Umklamo we-PCBA uvame ukuqala ngokuthi Ukuthwebula Okuhleliwe, ulandelwa ngu Ukubekwa kwe-PCB, Umzila, I-DRC (Ukuhlolwa Kwemithetho Yokuklama), futhi Ukuhlolwa kwe-DFM, bese kuba nemiphumela Amafayela e-Gerber, Amafayela e-NC Drill, I-BOM (Umqulu Wezinto Ezisetshenziswayo), futhi Umdwebo Wokuhlanganisa. Ngemiklamo eyinkimbinkimbi, I-HDI PCB ubuchwepheshe obune ama-microvia abhobozwe nge-laser futhi i-lamination elandelanayo kungadingeka.

Amafayela okufaka ayinhloko afaka:

• Uhlu lwe-Netlist
• Umdwebo Wemishini
• Ishidi Ledatha Lengxenye
• Idokhumenti Yokwazi Inqubo (ububanzi/isikhala esincane sokulandelela, usayizi omncane womgodi, ububanzi bedamu lemaski yomshini wokusolda, izidingo zokulawula ukuvinjelwa)

Amafayela okukhipha ayinhloko afaka:

• I-Gerber RS-274X noma I-ODB++
• Ifayela le-NC Drill
• Ifayela Lokukhetha Nokubeka
• I-Stencil Gerber
• Umbiko Wephuzu Lokuhlola
• Umdwebo Wokuhlanganisa kanye Nefayela Lesikrini Sesilika

2.1 Izimiso Zokubeka

Ukubekwa kuyisisekelo somklamo we-PCBA futhi kuthinta ngqo Ikhwalithi Yokuqondisa Isignali, Ukusebenza Kokushisa, futhi UkwenziwaUkubekwa kahle kubalulekile i-PCB yokulawula ukuvimba imiklamo kanye namasekethe edijithali asheshayo.

• Ukuhlukaniswa Okusebenzayo: Hlukanisa izindawo ze-interface ze-analog, zedijithali, zamandla, kanye nesivinini esikhulu ukuze ugweme ukuphazamiseka.
• Ukugeleza Kwesignali: Beka izingxenye ohlangothini lokugeleza kwesignali ukuze unciphise indawo yokuwela kanye nendawo yokujikeleza.
• Okubalulekile Kwengxenye Ebalulekile: Beka kuqala amamojula e-MCU/FPGA/SoC, DDR, iwashi, kanye namandla.
• Ukubekwa Komphetho: Izixhumi, izinkinobho, nama-LED eduze kwemiphetho yamabhodi ukuze kuhlangatshezwane nezidingo zemishini.
• Isakhiwo Sokushisa: Izingxenye ezinamandla aphezulu eduze kweziteshi zokusabalalisa ukushisa noma ama-thermal pad; engeza ukushisa ngama-array ngaphansi kwezingxenye ezishisayo.

2.2 Izinto Ezibalulekile Zokuhambisa Umzila

• Ububanzi Bokulandelela kanye Nomthamo Wamanje: ububanzi bomkhondo obungu-0.5 mm ku-1 oz yethusi ithwala cishe i-1 A. Ukuze uthole amandla aphezulu, sebenzisa ithusi noma izisindo zethusi ezijiyile.
• I-Differential Pair: I-USB, i-HDMI, i-LVDS, i-Ethernet iyadingeka Ukufanisa Ubude, Isikhala Esilinganayo, futhi Ukuxhuma Okuqinile ukulondoloza ubuqotho besiginali futhi unciphise ukulahlekelwa kokufakwa futhi ukulahlekelwa kokubuyiselwa.
• Ukuphazamiseka Okulawulwayo: Amasignali esivinini esiphezulu adinga i-impedance ephawulekayo ebalwa kusukela ekuhlanganisweni; amanani avamile angama-50 Ω anesiphetho esisodwa kanye nomehluko we-100 Ω. Ukubuyekezwa kobunjiniyela kufanele kufake phakathi ukulawula ukuvimba ukuqinisekiswa.
• Indlela Yokubuya: Qinisekisa ukuthi indiza ephelele yokubhekisela igweme izinkinga ze-EMI yendiza ehlukanisiwe; engeza ama-vias okuthunga eduze kokuguquka kwezendlalelo.
• Nge-Via: Nciphisa ama-vias anesivinini esikhulu; sebenzisa Ukubhoboza Emuva noma Izindwangu Ezingaboni/Ezingcwatshwe uma kudingeka. Kumadizayini e-HDI, sebenzisa ama-vias ahlanganisiwe noma ama-via ahlanganisiwe nge ukugcwaliswa kwethusi.

