Izinhlobo Zephakheji ye-IC Ezichazwayo: I-BGA vs QFN vs QFP, kanye Nendlela Yokukhetha I-PCB Yakho

Iphakheji ye-IC iyisivikelo esizungeze i-chip ye-silicon esiyivikelayo futhi siyixhumanise nebhodi — futhi iphakheji oyikhethayo (i-BGA, i-QFN, i-QFP, nabanye) ibumba usayizi webhodi, ukuziphatha kokushisa, inqubo yokuhlanganisa, kanye nezindleko. Ukukhetha efanele kuyisinqumo sokukhiqiza njengesinqumo sikagesi. Lo mhlahlandlela uchaza izinhlobo eziyinhloko zephakheji ye-IC, ukuthi ezidumile ziqhathaniswa kanjani, ukuthi ukupakisha kuthinta kanjani ukuhlanganiswa, nokuthi i-Highleap Electronics ihlanganisa kanjani yonke inhlobo yephakheji ngokwethembeka.

1. Iyini iphakheji ye-IC futhi yenzani?

Iphakheji ye-IC iyisivikelo esihlanganisa idayisi ye-semiconductor futhi inikeza ukuxhumana kukagesi — ama-lead, amaphini, noma amabhola — kusukela ku-chip kuya ku-PCB. Yenza izinto ezintathu: ivikela i-silicon ebuthakathaka ekulimaleni ngokomzimba nangokwemvelo, ivulela ukuxhumana okuncane kwedayisi ebhodweni elifakwa ebhodini, futhi inikeza indlela yokushisa ephuma ku-chip. Ngaphandle kokupakishwa, idayisi engenalutho ayinakuphathwa, ixhunywe, noma ipholiswe ekukhiqizweni okuvamile.

Iphakheji iphinde ichaze indlela i-chip ehlanganiswa ngayo ebhodini — kungakhathaliseki ukuthi inezikhonkwane zemigodi, izintambo zokufaka ubuso, noma uhla lwamabhola ngaphansi. Lokho kukhetha ukupakisha kuhamba kahle kulo lonke ibhodi: usayizi walo, ukwakheka kokushisa, inqubo yokuhlanganisa, kanye nezidingo zokuhlola. Ngenxa yokuthi iphakheji isendaweni emngceleni phakathi kwe-chip nebhodi, ixhumene kakhulu nobuchwepheshe be-substrate bezingxenye ezithuthukisiwe, njenge- IC-substrate PCBs kanye ne -BGA substrates ezihambisa ukuxhumana kwe-die ngaphakathi kwephakheji uqobo.

2. Izinhlobo zamaphakheji e-IC: imbobo edlulayo, i-SMT ene-lead, kanye ne-array

Amaphakheji e-IC ahlukaniswa ngemindeni emithathu ebanzi: imbobo edlulayo (izikhonkwane ezifakwe emigodini, njenge-DIP), indawo yokufaka engaphansi enama-lead (ama-lead ahlanganiswe endaweni, njenge-QFP ne-SOIC), kanye namaphakheji e-array (ukuxhumeka ngaphansi, njenge-BGA ne-QFN). Umndeni ngamunye umele isinyathelo esibheke kusayizi omncane kanye nobuningi bokuxhumeka obuphezulu, futhi umndeni ulawula kakhulu indlela yokuhlanganisa:

Amaphakheji angena ngembobo yiwona amakhulu futhi alula ukuwathengisa ngesandla kodwa asebenzisa isikhala esiningi; amaphakheji e-SMT ane-lead ane-lead efinyelelekayo emaphethelweni awo; futhi amaphakheji e-array abeka ukuxhumana ngaphansi komzimba ukuze kube nobukhulu obukhulu kanye nonyawo oluncane kakhulu. Umkhuba ngokuhamba kwesikhathi ube ngamaphakheji e-array njengoba amadivayisi encipha, okuphakamisa izidingo zokuhlanganiswa nokuhlolwa - ukuhweba okuhlolwe ezigabeni ezilandelayo, futhi kubonwe ekuqhathanisweni kwamaphakheji njenge -BGA vs. i-LGA.

3. I-BGA vs QFN vs QFP: uyini umehluko?

I-QFP inama-lead asukela kuzo zonke izinhlangothi ezine ukuze kube lula ukuwahlola, i-QFN inama-pads emaphethelweni angezansi angenawo ama-lead anwetshiwe ukuze kube nomkhawulo omncane, kanti i-BGA inenqwaba yamabhola e-solder ngaphansi kwayo ukuze kube nenani eliphezulu lokuxhumeka. Umehluko ukuthi ukuxhumana kukuphi nokuthi kufinyeleleka kangakanani, okushintshanisa ukukwazi ukuhlolwa ngokumelene nobuningi:

• I-QFP (Iphakheji Le-Quad Flat) inezintambo ze-gull-wing kuzo zonke izinhlangothi ezine; izintambo ziyabonakala futhi kulula ukuzihlola nokuzilungisa kabusha, okwenza kube lula ukuzihlanganisa — imininingwane ekulesi sithombe ku- Amaphakheji e-QFN vs QFP.
• I-QFN (I-Quad Flat No-lead) inama-pads emaphethelweni angezansi futhi ngokuvamile i-central thermal pad, engenazo izintambo ezinde — ezincane futhi ezingcono ngokwezinga lokushisa, kodwa amalunga angaphansi komzimba futhi kunzima ukuwahlola, ambozwe I-BGA vs QFN.
• I-BGA (I-Ball Grid Array) isebenzisa uhla lwamabhola e-solder kulo lonke uhlangothi olungaphansi, inikeza ukuxhumana okuningi endaweni encane — kodwa wonke amalungu afihliwe, adinga i-X-ray ukuqinisekisa, njengoba kuxoxwe ngakho ku I-BGA soldering.

Iphethini icacile: njengoba uhambisa i-QFP → QFN → BGA, ubuningi bezinyawo kanye nokuxhumeka kuyathuthuka kuyilapho ukuhlolwa kuba nzima. Leyo nselele yokuhlola yingakho amaphakheji ahlanganisiwe afihliwe edinga ikhono lokuqinisekisa elichazwe ngokulandelayo.

4. Indlela uhlobo lwephakheji ye-IC oluthinta ngayo ukuhlanganiswa kwe-PCB

Uhlobo lwephakheji ye-IC lunquma inqubo yokuhlanganisa kanye nendlela yokuhlola: amaphakheji ane-lead angabekwa futhi ahlolwe ngokubonakalayo ngqo, kuyilapho amaphakheji e-array afana ne-BGA ne-QFN edinga ukubekwa okuqondile, ukugeleza kabusha okulawulwayo, kanye nokuhlolwa kwe-X-ray ngoba amalunga awo afihliwe ngaphansi komzimba. Ngakho-ke ukupakisha kuyisinqumo sokukhiqiza, hhayi nje sikagesi - kusetha lokho umugqa kanye nokuhlolwa okumele kwenziwe:

• I-SMT Eholwa (QFP, SOIC) izindawo kalula futhi amalunga ayo ayabonakala ukuhlola okuzenzakalelayo kwe-optical, okwenza kube yinto ethethelela kakhulu ukuyakha.
• I-QFN idinga ukunamathiswa okucophelela kanye nejoyinti elihle le-thermal-pad, elinamajoyinti afihliwe kanye nawangaphansi avame ukudinga i-X-ray.
• BGA kudinga ukubekwa okunembile kanye nephrofayili yokugeleza kabusha elawulwayo ukuze amabhola awe kahle, futhi amalunga awo afihliwe ngokuphelele angaqinisekiswa kuphela yi- Ukuhlolwa kwe-X-ray — inhliziyo yokwethembeka Umhlangano we-BGA.
• Ngembobo isebenzisa i-wave noma i-selective soldering futhi kulula kakhulu ukuyi-solder ngesandla nokuyihlola.

Okubalulekile ukuthi ukukhetha iphakethe eliqinile kukubophezela enqubweni yokuhlanganisa enekhono nge-X-ray, ngakho-ke iphakethe kanye nohlelo lokukhiqiza kufanele kunqunywe ndawonye kunokuba iphakethe likhethwe lodwa.

5. Indlela yokukhetha iphakheji ye-IC efanele

Khetha iphakheji ye-IC ngokulinganisela isikhala sebhodi, izidingo zokushisa, ikhono lokuhlanganisa, kanye nezindleko ngokuhambisana nokutholakala kwengxenye — iphakheji encane kakhulu ayihlali ingcono kakhulu uma iphoqa ukwakhiwa okunzima nokubiza kakhulu kunezidingo zomkhiqizo wakho. Ngokuvamile i-chip efanayo inikezwa emaphaketheni amaningana, okwenza lokhu kube ukukhetha kwangempela komklamo. Izici okufanele uzicabangele:

• Indawo yebhodi. Imiklamo eqinile neqinile iqhubekela phambili ku-QFN kanye ne-BGA; amabhodi amakhulu angasebenzisa amaphakheji anomthofu okulula ukuwahlanganisa.
• Izidingo zokushisa. Amaphakheji anama-thermal pad noma imizimba emikhulu aqeda ukushisa kangcono, okuyinto ebalulekile ezingxenyeni ezifuna amandla.
• Amandla okuhlanganisa. Izingxenye ze-BGA kanye nezingxenye eziqondile zidinga umugqa wokugeleza kabusha nge-X-ray; uma lokho kutholakala, kulungile — uma kungenjalo, iphakethe elinophawu liphephile.
• Izindleko nokutholakala. Ukukhetha iphakheji kuthinta kokubili izindleko zezingxenye kanye nezindleko zokuhlanganisa, futhi ingxenye ingagcinwa kuphela emaphaketheni athile.

