Indlela Yokubona I-PCB Esezingeni Eliphezulu: Umhlahlandlela Ogcwele Wokuhlola

I. Ukuhlolwa Kwesigaba Sokuklama (i-DFM/i-DFA)

Inhloso Eyinhloko: Thola amaphutha okuklama kusenesikhathi ukuze unciphise izingozi zokushintsha umkhiqizo.

1. Ukuqinisekiswa Komklamo Wokusebenza Kagesi

• Ukufaniswa kwe-Impedance: Ukuvinjelwa okuphawulekayo kwemigqa yokudlulisa isignali yesivinini esikhulu (isb., i-USB, i-HDMI, imigqa ye-RF) kumele kuhlangabezane nezidingo zomklamo (isb., i-50Ω eyodwa, i-differential 90Ω). Amathuluzi okulingisa e-SI (isb., i-HyperLynx) asetshenziselwa ukugwema ukubonakaliswa kwesignali kanye nokuncipha kwayo.
• Ubuqotho Besignali: Hlola ukuthi kukhona yini ukuxoxa nge-cross-talk, ukubambezeleka, kanye nobuqotho bamandla (PI) ukuqinisekisa ukuthi amasignali avame kakhulu awaphazamiseki. Gcina ukuhlangana okuhle kwamandla/indiza yomhlabathi ukuze unciphise imisebe ye-EMI.
• Umklamo Wokuqoqwa Kwezingqimba: Qinisekisa ukujiya kwesendlalelo sokushisa, inani lesendlalelo sethusi, kanye nokuhleleka kokuhlanganisa ukuze kulinganiswe ukushabalaliswa kokushisa kanye nokulawulwa kokungangenisi umoya, kuhlangatshezwane nezidingo ze-EMC.

2. Ukuhlolwa Kwemithetho Yokwenziwa (i-DFM)

• Amapharamitha Okulandelela: Ububanzi/isikhala esincane sokulandelela ≥3mil (1mil ye-HDI), ibhuloho lemaski elihlanganisiwe ≥4mil.
• Ububanzi bembobo kanye nephedi: Kunconywa nge-0.3mm, iphedi engu-0.6mm ukuvimbela ukuphambuka kokubhoboza noma ukuhlukana kwephedi.
• Umklamo Wokujiya Kwethusi: Ama-trace kagesi asebenzisa i-1oz–2oz (35–70μm) ukuhlangabezana nomthwalo wamanje nokuvimbela ukushisa ngokweqile.

3. Ukuzivumelanisa Nesimo Semishini

• Uhlaka, izimbobo, kanye nezikhala kufanelana nokubekezelelana kwendawo ebiyelwe (± 0.1mm).
• Izingxenye ezizwela ukushisa zihlukaniswe nezingxenye ezikhiqiza ukushisa ezinezindlela zokungenisa umoya.
• Izimpawu ze-polarity kumele zicace kuma-capacitor nama-IC.

II. Ukuqapha Ikhwalithi Ekukhiqizweni

Inhloso Eyinhloko: Ukulawulwa kwesikhathi sangempela kokuphambuka kwenqubo ukuqinisekisa ukuhambisana nenqubo.

1. Ukuhlolwa kwe-Substrate kanye nezinto ezibonakalayo

• Hlola uhlobo lwezinto (FR-4, Rogers, PI), ukujiya (±5%), kanye nokuba lukhuni kwethusi.
• Umphezulu kufanele ungabi nokuklwebheka, ungabi nokushiswa, ungabi nokuqhekeka.

2. Inqubo Yokubhoboza Ne-Vias

• Ukunemba Kobubanzi Bembobo: Ukubekezelelana ±5%, izindonga zemigodi ehlanzekile, akukho maqhubu noma i-smear.
• Ukwenziwa Kwensimbi Kwembobo: Ithusi elingena-electron ≥0.5μm, ithusi elifakwe insimbi ≥20μm (IPC-6012 Class 3).

