Namuhla, ukuthambekela kwemikhiqizo ye-elekthronikhi eqhubeka ngokuhlangana kudinga ukwakheka okuyizinhlangothi ezintathu ze- I-Multilayer PCB. Kodwa-ke, ukufakwa kwesendlalelo kuphakamisa izingqinamba ezintsha ezihlobene nalo mbono wedizayini. Enye yezinkinga ukuthola ukwakheka kwekhwalithi ephezulu kwephrojekthi.

Ukunqwabelana kwe-PCBS kuya ngokuya kubaluleke njengoba amasekethe aphrintiwe akhula ngokwengeziwe akhiqizwa ngezendlalelo eziningi.

Idizayini enhle ye-PCB lamination ibalulekile ukunciphisa imisebe yamasekethe e-PCB namasekethe ahambisanayo. Ngokuphambene nalokho, i-buildup embi ingakhuphula kakhulu imisebe, eyingozi ngokubuka kokuphepha.

Kuyini PCB emakhiyubhi?

The PCB lamination layers the insulation and copper of the PCB before the final layout design is completed. Ukwakha ukustaka okusebenzayo kuyinkqubo eyinkimbinkimbi. I-PCB ixhuma amandla nezimpawu phakathi kwamadivayisi aphathekayo, futhi ukubekwa okufanele kwezinto zebhodi kuthinta ngqo umsebenzi wayo.

Kungani PCB yokuvikela ngocwazi?

Ukuthuthukisa i-PCB lamination kubalulekile ekwakheni amabhodi asebenzayo. I-PCB lamination inezinzuzo eziningi ngoba ukwakheka okunemigqa eminingi kuthuthukisa amandla okusabalalisa amandla, kuvikela ekuphazanyisweni kwe-electromagnetic, kubeke umkhawulo ekuphazanyisweni kokuwela, futhi kusekela ukudluliswa kwesiginali esheshayo.

Yize inhloso eyinhloko yokufakwa kwezitaki ukubeka amasekethe amaningi kagesi ebhodini elilodwa ngezendlalelo eziningi, isakhiwo sesitaki se-PCB sinikeza nezinye izinzuzo ezibalulekile. Lezi zinyathelo zifaka phakathi ukunciphisa ukuba sengozini kwebhodi lesifunda emsindweni wangaphandle nokunciphisa izinkinga ze-crosstalk nezimpedance ezinhlelweni zejubane.

Ukuchithwa okuhle kwe-PCB nakho kungasiza ekuqinisekiseni izindleko zokukhiqiza eziphansi zokugcina. I-PCB lamination ingonga isikhathi nemali ngokukhulisa ukusebenza kahle nokwenza ngcono ukuhambisana kwe-electromagnetic kuyo yonke iphrojekthi.

Umthombo wesithombe: pixabay

Amanothi nemithetho yokuklanywa kwe-PCB lamination

Inombolo yesendlalelo ephansi

Izitaki ezilula zingafaka izingqimba ezine ze-PCBS, kuyilapho amabhodi anzima kakhulu edinga ukuqanjwa ngokulandelana kobuchwepheshe. Yize kuyinkimbinkimbi ngokwengeziwe, amazinga aphezulu avumela abaklami isikhala esiningi sokubeka ngaphandle kokukhulisa ubungozi bokuhlangabezana nezixazululo ezingenakwenzeka.

Imvamisa, kudingeka izitezi eziyisishiyagalombili noma ngaphezulu ukufeza ukubekwa kwezinga elilungile nezikhala ukukhulisa ukusebenza. Imisebe nayo ingancishiswa ngokusebenzisa indiza enkulu nendiza yamandla kwiphaneli ye-multilayer.

Low layer

Ukuhlelwa kwezendlalelo zethusi nezokuhlukanisa okwakha isifunda kwenza umsebenzi we-PCB odlulanayo. Ukuvimbela i-PCB warping, yenza isigaba esiphambanayo sebhodi silingane futhi silinganise lapho uhlela izingqimba. Isibonelo, kuzendlalelo eziyisishiyagalombili, izendlalelo zesibili nezesikhombisa kufanele zifane ngobukhulu ukufeza ibhalansi efanelekile.

