I-Blind Via PCB: Imithetho Yokuklama, Izinhlobo Zokwakha, Izindleko kanye Nomhlahlandlela

I -blind via PCB iyibhodi lesifunda lapho i-vias eyodwa noma ngaphezulu ixhuma ungqimba lwethusi lwangaphandle nongqimba oluthile lwangaphakathi ngaphandle kokungena ekujikeni kwebhodi eligcwele. Umgodi uqala ebusweni bese uma — ngokuqondile — ethusini langaphakathi eliqondiwe, elisebenza njengendawo yokuphela ebonakalayo ngesikhathi sokubhoboza nge-laser. Leyo mpahla eyodwa ebonakalayo ihlukanisa i-blind via PCB kumabhodi ajwayelekile anezingqimba eziningi ngezindlela ezintathu ezilandelayo: i-via ithatha kuphela izingqimba ezixhumayo kunokuba idle isikhala sokuhambisa kuzo zonke izingqimba; ububanzi bephedi buncane (ngokuvamile bungu-0.25–0.35mm uma kuqhathaniswa no-0.50–0.70mm wembobo edlulayo), okuvumela i-geometry ye-feniout engenakwenzeka ngokwejiyometri ngokubhoboza ngomshini; futhi i-via ayinayo i-stub yethusi engasetshenziswanga ngaphansi kwengqimba yokuphuma kwesignali, isusa ama-resonances e-quarter-wave stub angcolisa iziteshi ezingaphezu kuka-10 Gbps. Lo mhlahlandlela ubhalelwe onjiniyela behadiwe, abaklami be-PCB, kanye nonjiniyela bokuthola ulwazi abadinga ukwenza izinqumo zangempela mayelana nama-PCB angaboni — ukuthi kufanele bawasebenzise yini, uhlobo lokwakha oluzocaciswa, ukuthi yimiphi imithetho yokuklama engaxoxiswana ngayo, nokuthi yini ehlukanisa umenzi onekhono kulowo ozohluleka kakhulu.

Thola Isilinganiso Esingaboni Nge-PCB

Ukuthi i-PCB iyini eyimpumputhe - nokuthi yini eyenza ihluke

Izakhiwo Ezintathu Ezihamba Nge-HDI Amabhodi

Kungani Ama-Blind Vias Andisa Ubuningi Bomzila

Ebhodini elijwayelekile elinezingqimba eziyi-10, i-through-hole via ithwala isignali kusuka ku-L1 kuya ku-L2 kodwa ithatha isikhala sephedi kuzo zonke izingqimba eziyi-10. Ingqimba ngayinye edlula kuyo ilahlekelwa umzila wokuqondisa we-through ngayinye ekwakhiweni. Ngama-through-hole signal via angu-200 ebhodini eliminyene, isijeziso sokuqondisa sihlangana kulo lonke i-layer stack.

I-blind via esuka ku-L1 kuya ku-L2 isebenzisa lezo zendlalelo ezimbili kuphela. Izendlalelo eziyisishiyagalombili ezisele azinawo nhlobo umkhawulo wephedi kuleyo via. Uma ihlanganiswe nobubanzi bephedi obuncane — i-blind via engu-0.10mm ene-land pad engu-0.30mm uma iqhathaniswa ne-drill engu-0.30mm ene-pad engu-0.60mm yesignali ejwayelekile nge — yilokhu okwenza i-pitch BGA fanout engu-0.50mm kanye ne-0.40mm ifinyeleleke ngokomzimba. Kulezo zendlalelo, umkhawulo wejometri uphelele: ububanzi be-pad-plus-annular-ring be-through-hole via budlula isikhala se-pitch, ngakho-ke i-blind via akuyona inketho yokusebenza kodwa isidingo se-topological.

Incazelo ye-IPC-T-50M

Ngokwe-IPC-T-50M, i-microvia (igama elisetshenziswa ezindinganisweni ze-IPC ze-blind-drilled via) iyisakhiwo se-blind esine-aspect ratio ephezulu engu-1:1 kanye nokujula okuphelele okungekho ngaphezu kuka-0.25mm okulinganiswe kusukela ku-capture land foil kuya ezweni eliqondiwe. Izakhiwo ezidlula lokhu kujula noma i-aspect ratio ziwela ngaphandle kwencazelo ye-IPC microvia futhi zidinga ukuhlolwa kobunjiniyela ukuze kuqinisekiswe ukuthembeka kwe-plating. Lokhu akusikho isiqondiso - ngumngcele ochaza ukuthi i-copper plating chemistry ingafinyelela yini phansi kwe-via barrel ngokuthembekile.

