Enkora ya PCBA omu muringo gw’omutaano neetandika na . Okukwatwa, erikukuratirwa . Okutaho PCB, Okutaho omuhanda, DRC (Okukyebera ebiragiro by'okukora), na DFM Kyebera, reero ebirugiremu Fayiro za Gerber, Fayiro za NC Drill, BOM (Ekihandiiko ky'ebintu), na Ekishushani ky'oruteerane. Aha dizayini ezigumire, HDI PCB tekinologiya na obucweka obukye obukozirwe laser na Okukuratana kw'ebintu nikibaasa kwetengyesa.

Fayiro z'okutaho ezikuru zirimu:

• Orunyiriri
• Okuteera ekishushani ky'ebyoma
• Orupapura rw'ebihandiiko
• Ekihandiiko ky'obushoboorozi bw'enkora (obugazi obukye bw'okukuratira/okutaho omwanya, obuhango bw'ekiina obukye, obugazi bw'ekiina ky'okukinga amaisho, ebyetaago by'okutegyeka impedance)

Fayiro z'ebirikurugamu ezikuru zirimu:

• Gerber RS-274X ningashi ODB++
• Fayiro ya NC Drill
• Toorana kandi oteho fairo
• Sitensili Gerber
• Ripoota y'enshonga y'okugyezibwa
• Ekishushani ky'oruteerane & Fayiro ya Silkscreen

2.1 Emisingye y'okutaho

Okuteebwaho n’omusingi gw’okukora PCBA kandi nikukwataho butoosha . Omutindo gw'okutaho akamanyiso, Okukora kw'okwotsya, na Okukora ebintu. Okuteebwa gye ni kikuru ahabwa okutegyeka okuzibira PCB designs n’ebicweka bya dijitali eby’omuvuyo gw’ahaiguru.

• Okubaganisamu okurikukoresibwa: Taana emyanya y’okukoresamu analog, digital, power, n’ey’omuvuyo gw’ahaiguru okwetantara okutabura.
• Okutambura kw'akamanyiso: Teeka ebicweka omu rubaju rw‘okugyendera kw‘obumanyiso kukyendeeza aha mwanya gw‘okurabamu n‘okuziika.
• Ekicweka ekikuru eky'okwebembeza: Teeka MCU/FPGA/SoC, DDR, eshaaha, n’ebicweka by’amaani omu kubanza.
• Okutaho aha rubaju: Ebikwato ebirikuteerana, obupesha, na LEDs haihi n’empimbi z’ebipande kuhikiiriza ebyetaago by’ebyoma.
• Entebekanisa y'okwotsya: Ebicweka by’amaani maingi haihi n’emihanda y’okusheeshasheesha obutagatsi nari ebipande by’okwotsya; okwongyera obutagatsi kurabira omu nkora ahansi y’ebicweka ebirikwotsya.

2.2 Ebikuru omu kuhabura

• Kukuratira obugazi & Obushoboorozi bwa hati: 0.5 mm obugazi bw’okukuratira aha 1 oz copper neetwara enkumi 1 A. Ahabw’okutunga amashanyarazi maingi, kozesa . omuringa ahabwa nari oburemeezi bw’omuringa oburikukirayo obuhango.
• Entaaniso y'ababiri: USB, HDMI, LVDS, Etaneti nizetenga Okuhikaana kw'oburaingwa, Okutaho omwanya ogurikwingana, na Okukwatanisa okuhamire okurinda oburingaaniza bw'akamanyiso kandi okyendeeze okufeerwa okutaho na okugaruzaho okufeerwa.
• Impedansi erikutegyekwa: Obumanyiso bw’omuvuyo gw’ahaiguru nibwetenga impedance y’obumanyiso erikubarwa kuruga omu stack-up; emihendo eya buriijo ni 50 Ω ey‘omuheru gumwe na 100 Ω ey‘entaaniso. Okushwijuma kwa inginiya kushemerire kubamu . okutegyeka impedansi okuhamya.
• Omuhanda gw'okugaruka: Reeba ngu enyonyi y‘okureeberaho ehikire okwetantara enshonga za EMI z‘enyonyi ezibaganisiibwemu; okwongyera okutunga haihi n’okuhindura kw’ebicweka.
• Kuraba: Kukyendeeza aha vias z’omuvuyo gw’ahaiguru; kwejunisa Okutimba enyima ningashi Empumi/Abaziikirwe Vias kyaba nikyetengyesa. Aha bishushani bya HDI, kozesa ebiteirweho ningashi kurabira omukuteganisibwa nana okwijuza omuringa.

