I-Demystifying BGA Soldering: Amathiphu Nemikhuba Engcono Kakhulu

Ubuchwepheshe be-BGA PCB bunikeza izinzuzo ezimbalwa ngaphezu kwama-IC anentambo, okwenza kube ukukhetha okuncanyelwayo kwemihlangano yesimanje ye-elekthronikhi. Lezi zinzuzo zihlanganisa izindlu ezincane, ukupakisha okuphezulu nokuminyana kwamaphini, izakhiwo zokudlulisa isignali ezithuthukisiwe, kanye nokuxhuma okungcono okushisayo ebhodini lesekethe. Izinhlobo zakamuva zezingxenye ze-BGA, njenge-VFBGA (I-BGA Enhle Kakhulu), ifaka amaphinikhodi okuxhumana ayizinkulungwane ezimbalwa anephimbo elingaphansi kuka-0.5mm, okuvumela ukuminyana okukhulu kokuhlanganisa.

Ngesikhathi sokuhlanganiswa kwezingxenye ze-BGA PCB, kusetshenziswa inqubo yokuhlanganisa, lapho izici eziningi zingena khona. Umphumela wale nqubo ngokuvamile uwukuphela kwe-matte, okubonisa amazinga aphezulu okuthembeka phakathi kwebhola nebhodi lesifunda, kanye nokuzinza okuphezulu kwemishini yesikhathi eside, ubuqotho besakhiwo bomzimba webhola, ukuqhutshwa kwe-conductivity, ubuqotho besignali kagesi, nokumelana nokushisa izikhonkwane ezingomakhelwane.

Ukusebenzisana phakathi kwezindawo ezibonakalayo kanye nezakhiwo zikagesi eziwumphumela kubalulekile ekuqondeni ukuziphatha kwezingxenye ze-BGA PCB. Inqubo ye-soldering ihilela ukuncibilika kwamabhola e-solder nge-solder paste, ukwakha ukusabela kwamakhemikhali ebusweni bebhodi lesifunda, okwenza indawo ye-intermetallic. Indawo efanayo ye-intermetallic ikhona phakathi kwe-chip nomzimba webhola, okumele izinze kuleveli ye-miliohm.

Naphezu kokuqonda kwethiyori, ukusetshenziswa okusebenzayo kungaholela emaphutheni, kokubili okuhlelekile nokungahleliwe, okungathinta kakhulu imingcele kagesi. Ngisho nejoyinti le-solder elibukeka kahle aliqinisekisi ukukhululeka emaphutheni, njengoba izinkinga ezifana namajoyinti e-solder athambile noma amafutha asengenzeka, athinte ukuthintana kukagesi.

Izinga le-IPC-A-610E lidlala indima ebalulekile ekuhloleni amajoyinti athengiswayo e-BGA PCB, ecacisa indlela yokwamukela yama-electronicssemblies. Kubalulekile ukuthi izinhlelo zokukhiqiza ziqinisekise ukuhambisana naleli zinga, njengoba amajoyinti e-solder angazinzile angaphuka ngaphansi kwengcindezi yemishini, okuholela ekulahlekelweni kokusebenza kukagesi. Kodwa-ke, kubalulekile ukuqaphela ukuthi amaphutha amaningi ahlobene nokuma komzimba we-solder anemiphumela ephawulekayo kagesi ngamanani amakhulu.

I-BGA Storage Management

Ubuchwepheshe kanye nemishini yokusongelwa kwe-BGA kubalulekile, kodwa ukuphathwa kwesitoreji se-BGA akufanele kunganakwa. Izingxenye ze-BGA ziyizingxenye ezizwela kakhulu ekushiseni futhi kumele zigcinwe ngaphansi kwezimo zokushisa ezilinganayo nezomile. Okulandelayo, ake sibheke ukuphathwa kwesitoreji se-BGA.

• Indawo yokubeka: 20-25℃, umswakama ongaphansi kuka-10% RH.
• Izimo zokubhaka: izinga lokushisa 125℃, umswakama ohlobene ≤60%RH.
• Indawo yokusebenzela: izinga lokushisa elizungeze 25℃, umswakama 55%RH.

I-J-STD-020 izinga lokuzwela umswakama

Isikhathi sokubhaka se-BGA

Ukuphrinta I-Stencil Stencil Design

I-BGA soldering ephelele ayinakuhlukaniswa ne-BGA Steel Stencil. Amapharamitha alandelayo angabhekiselwa ku-BGA Steel Stencil:

1: Ukusebenzisa i-electric polishing + laser steel stencil mesh —– Ukuvula ububanzi ngu-0.1mm

2: Ukusebenzisa i-electroformed steel stencil mesh ——- Pitch=0.35mm CSP, epholishiwe Udonga lwembobo lushelela ngaphandle kwama-burrs, futhi i-solder paste inomthelela omuhle wokubhidliza Ukuvuleka okunembile, udonga lwembobo ebushelelezi, oluhlangabezana nezimfuneko zokuvula zezingxenye ezingu-0402, 0201.