Izimo Ezintathu Lapho I-Blind Vias Isinqumo Esifanele Sobunjiniyela

Imiklamo eminingi ayidingi ama-vias angaboni. Isinqumo kufanele siqhutshwe yinye yezimo ezintathu zobunjiniyela ezithile, hhayi isifiso sokuba yinkimbinkimbi kwebhodi noma umbono wokuthi i-HDI isho ikhwalithi ephezulu.

Isimo 1: Iphimbo Lengxenye Liphoqa Ukungenzeki Kwejiyometri

Lesi yi-trigger ecacile nevame kakhulu. Ku-pitch engu-0.65mm BGA, imbobo ebhoboziwe engu-0.30mm enendandatho engu-0.15mm ohlangothini ngalunye idinga iphedi engu-0.60mm — ingena kahle ngaphakathi kwesikhala sebhola esingu-0.65mm. Ku-pitch engu-0.50mm, i-geometry efanayo iyahluleka: iphedi engu-0.60mm > i-pitch engu-0.50mm. I-blind via engu-0.10mm enephedi yomhlaba engu-0.30mm ingena ngaphakathi kwe-0.50mm ene-margin.

Uma iphimbo lingu-0.40mm umkhawulo uyaqina kakhulu. Ngisho nama-vias angaboni angu-0.10mm angadinga ukucushwa kwe-via-in-pad — okubeka i-via ngqo ngaphakathi kwe-BGA land pad — ngoba akukho mzila wokuhambisa okhona phakathi kwama-pads aseduze ukuze kuphume okuvamile. Lokhu akuyona inketho yokuhambisa; i-geometry ye-fananout ayinaso esinye isisombululo.

Isimo 2: I-Via Stub Resonance Yehlisa Ubuqotho Besignali Ngaphezulu kuka-~10 Gbps

Imbobo edlulayo ngokuxhuma i-L1 ku-L4 ebhodini elinezingqimba ezingu-16 ishiya i-stub yethusi kusukela ku-L4 kuya ku-L16. Leyo stub isebenza njengomugqa wokudlulisa ovulekile ongaqediwe. Imvamisa yayo yokuzwana kwamagagasi angu-quarter-wave ithi:

f = c / (4 × L_stub × √ε_r)

Ku-stub engu-1.5mm ku-FR4 (ε_r ≈ 4.3), lokhu kuzwakala kwenzeka cishe ku-12 GHz. Kuleyo mvamisa, i-stub ibonisa amandla esignali emuva esiteshini, idala i-notch yokulahlekelwa kokufakwa engadlula i-15 dB — inhlekelele kunoma yisiphi isixhumi esibonakalayo se-SerDes esisebenza eduze noma ngaphezulu kwaleyo mvamisa. Ngokwezincazelo ze-IEEE 802.3 100GBASE-CR4, ukulahlekelwa kokufakwa okuphezulu ku-12.5 GHz kungu-1.5 dB nge-via; i-stub engu-1.5mm idlula lokhu ngomyalo wobukhulu.

Ukubhoboza ngemuva kususa ingxenye enkulu yesigxobo kodwa kushiya ingxenye esele engu-0.1–0.2mm ngenxa yokubekezelelana kokubhoboza. Kumashaneli angu-56 Gbps PAM4 (28 GHz Nyquist) nangaphezulu, lesi sigxobo esisele sisalokhu sibalulekile ngogesi. I-blind via ayinasigxobo ngokwakhiwa - yindlela kuphela eqeda ngokuphelele ukuzwakala kwesigxobo kungakhathaliseki ukuthi imvamisa ingakanani.

Kuma-PCIe Gen 3/4 kanye ne-DDR4 asebenza ku-8–16 Gbps, kunconywa ukwenza imodeli ye-stub resonance ngaphambi kokucacisa ama-blind vias — ukubhoboza emuva ebhodini elijwayelekile kungaba okwanele futhi kungabizi kakhulu. Kuma-112G SerDes, i-PCIe Gen 5/6, kanye ne-DDR5-6400+, ama-blind vias ngokuvamile ayisisombululo esifanele sobunjiniyela.

Isimo 3: Imingcele Yendawo Yebhodi Ayikwazi Ukuhlangatshezwa Ngezingqimba Ezijwayelekile Eziningi

Umklamo ungahamba ngendlela ehlanzekile ebhodini elijwayelekile elinezingqimba ezingu-8 ku-110×85mm kodwa kumele ulingane nendawo ebiyelwe engu-85×65mm. I-HDI ene-blind via fanout kanye ne-via-in-pad ibuyisa indawo ngokunciphisa indawo enyathelweni yephedi ngayinye futhi ivumele indlela yokuphuma ye-BGA iqonde ngqo ku-via ngaphansi kwephedi, isuse ngokuphelele isiteshi sokuphuma. Ibhodi le-HDI libiza kakhulu ngesentimitha lesikwele kodwa izindleko zokuhlanganisa zingase zibe ngaphansi uma ibhodi elincane linciphisa izindleko zokuvala, isisindo, noma ubunzima bokuhlanganisa. Lokhu kuwukuhwebelana kwezinga lesistimu okudinga imodeli yezindleko enembile, hhayi ukucabanga okuzenzakalelayo.

