PCBA Process Control and Quality Control of The 6 Mfundo Zazikulu

PCBA kupanga ndondomeko kumaphatikizapo PCB bolodi kupanga, chigawo zogula ndi kuyendera, chip processing, pulagi-mu processing, pulogalamu kuwotcha-mu, kuyezetsa, ukalamba ndi mndandanda wa ndondomeko, kotunga ndi kupanga unyolo ndi yaitali, chilema chilichonse mu ulalo umodzi adzachititsa chiwerengero chachikulu cha PCBA bolodi zoipa, chifukwa mu zotsatira zoopsa.Choncho, m'pofunika kwambiri kulamulira lonse PCBA kupanga ndondomeko.Nkhaniyi ikufotokoza mbali zotsatirazi za kusanthula.

1. PCB board kupanga

Analandira malamulo PCBA unachitikira chisanadze kupanga msonkhano n'kofunika kwambiri, makamaka kwa PCB Gerber wapamwamba kusanthula ndondomeko, ndi akulimbana makasitomala kugonjera manufacturability malipoti, mafakitale ang'onoang'ono ambiri saganizira izi, koma nthawi zambiri sachedwa mavuto khalidwe chifukwa PCB osauka. kupanga, zomwe zimapangitsa kuti pakhale ntchito yambiri yokonzanso ndi kukonza.Kupanga sikulinso chimodzimodzi, muyenera kuganiza mobwerezabwereza musanachite ndikuchita ntchito yabwino pasadakhale.Mwachitsanzo, pamene kusanthula owona PCB, kwa ena ang'onoang'ono ndi sachedwa kulephera zinthu, onetsetsani kupewa zipangizo apamwamba mu dongosolo masanjidwe, kuti rework chitsulo mutu mosavuta ntchito;Kutalikirana kwa dzenje la PCB ndi ubale wonyamula katundu wa bolodi, sizimayambitsa kupindika kapena kusweka;mawaya ngati angaganizire kusokoneza kwa ma frequency apamwamba, impedance ndi zinthu zina zofunika.

2. Kugula zinthu ndi kuyendera gawo

Kugula kwazinthu kumafuna kuwongolera kokhazikika kwa njira, kuyenera kuchokera kwa amalonda akulu ndi kujambula koyambirira kwa fakitale, 100% kupewa zida zachiwiri ndi zinthu zabodza.Kuonjezera apo, khazikitsani malo apadera oyendera zinthu zomwe zikubwera, kuyang'anitsitsa zinthu zotsatirazi kuti muwonetsetse kuti zigawozo zilibe zolakwika.

PCB:reflow uvunikuyezetsa kutentha, kuletsa mizere yowuluka, ngati dzenje latsekedwa kapena kutayikira inki, kaya bolodi ndi wopindika, etc.

IC: yang'anani ngati silkscreen ndi BOM ndizofanana ndendende, ndikuteteza kutentha ndi chinyezi nthawi zonse.

Zida zina zodziwika bwino: onani silkscreen, mawonekedwe, mtengo woyezera mphamvu, ndi zina.

Kuyang'anira zinthu molingana ndi njira yachitsanzo, gawo la 1-3% mwa onse

3. Patch processing

Solder phala kusindikiza ndi reflow uvuni kulamulira kutentha ndi mfundo yofunika kwambiri, ayenera kugwiritsa ntchito khalidwe labwino ndi kukwaniritsa zofunika ndondomeko laser stencil n'kofunika kwambiri.Malinga ndi zofunikira za PCB, gawo la kufunikira kowonjezera kapena kuchepetsa dzenje la stencil, kapena kugwiritsa ntchito mabowo ooneka ngati U, malinga ndi zofunikira za ndondomeko yopangira stencil.Kutentha kwa ng'anjo ya Reflow soldering ndi kuwongolera liwiro ndikofunikira kuti mulowetse phala la solder ndi kudalirika kwa solder, molingana ndi malangizo anthawi zonse a SOP owongolera.Komanso, kufunika okhwima kukhazikitsaMakina a SMT AOIkuyang'anira kuchepetsa chikhalidwe cha anthu chifukwa cha zoipa.

4. Kulowetsamo

Pulagi-in ndondomeko, kwa over-wave soldering mold design ndiye mfundo yaikulu.Momwe mungagwiritsire ntchito nkhunguyo imatha kukulitsa mwayi wopereka zinthu zabwino pambuyo pa ng'anjo, zomwe akatswiri a PE ayenera kupitiliza kuchita komanso kudziwa zomwe zikuchitika.

5. Kuwombera pulogalamu

Mu lipoti loyambirira la DFM, mutha kulangiza makasitomala kuti akhazikitse mfundo zoyeserera (Mfundo Zoyesa) pa PCB, cholinga chake ndikuyesa PCB ndi madulidwe adera a PCBA mutatha kugulitsa zigawo zonse.Ngati pali zikhalidwe, mutha kufunsa kasitomala kuti apereke pulogalamuyo ndikuwotcha pulogalamuyo ku IC yowongolera kudzera pazowotcha (monga ST-LINK, J-LINK, ndi zina zotero), kuti mutha kuyesa kusintha kwa magwiridwe antchito komwe kumabweretsa. ndi zochita zosiyanasiyana kukhudza kwambiri mwachilengedwe, motero kuyesa kukhulupirika kwa PCBA lonse.

6. PCBA board test

Pamaoda omwe ali ndi zofunikira zoyezetsa PCBA, zomwe zili mu mayesowa zili ndi ICT (In Circuit Test), FCT (Function Test), Burn In Test (mayeso okalamba), mayeso a kutentha ndi chinyezi, mayeso otsitsa, ndi zina, makamaka malinga ndi mayeso a kasitomala. ntchito pulogalamu ndi chidule lipoti deta akhoza kukhala.