Indlela engcono kakhulu ukuqinisekisa ukuthi iphakheji ifanela kokubili umklamo kanye nenqubo yokukhiqiza ehlosiwe kusenesikhathi — okungcono kakhulu ekubuyekezweni kokukhiqiza — ukuze ungazibophezeli kuphakheji inqubo yakho yokuhlanganisa engeke yakhiwe noma yahlolwa ngokuthembekile.

6. Indlela i-Highleap ehlanganisa ngayo yonke inhlobo yephakheji ye-IC

I-Highleap ihlanganisa yonke inhlobo yephakheji ye-IC — edlula emgodini, efakwe i-lead, i-QFN, kanye ne-BGA — ngokubekwa, ukugeleza kabusha, kanye nokuhlolwa okudingekayo yilowo nalowo, kufaka phakathi i-X-ray yamajoyinti afihliwe. Amaphakheji ane-lead abekwa futhi ahlolwe ngokubona, izingxenye ze-fine-pitch kanye ne-QFN zithola ukunamathisela okulawulwayo namaphrofayili, kanti ama-BGA abekwa ngokunembile futhi ageleze kabusha kuphrofayili eyakha amajoyinti ebhola lomsindo, bese kuqinisekiswa yi-X-ray.

Ngenxa yokuthi ukukhetha iphakheji kudala ubunzima bokuhlanganisa, isibuyekezo sokukhiqiza ngaphambi kokwakha sihlola ukuthi izinyathelo, ama-thermal pad, kanye ne-pitch kuyakhiwa nokuthi ukuhlolwa okufanele kuhleliwe - ukubamba izingozi ezihlobene nephakheji ngaphambi kokugijima. I-Highleap iletha lokhu ngaphakathi kokuhlanganiswa kwe-turnkey , ihlanganisa ukutholakala, ukubekwa, ukushiswa, kanye nokuhlolwa kuzo zonke izinhlobo zephakheji, futhi isekela ibhodi elingenalutho ngokukhiqizwa kwe-PCB . Uma ucela ikhotheshini, bhala amaphakheji e-IC ebhodini - ikakhulukazi noma yiziphi izingxenye ze-BGA noma ze-fine-pitch - kanye ne-pitch encane kunazo zonke, ngakho inqubo efanele kanye nokuhlolwa kuyalinganiswa.

7. Imibuzo Evame Ukubuzwa Ngephakheji ye-IC

Uyini umehluko phakathi kwephakheji ye-IC ne-chip engaphakathi?

I-chip (die) iyi-semiconductor engenalutho eyenza umsebenzi; iphakheji iyindlu eyivikelayo, ivuthela ukuxhumana kwayo ne-pitch efakwa ebhodini, futhi isiza ukususa ukushisa. Iphakheji yiyo eyenza i-chip iphatheke futhi ikwazi ukushintshwa.

Yiliphi iphakethe le-IC okulula ukulihlanganisa ngesandla?

Amaphakheji angena emigodini efana ne-DIP alula kakhulu, alandelwe amaphakheji afakwe ngaphezulu kwe-lead njenge-SOIC ne-QFP lapho ama-lead awo afinyeleleka kalula. I-QFN ne-BGA, ezinokuxhumana ngaphansi komzimba, zinzima noma azinakwenzeka ngesandla futhi zidinga ukugeleza kabusha.

Kungani i-BGA idinga ukuhlolwa kwe-X-ray?

Ngenxa yokuthi amabhola e-solder e-BGA afihliwe ngokuphelele ngaphansi kwephakheji, ayikho ikhamera engawabona. I-X-ray ibona emzimbeni ukuqinisekisa amalunga ebhola futhi ibone izimbobo noma ama-shorts, okuwukuphela kwendlela engonakalisi yokuqinisekisa ukuhlanganiswa kwe-BGA.

Uyini umehluko phakathi kwe-QFN ne-thermal pad?

I-QFN uhlobo lwephakheji olunama-pads emaphethelweni ayo angezansi; i-thermal pad iyi-metal pad enkulu phakathi kwama-QFN amaningi (nezinye amaphakheji) aqhuba ukushisa ebhodini. I-thermal pad kumele ihlanganiswe kahle ukuze isuse ukushisa kanye namandla omshini.

Ingabe i-chip efanayo ingafika ngamaphakheji ahlukene?

Yebo — ama-IC amaningi anikezwa ngezinketho eziningana zamaphakheji, akuvumela ukuthi uhwebe isikhala sebhodi, ukusebenza kokushisa, ubunzima bokuhlanganisa, kanye nezindleko. Lokhu kwenza ukukhetha iphakheji kube yisinqumo sangempela sokuklama kunokuba kube yimpahla ezinzile ye-chip.

Ingabe ukukhetha iphakheji kuthinta izindleko ze-PCB?

Yebo — amaphakheji aminyene njenge-BGA angadinga izendlalelo eziningi zamabhodi ukuze aqondiswe, izici ezincane, kanye nokuhlolwa kwe-X-ray, konke okwengeza izindleko, kuyilapho amaphakheji ane-lead eshibhile ukuwahlanganisa. Ukukhetha iphakheji kuthinta kokubili izindleko zezingxenye kanye nokuhlanganiswa.