Umhlangano we-PCB Othembekile Kakhulu: Ukulawulwa Kwenqubo Nokulandelela

I-Highleap Electronics ikhiqiza izinhlangano ze-PCB ezinokwethenjelwa kakhulu zemikhiqizo lapho ukwehluleka kwensimu kunemiphumela engaphandle kokubuyiselwa kwewaranti: amadivayisi ezokwelapha, ama-elekthronikhi ezimoto, izinhlelo zokulawula zezimboni kanye namandla, imishini yezindiza kanye nezokuvikela, kanye nengqalasizinda okumele isebenze inganakekelwa iminyaka eminingi. Sakha amabhodi angenalutho futhi siwahlanganise ngokwesigaba somsebenzi, izinto zokwakha kanye nezinyathelo zokuqinisekisa ezichazwe ezidingweni zakho.

Ukuthembeka okuphezulu akuyona ilebula esetshenziswa ekugcineni komugqa. Kubekwa yizinqumo ezintathu ezenziwe ngaphambi kokwakhiwa: izindlela zokwamukela amabhodi akhiwa futhi ahlolwa kuzo, izinto zokwakha kanye nezinqubo ezinquma ukuthi amalunga okuhlanganisa kanye nama-laminate aguga kangakanani, kanye nobufakazi umenzi okumele abunikeze bokuthi ingxenye ngayinye ihlangabezana nesidingo. Leli khasi lichaza ukuthi lezo zinqumo zihumusha kanjani zibe yincazelo ye-PCBA, ukuthi yiziphi izinqubo nezivivinyo ezibalulekile, nokuthi yini okufanele uyiqinisekise lapho umkhiqizi efanela.

Ukuchaza Izidingo Zokuthembeka Okuphezulu ze-PCBA

“Ukuthembeka okuphezulu” kusho izinto ezahlukene ezimbonini ezahlukene. I-oda lokuthenga elithi “ukuthembeka okuphezulu” lishiya umenzi eqagela, futhi abahlinzeki ababili bazocaphuna imikhiqizo emibili ehlukene. Imfuneko ewusizo ithi okulandelayo:

Izinhlelo zekhwalithi yemboni zengeza okulindelwe kwazo: I-ISO 13485 yamadivayisi ezokwelapha, i-IATF 16949 yamaketanga okuhlinzeka ngezimoto, kanye nezidingo zamakhasimende ezindiza kanye nezokuvikela. Izitifiketi zekhwalithi zesistimu ye-Highleap zibhalwe ekhasini lethu lezitifiketi ; chaza izinga lomkhiqizo wakho eliwela ngaphansi kwalo ku-RFQ ukuze amadokhumenti okwakha ahlelwe kusukela eqoqweni lokuqala.

Umhlangano Wekilasi 3 le-IPC: Yiziphi Izinguquko Emgqeni

Izinhlelo eziningi ezinokwethenjelwa okuphezulu zichaza i-IPC Class 3. Umehluko ku-Class 2 awuwona umshini ohlukile, uyifasitela lokwamukela elincane kanye nomzamo omkhulu wokuhlola, yingakho amabhodi e-Class 3 ebiza kakhulu.

• Ukugcwaliswa kwembobo embobeni okufakwe ipuleti: Isigaba sesi-3 sidinga ukugcwaliswa okuphezulu kwe-solder okuqondile okunezimbobo zokungena kuneSigaba sesi-2. Amabhodi aqinile kanye nokuxhumeka ezindizeni ezinkulu zethusi kudinga izinqubo zokungena ezimbobeni kanye nomklamo wokushisa ofinyelela kuwo.
• Ukubekwa kwengxenye: ukulenga ohlangothini okuvunyelwe kanye nokususwa kokuhlangana kokugcina kuncane, ngakho-ke ukunemba kokubekwa kanye nokwakheka kwephedi kumele kushiye umkhawulo omncane wephutha.
• Iphrofayili yokumanzisa kanye nokuhlangana kwamalunga: izimo ezamukelwa njengezinkomba zenqubo ku-Class 2 zingaba amaphutha ku-Class 3.
• Ibhodi elingenalutho: I-IPC-6012 Isigaba sesi-3 sidinga ithusi elinodonga olunemigodi emikhulu kanye namasongo amakhulu ahlanganisiwe, okuthinta ukwakheka kwe-drill kanye ne-pad.