Ukuvula izilinganiso zereferensi zezifanekiso zokuphrinta ze-solder:

Bheka ukuqaliswa okujwayelekile kwe-IPC: IPC 7525: Izinkombandlela Zokuklama Izitena Zensimbi

Uhlolojikelele lwezigaba zamaphutha ezijwayelekile ze-BGA soldering joints

Nakhu ukubuka konke okuthuthukisiwe kwezigaba zamaphutha ezihlanganyelwe ze-BGA PCB, kanye nolwazi olwengeziwe olumayelana nezindlela zokuhlola nobuchwepheshe:

Uhlolojikelele lwezigaba zephutha ezijwayelekile ze-BGA PCB Soldering Joints

1. I-Lotkorpus Engalungile:
   • Ukubonakala Kwemishini/Optical: Umumo oyisiyingi ongalungile, indawo engalungile, izimbotshana (izimbobo), indawo engalungile, ibanga lebhola le-solder elingalungile, ukuntuleka kokuhleleka ngokubambisana.
   • Ukubukeka kukagesi: I-RBK (Ukumelana Phakathi Kwamadolo) ayishintshile neze, i-RBK = ∞ (ukuxhumana okuvulekile), ukujikeleza okufushane phakathi kwamabhola.
   • Izimbangela ezingase zibe khona: I-BGA-Chip (Ibhola), ikhwalithi yokunamathisela ye-solder, isicelo sokunamathisela i-solder, i-assembly offset, iphrofayili yokunamathisela, idizayini yephedi.
2. Ubuthakathaka Besibopho Phakathi Kwebhola Nokunamathiselwe Kwe-Solder (“Ikhanda Emcamelweni”):
   • Ukubonakala Kwemishini/Optical: Umumo oyindilinga olungile, ungqimba olungcolile phakathi kwebhola nokunamathisela kwe-solder, akukho mthamo wokuthwala umthwalo.
   • Ukubukeka kukagesi: I-RIZ (I-Resistance In Zone) = ∞ (ukuxhumana okuvulekile), ukuxhumana kwesikhashana ngomthwalo wemishini.
   • Izimbangela ezingase zibe khona: I-BGA-Chip (Ibhola), ikhwalithi yokunamathisela ye-solder, iphrofayili yokunamathisela.
3. Ubuthakathaka Besibopho Sezomthetho Phakathi Kwebhodi Le-Solder Elihlanganisiwe Nesifunda (“Iphedi Elimnyama”):
   • Ukubonakala Kwemishini/Optical: Umumo oyindilinga olungile, ungqimba olungcolile phakathi kwebhola nokunamathiselwe kwe-solder, imifantu endaweni ye-intermetallic, ukushintsha kombala kwephedi elimnyama, ukuqina komshini okuphansi (ukubhidliza).
   • Ukubukeka kukagesi: I-RIZ = ∞ (ukuxhumana okuvulekile), kuholela ekucindezelekeni kwemishini kokuxhumana kwesikhashana, i-RIZ ebangeni elijwayelekile, ukuxhumana kunqamuka ngaphansi komthwalo (i-solder evulekile ehlangene).
   • Izimbangela ezingase zibe khona: Ikhwalithi ye-PCB, iphrofayili yokunamathisela.

Ulwazi Olwengeziwe Ezindleleni Zokuhlola:

• Ukuhlolwa kwe-X-Ray (AXI): Isetshenziselwa ukuhlola okuzenzakalelayo ngokugcwele kwemihlangano ye-BGA, ihlangabezana nemibandela eyisisekelo njengokuhlola okuphelele ngokuya nge-IPC-A-610E, izinga eliphansi le-alamu elingamanga, nokusekelwa kwe-SPC.
• Ukuhlolwa kwe-X-Ray nge-Optical Inspection (AXOI): Ihlanganisa i-AXI ne-AOI ohlelweni olulodwa, ihlinzeka ngamakhono okuhlola okuhlangana kwe-BGA okuminyana kakhulu.
• Indlela Yokuskena Komngcele (IEEE1149.x): Indlela enokwethenjelwa esebenza ngaphandle kwe-adaptha, esetshenziselwa ukuthola ubuthakathaka besibopho sezomthetho namaphutha kumihlangano ye-BGA, ngisho nakuma-assembly aminyana kakhulu anamathrekhi kakhondatha ashumekiwe.
• 3D AXI Systems: Sebenzisa i-tomosynthesis ukuze uhlole kahle, uhlangabezane nemibandela ye-IPC-A-610 ehlobene namajoyinti e-solder e-BGA.

