Umklamo we-DFT Yokuhlolwa Kwezisekelo ze-PCB kanye Nesu Lokuhlola

I-Highleap Electronics inikeza ukwenziwa kwe-PCB kanye nokuhlanganiswa kwe-PCB, futhi sihlola ukuthi ingahlolwa yini ngesikhathi sokubuyekezwa kwethu kwamahhala kwe-DFM . Umgomo ulula: ukumangala okuncane ngesikhathi sokwakhiwa, imiphumela ecacile yokuhluleka kokudlula, kanye nokulethwa okusheshayo.

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Izisekelo ze-DFT PCB

Ukuklama i-DFT yokuhlolwa kusho ukuklama i-PCB yakho ukuze ukukhiqiza kukwazi ukuyiqinisekisa ngempumelelo. Akuyona into "emnandi ukuba nayo". Kuthinta ngqo:

• Isikhathi sokulethwa ngoba amabhodi okunzima ukuwahlola adinga ukuhlolwa okwengeziwe ngesandla kanye nezihibe zokulungisa amaphutha ezinde
• Veza ngoba amanetha angahlolwa avumela amaphutha ukuba aphume kuze kube yilapho esedlule
• Izindleko ngoba isikhathi sokuphinda usebenze kabusha kanye nobunjiniyela sidlula ngokushesha izindleko zokwengeza ukufinyelela kokuhlola
• Ukungaguquguquki ngoba ukufinyelela okucacile kokuhlola kwenza ukuhlolwa okuphindaphindwayo kuwo wonke amaqoqo kanye namafektri

Amaphutha amaningi okuhlanganisa awayona imfihlakalo. Ngokuvamile avuleka, amafushane, amaphutha okusoda, izinkinga ze-polarity, amanani angalungile, noma izingxenye ezingekho. I-DFT iqinisekisa ukuthi ifektri ingathola futhi ihlukanise lawo maphutha ngokushesha.

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Isu Lokuhlola le-PCBA

I-DFT enhle iqala ngokukhetha isu lokuhlola elingokoqobo. Awudingi zonke izindlela. Udinga inhlanganisela efanele yevolumu yakho, ubuningi, kanye nengozi.

Ukuhlolwa kwe-ICT kwesekethe

• Okuhle kakhulu ivolumu ephakathi nendawo ephezulu lapho isikhathi sokujikeleza okusheshayo kanye nokuphindaphinda kubalulekile khona
• Amandla ukumbozwa okuhle kakhulu kweziphambeko zokukhiqiza lapho kukhona ukufinyelela
• imfuneko amaphuzu okuhlola anele futhi ngokuvamile i-fixture

Ukuhlolwa kwe-Flying probe

• Okuhle kakhulu ama-prototypes kanye nomthamo ophansi lapho izinguquko zomklamo zivame khona
• Amandla akukho ukutshalwa kwezimali okuhleliwe futhi kuyaguquguquka ukuze kubuyekezwe
• Ezohwebo kancane ngebhodi kune-ICT

Ukuskena komngcele i-JTAG

• Okuhle kakhulu imiklamo yedijithali ebanzi enamadivayisi anekhono le-JTAG
• Amandla yengeza isembozo ngaphandle kokudinga ama-probe pad kuyo yonke inethi
• Limit ayithathi indawo yokuhlola kwe-analog noma ukuqinisekiswa okugcwele kokusebenza

Ukuhlolwa okusebenzayo

• Okuhle kakhulu ukuqinisekisa ukuthi umkhiqizo usebenza ngaphansi kwamandla nezimo zangempela
• Amandla kuqinisekisa inhloso yokuklama
• Risk ingaphuthelwa amaphutha okuhlanganisa uma ukumbozwa kungahleliwe

Ingxube evamile yomhlaba wangempela yi-Flying Probe kanye ne-Functional yama-prototype, kanye ne-ICT kanye ne-Functional yokukhiqiza. Uma i-ICT ingenakwenzeka, ingxube ehleliwe yokuhlola okukhethiwe, i-JTAG lapho itholakala khona, kanye nokuhlolwa kokusebenza kusengathola ukuzethemba okuqinile.

Thola isilinganiso se-PCB kanye ne-PCBA

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Umklamo Wephoyinti Lokuhlola le-PCB

Amaphuzu okuhlola ayisici se-ROI DFT esiphezulu kakhulu. Uma amaphuzu akho okuhlola kulula ukuwafinyelela, ukuhlolwa kokukhiqiza kuba okusheshayo nokuphindekayo. Uma engekho noma ebekwe kabi, ukuhlolwa kuba ngesandla, kuhamba kancane, futhi kungaguquguquki.