Isigaba sesi-3 kufanele sichazwe esigabeni sokuklama, hhayi ukungezwa esigabeni soku-oda. Ukwakheka okuklanyelwe imithetho yephedi yesigaba sesi-2 kanye nendandatho ehlanganisiwe kungase kungabi yinto ekhiqizwe kwisigaba sesi-3 ngaphandle kwezinguquko. Ukuqhathanisa kwethu i- IPC Class 2 vs Class 3 PCB assembly kuhlanganisa umehluko wokwamukelwa ngokuningiliziwe.

Ingabe Wonke Amabhodi AseMkhiqizweni Othembekile Kakhulu Adinga Ibanga 3?

Akunjalo ngaso sonke isikhathi. Ukucacisa iKlasi 3 kuphela lapho umsebenzi udinga khona, isibonelo ibhodi yokulawula kodwa hhayi ibhodi yesibonisi sokubonisa, kungalawula izindleko. Isinqumo kufanele senziwe yithimba lobunjiniyela bomkhiqizo ngokusekelwe emiphumeleni yokwehluleka kanye nendinganiso yemboni esebenzayo.

Ibhodi Elingenalutho kanye Nokukhetha Izinto Ezithinta Ukuthembeka

Ukwehluleka okuningi kwensimu isikhathi eside kuqala ebhodini elingenalutho kunasezingosini zokufaka insimbi. Ukujikeleza kwe-thermal kucindezela imigodi efakwe ngaphakathi kwe-axis ye-Z; ukugeleza kabusha okuphindaphindiwe kanye nokulungiswa kabusha kugcizelela i-laminate; ukukhula kwe-filament ye-anodic eqhubayo kungenzeka phakathi kwemigodi eseduze kakhulu ezindaweni ezinomswakama.

• I-Laminate Tg kanye nokushisa kokubola: ukugeleza kabusha okungenalo umthofu, ukuhlanganiswa okunezinhlangothi ezimbili kanye nokulungiswa kabusha kudinga ama-laminate alinganiswe ngohambo oluningi lokushisa.
• Ukwandiswa kwe-Z-axis: i-Z-axis CTE ephansi inciphisa ukucindezeleka kuma-barrel acwebezelwe ngesikhathi sokujikeleza kokushisa, okubalulekile kumabhodi aqinile, anezingqimba eziphakeme.
• Ngesakhiwo: ama-microvia ahlanganisiwe, ama-via agcwele kanye ne-via-in-pad adinga ukufaneleka kwenqubo; ama-microvia ahlanganisiwe avame ukuthandwa lapho umkhawulo wokuthembeka ubalulekile khona.
• Ukuqedwa kwendawo: I-ENIG, i-ENEPIG, isiliva lokucwilisa kanye ne-OSP ziyahlukahluka ngokuphila kweshelufu, ukuba yisicaba kanye nokuziphatha kwamalunga. Khetha ngokusekelwe ezingxenyeni kanye nesikhathi sokugcina ngaphambi kokuhlanganiswa.

Amabhodi angenalutho ezinhlelo zokuthembeka okuphezulu kufanele aqinisekiswe, hhayi ukuthi athathwe. Ukuhlaziywa kwe-microsection yamakhuphoni kanye nokuhlolwa kokuthembeka kwemigodi ehlanganisiwe njengokuhlolwa kokucindezeleka kokuxhumana kunikeza ubufakazi bokuthi isakhiwo se-via siyasinda ekujikelezeni kokushisa.

Izilawuli Zenqubo Zamajoyinti Athembekile E-Solder

Ijoyinti elithembekile linomthamo ofanele we-solder, ukumanzisa okuphelele kanye nokuphuma okulinganiselwe. Ngayinye ivela esinyathelweni senqubo esilawulwayo kunokuba ihlolwe okokugcina.

Ukuphrinta kwe-Solder Namathisela

Amaphutha amaningi e-SMT aqala ephrintani. Ubukhulu be-stencil kanye nomklamo wokuvula kulawula ivolumu yokunamathisela; ukuhlolwa kokunamathisela kwe-solder kulinganisa ivolumu yokufaka kanye nendawo ngaphambi kokubekwa, ngakho-ke amadiphozithi anganele noma ahlanganisiwe ayabanjwa ngaphambi kokuba abe amalunga.

Ukuphinda kuphrofayili

Iphrofayili imiselwe ibhodi langempela, kanye nama-thermocouple ezingxenyeni ezisindayo nezibucayi kakhulu. Ama-BGA amakhulu, izindiza zethusi ezijiyile kanye nama-passive amancane ebhodini elifanayo adinga iphrofayili ewamanzisa wonke ngaphandle kokushisa noma yiliphi lawo.