Ama-vias angaboni ayisinqumo esingalungile uma: iphimbo le-BGA lingu-≥0.65mm nendawo eyanele yebhodi; amaza esignali angaphansi kuka-5–10 Gbps lapho i-stub resonance ingalinganiswa khona; indawo yebhodi ayinqunyelwe; noma umkhiqizo usesigabeni sokuqala se-prototype lapho kulindeleke khona ukubuyekezwa komklamo kanye nesikhathi sokuhola se-HDI (izinsuku ezingu-8–21 uma kuqhathaniswa nezinsuku ezingu-5–7 ze-multilayer ejwayelekile) kuzonciphisa ukuphindaphinda.

Imithetho Yokuklama Engaboni: Ukubhanqa Izingqimba, Usayizi Wephedi, Isilinganiso Sokubukeka, kanye Ne-Via-in-Pad

Ukubhanqa Izendlalelo: Isithiyo Esingokomzimba Esingenakuxoxiswana Ngaso

I-blind via can ihlanganisa ungqimba olulodwa lwe-dielectric. I-laser iyavutha ngokusebenzisa i-buildup prepreg yangaphandle bese ima kungqimba lokuqala lwethusi elihlangana nalo — ukuthi ithusi langaphakathi liyindawo yokuma ebonakalayo. Akunakwenzeka ukuthi i-blind via eyodwa ixhume i-L1 ku-L3 ekwakheni lapho ithusi le-L2 likhona phakathi kwazo; ithusi le-L2 liyayiqeda i-laser ngaphambi kokuba ifike ku-L3.

Leli yiphutha lokuklama i-HDI elibiza kakhulu, futhi alinaso isilungiso esingabizi kakhulu. Umklamo ochaza ama-blind vias e-L1→L3 ekwakhiweni kohlobo I (1+N+1) udinga ukuhlelwa kabusha okuphelele kwezingqimba zokuphunyuka ze-HDI uma zibanjwa ekubuyekezweni kwe-DFM. Umthetho ulula ukuwusho futhi uvame ukwephulwa: ekwakhiweni kohlobo I, ama-blind vias axhuma i-L1 ku-L2 kuphela (futhi aboniswa ebusweni obungezansi njengo-L(n)↔L(n-1)). Ukuxhumeka okunezinga ezimbili kudinga ukwakhiwa kohlobo II noma ama-vias amabili ahlukene — eyodwa i-L1→L2 kanye nenye i-L2→L3 — enephedi yokubamba ephakathi ku-L2.

Ukuze uthole ulwazi oluphelele lokuthi kungani ukulandelana kwe-lamination kudala lo mkhawulo, bheka i- blind nge-PCB lamination process guide.

Usayizi Wezitebhisi Zomhlaba: Iphutha Lokubhalisa Liyisithiyo Esibusayo

I-laser ngokwayo ifika ekunembileni okungu-±25–35µm. Inkinga ukuthi i-target pad yengqimba yangaphakathi ingase ingabi lapho umklamo uthi ikhona. Umjikelezo ngamunye we-lamination wethula iphutha lokubhalisa elingu-±30–50µm le-XY njengoba izingqimba zangaphandle zibhalisa kuma-fiducial angaphakathi. Ekwakhiweni kohlobo I (imijikelezo emibili), ukungaqiniseki kwesimo esibi kakhulu sendawo ephakathi nendawo maqondana ne-target pad yayo kufinyelela ku-±65–100µm. I-land pad enobukhulu bokunemba kwe-laser yodwa - engayinaki i-registration - izokhiqiza ukuqhekeka kwendandatho ye-annular njalo ekukhiqizweni.

Ikholomu encane imelela iphansi lejometri elingaphansi lapho ukuqhekeka kuqinisekiswa khona ekushintsheni okuvamile kokubhaliswa. Ikholomu ephephile ekukhiqizeni iyinhloso efanele yemiklamo ehloselwe isivuno sokukhiqiza esingaphezu kuka-97%.

