Ukutyeba kobhedu kunye nenkqubo yokuphosa i-4L PCB

Ungakhetha njani ubungqingqwa bobhedu obungaphakathi kwebhodi kunye nefoyile yobhedu yokuphosa inkqubo ye-4-layer PCB

Xa uyila kunye nokuvelisa iibhodi zesekethe eziprintiweyo (PCBs), kukho izinto ezininzi ekufuneka ziqwalaselwe. Umba ophambili kukukhetha ubungqingqwa bobhedu obungaphakathi kwebhodi kunye nenkqubo yobhedu yefoyile yobhedu, ngakumbi xa ujongana ne-4-layer PCBs. Kule post yebhlog, sizakuxoxa ukuba kutheni olu khetho lubalulekile kwaye sikunika iingcebiso malunga nokwenza esona sigqibo silungileyo.

Ukubaluleka kobunzima bobhedu ebhodini

Ukutyeba kobhedu kwe-PCB ngaphakathi kwebhodi kudlala indima ebalulekileyo ekusebenzeni kwayo ngokubanzi kunye nokuthembeka. Ichaphazela ngokuthe ngqo amandla ebhodi ukuqhuba ngokufanelekileyo umbane kunye nokulawula ukutshatyalaliswa kobushushu. Ukukhetha ubukhulu bobhedu obuchanekileyo kubalulekile ekuqinisekiseni ukuba i-PCB inokusingatha umsinga ofunekayo ngaphandle kokufudumeza okugqithisileyo okanye ukuhla kwamandla ombane.

Xa 4-umaleko PCBs inxaxheba, imeko iba nzima ngakumbi. Iileya ezongezelelweyo kwi-PCB zandisa ukuntsokotha koyilo, kwaye ubukhulu bobhedu bufuna ukuqwalaselwa ngononophelo ukugcina ukusebenza kakuhle. Kodwa kufuneka kukhunjulwe ukuba ubukhulu kufuneka bukhethwe ngokweemfuno ezithile zePCB kunokulandela ngokumfamekileyo nayiphi na inkcazo yoshishino.

Izinto ekufuneka ziqwalaselwe xa ukhetha ukutyeba kobhedu ngaphakathi kwibhodi

1. Umthamo wangoku wokuthwala:Enye yeengqwalasela eziphambili xa ukhetha ubukhulu bobhedu ngumthamo wangoku wokuthwala umkhondo. Uyilo lwesekethe olunamalungu aphezulu okanye usetyenziso olufuna ukusebenza ngokuphezulu kufuneka lusebenzise imikhondo yobhedu engqindilili ukunqanda ukutshabalalisa ubushushu obugqithisileyo.

2. Ulawulo lobushushu:Ukutshatyalaliswa kobushushu okusebenzayo kubalulekile kubomi be-PCB kunye nokuthembeka. Iileya zobhedu ezishinyeneyo zinceda ukomeleza ukuchithwa kobushushu ngokubonelela ngomphezulu wendawo omkhulu wokudluliselwa kobushushu. Ke ngoko, ukuba isicelo sakho sibandakanya amacandelo avelisa ubushushu obuninzi, kuyacetyiswa ukuba ukhethe umaleko wobhedu otyebileyo.

3. Ulawulo lokuphazamiseka:Kwiinkqubo ezithile, ezinje ngefrikhwensi ephezulu okanye iisekethe zamaza kanomathotholo, ukugcinwa kweimedance echanekileyo kubalulekile. Kule meko, ubukhulu bebhodi ebhodini kufuneka bukhethwe ngokucophelela ukugcina ixabiso elifunekayo le-impedance. Iileya ezityebileyo zobhedu zinceda ukufikelela kulawulo olululo lwe-impedance.

Ukukhetha ifoyile yobhedu ekunene inkqubo yokuphosa

Ukongeza ukutyeba kobhedu, ifoyile yobhedu kufa inkqubo yokugalela ngomnye umba obalulekileyo ekufuneka uyiqwalasele. Inkqubo yokuphosa i-die-casting imisela umgangatho kunye nokufana komgangatho wobhedu kwi-PCB. Nazi ezinye izinto ekufuneka uzigcine engqondweni xa ukhetha inkqubo efanelekileyo yokuphosa ukufa:

1. Ukugqitywa komphezulu:Inkqubo yokulahla i-die-casting kufuneka iqinisekise ukugqitywa komphezulu ogudileyo kunye nofanayo. Oku kubaluleke kakhulu ukuqinisekisa ukuba i-solderability efanelekileyo kunye noqhagamshelwano oluthembekileyo lombane. Ukugqitywa komgangatho ombi kunokubangela iingxaki ezifana nokungaphumeleli kokubambisana kwe-solder okanye ukungahambi kakuhle.

2. Ukuncamathela:Umaleko wobhedu kufuneka uncanyathiselwe ngokuqinileyo kwi-PCB substrate ukuthintela i-delamination okanye ukuwa ngexesha lokusebenza. Inkqubo yokufa kufuneka iqinisekise ukubambelela kakuhle phakathi kobhedu kunye ne-substrate material (ngokuqhelekileyo i-FR-4) ukuqinisekisa ukuthembeka kunye nokuphila ixesha elide kwe-PCB.

3. Ukungqinelana:Ukuhambelana kobunzima bobhedu kuyo yonke i-PCB ibalulekile ekuqinisekiseni ukusebenza kombane okungaguqukiyo kunye nolawulo lokuthintela. Inkqubo yokufa kufuneka inike iziphumo ezihambelanayo kunye nokunciphisa ukuhluka kobunzima bobhedu.

Fumana ibhalansi efanelekileyo

Ukubetha ibhalansi echanekileyo phakathi kokusebenza, ukuthembeka kunye neendleko kubalulekile xa ukhetha ubungqingqwa bobhedu obungaphakathi kwibhodi kunye nenkqubo yobhedu yefoyile yobhedu. Iileya zobhedu ezishinyeneyo kunye neenkqubo eziqhubela phambili zokuphosa ukufa kunokuphucula ukusebenza, kodwa zinyuse iindleko zokwenziwa. Kuyacetyiswa ukuba udibane nomenzi we-PCB onamava okanye ingcaphephe ukuze uqikelele elona ngqindilili lobhedu kunye nenkqubo yokuphosa eyakufanelana neemfuno zakho ezithile kunye nemiqobo yohlahlo lwabiwo-mali.

ukuququmbela

Ukukhetha i-in-board echanekileyo yobhedu ubukhulu kunye ne-foil yobhedu ye-die-casting inkqubo ibalulekile ekuqinisekiseni ukusebenza kwexesha elide, ukuthembeka kunye nokusebenza kwe-PCB ye-4-layer. Ukuqwalaselwa ngokucophelela kwezinto ezifana nomthamo okhoyo ngoku, ulawulo lwe-thermal, kunye nokulawulwa kwe-impedance kubalulekile ekwenzeni ukhetho olufanelekileyo. Ukongeza, ukukhetha inkqubo yokuphosa ebonelela ngokugqitywa komphezulu ogudileyo, ukunamathela okugqwesileyo, kunye neziphumo ezingaguqukiyo ziya kuphucula ngakumbi umgangatho wePCB. Khumbula, lonke uyilo lwePCB lohlukile kwaye ukufumana ulungelelwaniso olugqibeleleyo phakathi kweemfuno zobugcisa kunye nokwenzeka kokwenziwa kwemveliso sisitshixo sempumelelo.