Usayizi wephuzu lokuhlola kanye nokuqeda

• I-probe yokundiza ngokuvamile isebenza kahle ngama-pad azinikele acishe abe ngu-0.5mm kuya ku-0.7mm ububanzi, kuye ngokuthi ubuningi bakho kanye nohlelo lwakho lokuhlola.
• Izinhlelo ze-ICT ngokuvamile bakhetha ama-pad amakhulu azinikele azungeze ububanzi obungu-0.9mm kuya ku-1.0mm ukuze baxhumane ngendlela ethembekile futhi banciphise izinga lokuhluleka okungamanga
• Ukuqedwa kwendawo kufanele kube lula futhi kuzinzile. Gwema ukuthembela kuma-pads ambozwe nge-solder ukuze uhlole ngoba kungandisa ukuguquguquka. Ama-pads ethusi avele akhethekile anesiphetho esifanele ahlala njalo.

Iseluleko esiwusizo Uma ungaqiniseki ukuthi iyiphi indlela yokuhlola ezosetshenziswa, klama izindawo zokuhlola okungenani ezilungele ukuphenywa ngendiza, bese ubhuka izindawo ezivulekile ezingasekela i-ICT ekubuyekezweni kokukhiqiza kwesikhathi esizayo.

Isikhala sendawo yokuhlola kanye nokufinyelela

Amaphuzu okuhlola ayahluleka kaningi ngoba ama-probe awakwazi ukuwafinyelela ngokoqobo. Imithetho evamile yokufinyelela:

• Okokugcina shiya indawo evulekile ezingxenyeni ezinde, izihlangu, izixhumi, kanye nama-heatsink ukuze ama-probe angashayisani
• Umkhawulo womphetho webhodi gwema ukubeka amaphuzu okuhlola eduze kakhulu nohlaka lwe-PCB lapho izinto ezifakiwe kanye nezikhonkwane zingaphazamisa khona
• Ukuhlola uhlangothi olulodwa uma kungenzeka, gcina iningi lamaphuzu okuhlola ohlangothini olulodwa ukuze kube lula ukusethwa kokuhlolwa futhi kuncishiswe izindleko

Uma ibhodi lakho kumele lihlolwe ohlangothini olulodwa, qala kuqala ngamanethi abalulekile kulolo hlangothi, bese ubeka amanethi esibili lapho isikhala sivuma khona.

Yimaphi amanethi okufanele athole amaphuzu okuhlola

Ekukhiqizeni, awudingi indawo yokuhlola kuyo yonke inethi. Udinga ukumbozwa kwamanethi okwembula ngokushesha amaphutha okuhlanganisa kanye nokwehluleka kokuhlukanisa.

• Zonke iziteshi zikagesi isizinda ngasinye se-voltage kufanele sibe namaphuzu okulinganisa afinyelelekayo
• Izizathu eziningi ukufinyelela phansi okuzinzile kunciphisa umsindo kanye nokwehluleka kwamanga ngesikhathi sokulinganisa
• Ukufinyelela kokuhlela nokulungisa amaphutha Ama-header e-SWD JTAG UART noma izinhlelo avimbela ukwakheka okubambezelekile lapho kudingeka i-firmware noma ukucushwa
• Setha kabusha amandla amawashi amanetha okulawula ayisisekelo anquma ukuthi ibhodi liyaphila yini
• Ama-node ayisihluthulelo e-analog izinkomba zemigqa yokuqonda kanye namaphuzu okuphendula lapho ungachaza khona imikhawulo yokuhluleka kokudlula
• interface izikhonkwane zokhiye zamachweba okuxhumana asetshenziselwa ukuhlolwa okusebenzayo

Isimiso sokukhuphula okuphezulu Engeza amaphuzu okuhlola lapho ukulinganisa kungaqinisekisa khona izinto eziningi ngesikhathi esisodwa, njengesitimela esiqinisekisa nomlawuli, inethiwekhi yomuzwa, kanye nesimo somthwalo ophansi.

Indlela yokulebula nokubhala phansi amaphuzu okuhlola

Ngisho namaphuzu okuhlola aphelele alahlekelwa inani uma kunzima ukuwabona. Ukuze ugweme ukulungisa iphutha kancane ngesikhathi sokukhiqiza:

• Qamba amaphuzu okuhlola ngezinkomba ezicacile njenge-TP1 TP2 kanye negama eliphelele kumadokhumenti
• Faka uhlu lwamaphuzu okuhlola kuphakheji yakho yomhlangano ehlanganisa i-TP negama eliphelele kanye namanani alindelekile
• Nikeza umbono womhlangano kukhombisa izindawo zokubhekisela okusheshayo komqhubi

Amaphuzu okuhlola kanye nezimpawu zesivinini esiphezulu

Amanethi asheshayo kanye nezimpawu ze-impedance ezilawulwayo zidinga ukunakekelwa okukhethekile. Iphedi yokuhlola engabekwanga kahle ingadala izingcezu futhi yonakalise ubuqotho besiginali.