DFM mbi neereetaho . Okuteerana, Okuteera amabaare, Ebikwato by'okuteera, Okuhindura ekicweka, na Emipiira y'okuteera. Okushwijuma DFM otakatandikire kukora ebintu bingi nikuhwera kurinda ebirikuruga omu kubanza.

3.1 Enkora y'eitaka

Enkora z’eitaka ziine kukuratira . IPC-7351. Okukora gye pad nikyetengyesa munonga kubaasa kwesigwa Orukiiko rwa PCB na Orukiiko rwa PCBA.

• Ebicweka bya CHIP (0402, 0603, 0805): Obuhango bwa pad buteekwa kuhikaana n’okukingaho kwa stencil n’okugaruka omu nkora okwetantara okuteera amabaare omu kituuro.
• QFN (Ekicweka kya kana Tihariho-kwebembera): Ahansi Paadi y'okwotsya biine kugabwamu kukyendeeza aha kusheeshasheesha n’okusheeshasheesha; kwejunisa ekijwaro ky'okukinga amaisho kishoboroirwe (SMD) ningashi ekitari ky'okukinga amaisho ekishobooroirwe (NSMD) paadi omu muringo oguhikire.
• BGA (Omupiira gwa Gridi): Pad diamita omu muringo gw’omutaano eri 80–85% ya diamita y’omupiira; okukingura kwa solder mask kushemerire kuba kuhikire okwetantara solder mask aha pad. Aha BGA ey’eiraka rirungi, kozesa Eiziba ry'okukinga amaisho obugazi ≤0.1 mm nari kwihaho dam kyaba nikyetengyesa.
• SOT/SOP/QFP: Fine pitch neeyenda obugazi bwa solder mask dam oburikumara okuzibira okuteerana.

3.2 Okutaho omwanya ahagati y'ebicweka n'okuhabura

• Okutaho emyanya eri haihi n‘ebicweka biine kuhikiiriza ebyetaago by‘okutoorana n‘okuta omu mwanya n‘okugaruka kukora (≥0.3 mm).
• Teekateeka aha bicweka ebirikushushana omu rubaju rumwe kubaasa kukyebera AOI kworobi.
• Guma omwanya ogurikumara ahagati y‘ebicweka ebiraingwa n‘ebigufu okwetantara ekicuucu omu bwire bw‘okugaruka kusheeshasheesha.

3.3 Ekijwaro ky'okukinga amaisho & Silkscreen

• Ekidiba ky'okukinga amaisho obugazi ≥0.1 mm okuzibira okuteerana.
• Ekipande kya siriki tiziine kujwanzya ebipapura; okuguma oine ≥0.2 mm y‘okukyebera.
• Okutaho akamanyiso, Pin 1 eky'okworeka, na Omumanyiso gw'okujuriza kiine kuba nikishoboororwa gye.
• Toorana erangi ya solder mask (kiragara, bururu, erikwiragura, erikutukura, erikwera) kurugirira aha ki abaguzi barikwenda; kureeba ngu ebihandiiko bya legend byashomwa.

4.1 DFT

DFT neebaasisa okugyezesa kwa PCBA okuhikire, okw’omuhendo mukye kandi neeshagika entunguuka ya puroguraamu y’okugyezesa n’okukora eby’okukoresa.