Isilinganiso Sokubukeka: Umkhawulo Wokuthembeka, Hhayi Isilinganiso Sokukhiqiza Kuphela

Ngokwe-IPC-2226, isilinganiso esiphezulu sesici esinconywayo sama-vias angaboni singu-1:1 — ukujula okuhlukaniswe ngobubanzi akufanele kudlule u-1. Empeleni, idatha yokuthembeka ikhombisa ukuthi umkhawulo uqinile. Ukuhlolwa phakathi kwezilinganiso ezahlukene zesici kukhombisa ama-microvia angu-0.7 abhekene nesilinganiso sokusinda ekuhlolweni kokuphila okusheshayo, kuyilapho ama-microvia anezilinganiso zesici esingu-1 ehluleka ngaphakathi kwemijikelezo embalwa yokushisa. Imodi yokwehluleka ukukhathala kwethusi edolweni elihambisanayo — ukuguquka phakathi kodonga lomgqomo kanye nephedi elingezansi — lapho ukucindezeleka kokungafani kwe-CTE kugxila khona ngesikhathi sokujikeleza kokushisa. I-via idlula ukuhlolwa kukagesi kokuqala ekushiseni kwegumbi futhi yehluleka ensimini.

Ukukhetha kwe-prepreg kulawula isilinganiso sesici ngqo:

• Ukulungiswa kohlobo lwe-1080 ku-65–70% okuqukethwe kwe-resin kuya ku-60–70µm — ngesilinganiso se-aspect ratio esingu-0.10mm = 0.65:1 ✓
• Ukulungiswa kohlobo lwe-2116 ku-52–58% okuqukethwe kwe-resin kuya ku-110–130µm — nge-0.10mm via, isilinganiso sesici = 1.1–1.3:1 ✗
• Ukwelashwa kokulungiselela kohlobo lwe-7628 kuya ku-170–200µm — ungasebenzisi njenge-dielectric yangaphandle yokwakheka kwanoma iyiphi i-laser-drilled nge

Cacisa i-prepreg yohlobo lwe-1080 noma lwe-106 yazo zonke izendlalelo zangaphandle ze-HDI. Lolu shintsho lwenothi lokwenziwa olulodwa luletha ukwephulwa okukhulu kwesilinganiso se-aspect ekuhambisaneni ngaphandle kokushintsha kwendlela kanye ne-premium yamahhala. Kubalulekile futhi ngekhwalithi yodonga: ama-prepreg aphansi okuqukethwe kwe-resin anokuqukethwe okuphezulu kwe-fiberglass, okunciphisa ngokungefani ngaphansi kwe-CO₂ laser, okukhiqiza ama-rough ngezindonga okwandisa izidingo ze-desmear futhi kunciphise ukunamathela kwe-plating.

I-Via-in-Pad: Uma Idingeka Futhi Indlela Yokuyichaza Kahle

I-Via-in-pad ibeka i-blind ngqo ngaphakathi kwe-BGA noma i-QFN land pad kunokuba iseduze nayo. Iyadingeka uma i-BGA pitch ingu-0.40mm noma ngaphansi ngenani eliphezulu le-I/O — isikhala se-pad asanele ukuhambisa i-a via eceleni kwe-pad ngenkathi kugcinwa isikhala esincane kuma-pad aseduze, okwenza ukufakwa kwe-in-pad kube yisisombululo se-feniout kuphela esisebenzayo ngokwejiyometri.

I-via-in-pad engagcwalisiwe izokhipha i-solder ngesikhathi sokugeleza kabusha. I-solder ingena emgqonyeni, ayibuyi, futhi umphumela uba yi-joint engenaso i-solder enokuqhuba okwanele kokuhlolwa kokuqhubeka kodwa amandla anele omshini wokujikeleza kokushisa noma ukudlidliza. Le modi yokwehluleka idlula konke ukuhlolwa okujwayelekile kwefektri - ivela ekubuyiselweni kwensimu.

Amanothi okwenziwa kwe-via-in-pad kumele acacise zonke izakhi ezine:

• Indlela yokugcwalisa: Ukugcwaliswa kwe-copper electroplated — hhayi ukugcwaliswa kwe-epoxy noma kwe-resin, okuncipha ngesikhathi sokulungiswa futhi kushiye umgodi ebusweni bephedi othinta ivolumu yokunamathisela kanye nokwakheka kwamalunga
• Ukuhlela: I-CMP (ukuhlela kwamakhemikhali-okusebenza ngomshini) kuya ku-≤15µm ukuvela ngaphezu kwethusi elizungezile kwephimbo elingu-0.40mm; ≤25µm kuyamukeleka kwephimbo elingu-0.50mm
• Imininingwane engenalutho: ≤10% indawo engenalutho enqamula ingxenye ngayinye ye-IPC-6012; chaza ≤8% yezinhlelo zokusebenza ezidinga imijikelezo yokushisa engaphezu kuka-500
• Ukunciphisa ukuvuleka kwe-stencil: Nciphisa ukuvuleka kwe-stencil yokunamathisela ezindaweni ezisebenzisa i-pad kufinyelele ku-80–90% wendawo ye-pad ejwayelekile ukuze kulungiswe ukuvela kokugcwalisa; lokhu kumele kudluliselwe kunjiniyela wokuhlanganisa ngokwehlukana — akudluli ngokuzenzakalelayo kusuka kumanothi okukhiqiza.

