1. Me yasa ake amfani da allunan kewayen yumbu
Talakawa PCB yawanci Ya sanya daga jan karfe tsare da substrate bonding, da substrate abu ne mafi yawa gilashin fiber (FR-4), phenolic guduro (FR-3) da sauran kayan, m ne yawanci phenolic, epoxy, da dai sauransu A cikin aiwatar da PCB aiki saboda thermal danniya, sinadaran dalilai, rashin dace samar tsari da kuma wasu dalilai, ko a cikin zane tsari saboda biyu ɓangarorin jan karfe asymmetry, yana da sauki kai ga daban-daban digiri na warping PCB jirgin.
PCB Twist
Kuma wani PCB substrate – yumbu substrate, saboda zafi dissipation yi, halin yanzu dauke iya aiki, rufi, thermal fadada coefficient, da dai sauransu, sun fi talakawa gilashin fiber PCB jirgin, don haka shi ne yadu amfani a high-ikon lantarki kayayyaki kayayyaki. , sararin samaniya, kayan lantarki na soja da sauran kayayyaki.
Abubuwan yumbura
Tare da talakawa PCB ta amfani da m jan karfe tsare da substrate bonding, yumbu PCB ne a high zafin jiki yanayi, ta hanyar bonding jan karfe tsare da yumbu substrate yanki tare, karfi dauri da karfi, jan tsare ba zai fada kashe, high AMINCI, barga yi a high. zafin jiki, yanayin zafi mai girma
2. Babban abu na yumbu substrate
Alumina (Al2O3)
Alumina shine kayan da aka fi amfani dashi a cikin yumbu substrate, saboda a cikin injiniyoyi, thermal da kayan lantarki idan aka kwatanta da mafi yawan sauran yumbu oxide, ƙarfin ƙarfi da kwanciyar hankali na sinadarai, da wadataccen tushen albarkatun ƙasa, dacewa da masana'antar fasaha iri-iri da siffofi daban-daban. .Dangane da kaso na alumina (Al2O3) za a iya raba zuwa 75 ain, 96 ain, 99.5 ain.Abubuwan da ke cikin wutar lantarki na alumina kusan ba su da tasiri da abubuwan da ke cikin alumina daban-daban, amma kaddarorin injinsa da yanayin zafi suna canzawa sosai.Substrate tare da ƙarancin tsabta yana da ƙarin gilashi da girman girman ƙasa.Mafi girma da tsarki na substrate, mafi sauƙi, m, asarar matsakaici yana da ƙananan, amma farashin kuma ya fi girma.
Beryllium oxide (BeO)
Yana da mafi girman ƙarfin wutar lantarki fiye da aluminum na ƙarfe, kuma ana amfani dashi a cikin yanayi inda ake buƙatar ƙarfin wutar lantarki mai girma.Yana raguwa da sauri bayan zafin jiki ya wuce 300 ℃, amma ci gabansa yana iyakance ta hanyar guba.
Aluminum nitride (AlN)
Aluminum nitride tukwane tukwane tare da aluminum nitride foda a matsayin babban lokaci crystalline.Idan aka kwatanta da alumina yumbu substrate, rufi juriya, rufi jure mafi girma irin ƙarfin lantarki, ƙananan dielectric akai.Its thermal conductivity ne 7 ~ 10 sau fiye da na Al2O3, da kuma thermal fadada coefficient (CTE) ya kusan dace da silicon guntu, wanda yake da matukar muhimmanci ga high-power semiconductor kwakwalwan kwamfuta.A cikin tsarin samarwa, haɓakar thermal conductivity na AlN yana da matukar tasiri da abun ciki na ƙazanta na iskar oxygen da suka rage, kuma ana iya ƙara yawan zafin jiki ta hanyar rage yawan iskar oxygen.A halin yanzu, thermal conductivity na tsari
Dangane da dalilan da ke sama, ana iya sanin cewa yumbura na alumina suna kan gaba a cikin fagagen microelectronics, lantarki lantarki, gauraye microelectronics da na'urorin wutar lantarki saboda ingantaccen aikinsu.
Idan aka kwatanta da kasuwa na wannan size (100mm × 100mm × 1mm), daban-daban kayan yumbu substrate farashin: 96% alumina 9.5 yuan, 99% alumina 18 yuan, aluminum nitride 150 yuan, beryllium oxide 650 yuan, ana iya gani cewa. tazarar farashin tsakanin ma'auni daban-daban kuma yana da girma
3. Abũbuwan amfãni da rashin amfani na yumbu PCB
Amfani
- Large halin yanzu dauke iya aiki, 100A halin yanzu ci gaba ta hanyar 1mm 0.3mm lokacin farin ciki jan karfe jiki, zafin jiki Yunƙurin na game da 17 ℃
- Hawan zafin jiki shine kawai game da 5 ℃ lokacin da 100A halin yanzu ya ci gaba da wucewa ta jikin jan karfe 2mm 0.3mm.
- Ingantacciyar aikin watsar zafi, ƙarancin haɓaka haɓakar haɓakar thermal, tsayayyen siffa, ba sauƙin warping ba.
- Kyakkyawan rufi, babban ƙarfin ƙarfin lantarki, don tabbatar da lafiyar mutum da kayan aiki.
Rashin amfani
Rashin ƙarfi yana ɗaya daga cikin manyan ɓarna, wanda ke haifar da yin ƙananan allon kawai.
Farashin yana da tsada, buƙatun samfuran lantarki da ƙarin ƙa'idodi, allon kewayawa yumbu ko amfani da su a cikin wasu samfuran mafi girma, samfuran ƙananan ƙarancin ba za a yi amfani da su ba kwata-kwata.
4. Amfani da yumbu PCB
a.Babban ikon lantarki module, hasken rana panel module, da dai sauransu
- Babban mitar sauya wutar lantarki, m jihar gudun ba da sanda
- Kayan lantarki na motoci, sararin samaniya, kayan lantarki na soja
- Babban iko LED fitilu kayayyakin
- eriya sadarwa