Ukuvala Ngaphansi Kwama-Thermal Pads

Ama-voids ngaphansi kwe-QFN kanye nama-thermal pad edivayisi yamandla anciphisa ukudluliselwa kokushisa kanye namandla amalunga. Ama-stencil avuleke ngamafasitela kuma-pads amakhulu, ngokwelashwa kanye nokulungiswa kwephrofayili anciphisa ukuvaleka, kanti ukulinganiswa kwe-X-ray kuqinisekisa umphumela. Uma isicelo sakho sinomkhawulo wokuvaleka, bhala lokho ezidingweni.

Umswakama, i-ESD kanye nokuhlanzeka

Amadivayisi azwela umswakama aphathwa ngokwesilinganiso sawo se-MSL futhi abhakwe lapho isikhathi sokuphila phansi sidlula, ukuvimbela ukuqhekeka kwephakeji ngesikhathi sokugeleza kabusha. Izinsalela ze-flux ezamukelekayo emikhiqizweni yabathengi zingabangela ukuvuza noma ukugqwala ekusetshenzisweni okumanzi noma okunamandla aphezulu; uma umkhiqizo udinga ukuhlanzwa nokuqinisekiswa kokuhlanzeka kwe-ionic, chaza lokho.

Ukuhlolwa, Ukuhlolwa kanye Nokuvikelwa Kwebhodi

Ngemikhiqizo enokwethenjelwa okuphezulu, ukuhlolwa nokuhlolwa kuhlelwa njengezingqimba lapho ngayinye ibamba khona lokho okwedlule okungenakukwazi.

Ukuhlolwa kokushiswa ngaphakathi kuchazwe yikhasimende ngokwephrofayili yobungozi bomkhiqizo; kwengeza izindleko nesikhathi futhi kuwusizo kakhulu lapho ukwehluleka kwasebuntwaneni kubiza kakhulu ukukuthola ensimini.

Ukuvikela Okuhlanganisiwe Nokugqokwa Kwemishini

Amabhodi abekwe emswakama, ekujiyileni, othulini noma ekungcolisweni ngamakhemikhali ngokuvamile adinga ukumbozwa ngendlela eqondile . Cacisa uhlobo lokumbozwa, izindawo okufanele zimbozwe (izixhumi, izindawo zokuhlola, izingxenye ezilungisekayo) kanye nesidingo sobukhulu. Izingxenye ezisindayo ezindaweni zokudlidliza zingadinga futhi ukunamathisela okunamathelayo noma ukugcwalisa okungaphansi, okufanele kuboniswe kumdwebo wokuhlanganisa.

Ukulandelela kanye nokulawula ushintsho

Uma umkhiqizo onokwethenjelwa okuphezulu uhluleka ensimini, uphenyo luncike kumarekhodi okwakha. Ngaphandle kwawo, impendulo ephephile kuphela ukuphatha yonke iyunithi njengokusolisayo.

• Ukuhlonza izinga lebhodi: inombolo yochungechunge noma ikhodi yelothi ebhodini ngalinye, exhunywe kurekhodi lokwakha.
• Amarekhodi ezindawo zezingxenye: amakhodi edethi kanye nezinombolo zezingxenye ezibalulekile, ezixhunywe nebhodi. Vumelana ukuthi yiziphi izingxenye ezidinga lokhu, ngoba ukulandelela okuphelele kwezingxenye zezingxenye ze-passive kwengeza izindleko.
• Amarekhodi enqubo: iphrofayili yokugeleza kabusha, ukuhlolwa kanye nemiphumela yokuhlolwa ngenani noma inombolo yochungechunge.
• Isaziso sokushintsha: akukho ushintsho ezintweni zokwakha, izingxenye, inqubo noma indawo yokukhiqiza ngaphandle kwemvume yamakhasimende. Lesi ngokuvamile yisigaba esibaluleke kakhulu esivumelwaneni sokunikeza esinokwethenjelwa okuphezulu.

Ikhasi lethu lokulandelela i-PCB lichaza amarekhodi angagcinwa nokuthi axhumeka kanjani ekuthunyelweni ngakunye.

Ubuqiniso Bengxenye

Izingxenye mbumbulu noma ezingaphathwanga kahle ziyingozi yokwethembeka okungekho nqubo yokuhlanganisa engakulungisa. Ngezinhlelo zokuthembeka okuphezulu, izingxenye kufanele zithengwe kubakhiqizi noma kubasabalalisi abagunyaziwe, nganoma yikuphi okuhlukile okuvunyelwe yikhasimende. Bhala le mfuneko, kanye nanoma iyiphi ikhodi yosuku noma ukuqoshwa kwenqwaba okudingayo, ku-RFQ ukuze yakhelwe ohlelweni lokuthola izingxenye zohlelo lwakho.