I-DFM embi iholela ku Ukubopha i-Solder, Ukutshelwa ngamatshe ethuneni, Amajoyinti e-Cold Solder, Ushintsho Lwengxenye, futhi Amabhola e-SolderUkuhlaziywa kwe-DFM ngaphambi kokukhiqizwa ngobuningi kusiza ukuvikela isivuno sokuqala.

3.1 Umklamo Wephethini Lomhlaba

Amaphethini omhlaba kumele ahambisane I-IPC-7351Ukwakheka kwephedi efanele kubalulekile ukuze kube nokwethenjelwa Umhlangano we-PCB futhi Umhlangano we-PCBA.

• Izingxenye ze-CHIP (0402, 0603, 0805): Usayizi wephedi kumele uhambisane nokuvulwa kwe-stencil kanye nephrofayili yokugeleza kabusha ukuze kugwenywe ukuthunjwa ngamatshe.
• I-QFN (I-Quad Flat No-lead): Iphansi Iphedi Yokushisa kufanele ihlukaniswe ukuze kuncishiswe ukugoba kanye nokubanda kwamalunga; sebenzisa imaski yesolder echazwe (i-SMD) noma imaski engadayisi echazwe (NSMD) ama-pads ngokufanele.
• I-BGA (i-Ball Grid Array): Ububanzi bephedi ngokuvamile bungu-80–85% wobubanzi bebhola; ukuvulwa kwemaski yesolder kumele kube okuqondile ukuze kugwenywe imaski yesolder ephepheni. Ukuze uthole i-BGA ebukhali, sebenzisa idamu lemaski elidayisiwe ububanzi obungu-≤0.1 mm noma ususe idamu uma kudingeka.
• I-SOT/SOP/QFP: Iphimbo elincane lidinga ububanzi obanele bedamu lemaski yokusongelwa ukuze kuvinjelwe ukuvalwa.

3.2 Isikhala Nokuqondiswa Kwezingxenye

• Isikhala sezingxenye eziseduze kumele sihlangabezane nezidingo zomlomo wokukhetha nokubeka kanye nokulungisa kabusha (≥0.3 mm).
• Hlanganisa izingxenye ezifanayo ngendlela efanayo ukuze kube lula ukuhlola i-AOI.
• Gcina ibanga elanele phakathi kwezingxenye ezinde nezifushane ukuze ugweme umphumela wesithunzi ngesikhathi sokugeleza kabusha.

3.3 Imaski Yokusonga kanye Nesikrini Sesilika

• Idamu Lemaski Lesolder ububanzi ≥0.1 mm ukuvimbela ukubopha.
• Isikrini sesilika Akufanele kudlule amaphedi; gcina isikhala esingu-≥0.2 mm.
• Ukumaka kwe-Polarity, Isikhombisi se-Pin 1, futhi Umklami Wezinkomba kumele kucace.
• Khetha umbala wemaski we-solder (oluhlaza okotshani, oluhlaza okwesibhakabhaka, omnyama, obomvu, omhlophe) ngokusekelwe kulokho okuthandwa yikhasimende; qinisekisa ukuthi ukuphrinta kwe-legend kuyafundeka.

4.1 DFT

I-DFT ivumela ukuhlolwa kwe-PCBA okuphumelelayo nokungabizi kakhulu futhi isekela ukuthuthukiswa kohlelo lokuhlola kanye nokwakhiwa kwemishini.

