Ƙarƙashin aluminum ɗin laminate ne na ƙarfe na ƙarfe tare da kyakkyawan aikin watsar da zafi. Yana da wani farantin-kamar abu, Ya sanya daga lantarki gilashin fiber zane ko wasu ƙarfafa kayan impregnated da guduro, guda guduro, da dai sauransu a matsayin insulating m Layer, an rufe shi da jan karfe tsare a daya ko duka biyu da kuma zafi guga man, ake magana a kai a matsayin aluminum- tushen farantin karfe . Kangxin Circuit gabatar da aikin aluminum substrate da surface jiyya na kayan.
Aluminum substrate aiki
1.Excellent zafi dissipation yi
Aluminum-tushen faranti na jan karfe suna da kyakkyawan aikin watsar da zafi, wanda shine mafi kyawun fasalin wannan nau'in farantin. PCB da aka yi da ita ba kawai zai iya hana yanayin zafin aiki na abubuwan da aka ɗora da shi daga haɓaka ba, amma kuma da sauri zafi da aka haifar ta hanyar abubuwan haɓaka ƙarfin lantarki, manyan abubuwan haɗin wutar lantarki, manyan na'urorin wutar lantarki da sauran abubuwan haɗin gwiwa. Hakanan ana rarraba shi saboda ƙananan ƙarancinsa, nauyi mai sauƙi (2.7g/cm3), anti-oxidation, da farashi mai rahusa, don haka ya zama mafi girma kuma mafi girman adadin kayan haɗin gwal a cikin laminates na ƙarfe na ƙarfe. A cikakken thermal juriya na insulated aluminum substrate ne 1.10 ℃ / W da thermal juriya ne 2.8 ℃ / W, wanda ƙwarai inganta fusing halin yanzu na jan karfe waya.
2. Inganta inganci da ingancin machining
Laminates da aka yi da jan ƙarfe na aluminum suna da ƙarfin injina da ƙarfi, wanda ya fi kyau fiye da madaidaitan laminate na jan ƙarfe da yumbura. Zai iya gane ƙera manyan allunan bugu a kan ƙananan ƙarfe, kuma ya dace musamman don hawan abubuwa masu nauyi akan irin waɗannan abubuwan. Bugu da kari, da aluminum substrate kuma yana da kyau flatness, kuma shi za a iya harhada da sarrafa a kan substrate ta guduma, riveting, da dai sauransu. ko lankwasa da karkatarwa tare da wadanda ba waya rabo a kan PCB yi da shi, yayin da gargajiya resin- tushen laminate na jan karfe ba zai iya ba.
3.Babban kwanciyar hankali
Ga laminate daban-daban na tagulla, akwai matsala ta haɓakawar thermal (kwanciyar hankali), musamman haɓakar thermal a cikin kauri shugabanci (Z-axis) na allo, wanda ke shafar ingancin ramukan ƙarfe da wayoyi. Babban dalilin shi ne cewa linzamin fadada coefficients na faranti daban-daban, kamar jan karfe, da kuma linzamin fadada coefficient na epoxy gilashin fiber zane substrate ne 3. The mikakke fadada na biyu ne sosai daban-daban, wanda shi ne mai sauki sa Bambance-bambance a cikin haɓakar zafin jiki na substrate, yana haifar da da'irar jan ƙarfe da rami mai ƙarfe ya karye ko ya lalace. Matsakaicin faɗaɗa madaidaiciyar ƙirar aluminium yana tsakanin, ya fi ƙanƙanta fiye da na gabaɗaya resin substrate, kuma yana kusa da madaidaicin madaidaicin madaidaicin jan ƙarfe, wanda ke dacewa don tabbatar da inganci da amincin da'ira da aka buga.
Surface jiyya na aluminum substrate abu
1. Depoiling
An rufe saman farantin karfen aluminum tare da man fetur yayin sarrafawa da sufuri, kuma dole ne a tsaftace shi kafin amfani. Ka'idar ita ce a yi amfani da man fetur (batun jirgin sama na janar) a matsayin mai narkewa, wanda za'a iya narkar da shi, sannan a yi amfani da kayan tsaftace ruwa mai narkewa don cire tabo mai. Kurkure saman tare da ruwan gudu don sanya shi tsabta kuma ba tare da digon ruwa ba.
2. Girman kai
Aluminium substrate bayan jiyya na sama har yanzu yana da maiko wanda ba a cirewa a saman ba. Don cire shi gaba daya, sai a jika shi da alkali sodium hydroxide mai karfi a 50 ° C na minti 5, sannan a kurkura da ruwa mai tsabta.
3. Alkalin etching. Fuskar farantin aluminum a matsayin kayan tushe ya kamata ya kasance da ƙayyadaddun ƙazanta. Tun da ma'auni na aluminum da aluminum oxide film Layer a kan farfajiyar duka kayan amphoteric ne, za a iya yin roughened surface na aluminum tushe abu ta yin amfani da acidic, alkaline ko composite alkaline bayani tsarin. Bugu da ƙari, ana buƙatar ƙara wasu abubuwa da ƙari ga roughening bayani don cimma dalilai masu zuwa.
4. Chemical polishing (dipping). Saboda kayan tushe na aluminum ya ƙunshi wasu ƙananan ƙarfe na ƙazanta, yana da sauƙi don samar da mahaɗan inorganic waɗanda ke manne da farfajiyar ƙasa yayin aiwatar da roughening, don haka ya kamata a bincika mahaɗan inorganic da aka kafa akan saman. Dangane da sakamakon bincike, shirya maganin dipping mai dacewa, da kuma sanya madaidaicin aluminum substrate a cikin maganin dipping don tabbatar da wani lokaci, don haka saman farantin aluminum ya kasance mai tsabta da haske.