• Ekigyezo ky'okuguruka: Tihariho kikwato ekirikwetengyesa; kirungi munonga aha bishushani n’ebicweka bikye.
• ICT (ekigyezo ky'omu nkora): Nikyetengyesa enshonga z’okugyezesa n’okutaho; ekihikire aha iraka ry’ahaiguru. Nitukora design enshonga z'okugyezesa n’okukinga okurikumara.
• FCT (Ekigyezo ky’okukora): Nikihamya emirimo ya PCBA eyaabuzima.
• Okukyebera ensharo (JTAG): Nikikozesa enteekateeka y’okugyezesa chip eyombekirwemu kukyendeeza aha nshonga z’okugyezesa omubiri.

Ebyetaago bya DFT:

• Obuhango bw‘enshonga y‘okugyezesa ≥0.8 mm, omwanya ≥1.27 mm.
• Gabira enshonga z‘okugyezibwa aha rubaju rumwe kyaba nikibaasika.
• Reka emyanya y‘okukyebera etaine ki erikuzibira kandi eri hare n‘ebicweka ebiraingwa.
• Biika emyanya y’okugyezesamu amaani n’obutimba bw’ahansi kubaasa amaani-okuzibira ekigyezo kigufu na okupima amaani g'amashanyarazi.

4.2 DFA

DFA neeta omutima aha kuteerana gye n‘okuzibira enshobi.

• Okuteerana: Kwejunisa V-okushara (V-Okuteera) ningashi Okurumwa kw'embeba / Ekiina kya sitampu. Ekya pcb orukiiko n’ebicweka ebirikuhanikwa aha rubaju, kozesa okutaho omuhanda n’okurumwa kw’embeba.
• Egari y'omwika: 3–5 mm obugazi bw’okuhingisa n’okutaho ekikwato ky’okutwara ebintu.
• Akabonero k'obwesigwa: Haakiri 2–3 eby‘okwesiga eby‘ensi yoona; fiducials z‘omu kyanga ahabw‘ebyoma by‘okuhurira gye nka BGA na QFN.
• Omugogo gwa Poka: Reeba ngu ebikwato ebirikukwatanisa biine enkora y‘omutaano okuzibira okutaho okugaruka enyima.

5.1 Oburingaaniza bw‘akamanyiso (SI)

Enshonga za SI harimu . Ekishushani, Okugaaniira, Okurenga, Okuteera ahansi, na Obwire Skew. Sipiidi mpango Enkora ya PCB noobaasa kukoresa okugyeragyeranisa entebeekanisa y'okubanza na okuhamya bwanyima y'okutebeekanisa okushwijuma ekishushani ky'amaisho.

• Okuhikaana kwa Impedansi: Okuhendera kw’omubaro gw’entandikwa, okuhendera kwa parallel, nari okuhendera kwa AC.
• Okuhikaana kw'oburaingwa: Enkora y‘enjoka ahabw‘ebicweka bya DDR data/endagiiriro n‘ababiri abatari bamwe na bamwe.
• Okuzibira okugaaniira: ekiragiro kya 3W (okutaho omwanya ≥3× obugazi bw‘okukuratira); yongyera aha bishushani by‘okurinda ahabw‘obumanyiso obukuru.
• Garuka kurabira: Yongyera aha kutunga vias haihi n’okuhindura kw’ebicweka kukyendeeza aha nkora y’okuteerana.

5.2 Oburingaaniza bw‘amaani (PI)

Enshonga za PI zirimu Oruyombo rw'amaani, Okugwa kwa Voltage, na Okuguruka ahansi. Ekitebeekanisiibwe gye . Omukutu gw'okugaba amashanyarazi (PDN) ni kikuru munonga omu kukora okuhamire.

• Okutaana kw'obushoboorozi: Teeka 0.1 μF + 10 μF ebirikuteerana haihi na buri pini y‘amaani; kwejunisa ebikwato bya ESL ebikye ahabw’okutaho okuteerana kw’emirundi mingi.
• Enyonyi y'amaani ekabaganisamu: Enyonyi z’amaani eza analog na digital ezitarikushushana; yetantare okuraba omu myanya erimu obumanyiso bw’omuvuyo gw’ahaiguru.
• Omuhanda gw'okuzibira ahansi: Amaani agari haihi n’enyonyi z’ahansi nizireetaho obushoboorozi bw’enyonyi; okurinda dielectric nkye ahagati y‘amaani n‘ebicweka by‘ahansi.
• Kurabira omu kubara: Vias nyingi ezirikushushana ahabw’emihanda y’amaani maingi; kwejunisa vias eziijwire copper ahabwa vias z’amaani maingi.