• Ukuhlolwa Kokuhlola Okundizayo: Akukho mishini edingekayo; ilungele ama-prototypes kanye nama-batches amancane.
• I-ICT (Ukuhlolwa Kwangaphakathi Kwesekethe): Idinga amaphuzu okuhlola kanye nomshini; ifaneleka kakhulu. Siyaklama amaphethini wamaphuzu okuhlola ngokumbozwa okwanele.
• I-FCT (Ukuhlolwa Kwesekethe Esebenzayo): Iqinisekisa ukusebenza kwangempela kwe-PCBA.
• Ukuskena Komngcele (i-JTAG): Isebenzisa i-logic yokuhlolwa kwe-chip eyakhelwe ngaphakathi ukunciphisa amaphuzu okuhlolwa angokoqobo.

Izidingo ze-DFT:

• Ububanzi bephuzu lokuhlola ≥0.8 mm, isikhala ≥1.27 mm.
• Sabalalisa amaphuzu okuhlola ohlangothini olulodwa uma kungenzeka.
• Gcina amaphuzu okuhlola engaphazanyiswa futhi kude nezingxenye ezinde.
• Gcina izindawo zokuhlola ukuze uthole amanethi kagesi kanye nomhlabathi ukuze ukwazi ukusebenza isivivinyo esifushane sokuvala amandla futhi ukulinganiswa kwe-voltage yamandla.

4.2 I-DFA

I-DFA igxile ekusebenzeni kahle kokuhlanganiswa kanye nokuvimbela amaphutha.

• Ukufakwa kwamaphaneli: Sebenzisa Ukusika okungu-V (Ukufaka amagoli angu-V) noma Ukulunywa Yigundane/Imbobo Yesitembu. Ngoba umhlangano we-pcb ngezingxenye ezilenga emaphethelweni, sebenzisa ukuqondisa amathebhu ngokulunywa yigundane.
• Isitimela Sokwenza Amathuluzi: ububanzi obungu-3–5 mm bokudlulisa nokubeka i-conveyor.
• I-Fiducial MarkOkungenani ama-fiducial omhlaba wonke angu-2-3; ama-fiducial endawo amadivayisi anciphile njenge-BGA ne-QFN.
• I-Poka-Yoke: Qinisekisa ukuthi izixhumi zinendlela ehlukile yokuvimbela ukufakwa okuphambene.

5.1 Ubuqotho Besignali (SI)

Izinkinga ze-SI zifaka phakathi Ukuzindla, Ukuxoxa nge-Crosstalk, Ukudubula ngokweqile, I-Undershoot, futhi Isikhathi Sokulinganisa. Ijubane eliphezulu Umklamo we-PCB angasebenzisa ukulingisa kusengaphambili kwesakhiwo futhi ukuqinisekiswa kwangemva kwesakhiwo ukuhlola umdwebo wamehlo.

• Ukufaniswa kwe-Impedance: Ukuphela kochungechunge lomthombo, ukupheliswa okuhambisanayo, noma ukupheliswa kwe-AC.
• Ukufanisa Ubude: Ukuqondisa i-Serpentine kwamaqembu edatha/amakheli e-DDR kanye nama-differential pairs.
• Ukucindezelwa Kwe-Crosstalk: Umthetho we-3W (isikhala esingu-≥3× ububanzi bomkhondo); engeza imikhondo yokuvikela yezibonakaliso ezibalulekile.
• Buyisela nge-: Faka ama-vias okuthunga eduze kokushintsha kwezendlalelo ukuze unciphise ukungena kwe-loop.

5.2 Ubuqotho Bamandla (PI)

Izinkinga ze-PI zifaka phakathi Umsindo Wamandla, Ukwehla Kwe-Voltage, futhi Ukugxuma Emhlabeni. Idizayiniwe kahle Inethiwekhi Yokusabalalisa Amandla (i-PDN) kubalulekile ekusebenzeni okuzinzile.

• I-Decoupling Capacitor: Beka inhlanganisela engu-0.1 µF + 10 µF eduze kwephini ngayinye yamandla; sebenzisa ama-capacitor aphansi e-ESL ukuhlukanisa okuvamise kakhulu.
• Ukuhlukaniswa Kwendiza Yamandla: Hlukanisa izindiza zamandla ze-analog nezedijithali; gwema ukuwela ukwahlukana ngamasignali esivinini esikhulu.
• Indlela Yokuvimbela Okuphansi: Amandla kagesi aseduze kanye nezindiza zomhlabathi zakha amandla endiza; zigcina i-dielectric encane phakathi kwamandla kanye nezendlalelo zomhlabathi.
• Nge-Count: Ama-via amaningi ahambisanayo emizileni yamandla aphezulu; sebenzisa ama-via agcwele ithusi ukuze uthole ama-via anomoya ophezulu.