Isendlalelo sesiginali kufanele ngaso sonke isikhathi siseduze nendiza, kuyilapho izindiza zamandla nezesisindo zihlanganiswe ngokuqinile. Kungcono ukusebenzisa izingqimba eziningi zokubeka phansi njengoba zivame ukunciphisa imisebe kanye ne-impedance yomhlaba.

● Uhlobo lwezinto zokubeka

Izici ezishisayo, ezisebenza ngomshini nezikagesi ze-substrate ngayinye nokuthi zisebenzisana kanjani zibalulekile ekukhetheni izinto ezibonakalayo ze-PCB lamination.

Ibhodi lesifunda livame ukwakhiwa ngomgogodla we-fiberglass oqinile, ohlinzeka ubukhulu nokuqina kwe-PCB. Amanye ama-PCBS aguquguqukayo angenziwa ngamapulasitiki okushisa aphakeme aguquguqukayo.

Isendlalelo saphezulu isicwecwe esincanyana esenziwe ngocwecwe lwethusi olunamathiselwe ebhodini. Ithusi likhona ezinhlangothini zombili ze-PCB emaceleni amabili, futhi ukushuba kwethusi kuyahluka ngokuya ngenani lezendlalelo ze-PCB.

The top of the copper foil is covered with a blocking layer to make the copper trace in contact with other metals. Lokhu okubalulekile kubalulekile ukusiza abasebenzisi ukuthi bagweme ama-welding jumpers endaweni efanele.

Isendlalelo sokuphrinta kwesikrini sisetshenziselwa ungqimba lwe-solder resist ukwengeza izimpawu, izinombolo nezinhlamvu zomhlangano olula nokuqonda okungcono kwebhodi.

● Thola izintambo nezimbobo

Abaqambi kufanele bahambise amasiginali wejubane elingaphezulu kwezendlalelo eziphakathi phakathi kwezendlalelo. Lokhu kuvumela indiza yasemhlabeni ukuthi inikeze isihlangu esiqukethe imisebe ekhishwa ku-orbit ngejubane elikhulu.

Ukubekwa kweleveli yesiginali esiseduze nezinga lendiza kuvumela amandla okubuya ukuthi ageleze ezindizeni eziseduze, ngaleyo ndlela anciphise ukubuyela emuva kwendlela. Akukho capacitance eyanele phakathi kokuphakelwa kwamandla okuseduze nongqimba lokubeka phansi ukuhlinzeka ukwehla ngaphansi kwe-500 MHz kusetshenziswa izindlela ezijwayelekile zokwakha.

● Isikhala phakathi kwezendlalelo

Njengoba amandla we-capacitance ancipha, ukuhlangana okuqinile phakathi kwesiginali kanye nendiza yokubuya yamanje kubalulekile. Ukunikezwa kwamandla nokwehliswa komhlaba nakho kufanele kuhlanganiswe ngokuqinile.

Izendlalelo zesiginali kufanele zihlale zisondelene noma ngabe zisezindizeni eziseduze. Ukuhlangana okuqinile nokuhlukanisa phakathi kwezendlalelo kubalulekile ekusayineni okungaphazanyiswa nokusebenza kukonke.

isiphetho

Ubuchwepheshe bokuvikela i-PCB Kunezinhlobo eziningi zemiklamo ye-PCB ehlukahlukene. Lapho kubandakanyeka izendlalelo eziningi, indlela ye-THREE-DIMENSIONAL ebheka ukwakheka kwangaphakathi nokuhlelwa komhlaba kumele kuhlanganiswe. Ngesivinini sokusebenza esiphakeme samasekethe anamuhla, ukufakwa kwe-PCB ngokucophelela kufanele kwenziwe ukuze kuthuthukiswe amandla wokusabalalisa nokukhawulela ukuphazamiseka. I-PCBS eyenziwe kabi inganciphisa ukudluliswa kwesiginali, ukukhiqiza, ukuhanjiswa kwamandla, nokwethenjelwa kwesikhathi eside.