Ukuhamba ngobungqingqwa bobhedu bendawo buncinci kakhulu kwaye buvuleke kakhulu PCB Icandelo lokuvelisa lijongane kunye, enye yemicimbi ephambili yezobuchwephesha kwixa elidlulileyo ingxoxo evulekileyo evulekileyo kwaye amanqaku ophando ancitshisiwe kwinkqubo yebhodi yePCB yokukhetha iplanga, iphepha le-CTE yokwanda komlingani wobushushu mkhulu, kamva kwindibano ukothuka kubanda kwaye kushushu kubangele ukuhlalutya kwemingxuma yokuhlahlela ityala, njengokuqhubekeka ngobhedu ngaphandle kwe-PCB uqobo, I-Hole electroplating yokuhlaziya nokusombulula iingxaki. Eli phepha lihlalutya unobangela wobhedu obhityileyo emngxunyeni ukusuka kwicala le-electroplating ye-PCB, kwaye isixelela indlela yokuphepha ukusilela kwe-PCB okubangelwa sisiphaluka esivulekileyo ngenxa yobhedu obhityileyo emngxunyeni ukusuka kwicala lokukhetha.

Ukuthetha ngokubanzi, ubuninzi bomngxunya wobhedu kwibhodi yesekethe yebhodi iyafuneka phakathi kwe-0.8-1mil. Ngokubhekisele kwiibhodi zesekethe ezixineneyo, ezinje nge-HDI, kuba umngxunya ongaboniyo akukho lula ukuyikhetha kunye nokwenza ucingo olucekeceke, iimfuno zomngxunya wobhedu wobhedu ziya kuncitshiswa ngokuphakathi, kungoko ke kukho ubuncinci bomngxunya wobhedu ogqityiweyo of 0.4mil okanye iinkcukacha ngakumbi. Nangona kunjalo, kukho iimeko ezithile ezizodwa, ezinje ngeebhodi ezinkulu zesekethe zeenkqubo ezifuna umngxunya we-0.8mil okanye ngaphezulu ngenxa yendibano ekhethekileyo kunye neemfuno zokuthembeka zexesha elide lokusetyenziswa. Kwi-IPC-6012, kukho inqanaba elicacileyo lobukhulu bobhedu ebusweni bomngxunya, ke loluphi uhlobo lwembobo yobhedu emiselweyo efunekayo, ngokweemfuno zemveliso, ekugqibeleni ichazwe ngumthengi.

Umngxuma wePCB umngxuma wobhedu ogqityiweyo kunye nokugqitywa kobunzima bobhedu

Oku kulandelayo yitshathi yokuhamba ngokubanzi kwePCB yesiqhelo:

Umngxuma wePCB umngxuma wobhedu ogqityiweyo kunye nokugqitywa kobunzima bobhedu

Umngxuma wePCB umngxuma wobhedu ogqityiweyo kunye nokugqitywa kobunzima bobhedu

Sinokubona ngokucacileyo kula manani mabini, i-PCB yethu yokugqiba ubukhulu bobhedu yi-PCB isiseko sobhedu kunye nobunzima bombane kunye nombane, ekugqibeleni, oko kugqityiwe ubukhulu bobhedu bukhulu kune-PCB yesiseko sobhedu, kwaye sonke siyi-PCB umngxuma ubukhulu bezobhedu, zigqityiwe kwiinkqubo ezimbini ze-electroplating, oko kukuthi, ubukhulu bayo yonke ipleyiti umngxunya wokugoba ubhedu obunokuthambisa ubhedu kunye nemizobo.

Ubunzima bobhedu obugqityiweyo be-PCB benziwe ngesiseko sobhedu lobunzima be-PCB kunye nobukhulu bokugqibela bombane wombane kunye nombane wegrafu, oko kukuthi, ukugqitywa kobhedu okugqityiweyo kukhulu kunesiseko sobhedu lwe-PCB. Ubungqingqwa bobhedu bayo yonke imingxunya ye-PCB yethu igqityiwe ngokwenza i-electroplating kwiinkqubo ezimbini, oko kukuthi, ubukhulu bezobhedu bemingxunya evaliweyo yebhodi yonke kunye nobukhulu bobhedu bemizobo ebunjiweyo.