5.3 EMC (Ukuhambisana Kwama-Electromagnetic)

Izembozo ze-EMC I-EMI (Ukuphazamiseka Kwama-Electromagnetic) futhi I-EMS (Ukuzwela Kwama-Electromagnetic)Ukubuyekezwa kokuhambisana kwe-EMC kungakhomba izingozi zomklamo ngaphambi kokuhlolwa okusemthethweni.

• Umthetho wamahora angu-20: Imiphetho yendiza yamandla okubuyela emuva ngesikhala esingu-20× ukuze kuncishiswe amasimu okugoba.
• Ukuhlunga kwe-Interface: Engeza ama-TVS, ama-common mode choke, ama-ferrite beads, nama-capacitor kuzixhumi ze-I/O.
• UkuvikelaSebenzisa izembozo zokuvikela ezindaweni ezibucayi; hlinzeka amaphedi okufaka umhlabathi ukuze kunamathiselwe isihlangu.
• I-Crystal & Clock: Akukho ukuqondisa ngaphansi kwamakristalu; sebenzisa ama-guard traces futhi ugcine ama-clock traces amafushane.

5.4 Umklamo we-HDI PCB

Ngemiklamo yabantu abaningi, I-HDI PCB ubuchwepheshe obune ama-microvia abhobozwe nge-laser, ama-vias angaboni, futhi ama-via angcwatshwe kwenza kube nezici ezincane zefomu kanye nokuminyana okuphezulu komzila. Izinto ezibalulekile okufanele uzicabangele:

• Isilinganiso se-Microvia ngokuvamile ≤1:1.
• Sebenzisa ama-microvia ahlanganisiwe ngokushintsha kwezingqimba ezindaweni ezinabantu abaningi.
• Ukubopha okulandelanayo inqubo ivumela izendlalelo eziningi ze-microvia.
• Nge-in-pad nge ukugcwaliswa kwethusi futhi ukuhlela ye-BGA fanout.

6.1 Umklamo we-BGA

Ukwakheka kwephedi ye-BGA kuthinta ngqo isivuno sokugoqa se-soldering Umhlangano we-PCB futhi Umhlangano we-PCBA, ikakhulukazi ezinhlelweni zokusebenza ze-BGA ezisezingeni eliphansi.

• Ububanzi bephedi ≈0.8–0.85× ububanzi bebhola (isb., iphedi engu-0.25 mm yebhola engu-0.3 mm).
• Ukuvulwa kwemaski okuhlanganisiwe okukhulu kunephedi ngo-0.025–0.05 mm ohlangothini ngalunye.
• I-NSMD (I-Non-Solder Mask Echazwe) noma I-SMD (I-Solder Mask Echazwe); I-NSMD evamile ye-BGA ephithizela kahle.
• Ama-Fanout vias angu-0.2 mm/0.1 mm noma ngaphansi; sebenzisa I-Via-in-Pad nge Ithusi Eligcwele / Eligcwele i-Resin ukuvimbela ukugoba kwe-solder.
• Engeza izimpawu zokwethembeka zendawo eduze kwe-BGA ukuze kubekwe kahle.

6.2 Umklamo we-QFN

Amaphakheji e-QFN (Quad Flat No-lead) adinga ukwakheka kwephedi yokushisa ngokucophelela.

• Hlukanisa i-thermal pad ibe ama-pad amaningi amancane noma usebenzise i-pad eyodwa enezimbobo ze-stencil ezihlukaniswe ngezigaba ukuze unciphise ukugoba.
• Nweba amaphinikhodi abe ngu-0.2–0.3 mm ngaphezu komphetho wephakheji ukuze kuhlolwe i-AOI.
• Sebenzisa Ukuxhuma i-Resin noma Ukugcwaliswa Kwethusi ukuze kuvikelwe ukugoba kwephedi yokushisa.
• Ukuze uthole i-QFN enamandla amakhulu, engeza ukushisa nge-array ukuxhuma ezindizeni zethusi zangaphakathi.