Ukukhetha Uhlobo Lokwakha lwe-HDI: Yikuphi Okudingwa Yidizayini Yakho Ngempela

Uhlobo lokwakha lwe-HDI kumele lukhethwe ngaphambi kokuba kuqale ukwakheka. Lunquma ukuthi yimaphi amapheya ezingqimba asekela ama-vias angaboni, ukuthi ibhodi lidinga imijikelezo emingaki ye-lamination, nokuthi ibiza malini. Ukuthola ukungafani kohlobo lokwakha ekubuyekezweni kwe-DFM — ngemuva kokuthi ukuhlelwa sekuqediwe — kudinga ukuhlelwa kabusha kwengqimba ngayinye ye-escape ye-HDI ethintekile.

I-Logic Yokukhetha

Qala kusukela ekuphakameni kwengxenye okulinganiselwe kakhulu, nquma uhlobo oluncane kakhulu lwe-via olufinyelela i-fanatout, bese uqinisekisa ukuthi wonke ama-layer pair abalulekile angaxhunyaniswa ne-blind etholakalayo nge-pair kulolo hlobo lokwakha. Ungakhethi Uhlobo II noma III ngokuqagela — umjikelezo ngamunye we-lamination owengeziwe ukhiqiza ingozi futhi wengeza isikhathi sokuhola esingacindezelwa.

Uma umklamo wakho une-BGA yephimbo engu-0.50mm edinga ama-vias angaboni e-L1→L2 kuphela ukuze kuphunywe, futhi umzila wangaphakathi uphela ku-core ejwayelekile, Uhlobo I lwanele futhi ukukhetha okufanele kwezomnotho. Uma lowo mklamo ofanayo une-BGA yephimbo engu-0.40mm lapho i-via-in-pad iphoqelekile futhi isignali eyodwa ebalulekile kumele idlule kusuka phezulu iye ku-L3 ngqo, Uhlobo II luyadingeka - futhi ukuthola lokhu ngesikhathi sokuqedwa kokuhlelwa kunokuba kuqale kuyiphutha.

Ama-Microvia Ahlanganisiwe vs. Ahlanganisiwe: Ukwehluka kwedatha nokuklama okuthembekile

Uma indlela yesignali kufanele idlule ezingqimbeni ezimbili ze-dielectric ezakhelwe ngaphakathi — isibonelo, kusukela ku-L1 kuya ku-L3 ekwakhiweni kohlobo lwesibili — ama-vias amabili axhumanisa i-L1→L2 kanye ne-L2→L3 angahlelwa noma abekwe ndawonye.

I-Staggered: Ama-vias amabili ahlukaniswe ngokuvundlile ngo-≥0.20mm ukusuka phakathi kuya phakathi. Ngayinye ihlala ku-capture pad yayo. I-intermediate pad (L2) kumele ibe nosayizi ukuze ivumelane neringi ephezulu nge-annular kanye nomkhondo womzila oxhumanisa ne-via engezansi. Akukho ukugcwaliswa kwethusi okudingekayo. Lokhu ukukhetha okuzenzakalelayo — izindleko eziphansi, ukuthembeka okuphezulu, ukukhiqizwa okulula.

Okuhlanganisiwe: Womabili ama-vias abelana ngezixhumanisi ze-X/Y ezifanayo. I-via engezansi (L2→L3) kumele igcwaliswe ngethusi futhi ihlelwe nge-CMP ngaphambi kokuba i-buildup engenhla ifakwe i-laminate, ngoba i-via engenhla (L1→L2) ibholwa ngqo ebusweni bokugcwalisa obuhleliwe. Kudingeka kuphela ngaphansi kwama-array e-BGA aminyene kakhulu lapho i-offset evundlile engu-0.20mm ingatholakali ngokwejiyometri.