Iimveliso ezigqityiweyo eziqhelekileyo ezigqityiweyo ze-1OZ zobhedu, umngxuma wobhedu ngokwenqanaba le-2 le-IPC, ihlala ibubhedu (ipleyiti epheleleyo) ubukhulu be-5-7um, ubhedu ezimbini (ukuzoba ngokuzoba) ubukhulu be-13-15um, ke umngxuma wobhedu phakathi kwe-18 -22um, kunye nokudibanisa kunye nezinye izizathu ezibangelwa yilahleko, umgodi wokugqibela ubhedu malunga ne-20UM.

Iimfuno eziqhelekileyo zobunzima bobhedu emngxunyeni (IPC-6012B, GJB 362A-96, QJ3103-99)

Umngxuma wePCB umngxuma wobhedu ogqityiweyo kunye nokugqitywa kobunzima bobhedu

Ngokusebenzisa umngxuma electroplating ikhonkco ebaluleke kakhulu kwinkqubo yokuvelisa PCB. Ukuze uqonde ukunxibelelana kombane kumanqanaba ahlukeneyo esinyithi esiqhubayo, ubhedu olunokuqhutywa kombane olungileyo kufuneka lubotshwe eludongeni lomngxunya womngxunya. Ngokhuphiswano olwandayo olunobukrakra lweemveliso zesiphelo, kuyanyanzeleka ukuba kubekwe phambili iimfuno eziphezulu ekuthembekeni kweemveliso zePCB, kwaye ubukhulu be-hole-electroplating layer ibe yenye yezinto zokulinganisa ukuthembeka kwePCB. Into ebalulekileyo echaphazela ukutyeba kobhedu kumngxunya wePCB kukunxibelelana okunzulu kwesingxobo sePCB.

Isalathiso esibalulekileyo sokuvavanya umphumo we-PCB ukutyhoboza emngxunyeni kukufana kobungqingqwa bokutyabeka ubhedu emngxunyeni. Kwishishini le-PCB, ubunzulu besingxobo sokuchazwa sichazwa njengomlinganiso wobunzima bokutyabeka ubhedu embindini womngxunya ukuya kubungqingqwa bokutyabeka ubhedu emlonyeni womngxunya.

Ukuze uchaze ngcono ukubanakho kwesingxobo esinzulu, ubukhulu besithuba sokuvula, oko kukuthi, ubukhulu be-diameter of ratio, sihlala sisetyenziswa.

Ibhodi yePCB ayityebanga kakhulu kodwa ukuvula kukhulu, ukusasazwa kombane kwinkqubo yokufakelwa kombane kuyalingana, ukusasazeka kwe-ion emngxunyeni kulungile, isisombululo se-electroplating isisombululo esinexabiso elininzi sihlala sikhulu; Ngokuchasene noko, xa umlinganiso wobukhulu kububanzi ukuya kububanzi buphezulu, udonga lomngxunya luyakubonisa ukwenzeka “kwethambo lenja”, (ubume bethusi elingqindilili emlonyeni nobhedu olucekeceke embindini womngxunya), isangqa esinzulu Umthamo webhafu uhlwempuzekile.

Ubunzulu beplati yokulinganisa bunezinto zilandelayo:

1. Ukuphucula ukuthembeka

Ukufana kobungqingqwa besingxobo sobhedu esonyuliweyo eludongeni lomngxuma kuphuculwe, okubonelela ngesiqinisekiso esingcono sokubanda nokubanda kwePBB kumphakamo olandelayo kunye nokusetyenziswa kweemveliso zesiphelo sendlela, ukuthintela ukusilela kwinqanaba lokuqala, yongeza ubomi benkonzo kunye nokuphucula ukuthembeka okuphezulu kweemveliso.

2. Ukuphucula imveliso

Inkqubo yokwenza i-Electroplating ngokubanzi yinkqubo ye “bottleneck” kwinkqubo yokuvelisa, ukuphuculwa kobunzulu beplating kunganciphisa ixesha lesingxobo, kuphucule imveliso kunye nokusebenza kakuhle.

3. Ukunciphisa iindleko zokuvelisa

Iifektri ze-PCB ngokubanzi zikholelwa ukuba ukuba ubunzulu besingxobo sokuntywila bonyuswe nge-10%, iindleko ezibonakalayo zinokuncitshiswa nge-10% ubuncinci. Isibonelelo esithe ngqo sale nto inye sisigidi se-yuan / ngonyaka, singasathethi ngothotho lwezibonelelo ezingathanga ngqo emva kokuphucula umgangatho wemveliso.