keramika blokira struju i zadr\u017eava toplinu. Nitrid aluminija istovremeno provodi toplinu i izoluje, sa koeficijentom toplinskog \u0161irenja od oko 4,5 ppm\/\u00b0C \u2014 blizu silicija. Aluminija se \u0161iri vi\u0161e, oko 6,5\u20137,5. Na visokosilnom IGBT-u ili SiC ure\u0111aju ta neuskla\u0111enost se o\u010dituje kao zamor lemljenja i lju\u0161tenje bakarne folije. BeO provodi jo\u0161 bolje i i dalje ga izbjegavamo kad god mo\u017eemo. Toksi\u010dnost nije fusnota u tehni\u010dkim podacima.<\/p>\n
Kisik je ne\u010disto\u0107a koja kvari pri\u010du o provodnosti. Kisik u kristalnoj re\u0161etki stvara prazna mjesta aluminija. Fononi se raspr\u0161uju. Pra\u0161ak s nekoliko posto kisika sintera se u ne\u0161to \u0161to izgleda kao AlN i mjeri bli\u017ee 100 W\/m\u00b7K. Pra\u0161ak s niskim udjelom kisika i dodatak za sinteriranje koji vu\u010de kisik u fazu na granici zrna \u2014 obi\u010dno jtrija \u2014 to je na\u010din da se dobije klasa s vi\u0161e od 170. Gusto\u0107a mora biti visoka. Preostala pora je jo\u0161 jedno mjesto raspr\u0161ivanja. Dakle, \u201cAlN podloga\u201d na PO nije klasa. Zatra\u017eite toplotnu provodnost, a ne samo hemiju.<\/p>\n
Rukovanje prahom je ono \u0161to radionice iznena\u0111uje. Sitni AlN se hidrolizira. Ostavite ga na vla\u017enom zraku i stvorit \u0107ete hidroksidni sloj te pove\u0107ati kisik koji ste upravo platili da uklonite. Suho skladi\u0161tenje, kratko vrijeme otvaranja, ponekad povr\u0161inski tretman. To nije hirovitost. To je na\u010din na koji k-vrijednost pre\u017eivi do pe\u0107i.<\/p>\n
Koristimo aluminij-nitrid tamo gdje termalni sloj zaista treba: DBC i DPC napojne plo\u010de, RF pakovanja, podloge za lasere i LED diode, neke dijelove poluprovodni\u010dkih procesa. Ako je \u010dip nekoliko vata i hladnjak je usko grlo, alumina i dalje pobje\u0111uje po cijeni. Ako kroz tanku keramiku u bakar provodite desetine vata, pad napona na aluminiumu vi\u0161e nije besplatan. Keramika ko\u0161ta vi\u0161e. Modul koji se ne gu\u0161i niti se delaminira je povrat.<\/p>\n
Obrada i metalizacija zahtijevaju istu ozbiljnost. AlN nije tako neformalan kao 96% alumina. Rubovi se \u010dipiraju. Bakreno lemljenje mora odgovarati koeficijentu \u0161irenja. Prelijepi disk od 180 W\/m\u00b7K s lo\u0161im interfejsom je samo skup izolator. Navedite k, debljinu, povr\u0161inu i metalni sistem zajedno. Nitrid aluminija je toplotni put koji je slu\u010dajno keramika. Tretirajte ga tako i zaslu\u017eit \u0107e premiju. Tretirajte ga kao bijelu aluminu s boljim katalogom i ne\u0107e je zaslu\u017eiti.<\/p>","protected":false},"excerpt":{"rendered":"
Aluminium Nitride Moves Heat Like a Metal and Still Blocks Current Alumina is the default ceramic substrate for a reason. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2],"tags":[],"class_list":["post-74","post","type-post","status-publish","format-standard","hentry","category-products-related"],"_links":{"self":[{"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/posts\/74","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/comments?post=74"}],"version-history":[{"count":1,"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/posts\/74\/revisions"}],"predecessor-version":[{"id":77,"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/posts\/74\/revisions\/77"}],"wp:attachment":[{"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/media?parent=74"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/categories?post=74"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminiumnitride.com\/bs\/wp-json\/wp\/v2\/tags?post=74"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}