Lezi zindlela nobuchwepheshe bubalulekile ekuqinisekiseni ikhwalithi nokuthembeka kwamajoyinti asoda e-BGA PCB, ikakhulukazi ezindaweni zokukhiqiza ze-SMD zesimanje.

Ukuhlonza kanye nokubhekana namaphutha ajwayelekile e-BGA

Izingxenye ze-Ball Grid Array (BGA) zinikeza izinzuzo eziningi, kodwa futhi ziza nezinselele ezithile, ikakhulukazi phakathi nenqubo yokuhlanganisa. Ukuqonda nokubhekana nokukhubazeka okuvamile kwe-BGA kubalulekile ekuqinisekiseni ukwethembeka nokusebenza kwezisetshenziswa zikagesi. Nazi ezinye zezinkinga ezivame kakhulu nokuthi zingadambisa kanjani:

1. Ukungalungi kahle: Lokhu kwenzeka lapho i-PCB ne-BGA zingalungi kahle ngesikhathi sokugeleza kabusha, okuholela ekuxhumekeni okungalungile. Ukuze uvimbele ukungalungi kahle, sebenzisa imishini namasu afanele okubeka i-BGA futhi uqinisekise ukuthi ilungi kahle ngaphambi kokuyibopha.

2. Ukuphakama Okungaguquguquki Kokuma: Ukushiswa okungalungile kungabangela ukuthi i-BGA ihlale ekhoneni le-PCB, okubeka engcupheni ukuphepha kokuxhumeka. Ukuze ubhekane nalokhu, sebenzisa i-solder paste eyanele futhi uqinisekise ukuthi ukushisa nokupholisa okufanele ngesikhathi senqubo yokuphinda kugeleze ukuze kufinyelelwe ukuphakama okufanayo kokuma.

3. Amabhola Alahlekile: Amabhola alahlekile angabangela ukuthi izindawo zokuxhuma ezibalulekile zingabi khona emhlanganweni. Ukuze ugweme lokhu, qiniseka ukuthi uphatha kahle futhi ugcina ama-BGA ngaphambi komhlangano futhi uhlole amabhola alahlekile ngaphambi kokuwahlanganisa.

4. Ama-Pads Angamanzi: I-solder paste ephinde yageleza ingase ingamanzisi kahle i-pad, okuholela ekuxhumekeni okungaphelele. Ukuze uvimbele lokhu, qiniseka ukuthi ama-PCB ayahlanzwa kahle ngaphambi kokunamathisela bese usebenzisa i-solder paste efanele yokufaka isicelo.

5. Amabhuloho: Ukunamathisela okungaphezu kwe-solder phakathi kwama-deposit e-paste kungaholela emabhuloho phakathi kwama-point okuxhuma, okubangela ama-short. Ukuze uvimbele amabhuloho, sebenzisa inani elifanele le-solder paste futhi uqinisekise ukuthi i-stencil iklanywe kahle ukuze kufakwe i-paste.

6. Ukugeleza Okungaphelele: Ukugeleza Okungaphelele kungabangela ukumbozwa okunganele kwe-solder ebhodini. Ukuze ubhekane nalokhu, qiniseka ukuthi amaphrofayili okushisa nokupholisa afanele ngesikhathi sokugeleza kabusha futhi uhlole ukuthi awugelezanga kahle yini ngemva kokugoqa.

7. Ukugoqa: Ukugoqa kwenzeka lapho amabhola ehlangana ngesikhathi sokugoqa, okuholela ekufakweni kwama-shorts. Ukuze uvimbele ukugoqa, qiniseka ukuthi isitoreji esifanele kanye nokuphathwa kwama-BGA bese usebenzisa amaphrofayili afanele okugoqa kabusha.

8. Amasekethe Avulekile: I-solder ehluleka ukumanzisa i-PCB pad ingaholela kumasekethe avulekile. Ukuze uvimbele amasekethe avulekile, qiniseka ukuthi unamasu afanele okunamathisela futhi uhlole izinkinga zokumanzisa ngaphambi kokuhlanganiswa.

