1. Mugihe utetse PCB nini nini, koresha gahunda ya horizontal. Birasabwa ko umubare ntarengwa wikibaho utagomba kurenza ibice 30. Ifuru igomba gukingurwa muminota 10 nyuma yo guteka kugirango ikure PCB hanyuma uyirambike neza kugirango ikonje. Nyuma yo guteka, igomba gukanda. Ibikoresho birwanya kugoreka. PCB nini nini ntabwo isabwa gutekwa guhagaritse, kuko byoroshye kugorama.
2. Mugihe utetse PCBs ntoya nini nini, urashobora gukoresha stacking. Umubare ntarengwa wumurongo urasabwa kutarenza ibice 40, cyangwa birashobora kuba bigororotse, kandi umubare ntugarukira. Ugomba gufungura ifuru ugakuramo PCB muminota 10 yo guteka. Emera gukonja, hanyuma ukande jig anti-bending nyuma yo guteka.
Icyitonderwa mugihe PCB itetse
1. Ubushyuhe bwo guteka ntibugomba kurenza Tg point ya PCB, kandi ibisabwa muri rusange ntibigomba kurenga 125 ° C. Mu minsi ya mbere, ingingo ya Tg ya PC irimo PCBs yari nkeya ugereranije, none Tg ya PCB idafite PCB iri hejuru ya 150 ° C.
2. PCB yatetse igomba gukoreshwa vuba bishoboka. Niba idakoreshejwe, igomba kuba vacuum ipakiye vuba bishoboka. Niba ihuye n'amahugurwa igihe kirekire, igomba kongera gutekwa.
3. Wibuke gushyiramo ibikoresho byo kumisha umuyaga mu ziko, bitabaye ibyo amavuta azaguma mu ziko kandi yongere ubushuhe bugereranije, bikaba atari byiza kuri PCB.
4. Urebye ubuziranenge, uko kugurisha PCB gushya gukoreshwa, ibyiza bizaba byiza. Nubwo PCB yarangiye ikoreshwa nyuma yo guteka, haracyari ingaruka nziza.
Ibyifuzo byo guteka PCB
1. Birasabwa gukoresha ubushyuhe bwa 105 ± 5 ℃ guteka PCB. Kuberako amazi abira ari 100 ℃, mugihe arenze aho yatetse, amazi azahinduka umwuka. Kuberako PCB idafite molekile nyinshi zamazi, ntisaba ubushyuhe bwinshi cyane kugirango yongere umuvuduko wumwuka.
Niba ubushyuhe buri hejuru cyane cyangwa igipimo cya gaze cyihuta cyane, bizoroha byoroshye guhumeka amazi kwaguka vuba, mubyukuri ntabwo aribyiza kubwiza. Cyane cyane kubibaho byinshi hamwe na PCB hamwe nu mwobo washyinguwe, 105 ° C iri hejuru y’amazi abira, kandi ubushyuhe ntibuzaba buri hejuru cyane. , Irashobora kwangiza no kugabanya ibyago bya okiside. Byongeye kandi, ubushobozi bwitanura ryubu bwo kugenzura ubushyuhe bwateye imbere cyane kuruta mbere.
2. Niba PCB ikeneye gutekwa biterwa nuburyo ibipfunyika byayo bitose, ni ukuvuga kureba niba ikarita ya HIC (Humidity Indicator Card) iri muri pack ya vacuum yerekanye ubuhehere. Niba gupakira ari byiza, HIC ntabwo yerekana ko ubushuhe mubyukuri Urashobora kujya kumurongo udatetse.
3. Birasabwa gukoresha "kugororoka" no gutekera umwanya mugihe PCB itetse, kuko ibyo bishobora kugera ku ngaruka nini ziterwa no guhumeka ikirere gishyushye, kandi nubushuhe bworoshye gutekwa muri PCB. Nyamara, kuri PCB nini nini, birashobora kuba ngombwa gusuzuma niba ubwoko bwa vertical buzatera kunama no guhindura imikorere.
4. PCB imaze gutekwa, birasabwa kuyishyira ahantu humye kandi ikemerera gukonja vuba. Nibyiza gukanda "anti-bending fixture" hejuru yikibaho, kubera ko ikintu rusange cyoroshye gukuramo imyuka yamazi kuva mubushyuhe bwinshi kugeza inzira yo gukonja. Ariko, gukonjesha byihuse bishobora gutera isahani, bisaba kuringaniza.
Ibibi byo guteka PCB nibintu ugomba gusuzuma
1. Guteka bizihutisha okiside yubuso bwa PCB hejuru, kandi nubushyuhe bwinshi, niko guteka birebire, nibibi.
2. Ntabwo byemewe guteka imbaho zivuwe na OSP hejuru yubushyuhe bwinshi, kuko firime ya OSP izangirika cyangwa inanirwa kubera ubushyuhe bwinshi. Niba ugomba guteka, birasabwa guteka ku bushyuhe bwa 105 ± 5 ° C, bitarenze amasaha 2, kandi birasabwa kubikoresha mu masaha 24 nyuma yo guteka.
3. Guteka birashobora kugira ingaruka kumiterere ya IMC, cyane cyane kuri HASL (tin spray), ImSn (tin chimique, tin plaque immersion) imbaho zo kuvura hejuru, kubera ko igipimo cya IMC (umuringa w'amabati) mubyukuri hakiri kare PCB icyiciro Igisekuru, ni ukuvuga, cyakozwe mbere yo kugurisha PCB, ariko guteka bizongera umubyimba wuru rwego rwa IMC rwakozwe, bitera ibibazo byokwizerwa.