PCB DFT

Hlola umhlaba we-PCB DFT futhi ulungiselele amabhodi wakho wokujikeleza ukuze ahlolwe kahle, ukwehlisa izindleko, kanye nekhwalithi ethuthukisiwe.

I-DFT
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Isevisi ye-PCB DFT

I-PCB DFT imele ukuthi “Design for Testability.” Kuyisethi yamasu namasu asetshenziswa ngesikhathi senqubo yokuklama ye-PCB ukuze kuqinisekiswe ukuthi ama-PCB akhiqiziwe angahlolwa ngempumelelo nangempumelelo ukusebenza kanye nekhwalithi. Inhloso eyinhloko ye-PCB DFT ukuthuthukisa ukuhlolela kanye namakhono okubona amaphutha e-PCB, ekugcineni kuncishiswe isikhathi nomzamo odingekayo wokuhlola nokuxazulula izinkinga.

Izinsizakalo ze-PCB DFT (Design for Testability) zibhekisela kumasevisi ochwepheshe agxile ekwakhiweni kwamabhodi esekethe aphrintiwe (ama-PCB) okucatshangwa ngokuhlolwa. Lezi zinsizakalo zihlose ukuqinisekisa ukuthi imiklamo ye-PCB ingahlolwa kahle futhi iqinisekiswe phakathi nezigaba zokukhiqiza nokuhlola. Nawa amaphuzu abalulekile wezinsizakalo ze-PCB DFT:

  • I-Design for Testability (DFT): Ingqikithi yezinsizakalo ze-PCB DFT ifaka ukuklama okunokuhlolwa engqondweni. Lokhu kusho ukucabangela izidingo zokuhlola nokuqinisekisa ngesikhathi sesigaba sokuklama se-PCB ukuze unike amandla ukuhlola okuphumelelayo ngesikhathi sokukhiqiza.
  • Ukufinyeleleka Okuthuthukisiwe Kokuhlola: Amasevisi e-PCB DFT ahlanganisa ama-elementi afana namaphoyinti okuhlola, amasekhethi okuhlola, nezindawo zokuhlola kumiklamo ye-PCB, okwenza kube lula ukuhlola izici ezihlukahlukene ze-PCB phakathi nezigaba zokuhlola ezilandelayo. Lokhu kusiza ekuboneni amaphutha nezinkinga ezingaba khona.
  • Izindleko Ezehlisiwe Zokukhiqiza: Ngokucabangela izidingo zokuhlola ekwakhiweni kwe-PCB, kuba lula ukuthola izinkinga ngesikhathi sokukhiqiza, ukwehlisa inani lemikhiqizo enesici kanye nokwehlisa izindleko zokukhiqiza.
  • Ikhwalithi Yomkhiqizo Ethuthukisiwe: Izinsizakalo ze-PCB DFT zifaka isandla ekuqinisekiseni ukuthi ama-PCB asebenza ngendlela efanele ngesikhathi sokuhlolwa ngemva kokukhiqizwa. Lokhu kuthuthukisa ikhwalithi nokuthembeka komkhiqizo wokugcina.
  • Amasu Okuhlola Enziwe Ngokwezifiso: Izinsizakalo ze-PCB DFT zivumela ukwenziwa ngokwezifiso kwamasu okuhlola ngokusekelwe ezidingweni zephrojekthi kanye nokuba yinkimbinkimbi kwe-PCB. Lokhu kusho ukukhetha izindlela zokuhlola ezifanele namathuluzi ephrojekthi ngayinye.
  • Ukusebenzisana Nabakhiqizi: Izinsizakalo ze-PCB DFT ngokuvamile zibandakanya ukusebenzisana nabakhiqizi be-PCB noma abahlinzeki bomhlangano ukuze kuqinisekiswe ukuthi amadizayini e-PCB angenziwa ngokushelelayo ekukhiqizeni nasekuhlolweni okudingekayo.