Idatha eqoqwe kuze kube manje iphakamisa ukuthi ama-microvia ahlanganisiwe anezingqimba ezintathu noma ngaphezulu zama-microvia anamathuba amaningi okubhekana nokwehluleka kunezakhiwo ezihlanganisiwe. Kuma-via ahlanganisiwe anezingqimba ezimbili, ukuthembeka kuncike kakhulu kwikhwalithi yokugcwalisa:

Ukucaciswa kwe-void kubalulekile ngoba ama-voids agxila ekucindezelekeni kokushisa emngceleni we-void ngesikhathi sokuhamba ngebhayisikili. I-stacked via enendawo ye-void engu-20% izohluleka engxenyeni encane yemijikelezo yesakhiwo esifanayo esihlanganisiwe - futhi ukwehluleka kudlula ukuhlolwa kukagesi kokuqala. Njalo qinisekisa nomkhiqizi ukuthi basebenzisa i-bottom-up pulse-plating chemistry (hhayi i-comformal electroplating ejwayelekile) ye-via fill. I-standard conformal plating ivala ukuvulwa kwe-via ngaphambi kokugcwalisa isikhungo, ikhiqize ama-voids angu-20-40% njalo. I-bottom-up chemistry igcwalisa kusukela ku-stop pad kuya phezulu, ifinyelela njalo ku-≤8%.

Ngaphambi kokuzibophezela kuma-stacked vias, qala ngokuqondisa umklamo ngama-stacked vias. Imiklamo eminingi okucatshangwa ukuthi idinga i-stacked ingafinyelela ukucushwa kwe-stagged nge-fanout space eyengeziwe engu-5–8%. Izindleko, ukuthembeka, kanye nomehluko wengozi yokukhiqiza mkhulu kakhulu.

Izindleko Zokusebenzisa I-PCB Ezingaboni: Abashayeli, Ama-Multiplier, kanye Nalokho Abaklami Abangakulawula

Kungani I-Premium Yezindleko Inkulu Kunalokho Okushiwo Ukubalwa Kwezingqimba

Intengo ephezulu ye-blind nge-PCB iqhutshwa ubunzima benqubo kanye nengozi yokukhiqiza ehlanganisiwe, hhayi ngezindleko zezinto ezibonakalayo. Umjikelezo ngamunye we-lamination unezela amahora angu-8-12 wesikhathi senqubo esingacindezelwa - umjikelezo wokucindezela, ukuhlala kahle, kanye nokulawula ukupholisa - kanye nokuhlolwa phakathi kwemijikelezo, ukuqinisekiswa kokubhaliswa, kanye nokwenzeka kokususa iphaneli nganoma yisiphi isikhathi. Ukwakhiwa kohlobo lwesithathu olunemijikelezo emine ye-lamination akubizi ama-4 × ibhodi elijwayelekile lomjikelezo owodwa; kubiza kakhulu ngoba umjikelezo ngamunye unamathuba angu-1-3% okwehluleka kwenqubo, futhi lawo mathuba ayanda: kuyo yonke imijikelezo emine, amathuba okungenani okwehluleka kwezinga lomjikelezo owodwa asondela ku-4-12%.

Izindleko ezintathu zenqubo zingu-50–65% wezindleko zeyunithi iyonke:

• Lamination cycles: Isikhathi esingaphansi esingacindezelwa ngomjikelezo ngamunye singamahora angu-8-12. Ukwakhiwa kohlobo lwesithathu olunemijikelezo emine kunesikhathi senqubo ye-lamination okungenani samahora angu-32-48 ngaphambi kwanoma yikuphi ukubhoboza, ukupenda, noma ukuthwebula izithombe. Yilapho isikhathi sokuhola kanye nezindleko kuvela khona kokubili.
• Ukubhoboza nge-laser: Izindleko zokusetha iphaneli ngayinye zingu-$80–250 kungakhathaliseki ukuthi zingakanani, kanye no-$0.008–0.025/nge-CO₂ noma u-$0.015–0.040/nge-UV laser. Ephanelini elinama-blind vias angu-600, ukubhoboza kukodwa kunezela u-$35–75/ngephaneli.
• Ukugcwaliswa kwethusi kanye nokuhlela kwe-CMP: Kudingeka kuma-vias ahlanganisiwe kanye ne-via-in-pad. Ukugcwalisa kunezela u-$0.05–0.15/nge; i-CMP planarization inezela u-$1.50–5.00/ngephaneli. Kumklamo we-600-via osebenzisa ama-vias ahlanganisiwe uma kuqhathaniswa ne-staggered, lo mehluko uwodwa ungafinyelela u-$30–95/ngebhodi.