3. Ukuthwebula Izithombe Nokuqopha

• Ukuphambuka kokubhalisa ≤5mil, ububanzi bomkhondo bufana, ithusi elisele ≤1%.
• Isikrini sesilika sicacile, silinganiselwe ≤10mil, sinamathela kahle.

4. Ukuhlolwa Kokuqedwa Komphezulu

• NGIYAVUMA: I-Nickel 3–5μm, igolide 0.05–0.1μm, ayikho i-pad emnyama.
• UMnyango Womlilo Wokuzithandela: Ukwemboza okungu-0.2–0.5μm, ukungcoliswa kwe-ion okungu-≤1.56μg/cm².
• I-HASL: Ubukhulu ≥2.5μm, indawo ebushelelezi, ≥95% ukumanzisa kwe-solder.

5. Ukulawulwa kwe-Lamination kanye ne-Impedance

• Ukuphambuka kokubhalisa ≤10mil, ubukhulu be-dielectric obulinganayo, akukho mabhamuza noma ukuhlukanisa.
• Ukuphazamiseka kwesignali okubalulekile ngaphakathi kuka-±10%, okuqinisekiswe yi-TDR.

III. Ukuhlolwa Kokusebenza Komkhiqizo Oqediwe kanye Nokwethenjelwa

Inhloso Eyinhloko: Qinisekisa ukusebenza kukagesi kwe-PCB kanye nokuzinza kwesikhathi eside.

1. Ukuhlolwa Kokusebenza Kukagesi

• Ukuqhubeka ≤5mΩ, ukuvikela ≥10⁹Ω @500V DC.
• Hlola ukulahlekelwa kokufakwa (≤3dB @5GHz) kanye nokulahlekelwa kokubuyiselwa kwemiklamo yesivinini esikhulu.

2. Ukuhlolwa Kokuthembeka

• Ukushaqeka Okushisayo: 260°C, ukucwiliswa kwemizuzwana eyi-10, akukho ukuqhekeka noma ukuqhumisa.
• Ukumelana Ne-Dielectric: I-500V DC umzuzu owodwa, akukho ukuphazamiseka.
• Ukuthengiseka: 245°C imizuzwana emi-3–5, ≥95% ukumanzisa.

3. Ukuhlolwa Okubonakalayo Nokulinganayo

• I-AOI yamasekethe amafushane/avulekile, imaski yomshini wokusoda, i-oxidation.
• Uhlaka ± 0.1mm, imbobo ± 0.05mm, ubukhulu be-lamination ≤ ± 10%.

4. Ukuhlolwa Okuthuthukisiwe Kwesakhiwo

• Ubukhulu Bokugoqa: I-XRF ukuhlola izendlalelo zethusi negolide/i-nickel.
• Isigaba esiphambanayo: Ukuhlola okubonakalayo kobukhulu besendlalelo, ukunamathela, kanye nokwakheka kwensimbi odongeni lwembobo.

IV. Isimo Esikhethekile Ukuhlolwa Okwengeziwe

1. Ama-PCB Anemvamisa Ephakeme/Esivinini Esiphezulu

• Isihlaziyi senethiwekhi samapharamitha e-S: ukulahleka kwesiginali ≤3dB @≥5GHz, iphutha le-impedance ≤±8%.

2. Ama-PCB Aguquguqukayo/Aqinile-Aguquguqukayo

• Ukuhlolwa Kokugoba: Imijikelezo eyi-100,000 @R≤2mm, akukho mifantu.
• Amandla Okusebenza: Akukho ukuhlukaniswa kwezindawo eziqinile.

3. Ama-PCB ezimoto/ezokwelapha/e-Aerospace-Grade

• Hlangana ne-IPC-A-600 Class 3, UL, RoHS/REACH, ukumelana nomlilo we-V-0.

V. Amathuluzi Okuhlola kanye Nezindinganiso Zemboni