Amakhono okukhiqiza e-PCB athuthukisiwe, agxile ezintweni ezinembile kakhulu, ezinzima kakhulu, nezikhethekile, akhonza izimboni ezifana nocwaningo lwesayensi, i-RF, ezempi, ezokwelapha, amarobhothi, kanye ne-AI.
I-PCB Yezingqimba Eziningi
Iyini i-PCB enezingqimba eziningi? Izinselele kanye nezixazululo zokuklama (ezinemidwebo)
▶I-PCB enezingqimba eziningi (iBhodi Yesekethe Ephrintiwe) inezingqimba ezintathu noma ngaphezulu eziqhubayo (izingqimba zesignali, izingqimba zamandla, izingqimba zomhlabathi, njll.) ezibekwe ngokwahlukana ngezingqimba zokuvikela, ezihlanganiswe ndawonye ngaphansi kokushisa okuphezulu kanye nengcindezi. Ifinyelela ukuxhumana kukagesi phakathi kwezingqimba ezahlukene ngezakhiwo ezifana nezimbobo ezidlulayo kanye nama-vias angaboni. Ngezansi kunencazelo eningiliziwe yencazelo yayo, izinselele zomklamo oyinhloko, kanye nezixazululo ezihambisanayo, ezihambisana nemidwebo yokuqonda okungcono:
1. Incazelo ye-PCB ye-Multilayer
Inzuzo eyinhloko yama-PCB anezingqimba eziningi itholakala ekhonweni lawo lokusebenzisa izintambo eziyinkimbinkimbi ngaphakathi kwesikhala esilinganiselwe, ukuhlangabezana nezidingo ezincane zokusebenza kanye nokusebenza okuphezulu kwemikhiqizo ye-elekthronikhi. Asetshenziswa kabanzi kuma-smartphone, amaseva, amadivayisi ezokwelapha, nakweminye imikhakha. Esakhiweni sawo:
Izendlalelo eziqhubayo (i-foil yethusi) zidlulisela izimpawu namandla;
Izingqimba zokufaka ugesi ikakhulukazi ziyizinto ezilungiselelwa kusengaphambili (isb., i-epoxy resin);
Izendlalelo zemaski ezihlanganisiwe zivikela izifunda ezisekelweni ezimfushane;
Ukuqedwa kwendawo kuvimbela ukugqwala kwe-copper foil.
Umdwebo ongezansi ukhombisa isakhiwo se-stackup se-PCB enezingqimba eziyisithupha ene-HDI (High-Density Interconnect) multilayer, ekhombisa ukufakwa kwayo kwezingqimba kanye nomklamo:
2. Izinselele Nezixazululo Zokuklama Okuyinhloko
Inselele Yokuklama | Izinkinga Ezithile | Izixazululo |
Ubuqotho Besignali | Ukudluliswa kwesignali ngesivinini esikhulu kuthambekele ekukhanyeni nasekukhulumeni okuphambene, okuholela ekuphazamisekeni kwesignali. Ingozi yokukhuluma okuphambene iyanda ngezingqimba eziningi. | - Sebenzisa indlela yokuhlukanisa yobude obulinganayo; gcina isikhala okungenani esiphindwe kathathu ububanzi bomugqa wesignali yesivinini esikhulu. - Engeza ama-resistor afanayo (isb., 50Ω) emthonjeni wesignali. - Dlulisa amasignali esivinini esikhulu ezingqimbeni zangaphakathi bese uhlukanisa ukuphazamiseka kwezindiza zomhlabathi. |
Ubuqotho Bamandla | Izindiza zikagesi zihlushwa umsindo nokuguquguquka kwamandla kagesi; izinsiza zikagesi eziningi zivame ukuphazamiseka, okubangela ukuphahlazeka kwama-chip. | - Hlela izendlalelo zamandla eduze kwezingqimba zomhlabathi ukuze kuhlanganiswe i-filter capacitor. - Beka ama-decoupling capacitor (isb., 0.1μF) eduze kwezikhonkwane ze-chip. - Hlukanisa izindiza zamandla bese uhlukanisa izindawo ezihlukaniswe ngama-cross-split ngama-beads. |
Ukuxhumanisa izintambo kanye nokuzulazula | Ukwanda kwezingqimba kubangela isikhala esincane sezintambo; ezinye izisekelo kunzima ukuzihambisa futhi zingase zingahleleki. | - Ukuhlelwa ngokwezakhi ezisebenzayo kanye nezingxenye ezihambisanayo ezigxilile.- Dlulisa amasignali esivinini esiphezulu ezingqimbeni zangaphakathi kanye nezibonakaliso zokulawula zesivinini esiphansi ezingqimbeni zangaphandle.- Nciphisa ngokufanele ububanzi bemigqa yesignali engabalulekile ukuze ugcine iziteshi zomzila. |
