In PCB uyilo, sikwasoloko sijonge ukuphuculwa kwetekhnoloji entsha ukwenza lula umsebenzi wethu, kwaye sifezekise impumelelo eninzi njengoko uyilo luba luncinci kwaye luxinene. Enye yolu phuculo yi-micropores. Ezi vias laser-yombiweyo zincinci kune vias eqhelekileyo kwaye zinemiba eyahlukeneyo ratios. Ngenxa yobuncinci babo, bawenza lula umsebenzi wokulandela umkhondo, okusivumela ukuba sipakishe iingcingo ezininzi kwindawo emxinwa. Nalu ulwazi oluthe kratya malunga nomlinganiso we-microvias kunye nokuba ukusebenzisa ii-microvias kunokukunceda njani kuyilo lwePCB yakho.

Ukuphonononga PCB ngokusebenzisa imingxunya

Okokuqala, makhe sijonge ulwazi olusisiseko malunga nemingxuma kunye nokusetyenziswa kwazo kwiibhodi zesekethe eziprintiweyo. Ngemingxuma kukho imingxuma kwiPCB. Imingxunya eplathiweyo inokuqhuba imiqondiso yombane ukusuka kwelinye umaleko ukuya kwelinye. Kanye njengokuba umkhondo uqhuba imiqondiso ngokuthe tye kwi-PCB, i-vias inokuqhuba le miqondiso ngokuthe nkqo. Ubukhulu bemingxunya bunokwahluka ukusuka kwincinci ukuya enkulu. Inkulu ngokusebenzisa imingxuma isetyenziselwa amandla kunye neegridi zokumisa, kunye neempawu zoomatshini zinokudityaniswa nebhodi. Umgangatho ngokusebenzisa imingxuma idalwe ngokugaya oomatshini. Zinokwahlulwa zibe ngamacandelo amathathu:

Ngomngxuma: umngxuma owombiweyo ukusuka kumaleko aphezulu ukuya kumaleko asezantsi yonke indlela ukuya kwiPCB.

Umngxuma oyimfama: Ngumngxuma owembiweyo ukusuka kumaleko angaphandle ukuya kumaleko angaphakathi ebhodi yesekethe, endaweni yokungena kwibhodi yesekethe njengomngxuma odlulayo.

Imingxunya eGqwebileyo: Imingxuma eqala ize iphele kuphela kumaleko angaphakathi ebhodi. Le mingxunya ayinwebeki kuwo nawuphi na umaleko wangaphandle.

Kwelinye icala, vias micro zahlukile vias eqhelekileyo ukuba yombiwa nge laser, nto leyo ezenza zibe zincinci kunezoqheliso eziqhelekileyo. Ngokobubanzi bebhodi, ukugaya oomatshini ngokuqhelekileyo kungabi ngaphantsi kwe-0.006 intshi (0.15 mm), kwaye imingxuma encinci iba yincinci ukusuka kulo bukhulu. Omnye umahluko nge-microvias kukuba zihlala zithatha iileya ezimbini kuphela, kuba ukufaka ubhedu kule mingxuma mincinci kunokuba nzima kubavelisi. Ukuba ufuna ukudibanisa ngokuthe ngqo kwiileya ezingaphezu kwezibini, unokupakisha i-microvias kunye.

I-micropores eqala kwi-surface layer ayifuni ukuba izaliswe, kodwa kuxhomekeke kwisicelo, izinto ezahlukeneyo ziya kusetyenziswa ukuzalisa i-micropores engcwatywe. Iimicrovias ezipakishweyo zidla ngokuzaliswa ngobhedu olune-electroplated ukuqonda unxibelelwano phakathi kwee-vias ezipakishweyo. Enye indlela yokudibanisa i-microvias ngokusebenzisa izitaki zomaleko kukuzigxadazela kwaye uzidibanise nemikhondo emifutshane. Njengoko kubonisiwe kulo mzobo ungezantsi, iprofayile ye-microvia yahlukile kwiprofayili yesiqhelo nge, okukhokelela kumlinganiselo owahlukileyo.

Yintoni umlinganiselo weMicrovia kwaye kutheni ibalulekile kuyilo lwePCB?

Ubungakanani bomngxuma wokutyhubela umngxuma ngumlinganiselo phakathi kobunzulu bomngxuma kunye nobubanzi bomngxuma (ubunzulu bomngxuma kunye nobubanzi bomngxuma). Ngokomzekelo, ibhodi yesekethe eqhelekileyo kunye nobukhulu be-0.062 intshi kunye ne-0.020 intshi ngemingxuma kufuneka ibe nomlinganiselo we-3: 1. Lo mlinganiselo unokusetyenziswa njengesikhokelo sokuqinisekisa ukuba umenzi akagqithi kumandla omenzi. Zizixhobo zokomba. Ukugrumba okusemgangathweni, umyinge we-aspect ratio ngokuqhelekileyo kufuneka ungabi ngaphezu kwe-10: 1, eya kuvumela iplanga ye-intshi engu-0.062 ukuba ibhobhoze i-intshi engu-0.006 (0.15 mm) umngxuma kuyo.

