Ubuvuzi bwa PCB nurufunguzo nurufatiro rwubwiza bwa SMT.Inzira yo kuvura iyi link ikubiyemo ingingo zikurikira.Uyu munsi, nzabagezaho uburambe mubuyobozi bwumuzunguruko wabigize umwuga hamwe nawe:
(1) Usibye ENG, ubunini bwurwego rwa plaque ntibusobanuwe neza mubipimo byigihugu bijyanye na PC.Birasabwa gusa kuzuza ibisabwa byo kugurisha.Ibisabwa rusange mu nganda nibi bikurikira.
OSP: 0.15 ~ 0.5 μ m, ntibisobanuwe na IPC.Basabwe gukoresha 0.3 ~ 0.4um
EING: Ni-3 ～ 5um;Au-0.05 ～ 0.20um (PC iteganya gusa ibisabwa byoroheje)
Im-Ag: 0.05 ~ 0,20um, umubyimba, niko gukomera cyane (PC idasobanuwe)
Im-Sn: ≥0.08um.Impamvu yibyibushye nuko Sn na Cu bazakomeza gutera imbere muri CuSn mubushyuhe bwicyumba, bigira ingaruka kubishobora.
HASL Sn63Pb37 ikorwa muburyo busanzwe hagati ya 1 na 25um.Biragoye kugenzura neza inzira.Isonga-yubusa ikoresha cyane cyane SnCu.Bitewe nubushyuhe bwo hejuru butunganijwe, biroroshye gukora Cu3Sn hamwe nijwi ridasobanutse neza, kandi irakoreshwa muri iki gihe.
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Inshuro 0: im-sn (2) florida gusaza (1.2), osp (1.2) im-ag (3).
INGINGO ZA ZWITERO Zweiter ZWITERO ZIKURIKIRA Im-Sn ifite kurwanya ruswa nziza, ariko abayigurisha barwanya ubukene!
Inshuro 4: ENG (3) -ImAg (4.3) -OSP (10) -ImSn (10).
(3) Ubushuhe kuri SAC305 (nyuma yo kunyura mu itanura kabiri).
ENG (5.1) —Im-Ag (4.5) —Im-Sn (1.5) —OSP (0.3).
Mubyukuri, abikinisha barashobora kwitiranya cyane nibi bipimo byumwuga, ariko bigomba kumenyekana nabakora PCB yerekana no gutema.
Igihe cyo kohereza: Gicurasi-28-2021
