Ulawulo lweNkqubo yePCBA kunye noLawulo loMgangatho weeNqaku ezi-6 eziphambili

Inkqubo yokuvelisa i-PCBA ibandakanya ukwenziwa kwebhodi ye-PCB, ukuthengwa kwecandelo kunye nokuhlolwa, ukusetyenzwa kwetshiphu, ukusetyenzwa kweplagi, ukutshiswa kwenkqubo, ukuvavanywa, ukuguga kunye nothotho lweenkqubo, unikezelo kunye nekhonkco lokuvelisa ixesha elide, nasiphi na isiphene kwikhonkco elinye siya kubangela inani elikhulu PCBA ibhodi embi, kubangele iziphumo ezibi.Ke ngoko, kubaluleke kakhulu ukulawula yonke inkqubo yokwenziwa kwePCBA.Eli nqaku ligxininisa kule miba ilandelayo yohlalutyo.

1. Ukwenziwa kwebhodi yePCB

Kufunyenwe imiyalelo PCBA ebanjwe intlanganiso pre-mveliso kubaluleke kakhulu, ingakumbi ifayile PCB Gerber ukuhlalutya inkqubo, kwaye kujoliswe kubathengi ukuba bangenise iingxelo manufacturability, iifektri ezininzi ezincinci azigxininisi kule nto, kodwa zihlala zixhomekeke kwiingxaki ezisemgangathweni ezibangelwa yi-PCB ehluphekileyo. uyilo, okukhokelela kwinani elikhulu lokuphinda usebenze kwakhona kunye nomsebenzi wokulungisa.Imveliso ayifani, kufuneka ucinge kabini ngaphambi kokuba wenze kwaye wenze umsebenzi olungileyo kwangaphambili.Ngokomzekelo, xa uhlalutya iifayile ze-PCB, kwezinye ezincinci kwaye zivame ukusilela kwizinto eziphathekayo, qiniseka ukuba uphephe izinto eziphezulu kwisakhiwo sesakhiwo, ukuze i-rework iron head isebenze lula;PCB umngxuma isithuba kunye nobudlelwane ibhodi umthwalo-ethwele, musa ukugoba okanye ukwaphuka;i-wiring nokuba ithathelwe ingqalelo uphazamiseko lwesignali ye-high-frequency, impedance kunye nezinye izinto eziphambili.

2. Ukuthengwa kwecandelo kunye nokuhlolwa

Ukuthengwa kwecandelo kufuna ulawulo olungqongqo lwetshaneli, kufuneka luvela kubathengisi abakhulu kunye ne-original factory pickup, i-100% ukuphepha izinto ezisetyenzisiweyo kunye nezixhobo zobuxoki.Ukongezelela, misela izikhundla ezikhethekileyo zokuhlola izinto ezingenayo, ukuhlolwa okungqongqo kwezi zinto zilandelayo ukuze kuqinisekiswe ukuba amacandelo angenasiphoso.

I-PCB:reflow ovenuvavanyo lobushushu, ban kwi imigca endizayo, nokuba umngxuma ivaliwe okanye inki evuzayo, nokuba ibhodi igobile, njl.

IC: khangela ukuba i-silkscreen kunye ne-BOM ziyafana ncam, kwaye zenze ubushushu obungaguqukiyo kunye nokugcinwa kokufuma.

Ezinye izinto eziqhelekileyo: khangela i-silkscreen, ukubonakala, ixabiso lokulinganisa amandla, njl.

Izinto zokuhlola ngokuhambelana nendlela yokusampula, umlinganiselo we-1-3% ngokubanzi

3. Ukulungiswa kwepetshi

I-Solder paste yoshicilelo kunye nokulawula ubushushu be-oven kwakhona yingongoma ephambili, kufuneka usebenzise umgangatho omhle kwaye uhlangabezane neemfuno zenkqubo ye-laser stencil ibaluleke kakhulu.Ngokweemfuno zePCB, inxalenye yesidingo sokwandisa okanye ukunciphisa umngxuma we-stencil, okanye ukusetyenziswa kwemingxuma e-U, ngokweemfuno zenkqubo yokuveliswa kwee-stencils.Ukushisa kwe-oven ye-solder kunye nokulawulwa kwesantya kubalulekile kwi-solder paste infiltration kunye nokuthembeka kwe-solder, ngokwemigaqo yokusebenza ye-SOP eqhelekileyo yokulawula.Ukongeza, imfuno yokuphunyezwa ngokungqongqo kweUmatshini we-SMT AOIUkuhlolwa kokunciphisa imeko yomntu ebangelwa bububi.

4. Ukusetyenzwa kokufakwa

Inkqubo yokufaka iplagi, kuyilo lokungunda kwe-wave solder yeyona nto iphambili.Indlela yokusebenzisa i-mold inokwandisa amathuba okubonelela ngeemveliso ezilungileyo emva kwesithando somlilo, okuyiyo iinjineli ze-PE kufuneka ziqhubeke nokusebenza kunye namava kwinkqubo.

5. Ukudubula inkqubo

Kwingxelo yokuqala ye-DFM, ungacebisa umthengi ukuba abeke amanqaku athile ovavanyo (Amanqaku ovavanyo) kwi-PCB, injongo kukuvavanya i-PCB kunye ne-PCBA yesekethe conductivity emva kokuthengisela onke amacandelo.Ukuba kukho iimeko, unokucela umthengi ukuba anikeze inkqubo kwaye atshise inkqubo kwi-IC yolawulo oluphambili ngokusebenzisa izitshisi (ezifana ne-ST-LINK, J-LINK, njl.), ukwenzela ukuba unokuvavanya utshintsho olusebenzayo oluziswayo. ngezenzo ezahlukeneyo zokuchukumisa ngakumbi, kwaye ngaloo ndlela uvavanya ingqibelelo yokusebenza kwayo yonke iPCBA.

6. uvavanyo lwebhodi PCBA

Ii-odolo ezineemfuno zovavanyo lwe-PCBA, umxholo wovavanyo oluphambili uqulathe i-ICT (Kuvavanyo lweSekethe), i-FCT (uVavanyo lweMsebenzi), iBurn In Test (uvavanyo lokuguga), uvavanyo lobushushu kunye nokufuma, uvavanyo lokuwisa, njl., ngokuthe ngqo kuvavanyo lomthengi. ukusebenza inkqubo kunye nedatha ingxelo isishwankathelo ingaba.