Izinqumo Ezine Zokuklama Ezinciphisa Izindleko Ngaphandle Kokuyekethisa Ukusebenza

• Sebenzisa uhlobo lwe-HDI oluphansi kakhulu olufeza umzila wakho. Uhlobo I kuya kuhlobo III luyi-2–3× cost multiplier ku-HDI premium, singabali ukubhoboza nge-laser kanye nokugcwalisa. Uma yonke i-BGA fanout ifinyelela ekuxhumaneni kwe-L1→L2, Uhlobo I lwanele.
• Cacisa ama-microvia ahlanganisiwe noma kuphi lapho umzila uvumela khona. I-Staggered isusa umjikelezo wokugcwalisa ithusi kanye ne-CMP ngokuphelele. Kuma-via angu-600 ngephaneli, lokhu kungumehluko wama-$30-95 ezindleko zokucubungula ngebhodi ngalinye, kanye nokuthembeka okungcono.
• Sebenzisa ama-vias angu-0.15mm esikhundleni sika-0.10mm lapho iphimbo livuma khona. Ku-pitch engu-0.50mm BGA, ama-vias angu-0.15mm ayasebenza ngokwejiyometri futhi abiza kancane ngo-40% nge-vi ekubholeni, isivuno singaphezu kuka-99% uma kuqhathaniswa no-97–98% ku-0.10mm, futhi anezilinganiso zobukhulu obungcono ngokwemvelo. Akukho ukushintshana ngogesi.
• Cacisa i-prepreg engu-1080 ezingqimbeni zokwakheka kwe-HDI. I-1080 ekujikeni okungu-65–70µm okulungisiwe kunciphisa isilinganiso sesici kusuka ku-1.1–1.3:1 (2116 prepreg) kuya ku-0.65:1 — kuthuthukisa isivuno sokuqala, kunciphisa izindleko zokubhoboza, kanye nokuthuthukisa ukuthembeka kwensimu. Izindleko zezinto ziyafana.

Ukuhlola Umkhiqizi We-PCB Ongaboni: Imibuzo Eveza Amandla

Imibuzo Yokukwazi Ukucubungula

Ubuchwepheshe be-HDI blind ngokusebenzisa ukwenziwa budinga imishini ekhethekile kanye nokuzithiba kwenqubo abakhiqizi abaningi be-PCB abangenayo ngempela. Le mibuzo ihlukanisa izitolo ezinekhono langempela kulezo ezizoba nzima ngomthamo:

• "Yiziphi izinhlobo ze-HDI ozenzayo ngaphakathi endlini, futhi inani lomjikelezo we-lamination lingakanani kulowo nalowo?" Umkhiqizi onekhono uqamba uHlobo I, II, III, kanye nanoma yiluphi ungqimba olunezibalo zomjikelezo ezihlobene. Impendulo engacacile — “senza i-HDI” noma “sisekela ama-vias angaboni” — ngaphandle kwemininingwane yenqubo ikhombisa ukuthi kungenzeka ukuthi banikeza imisebenzi yokwakha eyinkimbinkimbi noma banolwazi olulinganiselwe ngezinto ezingaphezu koHlobo I.
• "Ingakanani i-blind yakho encane eqediwe nge-diameter ku-CO₂ kanye ne-UV laser ngokwehlukana?" I-CO₂ engu-0.10mm iyikhono lokukhiqiza elijwayelekile. I-laser ye-UV engu-0.075mm ikhombisa imishini ethuthukisiwe kakhulu. Noma yini eshiwo ngaphansi kuka-0.075mm kufanele iqinisekiswe ngedatha yesigaba esihlukile, njengoba lokhu kuyikhono elikhethekile eligcinwe ngokuthembekile ezitolo ezimbalwa ekukhiqizeni.
• "Iyini ukunemba kwakho okuvamile kokubhaliswa kwesendlalelo kuya kwesendlalelo ngemva komjikelezo wesibili we-lamination?" Inombolo okufanele uyiqhathanise ne: ±35–50µm iyikhono elijwayelekile eliqinile. ±25–30µm ithuthukisiwe. Umenzi ongakwazi ukuphendula lokhu ngezinombolo akanalo ukuqapha kokulawula inqubo ukuze abambe ngokuthembekile ama-land pad angu-0.30mm kuma-blind vias angu-0.10mm ekukhiqizweni.
• "Yiliphi iphesenti lokungabi nalutho olibambayo kuma-vias agcwele ithusi, futhi usebenzisa yiphi ikhemistri yokugcwalisa?" Impendulo efanele: ≤10% i-void nge-IPC-6012 ngayinye, ihlose ≤8%, isebenzisa i-bottom-up pulse-plating chemistry. Isitolo esisebenzisa i-comformal electroplating ejwayelekile yokugcwalisa sizokhiqiza i-voids engu-20–40% — ehambisana nesakhiwo ngokuhlolwa okungahleliwe, engathembekile ekujikelezeni kokushisa.
• "Ubhekana kanjani nokwephulwa kwemithetho yokungaboni ngokusebenzisa i-layer-pair ekubuyekezweni kwe-DFM?" Isitolo esiqinile sibonisa amafulegi athile ngamabhangqa anezixhumanisi, sikhomba uhlobo lokwakha oludingekayo ukuxazulula ukwephulwa, bese sibuyisela lokhu kumklami zingakapheli amahora angama-24. Isitolo esidlulisa imiklamo engenakwenzeka ngamabhangqa ekukhiqizeni - noma esixazulula ukwephulwa ngokufaka uhlobo lokwakha ngaphandle kwesaziso - sidala ukwehluleka kwensimu.