5.3 EMC (Okuhikaana kw’amashanyarazi)

EMC neekingira EMI (okutabura kw'amashanyarazi) na EMS (Okukwatwaho kw’amashanyarazi). Okushwijuma kwa EMC okurikubanza kukuratira ebiragiro nikubaasa kumanya akabi k‘okukora enteekateeka hatakagyeziibwe omu butongore.

• Ekiragiro kya 20H: Recess power plane emikono n’okutaho 20× layer spacing kukyendeeza aha misiri y’okuteeraho.
• Okucencura aha nkoragana: Yongyeraho TVS, ebikwato by’okuteerana eby’omuringo gwa buriijo, obubare bwa ferrite, n’ebikwato by’okuteerana aha bikwatiraine na I/O.
• Okwekingira: Koresa ebikingirizo by‘okukinga aha myanya erimu obuzibu; kuha obupapura bw'okuta ahansi ahabw’okutaho engabo.
• Crystal & Eshaaha: Tihariho kugyendera ahansi y’ebicupuri; kozesa ebishushani by‘okurinda kandi ogume ebishushani by‘eshaha biri bikye.

5.4 Enkora ya HDI PCB

Aha dizayini z’oburemeezi bw’ahaiguru, HDI PCB tekinologiya na obucweka obukye obukozirwe laser, omuhumire, na okuziikwa vias nikibaasisa enshonga nkye z‘okukora n‘okutaho omuhanda gw‘ahaiguru. Ebikuru ebiteirweho:

• Ekipimo kya Microvia omu muringo gw’omutaano ≤1:1.
• Kwejunisa oburofa obuteirwe omu nshaho ahabw‘okuhindura kw‘emiringo omu myanya erimu abantu baingi.
• Okukuratana kw'ebintu enkora neebaasisa emiringo mingi ya microvia.
• Kurabira omu-pad nana okwijuza omuringa na enteekateeka ahabw'okukunda BGA.

6.1 Enkora ya BGA

BGA pad design neekwata butoosha aha kutunga eby’okuteera Orukiiko rwa PCB na Orukiiko rwa PCBA, namunonga omu kukozesa BGA ey’omutaano.

• Obuhango bwa paadi ≈0.8–0.85× oburaingwa bw‘omupiira (nk‘eky‘okureeberaho, paadi ya mm 0.25 ahabw‘omupiira gwa mm 0.3).
• Okukingura kw‘ekijwaro ky‘okukinga amaisho kihango kukira pad na mm 0.025–0.05 ahari buri rubaju.
• NSMD (Ekitari kya Solder Mask kishobooroirwe) ningashi SMD (Ekijwaro ky'okukinga amaisho kishobooroirwe); NSMD erikumanywa ahari BGA ey’eiraka rirungi.
• Okusheeshasheesha kurabira omu mm 0.2/mm nari obukye; kwejunisa Kurabira omu-paadi nana Copper eijwire / Resin eijwire okuzibira okusheeshasheesha kwa solder.
• Okwongyera obubonero bw'okwesiga obw'omu kyanga haihi na BGA ahabw’okuteebwaho okuhikire.

6.2 Entebekanisa ya QFN

Ebipapura bya QFN (Quad Flat No-lead) nibyetenga okukora gye ebipande by‘okwotsya.

• Baganisamu thermal pad omu pads nkye nyingi nari okozese pad emwe erimu ebicweka bya stencil apertures kukyendeeza aha kusheeshasheesha.
• Yongyera aha bipande bya pini 0.2–0.3 mm kurenga aha rubaju rw‘ekipapura ahabw‘okukyebera AOI.
• Kwejunisa Okutaho resini ningashi Okwijuza omuringa ahabw’okukoresa thermal pad vias okuzibira okusheeshasheesha kwa solder.
• Aha QFN ey’amaani maingi, yongyeraho . obutagatsi kurabira omu nkora okugaita n’enyonyi z’omuringa ez’omunda.