Kafushane, izinsizakalo ze-PCB DFT zihlose ukuthuthukisa amadizayini e-PCB ukuze kube lula nokuqinisekisa ukufaneleka kokusebenza kanye nekhwalithi phakathi nezigaba zokukhiqiza nokuhlola. Lokhu kusiza ukunciphisa izindleko, ukuthuthukisa ikhwalithi, futhi kusheshise isikhathi sokuya emakethe ngemikhiqizo. Ngakho-ke, ukucabangela izinsizakalo ze-PCB DFT ngokuvamile kuyisinqumo esihlakaniphile, ikakhulukazi emikhiqizweni ye-elekthronikhi eyinkimbinkimbi.

Ukubaluleka kwe-PCB DFT

I-PCB DFT isiyalo esinezici eziningi esidlula ukuqukatha izindleko, ukuqinisekiswa kwekhwalithi, ukusebenza kahle kwesikhathi, nokwenza ngokwezifiso. Umthelela wayo ojulile ekukhiqizweni kwe-PCB ugcizelela indima yayo ebalulekile ekukhiqizeni izinto zikagesi zesimanje, lapho ukunemba, ukwethembeka, kanye nesikhathi sokuya emakethe kubaluleke kakhulu. Ngakho-ke, i-PCB DFT iyithuluzi elibalulekile labakhiqizi abalwela ukuletha imikhiqizo esezingeni eliphezulu esebenza kahle kakhulu nangokushesha.

Ukunciphisa Izindleko Nokuthuthukisa

I-PCB DFT idlala indima ebalulekile ekwehliseni nasekuthuthukiseni izindleko kuwo wonke umjikelezo wokukhiqiza we-PCB. Ngokukhomba ngokushesha futhi ulungise iziphambeko ezigabeni zokuqala zokukhiqiza, kunciphisa kakhulu imfuneko yokusebenza kabusha ebizayo, ukushintshwa kwezingxenye, noma ukusula wonke amaqoqo e-PCB. Lokhu kusho ukonga imali enkulu ezintweni ezibonakalayo, zabasebenzi, nezokusebenza.

Amazinga Aphakeme Okuqinisekisa Ikhwalithi

Ukuqinisekiswa kwekhwalithi kumi njengesisekelo se-PCB DFT. Isiza ukuqaliswa kwezinqubo zokuhlola eziqinile, ikhuthaza i-ecosystem eqinile yokuhlola ubuqotho nokuthembeka komkhiqizo wokugcina. Ngenxa yalokho, amathuba okuthumela ama-PCB anamaphutha kumakhasimende ancipha kakhulu. Lokhu akugcini nje ngokuvikela isithunzi somkhiqizi kodwa futhi kuqinisa ukwethenjwa kwamakhasimende.

Ukusheshisa kwe-Time-to-Market

Ukusebenza kahle kwesikhathi kuyisici esibalulekile endaweni enokuncintisana kakhulu yokukhiqiza ama-electronics. I-PCB DFT yenza lula inqubo yokuhlola, inikeze amandla ukuqinisekiswa okusheshayo nokucophelelayo kwama-PCB. Ngakho-ke, isheshisa wonke umjikelezo wokuthuthukiswa komkhiqizo, ufinyelela umvuthwandaba ngesikhathi esisheshayo sokuya emakethe kumishini kagesi. Lokhu kusabela okushesha kakhulu ezidingweni zemakethe kungase kushintshe umdlalo ngokuhlala uphambi kwezimbangi.

Amasu Okuhlola Ahlanganisiwe

Ukuhlukahluka kwe-PCB DFT kuvezwa amandla ayo okwamukela amasu okuhlola enziwe ngendlela oyifisayo. Ivumelana ngokukhululekile nobunkimbinkimbi obuyingqayizivele nezimfuno zomklamo ngamunye we-PCB. I-PCB DFT ingacushwa kahle ukuze ibhekane nezinselele ezithile, kuqinisekiswe ukuthi kusetshenziswa izindlela zokuhlola ezifanele kakhulu. Le ndlela ehlanganisiwe ikhulisa ukusebenza ngempumelelo kokuhlola futhi iqinisekisa ukuthi ngisho nemiklamo eyinkimbinkimbi iyaqinisekiswa.