Ukufaneleka Komkhiqizi We-PCBA Othembekile Kakhulu

Isitifiketi sibonisa ukuthi kukhona uhlelo lwekhwalithi. Asibonisi ukuthi ibhodi elithile lizokwakhiwa kanjani. Ngesikhathi sokufaneleka komhlinzeki, cela ubufakazi obusebenza kumkhiqizo wakho:

• Izitifiketi zezinga lesistimu yekhwalithi elidingwa yimboni yakho, kanye nobubanzi obumboza ukuhlanganiswa kwe-PCB.
• Indlela ukwamukelwa kweKlasi 3 okusetshenziswa ngayo futhi kuqinisekiswa ngayo emgqeni, kanye nendlela abahloli abaqeqeshwa ngayo ngezindinganiso ze-IPC.
• Umbiko wesihloko sokuqala oyisibonelo kanye nerekhodi lesampula lesabelo, ukuze ubone ukuthi yibuphi ubufakazi obuthunyelwa nesabelo ngasinye.
• Indlela umkhiqizo ongahambisani nomthetho ophathwa ngayo: ukuhlukaniswa, ukuhlelwa kabusha, ukuhlaziywa kwembangela kanye nesenzo sokulungisa.
• Inqubo yesaziso soshintsho kanye nendlela ukuvunyelwa kwamakhasimende okuqoshwa ngayo.
• Kungakhathaliseki ukuthi ibhodi elingenalutho lenziwe ngaphakathi noma liyathengwa, nokuthi ikhwalithi yebhodi elingenalutho iqinisekiswa kanjani kunoma yikuphi.

Sincoma ukuthi ufaneleke ngesihloko sokuqala esakhiwe kumkhiqizo wakho wangempela. Isihloko sokuqala kanye nerekhodi lesabelo kubonisa ukuthi izidingo zisetshenziswe kanjani empeleni, okuyinto uhlu lwemibuzo lwamakhono olungenakukwazi ukuyenza. Izinhlelo ezithile zemboni zichazwe emakhasini ethu okuhlanganisa i-PCB yezokwelapha kanye namakhasi okuhlanganisa i-aerospace kanye ne-PCB yokuzivikela.

Imibuzo Evame Ukubuzwa Yomhlangano We-PCB Othembekile Kakhulu

Ingabe ukuhlanganiswa kwe-PCB okunokwethenjelwa okuphezulu kuyafana ne-IPC Class 3?

Isigaba sesi-3 yisidingo sobuciko esivame kakhulu ezinhlelweni zokuthembeka okuphezulu, kodwa ukuthembeka kuncike ezintweni zokwakha, ukwakheka, ukulawulwa kwenqubo, isu lokuhlola kanye nokulandelela. Ibhodi lingahlolwa kusigaba sesi-3 bese lihluleka kusenesikhathi uma i-laminate noma isakhiwo esidlulayo singafanelekeli indawo yaso yokushisa.

Kubiza malini ukuhlanganiswa kwekilasi lesi-3?

Ukwanda kuncike ebhodini. Kuvela emafasiteleni enqubo aqinile, umzamo wokuhlola nokulungisa kabusha owengeziwe, imibhalo eyengeziwe kanye nezinguquko zokuklama noma zezinto ezibonakalayo ngezinye izikhathi. Caphuna zombili izigaba uma unquma ukuthi yiliphi ozolicacisa.

Ungakwazi yini ukwakha ngokwezidingo zethu zomsebenzi?

Yebo, uma nje ihlinzekwa ne-RFQ. Lapho imininingwane yekhasimende ihlukile kweye-IPC-A-610, idokhumenti yekhasimende kufanele isho ukuthi iyiphi eza kuqala.

Ingabe uyayisekela i-solder equkethe i-lead emikhiqizweni enokwethenjelwa okuphezulu?

Eminye imikhiqizo yezindiza, yezokuvikela kanye neyezokwelapha ayifakiwe ku-RoHS futhi icacisa i-tin-lead solder. Chaza isidingo se-solder alloy ku-RFQ ukuze sikwazi ukuqinisekisa inqubo kanye nokuqedwa kwezingxenye.

Ingabe amabhodi angambozwa futhi ahlolwe ngaphambi kokuthunyelwa?

Yebo. Ukugqoka okujwayelekile, ukuhlolwa okusebenzayo kanye nokushiswa kungafakwa uma kuchazwe. Izinqubo zokuhlola kanye nemigomo yokupasa kufanele kunikezwe noma kuvunyelwane ngesikhathi sokucaphuna.