6.3 0402 / 0201 / 01005 Izingxenye Ezincane

• Isikhala samaphedi angu-0402: 0.4–0.5 mm; 0201: 0.25–0.3 mm; 01005: 0.15–0.2 mm.
• Sebenzisa izimbobo ze-stencil zebhola elilwa nokushisa (ezinama-notch noma ezincishisiwe).
• Nikeza amamaki anele okuqinisekisa ukunemba kokubekwa.
• Cabanga ukukhipha iglue ukuhlanganiswa okunezinhlangothi ezimbili okunezingxenye ezisindayo.

7.1 Umklamo Wembobo Yesitencili

Umklamo wokuvulwa kwe-stencil unquma ngqo ukuphrinta kokunamathisela kwe-solder ikhwalithi futhi kufanele ilungiselelwe i-PCBA ngayinye.

• Ubukhulu be-stencil: 0.1–0.15 mm evamile; 0.08 mm yezingxenye ezincane; 0.2 mm yamandla aphezulu.
• Isilinganiso Sendawo: Indawo yokuvula/indawo yodonga lwembobo > 0.66.
• Isilinganiso Sokubukeka: Ububanzi bembobo / ubukhulu bestencil > 1.5.
• Izimbobo Ezikhethekile: Iphedi yokushisa ye-QFN amafasitela amancane amaningi; Ukunciphisa okuyindilinga noma okuyisikwele kwe-BGA; izimbobo ezinamabhola angenaso isihlabathi zezingxenye ze-chip.
• Cabanga istencil yesinyathelo ngosayizi wezingxenye ezixubile (isb., i-stencil ejiyile yezindawo ezinomoya ophezulu, encane ye-pitch encane).

7.2 Ukugeleza Kabusha Nokushiswa Kwamagagasi

• Ukugoqa kabusha: Ngezingxenye ze-SMT; kudinga okufanele iphrofayili yezinga lokushisa (fudumeza kusengaphambili, cwilisa, phinda ugcwalise, upholise). Sebenzisa ukugeleza kabusha kwe-nitrogen ukuze kufakwe amanzi kangcono futhi kuncishiswe ukungcoliswa kwamanzi.
• Ukushisela Amagagasi: Ngezingxenye ze-through-hole (DIP) kanye nenqubo ye-SMT red glue.
• Ukushisela Amagagasi Okukhethayo: Ukushisela okwenziwe endaweni ethile kwezingxenye ezinezimbobo; kulungele amabhodi obuchwepheshe obuxubile.
• Inqubo Engenalo Umthofu: I-SAC305 solder paste; izinga lokushisa lokuphinda ligeleze phezulu lingu-235–250 °C. Ukuphela kwendawo okuvamile kufaka phakathi i-HASL engenalo i-lead, VUMELANA, UMnyango Womlilo Wokuzithandela, isiliva lokucwiliswa, futhi ithini lokucwilisa.

7.3 Ukuhlanganiswa Okuxubile

Hlanganisa i-SMT reflow kanye ne-DIP wave soldering, noma sebenzisa Namathisela i-Pin-in (PIP) izingxenye ezimbobo ezigeleza kabusha.

8.1 Izindlela Zokwenza Amaphaneli

• Ukusika okungu-V (Ukufaka amagoli angu-V): Izindleko eziphansi; ngamabhodi angunxande angenazo izingxenye ezisemaphethelweni.
• Ukulunywa Yigundane/Imbobo Yesitembu: Kumabhodi angajwayelekile noma izingxenye ezisemaphethelweni; sebenzisa ukuqondisa amathebhu nge ukulunywa yigundane.
• Ibhuloho + Ukulunywa Yigundane: Kuhlanganisa amandla kanye nokukhululeka kokuhlukana.

8.2 Isitimela Samathuluzi kanye Nophawu Lwezezimali

• Ububanzi besitimela samathuluzi: 3–5 mm.
• Uphawu oluyimfihlo: ububanzi obuyi-1 mm, ukuvulwa kwemaski ye-solder engu-2–3 mm, ukuqeda kwethini yegolide noma yokucwilisa.
• Izibalo zendawo zamadivayisi e-BGA/QFN fine-pitch.