• Gwema amaphedi okuhlola emigqeni ye-impedance elawulwayo uma kungenzeka
• Sebenzisa i-pad encane kakhulu engenzeka futhi ugcine i-stub imfushane ngangokunokwenzeka uma kudingeka ukuhlola
• Khetha ukufinyelela okusekelwe kusixhumi kwezinye izindawo ezisheshayo lapho ukuhlola kungenzeki khona

Uma kufanele uhlole inethi yesivinini esiphezulu, bhala phansi indlela yokulinganisa kanye nemikhawulo eyamukelekayo ukuze ukuhlolwa kuhambisane futhi kungadali ukwehluleka okungamanga.

Uhlu lokuhlola olusheshayo lwamaphuzu okuhlola

• Ama-test pad akhethekile asetshenziselwa amanethi abalulekile kunokuthembela kuma-via
• Izindawo zokuhlola ziyafinyeleleka futhi azivinjelwa izingxenye ezinde noma izihlangu
• Amaphuzu kagesi kanye nomhlabathi anele ukulinganisa okuzinzile
• Ukufinyelela kokuhlela nokulungisa amaphutha kufakiwe
• Imibhalo ihlanganisa ngokucacile izihlonzi ze-TP kumanethi kanye namanani alindelekile

Uma lezi zinto sezikhona, ukuhlolwa kokukhiqiza kuyashesha, futhi ukwehluleka kuba lula ukukuthola. Lokho ngokuvamile kunciphisa isikhathi sokusebenza kabusha futhi kuthuthukisa ukubikezela kokulethwa.

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Iziqondiso Zokuklama i-ICT

I-ICT ivame ukuba yindlela yokuhlola ukukhiqiza esheshayo, kodwa kuphela uma i-PCB iyisekela. Uma ivolumu yomkhiqizo wakho ikhula, ukuklama ucabanga nge-ICT kungabuyisela ngokushesha.

• Ukuhlela ukufinyelela ekuhlolweni qinisekisa ukuthi amanethi abalulekile ayafinyeleleka ngaphandle kokushayisana nokuthi amaphuzu okuhlola awafihlwa ngaphansi kwezingxenye
• Isu lokusekela phansi hlinzeka ngamaphuzu amaningi okuhlola phansi ukuze wehlise impedance futhi uthuthukise ukuzinza kokulinganisa
• Ukwesekwa kwebhodi hlela izindawo zokusekela zemishini ukuze ukucindezela kwe-probe kungaguquguquki i-PCB futhi kubangele ukuthintana noma ukulimala ngezikhathi ezithile
• Ukubaluleka kokumbozwa gxila ekufinyeleleni kwe-ICT kumandla, ukusetha kabusha, izinkomba, kanye nokwehluleka ukuhlukanisa ama-node kunokuzama ukufinyelela konke

Uma i-PCB yakho iminyene kakhulu kwi-ICT ebanzi, isu elihlanganisiwe lisengaba lula ekukhiqizeni. I-Flying probe noma ukumbozwa kwe-ICT okukhethiwe kanye nokuhlolwa okusebenzayo kuvame ukufeza imiphumela enamandla ngaphandle kokuphoqa ukwakheka okungenangqondo.

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Isibuyekezo se-DFT e-Highleap

I-Highleap Electronics iyifektri yokukhiqiza i-PCB kanye ne-PCB. Umgomo wethu awukona ukufundisa ithiyori. Umgomo wethu ukuthumela amabhodi aphumelela ukuhlolwa ngokushesha nangokungaguquguquki. Yingakho sibuyekeza ukuthi angahlolwa yini njengengxenye yokubuyekezwa kwethu kwamahhala kwe-DFM.

Lokho esikuhlolayo ngaphambi kokukhiqiza

• Ukufinyelela endaweni yokuhlola kanye nokwenzeka kwe-ICT noma i-flying probe
• Ukuhlela nokulungiselela ukufinyelela kokulungisa amaphutha
• Ukufinyelela kanye nemibhalo ye-JTAG chain uma kusebenza
• Okufakwayo kokuhlolwa okusebenzayo kuyadingeka ukuze kuchazwe izindlela zokuphumelela
• Iziphakamiso ezisebenzayo zokunciphisa isikhathi sokuhlolwa nokuthuthukisa ukuzihlukanisa

Okufanele ukuthumele ukuze uthole isibuyekezo esisheshayo

• Amafayela e-Gerber noma e-ODB kanye ne-drill
• Ifayela le-BOM kanye ne-centroid CPL
• I-prototype noma umkhiqizo wakho wokulinganisa ivolumu
• Noma yimiphi imikhawulo yokungena esikhundleni noma yokuthobela imithetho
• Ukulindela okusebenzayo noma uhlu lokuhlola oluyisisekelo uma unalo

Cela Ukubuyekezwa Kwamahhala kwe-DFM kanye ne-DFT

I-DFT kulula ukuyilungisa ngaphambi kokuba kuqale ukwakhiwa. Uma ufuna ukuhlolwa okubushelelezi kanye nokubambezeleka okuncane, thumela amafayela akho futhi sizokutshela ukuthi yini okufanele uyishintshe nokuthi yini engahlala injalo.