9. Ukuvala: Ukuvala kungenzeka lapho ukugeleza kwe-solder kuyeka ukuxhumana, ikakhulukazi ezingxenyeni ze-BGA ezigoqekayo. Ukuze uvimbele ukuvala, sebenzisa i-solder paste efanele futhi uqinisekise ukuthi kuyafudumala ngokwanele ngesikhathi sokugeleza kabusha.

Izinzuzo BGA Chips

Usayizi Omncane, Umthelela Omkhulu

Ama-chips e-BGA, noma ama-chips e-Ball Grid Array, ayisisombululo soguquko esiklanyelwe ukukhulisa ukusebenza kahle kwesikhala kumabhodi wesekethe, ikakhulukazi kumadivayisi amancane. Lo mklamo omusha uqeda isidingo sokuhamba phambili, esikhundleni salokho usebenzisa amabhola e-solder esisekelweni sephakeji yokuxhumeka kukagesi. Ngenxa yalokho, ama-BGA chips awagcini nje ngokugcina isikhala kodwa futhi avumela inhlanganisela yesekethe eminyene futhi eyinkimbinkimbi.

Idizayini Ehlangene Yokuthuthukisa Isikhala

Enye yezinzuzo ezibaluleke kakhulu zama-chip e-BGA ubukhulu bawo obuhlangene, obuvumela ukusetshenziswa okuphumelelayo kwesikhala sebhodi. Lesi sici sizuzisa kakhulu ekudaleni amadivaysi e-elekthronikhi azacile futhi amancane, lapho isikhala siphezulu kakhulu. Ngokususa imikhondo ephumile, ama-BGA chips avula indlela yemiklamo eshelelayo nelula kakhudlwana.

Ukuqondanisa Okunembayo Kokwethenjelwa

Ama-chips e-BGA akhiwe ngamajoyinti ayindilinga we-solder ahambisana ngokwemvelo nokupakishwa. Lesi sici sokuziqondanisa siqinisekisa ukuqondana okunembayo lapho i-chip ifakwe ebhodini lesifunda, okuthuthukisa ukwethembeka kukonke kwe-chip. Le ndlela yokuqondisa inciphisa kakhulu ingozi yamaphutha nokungahambisani phakathi nenqubo yokukhiqiza, okuholela emikhiqizweni yokugcina yekhwalithi ephezulu.

Ukukhiqiza Okungabizi kakhulu

Ukwakheka kwama-chip e-BGA kunegalelo ekukhiqizeni okuphezulu, ekugcineni kunciphisa izindleko zokukhiqiza. Uma kuqhathaniswa nezinye izinhlobo zama-chip, ama-chip e-BGA anikeza ikhambi elingabizi kakhulu ngenxa yobulula kanye nokufinyeleleka kwenqubo yokuvuselela nokususa i-solder. Lokhu kusebenza kahle kwezindleko kwenza ama-chip e-BGA abe inketho ekhangayo kubakhiqizi abafuna ukwenza ngcono izinqubo zabo zokukhiqiza.

Ukusebenza Kabusha Kabusha kanye Desoldering

Ama-chips e-BGA afaka amaphedi amakhudlwana, asiza ukusetshenzwa kabusha kanye nenqubo yokudiliza. Kungakhathaliseki ukuthi usebenzisa ibhavu le-solder noma umoya oshisayo, amaphedi amakhulu enza ukulungisa nokushintshanisa ngokushesha futhi kube lula. Lokhu kusebenza kahle kunciphisa isikhathi sokuphumula kanye nezindleko zokulungisa ezihlobene, okwenza ama-chip e-BGA abe yisinqumo esisebenzayo samadivayisi kagesi adinga ukulungiswa njalo.

Ukusebenza Okuthuthukisiwe Kokusebenza Okuthuthukisiwe

Usayizi omncane kanye nokuhlanganisa okuningi kwama-chip e-BGA kuholela ekusebenzeni okuphezulu uma kuqhathaniswa nezinye izinhlobo zama-chip. Lokhu kukhula kwe-conductivity kunciphisa amathuba okuthikamezeka kwesignali, okwenza ama-chip e-BGA alungele amasekhethi anesivinini esikhulu kanye namaza aphezulu. I-conductivity ephakeme kakhulu yama-chips e-BGA iqinisekisa ukusebenza kahle ezinhlelweni ezifunwayo.

Ukuphatha Okushisayo Okusebenzayo

Ama-chips e-BGA ahamba phambili ekuhlakazweni okushisayo, ukuphatha kahle ukushisa ukuze kugcinwe ukusebenza kahle. Idizayini yama-chips e-BGA ithuthukisa ukusebenza kahle kokudlulisa ukushisa, iqinisekisa ukuthi i-chip ihlala ipholile ngisho nangaphansi kwemithwalo esindayo. Ukwengeza, ama-chips e-BGA angasetshenziswa ngokuhambisana nezingxenye zokususa ukushisa njengamasinki okushisa noma ama-thermal vias ukuze kuthuthukiswe amandla awo okuphatha okushisayo.