Ukushabalalisa Ukushisa | Ukwakheka kobuningi obukhulu kubangela ukuqongelela kokushisa ezingxenyeni ezinamandla aphezulu, kulimaze amadivayisi futhi kuthinte ukusebenza kahle. | - Bopha ama-vias okushisa angu-1–3mm ngaphansi kwezingxenye ezikhiqiza ukushisa. - Beka i-foil yethusi eshisayo yendawo enkulu noma ufake ama-heat sink. - Hlakaza izingxenye ezinamandla aphezulu bese uvumelanisa nomklamo wepayipi lomoya ledivayisi. |
Izinkinga Zokuqondanisa Izingqimba Eziphakathi kanye Nezinqubo | Izendlalelo eziningi zidinga imijikelezo eminingi ye-lamination (isb., ibhodi elinezingqimba ezingu-8 lidinga ama-lamination angu-7); i-copper foil ehlanganisiwe phakathi kwezingqimba (ukudlula ama-30μm kungabangela ama-short circuits) kanye nemifantu ngesikhathi sokubhoboza kuvamile. | - Sebenzisa izinto ezithuthukisiwe ezifana ne-foil yethusi ephansi kakhulu. - Sebenzisa imishini yokubhoboza nge-laser ukulawula ukunemba ngaphakathi kuka-±15μm. - Sebenzisa ama-vacuum laminator ukuze unciphise ukuguquguquka kwengcindezi ngesikhathi sokumboza. |
Amanothi Ayisihluthulelo Amagama Asetshenziswayo
• Usebenzisa i-blind nge-
• I-HDI (Ukuxhumeka Okuphezulu)
• Umzila ohlukile
• I-capacitor yokuhlukanisa
• Nge-thermal
• I-laminator ye-vacuum
3. Izinto Ezibalulekile Okufanele Uzicabangele Ngokwenziwa Kwe-PCB Enezingqimba Eziningi
Inqubo yokukhiqiza yama-PCB anezingqimba eziningi iyinkimbinkimbi. Ukuphambuka kwamapharamitha noma ukusebenza okungafanele kunoma yisiphi isixhumanisi—kusukela ekukhetheni izinto zakuqala kuya ekubunjweni kokugcina nokuhlolwa—kungathinta ikhwalithi yemikhiqizo eqediwe. Nazi izinto ezibalulekile okufanele zicatshangelwe esigabeni ngasinye sokukhiqiza esiyinhloko:
1. Ngaphambi Kokukhiqiza: Ukukhethwa Kwezinto Nokwenziwa Kwezingqimba Zangaphakathi
• Ukuqhathaniswa Kwezinto Ezibalulekile
• Khetha ama-substrate ngokusekelwe ezimweni zohlelo lokusebenza: Ama-substrate e-FR-4 angabizi kakhulu afanelekela ama-electronics ajwayelekile abathengi, kuyilapho izinto ze-Rogers (ukulahlekelwa okuphansi kwe-dielectric) noma izinto ze-polyimide (ukumelana nokushisa okuphezulu) zilungele amadivayisi okuxhumana asebenzisa imvamisa ephezulu noma imishini yezindiza.
• Khetha ubukhulu befoyili yethusi ngokwezidingo zamanje: Ifoyili yethusi ejiyile iyanconywa kumasekethe wamandla anamandla aphezulu ukuze kuncishiswe ukukhiqizwa kokushisa.
• Lawula okuqukethwe kwe-resin kwama-prepregs ukuze ugweme ukuthinta ukunamathelana phakathi kwezingqimba kanye nokudluliswa kwesignali.
• Ukuhlela Amaphethini Esekethe Nokwelashwa Komphezulu
• Ngemva kokudlulisela amaphethini wesekethe kuma-laminate ambozwe ngethusi ngokuchayeka kanye nokuthuthukiswa, lawula ngokunembile amapharamitha okuqopha ukuze uvimbele ukuphambuka kobubanzi bomugqa noma amasekethe asele.
• Yenza ukwelashwa kwe-oxidation emnyama noma i-oxidation ensundu ebusweni bebhodi ngemva kokuqopha ukuze wandise ubulukhuni be-foil yethusi, uthuthukise amandla okubopha phakathi kwezingqimba ngesikhathi se-lamination elandelayo, futhi ugweme ukuhlukanisa.
2. Inqubo Yokugcotshwa Kwelaminati
• Lesi yisinyathelo esibalulekile sokuhlanganisa nokubopha izendlalelo zangaphakathi, ama-prepreg, kanye nama-foil ethusi angaphandle.
• Beka izinto ngokulandelana okuklanyelwe ukuze ugweme ukungalungi kwezingqimba phakathi kwazo.
• Lawula ngokuqinile amapharamitha okubamba: Izinga lokushisa livame ukugcinwa ku-180–220℃, ingcindezi ku-3–5MPa, futhi isikhathi sokubamba kumele siphathwe kahle. Amapharamitha angalingani angabangela amaphutha afana namabhamuza noma ukugoba ebhodini.
• Beka phambili ukunqwabelana ngezingqimba ezilinganayo ngesakhiwo esilinganayo ukuze unciphise ukugoba kwebhodi ngemva kokugoba.