I-Flying Probe vs. Ukuhlolwa Kombhede Wezinzipho ku-PCB DFT

I-Flying-Probe-Testing-scaled

I-Flying Probe Test

I-Flying Probe Test iyindlela yokuhlola engaphakathi kwesifunda (i-ICT) engavamisile esetshenziselwa ukukala amasekhethi avulekile/amafushane, amanani wezingxenye ze-passive, kanye nokuqhubeka. Lokhu kuhlolwa kuvame ukusetshenziselwa ama-prototypes kanye nokugijima kokukhiqiza kwevolumu ephansi. Kubandakanya ukusetshenziswa kwemishini yokuhlola ezenzakalelayo (ATE) enama-probe anyakazayo athintana namaphoyinti okuhlola ku-PCB.
I-Flying Probe Test inikezela ngenzuzo yokungadingi ukuhlolwa okuzinikele, okunciphisa izindleko nesikhathi esihlobene nokuthuthukiswa kwemidlalo. Amaphoyinti okuhlola ngokuvamile aklanyelwe ukwakheka kwe-PCB, futhi isistimu ye-ATE ihlelelwe ukuhambisa ama-probe ezindaweni zokuhlola ezifanele futhi yenze izilinganiso ezidingekayo.

Umbhede-wezinzipho-Test

Umbhede Wezinzipho Test

I-Bed of Nails Test, eyaziwa nangokuthi i-in-circuit test (ICT) noma i-pin-point test, isivivinyo esiphelele nesinemininingwane uma kuqhathaniswa ne-Flying Probe Test. Kubandakanya ukusetshenziswa kokuhlolwa okuzinikele okuqukethe igridi yamaphini alayishwe entwasahlobo, athintana namaphoyinti athile okuhlola ku-PCB.
I-Bed of Nails Test ijwayele ukuqashwa emiqhudelwaneni yokukhiqiza ephakathi kuya kwephezulu. Isimiso sokuhlola sakhiwe ngokwezifiso ukuze sifane nesakhiwo se-PCB, izikhonkwane ezilayishwe intwasahlobo zibekwe ukuze zixhumane namaphoyinti okuhlola amisiwe. Le ndlela yokuhlola ivumela ukukalwa kwamapharamitha ahlukahlukene, okuhlanganisa amasignali e-analog nedijithali, futhi inganikeza ulwazi oluningiliziwe mayelana nokusebenza nokusebenza kwe-PCB.

Kokubili Ukuhlolwa Kokuhlola Okundizayo kanye Nokuhlolwa Kombhede Wezinzipho kungamathuluzi abalulekile ekuhlolweni kwe-PCB, futhi ukukhetha phakathi kwakho kuncike ezintweni ezifana nevolumu yokukhiqiza, izidingo zokufakwa kokuhlolwa, nokucatshangelwa kwesabelomali. Abaklami be-PCB kufanele basebenzisane eduze nabakhiqizi bezinkontileka ukuze banqume indlela yokuhlola efaneleke kakhulu ngokusekelwe ezidingweni ezithile zephrojekthi.

I-PCB DFT Yokuhlola Isekhethi Esebenzayo

Izinsizakalo ze-Highleap's PCB Assembly Design for Testing (DFT) zihlanganisa indlela ephelele yokuqinisekisa ukusebenza kanye nekhwalithi yemihlangano yakho yebhodi lesifunda ephrintiwe (ama-PCBA). Ukuzibophezela kwethu ekwenzeni kahle ekuhlolweni kwe-PCB kususelwa ezinkambisweni ezinhle kakhulu zakho zombili i-Functional Circuit Testing (FCT) kanye ne-In-Circuit Testing (ICT).