Xa usebenzisa i-micropores, i-aspect ratio iyahluka kakhulu ngenxa yobukhulu kunye nobunzulu. Kunokuba nzima ukubeka imingxuma emincinci. Ukuzama ipleyiti umngxuma omncinane umaleko 10 kwibhodi yesekethe kuya kubangela iingxaki ezininzi kubavelisi PCB. Nangona kunjalo, ukuba umngxuma unwenwela ezimbini kuphela kwezi maleko, ukucwenga kuba lula kakhulu. IPC isetyenziselwa ukuchaza iipores ngokusekelwe kubukhulu bazo, obulingana okanye ngaphantsi kwe-0.006 intshi (0.15 mm). Ngokuhamba kwexesha, lo bungakanani buxhaphake, kwaye i-IPC yagqiba ekubeni iguqule inkcazo yayo ukuze igweme ukuhlaziywa rhoqo njengoko kutshintsha iteknoloji. I-IPC ngoku ichaza i-micropore njengomngxuma onomlinganiselo we-1: 1, ukuba nje ubunzulu bomngxuma bungadluli kwi-intshi ye-0.010 okanye i-0.25 mm.

Indlela iMicrovia inceda ngayo ukuhambisa umkhondo kwibhodi yesekethe

Igama lomdlalo kuyilo lwe-PCB kukuba njengoko ubuninzi betekhnoloji ye-PCB busanda, iindlela ezininzi zokuhola zifunyanwa kwindawo encinci. Oku kukhokelele ekusetyenzisweni kwe-vias eyimfama kunye ne-vias engcwatyiweyo, kunye neendlela zokubethelela ii-vias kwiipads zokunyuka komphezulu. Nangona kunjalo, imingxunya eyimfama kunye ne-vias engcwatyelwe kunzima ngakumbi ukuvelisa ngenxa yamanyathelo okomba ongezelelweyo abandakanyekayo, kunye nokugrumba kunokushiya izinto kwimingxuma, kubangela iziphene zokuvelisa. Iindlela zesiqhelo zidla ngokuba nkulu kakhulu ukuba zingazinziswa kwiindawo ezincinci zokuhombisa umphezulu kwizixhobo zanamhlanje ezinoxinano oluphezulu. Nangona kunjalo, i-micropores inokunceda ukusombulula zonke ezi ngxaki:

I-Microvia yenza kube lula ukwenza ii-vias ezincinci ezingaboniyo kunye nokungcwatywa.

I-Micro vias iya kulungeleka kwiipads ezincinci zokuxhoma ngaphezulu, zizenze zilungele izixhobo zokubala eziphezulu ze-pin ezifana ne-ball grid arrays (BGA).

Ngenxa yobukhulu bayo obuncinci, i-microvia iya kuvumela i-wiring engaphezulu kwayo.

Ngenxa yobukhulu bayo, i-microvias inokunceda ukunciphisa i-EMI kunye nokuphucula imiba yengqibelelo yomqondiso.

IMicrovias yindlela ephucukileyo yokwenziwa kwePCB. Ukuba ibhodi yakho yesekethe ayifuni kubo, ngokuqinisekileyo uya kufuna ukusebenzisa ii-vias eziqhelekileyo ukunciphisa iindleko. Nangona kunjalo, ukuba uyilo lwakho luxinene kwaye lufuna indawo eyongezelelweyo, jonga ukuba ukusebenzisa i-microvias kuyanceda. Njengesiqhelo, ngaphambi kokuyila i-PCB ene-microvias, kungcono ukuqhagamshelana nomenzi wekhontrakthi ukujonga ukusebenza kwayo.

Ukusetyenziswa okuchanekileyo kweMicrovias kuxhomekeke kwizixhobo zakho zoyilo zePCB

Emva kokumisela uqhagamshelwano nomenzi, inyathelo elilandelayo kukuqwalasela isixhobo sakho soyilo sePCB ukuze usebenzise iimicrovias. Ukusebenzisa ngokufanelekileyo iinkcukacha zoyilo lwe-microvia, kufuneka wenze izinto ezininzi kwisixhobo. Oku kuya kubandakanya ukumila komngxuma omtsha kunye nemithetho yoyilo elandelayo. I-Microvias inokupakishwa, edla ngokungafumaneki nge-vias rhoqo, ngoko ke isixhobo sakho kufuneka sikwazi ukujongana nale nto.