3. Ukubhoboza kanye nokwakha insimbi yemigodi
• Ukubhoboza Ngokunembile
• Sebenzisa imishini yokubhoboza ye-CNC ukuqinisekisa ukunemba kwendawo yemigodi: Ububanzi bemigodi ejwayelekile kufanele bulawulwe ngaphezu kuka-0.2mm, ngokubekezelela okungu-±0.05mm noma ngaphansi.
• Hlukanisa izimo zokusetshenziswa kwemigodi edlulayo, ama-vias angaboni, kanye nama-vias angcwatshwe ukuze kugwenywe ubunzima obungadingekile. Isibonelo, ama-vias angcwatshwe angasetshenziswa kumaphakheji e-BGA kodwa adinga ukuvalwa kahle kwemigodi.
• Ikhwalithi Yokwenza Insimbi Embobeni
• Yakha izindonga zemigodi eqhubayo ngokusebenzisa i-copper plating engena-electro kanye ne-copper plating ene-electrolytic; ukujiya kwe-plating plating kanye nokufana. I-plating enganele noma engalingani ingaholela ezimbotsheni noma emaphukeni ezindongeni zemigodi, okuthinta ukuxhumana kwe-interlayer.
• Susa ukungcola okusele ezindongeni zemigodi ukuze uvimbele ukuqhekeka kweplati.
4. Ukwakhiwa Kwesendlalelo Sangaphandle Nokuqedwa Komphezulu
• Ukucutshungulwa Kwesekethe Yangaphandle
• Le nqubo ifana nokwakhiwa kwengqimba yangaphakathi, kodwa kudingeka ukunemba okuphezulu njengoba amasekethe angaphandle ethinta ngqo ukushintshwa kwezingxenye kanye nokudluliswa kwesignali. Qinisekisa ukuthi ububanzi bomugqa/isikhala sihlangabezana nezidingo zomklamo ngesikhathi se-photolithography, futhi ugweme amaphutha afana nama-circuit burrs noma amasekethe amafushane.
• Ukukhetha Okufanelekile Kokuqedela Komphezulu
• Khetha izinqubo ngokusekelwe ezidingweni zomkhiqizo:
• Ukulinganisa i-solder yomoya oshisayo (HASL): Isebenza kahle futhi iyakwazi ukusondeka kahle, ifanele ukusetshenziswa kwe-elekthronikhi yabathengi.
• Igolide lokucwiliswa: Ubuso obuyisicaba kanye nokusebenza okuzinzile, okulungele imishini yokunemba okuphezulu.
• I-OSP (i-Organic Solderability Preservative): Ishibhile ezindaweni zokusebenza ezithambile, kodwa qaphela ukuvikelwa kwayo okungekuhle ngaphansi kokushisa okuphezulu kanye nomswakama.
5. Ukubumba Nokuhlola/Ukuhlola
• Ukubumba Okunembile
• Sebenzisa imishini yokuqondisa ye-CNC ukucubungula uhlaka lwebhodi, ngokunemba kokusika kulawulwa ngaphakathi kuka-±0.2mm. Ngezakhiwo ezikhethekile ezifana nokusika kwe-V, lawula ukujula kokusika ukuze ugweme ukuphuka kwebhodi.
• Gcina imiphetho yenqubo engu-3–5mm ububanzi ukuze kube lula ukuhlanganiswa nokuhlolwa kwe-SMT okulandelayo.
• Ukuhlolwa Okuphelele
• Yenza ukuhlola okubonakalayo ngemishini ye-AOI (Automated Optical Inspection) ukuze uthole amaphutha afana namasekethe avulekile noma imaski ye-solder engalingani.
• Yenza izivivinyo zokusebenza kukagesi (isib., isivivinyo se-flying probe, isivivinyo se-ICT) ukuqinisekisa ukuthi ukuphambuka kwe-impedance kungaphakathi kuka-±10%.
• Sebenzisa ukuhlolwa kwe-X-ray kumasekethe afihliwe anezingqimba eziningi ukuqinisekisa ngekhwalithi kanye nokuqondanisa phakathi kwezingqimba, ukuqeda amaphutha angaba khona.
Isichazamazwi Samagama Ayisihluthulelo
• Ukukhulelwa kusengaphambili
• Ukushiswa okumnyama/ukushiswa okunsundu
• Ukuhlukaniswa
• Uphuphuthekile nge/ungcwatshwe nge
• I-copper plating engena-electro/i-electrolytic copper plating
• I-HASL (Ukulinganisa Umoya Oshisayo)
• Igolide lokucwiliswa
• I-OSP (Isivikelo Sokushiswa Kwezinto Eziphilayo)
• I-AOI (Ukuhlolwa Okuzenzakalelayo Kokukhanya)
• Ukuhlolwa kwe-Flying probe/ICT (Ukuhlolwa Kwangaphakathi Kwesekethe)
• Unqenqema lwenqubo
Thumela umbuzo
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