Sekukonke, ama-chip e-BGA anikeza izinzuzo eziningi ezenza abe ukukhetha okuthandwayo kwabakhiqizi abafuna ukwenza ngcono isikhala, ukuthembeka, kanye nokusebenza kumadivayisi abo kagesi. Ngomklamo wawo omncane, ukuhambisana okunembile, ukukhiqizwa okungabizi kakhulu, amakhono okuphinda asebenze kahle, ukuhanjiswa kwamandla aphezulu, kanye nokuphathwa kokushisa okuphumelelayo, ama-chip e-BGA ayisisombululo esinamandla sama-electronics anamuhla.

Uma iphrojekthi isuka ocwaningweni iye kwi-RFQ, buyekeza umklamo we-microvia kanye ne-HDI kanye namanothi e-PCB okuguqula amandla ukuze izinto zokwakha, inqubo, kanye nezidingo zokuhlola zihlale zihambisana.

Kungani Khetha i-Highleap Electronics yezidingo zakho ze-PCB&PCBA

I-Highleap Electronics iyinketho yakho yokuqala yokukhiqiza i-PCB ne-PCBA, ngenxa yolwazi lwethu olubanzi nobungcweti. Ngeminyaka yolwazi lwemboni, sihlala siletha ama-PCB aphezulu kanye nemihlangano ye-PCBA ehlangabezana noma edlula izindinganiso eziphakeme kakhulu. Ithimba lethu elizinikele lochwepheshe liqinisekisa ukwaneliseka kwakho zonke izinyathelo zendlela, kusukela ku-prototype kuya ekukhiqizeni.

Izinsiza Zesimo Sezobuciko Nezinketho Zokwenza Ngokwezifiso

Izikhungo zethu zesimanje zifakwe ubuchwepheshe obuphambili, obusivumela ukuthi sinikeze izinhlobonhlobo zezinketho zokwenza ngokwezifiso ukuhlangabezana nezidingo zakho eziyingqayizivele ze-PCB ne-PCBA. Kungakhathaliseki ukuthi udinga ukuqhutshwa kwe-prototype encane noma ukukhiqizwa kwenani elikhulu, singalungisa amasevisi ethu ukuze afanele izidingo zakho. Ukuzibophezela kwethu ekuqinisekiseni ikhwalithi kuqinisekisa ukuthi yonke i-PCB ne-PCBA eshiya indawo yethu isezingeni eliphezulu kakhulu futhi inokwethenjelwa.

Amanani Ancintisanayo Nokwaneliseka Kwekhasimende

Siyakuqonda ukubaluleka kwezixazululo ezingabizi kakhulu kwa-Highleap Electronics. Kungakho sinikeza amanani ancintisanayo ngaphandle kokuyekethisa ikhwalithi yama-PCB ethu nemihlangano ye-PCBA. Ukugxila kwethu ekwanelisekeni kwamakhasimende kuqhuba konke esikwenzayo, kusukela ekunikezeni isevisi eyingqayizivele nokusekelwa kuya ekuletheni ama-PCB akho kanye nemihlangano ye-PCBA ngesikhathi nangaphakathi kwesabelomali. Khetha i-Highleap Electronics yezidingo zakho ze-PCB ne-PCBA futhi uzizwele umehluko ngokwakho.

Isiphetho

Ngesikhathi sokuhlanganiswa kwezingxenye ze-BGA PCB, kusetshenziswa inqubo yokuhlanganisa, lapho izici eziningi zidlala indima ebalulekile. Umphumela wale nqubo ngokuvamile uwukuphela kwe-matte, okubonisa ukwethembeka okuphezulu phakathi kwebhola nebhodi lesifunda, kanye nobuqotho besakhiwo, ukuqhutshwa kwe-conductivity, ubuqotho besignali kagesi, kanye nokumelana nokufakwa kwamaphinikhodi angomakhelwane bomzimba webhola. Naphezu kokuqonda kwethiyori, ukusetshenziswa okusebenzayo kungaholela emaphutheni, kokubili okuhlelekile nokungahleliwe, okuthinta kakhulu imingcele kagesi. Ngisho namajoyinti e-solder abukeka kahle awaqinisekisi ukukhululeka emaphutheni, njengoba izinkinga ezifana namajoyinti athambile noma amafutha asengaqhubeka, athinte ukuthintana kukagesi.