Khetha izixhobo ezifanelekileyo kwiPCB ezininzi

Kule post yebhlog, siza kuxoxa ngengqwalasela eziphambili kunye nezikhokelo zokukhetha ezona mathiriyeli zibalaseleyo zePCB ezininzi.

Xa uyila kwaye uvelisa iibhodi zeesekethe ezininzi, enye yezona zinto zibalulekileyo ekufuneka ziqwalaselwe kukukhetha izixhobo ezifanelekileyo.Ukukhetha izinto ezifanelekileyo kwibhodi yesekethe ye-multilayer, kuquka i-substrate kunye ne-foil yobhedu, inokuchaphazela kakhulu ukusebenza kunye nokuthembeka kwemveliso yokugqibela.

Qonda indima ye-substrate

Izinto ezisisiseko sisiseko seebhodi zeesekethe ezininzi.Idlala indima ebalulekileyo ekuboneleleni ngenkxaso yomatshini, ukugquma kombane kunye nokutshatyalaliswa kobushushu ngaphakathi kwebhodi yesekethe.Ngoko ke, ukukhetha i-substrate efanelekileyo kubalulekile ekuqinisekiseni ukuthembeka okupheleleyo kunye nokusebenza kwebhodi yesekethe.

Xa ukhetha i-substrate yebhodi yesekethe ye-multilayer, kukho izinto ezininzi zokuqwalasela.Ii-substrates ezisetyenziswa ngokuqhelekileyo ziquka i-FR-4, i-polyimide kunye nezixhobo ze-ceramic.Isixhobo ngasinye sineempawu ezizodwa kunye neenzuzo ezihambelana neemfuno zebhodi yesekethe ezahlukeneyo.

1. FR-4:I-FR-4 yi-substrate esetyenziswa ngokubanzi eyaziwayo ngenxa yeempawu zayo zokugquma umbane kunye namandla omatshini.Iquka umaleko obhityileyo we-epoxy resin eyomeleziweyo ye-fiberglass.I-FR-4 ingabizi kakhulu, ifumaneka ngokulula, kwaye ifanelekile kwizicelo ezininzi.Nangona kunjalo, ngenxa ye-dielectric ephezulu engaguqukiyo kunye ne-tangent yelahleko, isenokungafaneleki kuyilo lwesekethe ye-high-frequency.

2. Polyimide:I-Polyimide ifanelekile kwizicelo ezifuna ukuguquguquka, ukuxhathisa ubushushu obuphezulu, kunye nokumelana neekhemikhali okugqwesileyo.Yimpahla ye-thermoplastic enokumelana neemeko zokusebenza ezinzima.Iibhodi zeesekethe zePolyimide ziqhele ukusetyenziswa kwi-aerospace, i-automotive kunye nemizi-mveliso yezonyango apho i-lightweight kunye ne-compact design ibaluleke kakhulu.

3. Imathiriyeli yeCeramic:Ukusetyenziswa okukhethekileyo okudinga ukuhanjiswa kwe-thermal ephezulu kunye nokufakelwa kombane okugqwesileyo, izinto ze-ceramic ezifana ne-aluminium nitride okanye i-aluminium oxide zikhetho lokuqala.Ezi zixhobo zineempawu ezibalaseleyo ze-thermal kwaye ziyakwazi ukuphatha ukusebenza kwamandla aphezulu.

Vavanya iiKhetho zeCopper Cladding

I-foil ye-Copper ene-copper isebenza njenge-conductive layer kwiibhodi zeesekethe ezininzi.Inika iindlela zombane kunye nokudibanisa phakathi kwamacandelo ahlukeneyo kunye neesekethe.Xa ukhetha i-foil yobhedu, kukho izinto ezimbini eziphambili ekufuneka ziqwalaselwe: ubukhulu be-foil kunye nohlobo lokunamathela.

1.Ubukhulu beFoil:I-foil ye-copper clad iza ngobukhulu obahlukeneyo, ngokuqhelekileyo ukusuka kwi-ounce ukuya kwi-ounces ezi-6.Ukutyeba kugqiba umthamo wangoku wokuthwala webhodi yesekethe.Ifoyile etyebileyo inokuphatha imithwalo yangoku ephezulu kodwa inokuthintelwa ekuphumezeni ububanzi bomkhondo obucolekileyo kunye nezithuba.Ngoko ke, kubalulekile ukuvavanya iimfuno zangoku zesekethe kwaye ukhethe ubukhulu be-foil obuya kuhlangabezana ngokufanelekileyo neemfuno zangoku.

2.Uhlobo lokuncamathelisa:I-copper efakwe i-foil ene-acrylic okanye i-epoxy adhesive.I-Acrylic adhesive foil ihambelana nokusingqongileyo, kulula ukuyiqhuba kwaye ingabizi.I-epoxy adhesive foils, kwelinye icala, inika uzinzo olungcono lwe-thermal, ukuxhathisa imichiza, kunye nokunamathela.Ukukhethwa kohlobo lokunamathela kuxhomekeke kwiimfuno ezithile zesicelo.

Lungiselela inkqubo yokukhetha izinto

Ukuze kuphuculwe inkqubo yokukhethwa kwezinto eziphathekayo kwiibhodi zeesekethe ezininzi, ezi zikhokelo zilandelayo mazithathelwe ingqalelo:

1. Misela iimfuno zesicelo:Kubalulekile ukuqonda indawo yokusebenza, amanqanaba obushushu, uxinzelelo koomatshini, kunye nezinye iimeko ezithe ngqo kwisicelo.Olu lwazi luya kukhokela ukukhethwa kwezinto ezinokumelana neemeko ezifunekayo.

2.Sebenza nababoneleli:Ukubonisana nomboneleli wezinto eziphathekayo onamava okanye umenzi wePCB unokunika ulwazi oluxabisekileyo ekukhetheni ezona mathiriyeli zifanelekileyo.Banokubonelela ngeengcebiso ngokusekelwe kubuchwephesha babo kunye nolwazi lwenkqubela phambili yamva nje kwizinto zebhodi yesekethe.

3. Vavanya ixabiso kunye nokufumaneka:Nangona ukusebenza kunye nokuthembeka kubalulekile, kubalulekile ngokulinganayo ukuqwalasela iindleko kunye nokufumaneka kwezinto ezikhethiweyo.Qinisekisa ukuba izinto ezikhethiweyo ziyonga imali kwaye zifumaneka lula ngokwemiyinge efunekayo.

Isishwankathelo

Ukukhetha izinto ezifanelekileyo kwiiPCB ezininzi linyathelo elibalulekileyo ekuqinisekiseni ukusebenza, ukuthembeka kunye nokusebenza kwemveliso yokugqibela.Ukuqonda indima ye-substrate kunye ne-copper cladding, ukuvavanya ukhetho olusekelwe kwiimfuno ezithile, kunye nokuphucula inkqubo yokukhetha kuya kunceda abaqulunqi kunye nabavelisi bafezekise iziphumo ezilungileyo.Ngokuqwalasela ezi zikhokelo, iinjineli zinokukhetha ngokuzithemba izinto ezichanekileyo kwiibhodi zeesekethe ezininzi, okukhokelela ekuyilweni kwemveliso eyimpumelelo kunye nexesha elide.