I-DFT Yokuhlola Isekhethi Esebenzayo

I-FCT imele indlela yebhokisi elimnyama, eqondise konke okukhiphayo nokusebenza kwama-PCB akho. Igcizelela izinqubo zakho zokuhlola ezithile kunemininingwane yebhodi eyinkimbinkimbi. Uma ukhetha i-FCT kuphrojekthi yakho, siqala inqubo phakathi nesigaba sokucaphuna. Sikukhuthaza ukuthi unikeze inqubo yokuhlola ebhaliwe, esiyihlaziya ngokucophelela ukuze sinqume izindleko kanye nezidingo zesikhathi sokuhola. Izinqubo ze-FCT ezilula zingabandakanya izinyathelo ezilula ezifana nalezi:

  • Isetha ukunikezwa kwamandla.
  • Ivula ukunikezwa kwamandla.
  • Ukuqinisekisa imilayezo ethile kusibonisi noma ukwenziwa kusebenze kwama-LED aqokiwe.

Amanye amaklayenti ahlanganisa ama-LED emiklamo yawo ngokusobala ukuze abonise ama-voltage alungile okusebenza ezindaweni ezithile zebhodi. Nakuba le ndlela ingase idle isikhala esengeziwe sebhodi, yenza inqubo yokuhlola ibe lula futhi inciphise isidingo se-ICT ebanzi.

I-DFT yokuhlolwa kwe-In-Circuit

Ngakolunye uhlangothi, i-ICT isebenzisa indlela yebhokisi elimhlophe. Onjiniyela bethu bokuhlola baqapha ngokucophelela i-voltage ngayinye kanye namazinga amanje kuma-PCB aqediwe, okungenzeka basebenzise izinqubo ze-firmware zesinyathelo nesinyathelo. I-ICT ijula ​​kakhulu kune-FCT, idinga isikhathi esiningi nezinsiza. Kodwa-ke, iphumelela kakhulu ekuhlonzeni izinkinga ezingaba khona ku-PCB kuze kufike ezintweni ezingazodwana.

I-ICT isebenza kahle kakhulu kumaphrojekthi Womhlangano we-Prototype PCB, lapho amanani aphansi e-oda anciphisa umthelela wezikhathi zokuhlola ezandisiwe. Ukuze ulungiselele ama-oda amaningi e-ICT, ungadizayina into yokuhlola. Lolu hlelo luqondisa ukuhlolwa ngokusivumela ukuthi sihlole ngokushesha imihlangano ye-PCB, efana ne-Bed of Nails PCB Testing yama-PCB angenalutho. Kungenjalo, okuhlanganisa izindawo zokuhlola ezimisiwe kumhlangano we-PCB kwenza inqubo yokuhlola ibe lula futhi kuthuthukisa ukusebenza kahle.

Kwa-Highleap, sibeka phambili ikhwalithi nokusebenza kuyo yonke inqubo yethu Yomhlangano we-PCB. Izigaba eziningi zokuhlola, okuhlanganisa i-E-Test, Visual Inspection, AOI, kanye ne-AXI yezingxenye ezingenamthofu, ziyingxenye yezindlela zethu zokuhlola ezizenzakalelayo. Ukwengeza, amakhasimende ethu ayakwazi ukucela izindlela zokuhlola ezengeziwe, ezihlanganisa i-ICT ne-FCT, kuye ngezidingo zawo ezithile.

Ithimba lethu lesevisi elizinikele eliqeqeshiwe liqinisekisa ukuthi okukukhathazayo kusingathwa ngakho ngokuphelele. Sihlola ngokucophelela amafayela e-Gerber kanye ne-bill of material (BOM) ukuze kuhlolwe i-Design for Manufacturing (DFM) kanye ne-DFT. Ukuxhumana nethimba lethu kunezihibe, kuneziteshi eziningi ezitholakalayo, okuhlanganisa i-imeyili, amafomu aku-inthanethi, nezinanyathiselwa. Sicela wabelane nathi ngezinto ezikukhathazayo, futhi sizokunikeza ngokushesha isisombululo esifanele esihambisana nezidingo zakho ezihlukile zomhlangano we-PCB.