Izidingo Zemibhalo Yezinhlelo Zokukhiqiza

Kunoma yiluphi uhlelo lwe-PCB olungaboni ngaphandle kobuningi beprototype, dinga lokhu njengokulethwa okujwayelekile:

• Amarekhodi okuhlola phakathi kwemijikelezo: Ukulinganiswa kokubhaliswa kwe-X-ray kanye nokumapha ubukhulu bephaneli phakathi komjikelezo ngamunye we-lamination — hhayi ngokwesisekelo sesampula, kodwa ngamaphaneli ayi-100%
• Imibiko yekhuphoni ye-TDR impedance: amanani e-impedance alinganisiwe akhethekile anamarekhodi e-waveform, hhayi amadokhumenti ajwayelekile enqubo
• Isigaba sokuqala: isigaba esincane kakhulu se-vis ezingabonakali eziqinisekisa ukujiya kwe-copper plating edolweni (ubuncane be-IPC-6012 Class 3: 12µm), iphesenti elingenalutho, kanye nokubhaliswa kwephedi yokubamba
• Ukulandeleka kwezindawo zezinto ezibonakalayo: indawo yokulungiselela kusengaphambili, indawo ye-copper foil, kanye nendawo eyinhloko ye-laminate exhunywe kumhambi wokukhiqiza ukuze kuhlaziywe ukwehluleka kwensimu

Ikhono Lokusebenzisa I-PCB Eliyimpumputhe le-Highleap

I-Highleap Electronics idala ama-blind ngokusebenzisa ama-PCB kusukela ku-Type I kuya ku-Type III kanye ne-anylayer HDI ngezilinganiso zokukhiqiza ezilandelayo eziqinisekisiwe:

• Amasistimu we-Laser: I-CO₂ (ububanzi obungu-0.10mm obuqediwe, i-FR4 kanye nama-laminate ajwayelekile); i-UV (ubuningi obungu-0.075mm, i-laminate ekhethekile ephansi, i-PTFE, ihambisana ne-Megtron 6/7)
• Ngokugcwalisa: I-chemistry ye-pulse-plating engezansi phezulu; imininingwane engenalutho ≤8%; i-CMP planarization ibe yi-≤15µm surface protrusion
• Ukubhaliswa: ±35µm ejwayelekile kusukela kungqimba kuya kungqimba ngemva komjikelezo wesibili we-lamination; Ukuhlolwa kokubhaliswa kwe-X-ray okungu-100% kuzo zonke iziphaneli phakathi kwemijikelezo
• I-DFM: Ukuqinisekiswa kwe-layer-pair okungaboni kahle kanye nokuhlolwa kwesilinganiso se-aspect ratio kukho konke ukucashunwa kwe-HDI — ama-layer pair angenakwenzeka abuyiswa nesiqondiso esithile sokulungisa zingakapheli amahora angu-24
• Amadokhumenti: Imibiko yekhuphoni ye-TDR ngesabelo ngasinye, amarekhodi okuhlolwa phakathi kwemijikelezo, kanye nokulandelelwa kwesabelo sezinto ezibonakalayo njengokujwayelekile kokuthunyelwa okulethwayo
• Ikhono lokwakha: Uhlobo I kuya kuhlobo III; i-anylayer HDI kuze kufike ezingqimbeni ezine ezihlanganisiwe ngobuso; ama-hybrid e-HDI aqinile

Ukuze uthole inqubo ephelele yokubopha i-lamination — kufaka phakathi amapharamitha omjikelezo wokucindezela, iphrothokholi yokuhlola phakathi kwemijikelezo, izimbangela zesici, kanye nedatha yokukhiqiza ngohlobo lokwakha — bheka i- blind nge-PCB lamination kanye nomhlahlandlela wokuvimbela isiphambeko.

Thola Impumputhe Yakho Nge-PCB Ecashuniwe