6.3 0402/0201/01005 obucweka obukye

• 0402 okutaho omwanya ahagati y’ebipande: 0.4–0.5 mm; 0201: 0.25-0.3 mm; 01005: 0.15-0.2 mm.
• Koresa ebishengye by‘okuteeraho omupiira gw‘okurwanisa (ebiine enyuguta nari ebikye).
• Ha obubonero bw‘okwesiga oburikumara ahabw‘okutaho obuhikire.
• Nakyo nikikuru okugaba ahabw’okuteerana kw’embaju ibiri n’ebicweka ebiremeire.

7.1 Okukora kwa Stencil

Enkora ya stencil neemanyisa butunu okuteera ebishushani omutindo kandi gushemerire kubonezibwa ahari buri PCBA.

• Obuhango bwa stencil: 0.1–0.15 mm omu muringo gw’omutaano; 0.08 mm ahabw’ebicweka ebikye; 0.2 mm ahabw’okukoresa amashanyarazi maingi.
• Omubaro gw'omwanya: Omwanya gw’okukingaho / omwanya gw’okukingaho ekisiika > 0.66.
• Ekishushani: Obugazi bw’ekipande / obuhango bw’ekipande > 1.5.
• Ebishumuruzo by'omutaano: QFN thermal pad amadirisa makye maingi; BGA okukyendeeza aha kwetoorora nari square; anti-solder omupiira oguriho ebifunjo by’ebicweka bya chipu.
• Nakyo nikikuru sitensili y'eidaara aha buhango bw‘ebicweka ebitaine rubaju (nk‘eky‘okureeberaho, stencil egumire aha myanya erimu amashanyarazi maingi, ekye ahabw‘eiraka rirungi).

7.2 Okugaruka kusheeshasheesha n’okuteerana

• Okugarukamu okushohoza: Ahabw’ebicweka bya SMT; nikyetengyesa ekihikire obutagasi (okubanza kwotsya, okuteeka, okugaruka kusheesha, okukyendeeza). Kwejunisa okugaruka kwa nitrogen ahabw’okutunguura okutobera n’okukyendeeza aha kusheeshasheesha.
• Okuteerana: Ahabw‘ebicweka by‘okurabira omu kiina (DIP) n‘omuringo gwa SMT red glue.
• Okutoorana amaizi g'omuyaga: Okuteerana kw’omu mwanya ahabw’ebicweka by’okurabira omu nshozi; ekirungi munonga aha bipande by’eby’obuhangwa ebitaine nkora.
• Enkora etariho kwebembera: SAC305 omubazi gw’okuteera; ebiri aha mutwe gw’okugaruka omu itaka 235–250 °C. Okuheza aha itaka okwa buriijo harimu . HASL etaine nshonga, IKIRIZA, Ekitongore ky'omuriro eky'okwekundira, efeeza y'okuta omu maizi, na etini y'okuta omu maizi.

7.3 Oruteerane orutaine rubaju

Gaita SMT reflow na DIP wave soldering, nari okorese Pini-omu-kutaho (PIP) ahabw‘ebicweka by‘okurabira omu kiina omu kugaruka.

8.1 Emiringo y'okuteerana

• V-okushara (V-Okuteera): Omuhendo mukye; aha mbaaho z’enkokora ezitariho ebicweka by’aha rubaju.
• Okurumwa kw'embeba / Ekiina kya sitampu: Ahabw’ebipande ebitarikushushana nari ebicweka by’aha rubaju; kwejunisa okutaho omuhanda nana okurumwa embeba.
• Orutindo + Okurumwa Embeba: Nikigaita amaani n’okwanguha kw’okwahukana.

8.2 Ebikwato by'egari y'omwika n'akamanyiso k'obwesigwa

• Obugazi bw’egari y’omwika y’okukoresa: 3–5 mm.
• Akamanyiso k‘okwesiga: 1 mm oburaingwa, 2–3 mm okukinga ekijwaro ky‘okukinga, ezaabu nari okuheza kw‘etini y‘okuta omu maizi.
• Ebihandiiko by‘omu kyanga eby‘ebyoma bya BGA/QFN eby‘okuteera akaari.

