- Kuki dukeneye gukora akanama?
Nyuma yo gushushanya PCB, SMT igomba gushyirwaho kumurongo winteko kugirango uhuze ibice.Ukurikije ibisabwa byo gutunganya umurongo winteko, buri ruganda rutunganya SMT ruzagaragaza ubunini bukwiye bwibibaho.Kurugero, niba ingano ari nto cyane cyangwa nini cyane, imiterere yo gutunganya pcb kumurongo winteko ntishobora gukosorwa.
Noneho niba ingano ya PCB ubwayo ari nto kurenza ubunini bwagenwe nuruganda?Ibyo bivuze ko dukeneye guhuriza hamwe imbaho zumuzunguruko, imbaho nyinshi zumuzunguruko mugice kimwe. Byombi kubyihuta - byihuta byihuta hamwe no kugurisha imiraba birashobora kunoza imikorere neza.
2.Icyitegererezo
1) Ingano yerekana
A. Kugirango byoroherezwe gutunganywa, impande zose zubusa cyangwa inzira bigomba kuba R bikurikirana, mubisanzwe bizengurutse Φ diameter 5, isahani nto irashobora guhinduka.
B. PCB ifite ubunini bumwe butarenze 100mm × 70mm igomba guterana
2) Imiterere idasanzwe kuri PCB
PCB ifite imiterere idasanzwe kandi nta kibaho kibaho kigomba kongerwaho ibikoresho byabigenewe.Niba hari umwobo kuri PCB urenze cyangwa uhwanye na 5mm × 5mm, umwobo ugomba kuzuzwa mbere mugushushanya kugirango wirinde guhindagurika kwa mantineer na plaque mugihe cyo gusudira.Igice cyuzuye hamwe nigice cyambere PCB kigomba guhuzwa ningingo nyinshi kuruhande rumwe hanyuma kigakurwaho nyuma yo kugurisha umuraba.
Iyo ihuriro riri hagati yumurongo wibikoresho na PCB ari v-shusho ya v, intera iri hagati yuruhande rwinyuma rwibikoresho na v-shusho ya v ni mm2mm; Iyo ihuriro riri hagati yimikorere na PCB ari umwobo wa kashe, nta gikoresho; cyangwa umuzenguruko ugomba gutondekwa muri 2mm yumwobo wa kashe.
3.Inama
Icyerekezo cyumwanya kigomba gutegurwa muburyo bujyanye nicyerekezo cyuruhande rwikwirakwizwa, usibye aho ingano idashobora kuzuza ibisabwa byubunini bwavuzwe haruguru. Birasabwa muri rusange ko umubare wa “v-gukata” cyangwa Imirongo ya kashe iri munsi cyangwa ingana na 3 (usibye kubibaho birebire kandi binini).
Bya shusho idasanzwe, witondere guhuza hagati yubuyobozi-munsi, gerageza gukora ihuriro rya buri ntambwe yatandukanijwe kumurongo.
4.Inyandiko zimwe kumwanya wa PCB
Muri rusange, umusaruro wa PCB uzakora icyo bita Panelisation kugirango wongere umusaruro wumurongo wa SMT.Ni ibihe bisobanuro bikwiye kwitabwaho mu nteko ya PCB?Nyamuneka reba ibyo bikurikira:
1) Ikadiri yinyuma (clamping edge) yumwanya wa PCB igomba kuba ikozwe mumuzinga ufunze kugirango barebe ko akanama ka PCB katazahinduka mugihe gashizwe kumurongo.
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3) Ubugari bwubunini bwa Panel ≤260mm line SIEMENS umurongo） cyangwa ≤300mm line umurongo wa FUJI).Niba bikenewe gutanga byikora, ubugari x uburebure ≤125mm × 180mm kubunini bwikibaho.
4) Buri kibaho gito mumwanya wa PCB kigomba kuba gifite byibuze imyobo itatu yo gukoresha, diameter 3≤ umwobo ≤ 6mm, insinga cyangwa SMT ntabwo byemewe muri 1mm yumwobo wibikoresho.
5) Intera hagati hagati yubuyobozi buto igomba kugenzurwa hagati ya 75mm na 145mm.
6) Mugihe ushyizeho umwobo wibikoresho, birasanzwe gusiga ahantu ho gusudira hafunguye 1.5mm nini hafi yumwobo wibikoresho.
7) Ntihakagombye kubaho ibikoresho binini cyangwa ibikoresho bisohoka hafi yumwanya uhuza hagati yikadiri yinyuma yikibaho imbere, hamwe hagati yikibaho.Uretse ibyo, hagomba kuba umwanya urenze 0.5mm hagati yibigize nu nkingi yubuyobozi bwa PCB kugirango umenye neza imikorere isanzwe yo gukata.
8. isahani; Aperture na position byukuri bigomba kuba hejuru, urukuta rwumwobo rworoshye nta burr.
9) Ihame, QFP ifite intera iri munsi ya 0,65mm igomba gushyirwaho mumwanya wacyo wa diagonal.Ibimenyetso byerekana umwanya ukoreshwa kubutaka bwa PCB bwinteko bizakoreshwa muburyo bubiri, butondekanye cyane kubintu byerekana.
10) Ibice binini bigomba kugira imyanya ihagaze cyangwa umwobo uhagaze, nka I / O Imigaragarire, mikoro, interineti ya batiri, microswitch, jack ya terefone, moteri, nibindi.