8.3 Usayizi Wephaneli Nobuningi

• Usayizi wephaneli ngaphakathi kwemikhawulo ye-oven yokukhetha nokubeka kanye nokugeleza kabusha (≤400 mm × 400 mm).
• Linganisa ukusebenza kahle kanye nokusetshenziswa kwezinto; gwema ukuphambuka.
• Sebenzisa amathebhu aqhekekile noma izikhala eziqondisiwe ukunciphisa ukucindezeleka ngesikhathi sokususa amapaneli.

9.1 Ukuhlolwa Kukagesi

• I-DRC ayinawo amaphutha abulalayo.
• Ukuqhathaniswa kobude besiginali obubalulekile, ukuvimba, isikhala.
• Inethi yamandla ngokubala kanye nomthamo wamanje.
• Ukulingisa ubuqotho besiginali imiphumela ihlangabezana nezidingo zedayagramu yamehlo.

9.2 Ukuhlolwa kwe-DFM

• Usayizi wephedi ngokwe-IPC-7351.
• Isikhala sezingxenye sihlangabezana nezidingo eziphansi zokukhetha nokubeka.
• I-solder mask dam, i-silkscreen, uphawu lwe-polarity lucacile.
• Ukuvulwa kwe-stencil kuhambisana nesilinganiso sendawo.
• Ukufakwa kwamaphaneli futhi isitimela samathuluzi samanje.

9.3 Ukuhlolwa kwe-DFT

• Ukumbozwa kwamaphuzu okuhlola kumanethi abalulekile.
• Amaphuzu okuhlola awaphazanyiswa.
• Ukusebenziseka kwezinhlelo ze-ICT.

9.4 Ukuhlola Ukuhlanganiswa

• Isitimela samathuluzi kanye nezimpawu zokwethembeka zikhona.
• Indlela yokwenza amaphaneli ibe ngenengqondo.
• Ibanga lengxenye kusukela ku-V-cut ≥0.5 mm.

9.5 Ukuphelela Kwamadokhumenti

• Ukuqanjwa kwesendlalelo se-Gerber kujwayelekile.
• Izinombolo zezingxenye ze-BOM, amaphakheji, ubuningi obunembile.
• Khetha bese ubeka ifayela elifana ne-BOM.
• Ifayela le-stencil lihambisana nomklamo we-PCB.

Ngemikhiqizo yakudala noma ephelelwe yisikhathi Amabhodi wesekethe we-PCBA, Ubunjiniyela obubuyela emuva be-PCBA ingaphinda idale amafayela e-schematics, i-BOM, kanye ne-Gerber kusuka kumabhodi angokoqobo futhi ixhume idatha etholiwe entsha Umklamo we-PCB futhi Umhlangano we-PCBA umsebenzi.

Inqubo yethu yobunjiniyela obubuyela emuva ihlanganisa:

• Ukuhlolwa kwe-X-ray kanye nokuthwebula izithombe ebhodini ukumaka izendlalelo zangaphakathi.
• Ukuhlonza izingxenye kanye nokukhishwa kwe-BOM kufaka phakathi ukushintshwa kwezingxenye eziphelelwe yisikhathi.
• Ukuthwebula okuhleliwe kusukela ekwakhiweni kabusha kwe-netlist.
• Ukuzijabulisa ngokuhlelwa kwe-PCB ngokuthuthukiswa kwe-DFM.
• Umhlangano we-PCBA wesibonelo kanye nokuhlolwa kokusebenza.

Izinsizakalo ezengeziwe ezinenani elongeziwe:

• Ukugqoka okuhlanganisiwe ezindaweni ezinzima.
• Ukufaka izimbiza kanye nokufaka i-capsulation ukumelana nokudlidliza.
• Ukugcwaliswa okungaphansi ngamaphakheji e-BGA kanye ne-CSP.
• Ukulungisa kabusha nokulungisa kusetshenziswa isiteshi sokuvuselela i-BGA.
• Ukuthuthukiswa kokuhlolwa kokusebenza ye-PCBA eyenziwe ngokwezifiso.