8.3 Obuhango bw'ekipande n'omuhendo

• Obuhango bw‘ekipande omu nkora y‘okutoorana n‘okutaho n‘okugaruka kusheesha (≤400 mm × 400 mm).
• Okugyeragyeranisa oburungi n‘okukoresa ebintu; okwetantara okuhindukahinduka.
• Kwejunisa Tabs z'okuhenda ningashi emyanya erimu emihanda okukyendeeza aha buremeezi omu bwire bw‘okukyendeeza aha nshaho.

9.1 Okukyebera amashanyarazi

• DRC tihaine enshobi z’okufa.
• Okushushanisa oburaingwa bw’akamanyiso akakuru, okuzibira, okutaho omwanya.
• Amashanyarazi akatimba kurabira omu kubara n’obushoboorozi bwa hati.
• Okugyeragyeranisa oburingaaniza bw'akamanyiso ebyarugamu nibihikiiriza ebyetaago by‘ekishushani ky‘amaisho.

9.2 DFM Kyebera

• Obuhango bwa paadi buri IPC-7351.
• Okutaho ebicweka birahikiiriza ebyetaago ebikye eby’okutoorana n’okuta omu mwanya.
• Eidaara ry'okukinga amaisho, ekipande kya silki, okutaho akamanyiso ka polarity.
• Okukingaho kwa stencil nikuhikiiriza omubaro gw’omwanya.
• Okuteerana na egari y'omwika okubaho.

9.3 Kukyebera DFT

• Okugyezesa okukingaho enshonga aha butimba obukuru.
• Enshonga z’okugyezibwa zitarikuremesa.
• Okubaasa kw’ebintu bya ICT.

9.4 Okukyebera orukiiko

• Egari y’omwika y’okukoresa n’obumanyiso bw’obwesigwa buriho.
• Omuringo gw’okuteerana niguhikaana n’enshonga.
• Oburaingwa bw‘ebicweka kuruga aha V-cut ≥0.5 mm.

9.5 Okuhikiiriza ebihandiiko

• Gerber okutaho eiziina ry’omutindo.
• BOM enamba z’ebicweka, ebipapura, obungi obuhikire.
• Toorana & oteho fairo erikuhikaana na BOM.
• Fayiro ya stencil neehikaana n’omuringo gwa PCB.

Ahabw'ebintu ebya ira nari ebitarikukora PCBA ebipande by'okutambura, PCBA okugaruka enyima nikibaasa kugaruka kuhangaho ebishushani, BOM, na fairo za Gerber kuruga aha bipande by’omubiri kandi kikwataniise n’ebihandiiko ebigarukiremu n’ebisya . Enkora ya PCB na Orukiiko rwa PCBA okutambura kw’emirimo.

Enkora yaitu ey'okugaruza enyima erimu:

• Okukyebera ebishushani aha rubaaho hamwe na X-ray okuhandiika maapu y’ebicweka by’omunda.
• Okumanya ebicweka hamwe n'okushohoza BOM harimu n’okugaruzaho ebicweka ebitarikukora.
• Okukwatwa kuruga omu kugaruka kwombeka netlist.
• Entebekanisa ya PCB ey'okweshemeza n’okutunguuka kwa DFM.
• Eky'okureeberaho ky'oruteerane rwa PCBA n‘okugyezibwa kw‘emirimo.

Obuheereza obundi obw'omuhendo:

• Okusiiga okurikushushana ahabw’embeera ezigumire.
• Okuteeka omu biyungu hamwe n'okukinga ahabw’okuzibira okutengeeta.
• Okwijuza ahansi ahabw’ebipapura bya BGA na CSP.
• Okugaruka kukora kandi okaboneza okukozesa siteegi y’okugaruka kukora eya BGA.
• Entunguuka y'okugyezibwa kw'emirimo ahabwa PCBA ey’omugyenzo.