Kuki ukeneye gupfukirana zahabu kuri PCB?

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OSP: igiciro gito, kugurisha neza, kubika ibintu nabi, igihe gito, ikoranabuhanga ryibidukikije, gusudira neza, byoroshye…

HASL: mubisanzwe ni abantu benshi HDI PCB Icyitegererezo (ibice 4 - 46), yakoreshejwe nitumanaho rinini, mudasobwa, ibikoresho byubuvuzi ninganda zo mu kirere hamwe nubushakashatsi.

Urutoki rwa zahabu: ni ihuriro hagati yibibanza na chip yibuka, ibimenyetso byose byoherezwa nurutoki rwa zahabu.

Urutoki rwa zahabu rutondekanya umubare wizahabu uhuza, rwitwa "urutoki rwa zahabu" kubera ubuso bwazo bwa zahabu hamwe nintoki zimeze nkurutoki. Urutoki rwa zahabu mubyukuri rukoresha inzira idasanzwe yo gutwikira umuringa wuzuyeho zahabu, irwanya cyane okiside kandi ikora cyane. Ariko igiciro cya zahabu gihenze, isahani yamabati ikoreshwa mugusimbuza ububiko bwinshi. Kuva mu kinyejana gishize 90 s, ibikoresho byamabati byatangiye gukwirakwira, ikibaho cyababyeyi, kwibuka, nibikoresho bya videwo nka "urutoki rwa zahabu" hafi ya byose bikoreshwa mubikoresho byamabati, gusa ibikoresho bimwe na bimwe bikora cyane seriveri / ibikoresho byakazi bizahuza aho kugirango bikomeze imyitozo yo gukoresha zahabu isize, igiciro rero gifite bike bihenze.

  1. Kuki ukoreshaikibaho?

Hamwe no guhuza IC hejuru kandi hejuru, IC ibirenge byinshi kandi byinshi. Mugihe uburyo bwo gutera amabati ahagaritse bigoye guhanagura icyuma cyiza cyo gusudira, kizana ingorane zo kwishyiriraho SMT; Mubyongeyeho, ubuzima bwo kubika isahani yo gutera amabati ni bugufi cyane. Nyamara, isahani ya zahabu ikemura ibyo bibazo:

1.0 Ingaruka ifatika, so, isahani yose ya zahabu isize mubucucike bukabije hamwe na tekinoroji ya ultra-nto yo kumeza ikora.

) ibyuma inshuro nyinshi, buriwese rero yiteguye kubyemera. Byongeye kandi, PCB isize zahabu muri dogere yikiguzi cyicyitegererezo ugereranije namasahani ya pewter

3.)

4.) Ariko hamwe ninsinga nyinshi kandi zuzuye, ubugari bwumurongo, intera igeze kuri 3-4MIL

Kubwibyo, bizana ikibazo cyumuzunguruko mugufi wa zahabu: hamwe nubwiyongere bwikimenyetso cyikimenyetso, ingaruka zo kohereza ibimenyetso mubitambaro byinshi kubera ingaruka zuruhu ziragenda zigaragara cyane

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  1. Kuki ukoreshakwibiza zahabu PCB?

Hariho ibintu bimwe na bimwe biranga kwibiza zahabu PCB yerekana nkuko bikurikira:

1.) imiterere ya kristu yakozwe na immersion zahabu na plaque ya zahabu iratandukanye, ibara rya zahabu yibiza bizaba byiza kuruta isahani ya zahabu kandi umukiriya aranyuzwe. Noneho guhangayikishwa nisahani ya zahabu yarengewe byoroshye kugenzura, bikaba byiza cyane gutunganya ibicuruzwa. Muri icyo gihe kandi kubera ko zahabu yoroshye kurusha zahabu, isahani ya zahabu rero ntambara - urutoki rwa zahabu rwihanganira.

2.) Immersion Zahabu yoroshye gusudira kuruta isahani ya zahabu, kandi ntabwo izatera gusudira nabi no kwinubira abakiriya.

3.) zahabu ya nikel iboneka gusa kuri paje yo gusudira kuri ENIG PCB, kwanduza ibimenyetso mubikorwa byuruhu biri murwego rwumuringa, bitazagira ingaruka kubimenyetso, ntanubwo biganisha kumurongo mugufi kuri zahabu. Soldermask kumuzunguruko ihujwe cyane nu muringa.

4.) Imiterere ya kristu ya zahabu yo kwibiza ni nyinshi kuruta isahani ya zahabu, biragoye kubyara okiside

5.) Nta ngaruka zizagira ku ntera igihe hatanzwe indishyi

6.) Uburinganire nubuzima bwa plaque ya zahabu nibyiza nkibya zahabu.

 

  1. Immersion Zahabu VS Isahani

 

Hariho ubwoko bubiri bwa tekinoroji yo gutunganya zahabu: imwe ni isahani ya zahabu yamashanyarazi, ubundi ni Zahabu ya Immersion

 

Kuburyo bwo gutunganya zahabu, ingaruka zamabati ziragabanuka cyane, kandi ingaruka za zahabu nibyiza; Keretse niba uwabikoze asaba guhuza, cyangwa ubu ababikora benshi bazahitamo inzira yo kurohama zahabu!

Mubisanzwe, kuvura hejuru ya PCB birashobora kugabanwa muburyo bukurikira: isahani ya zahabu (electroplating, immersion zahabu), isahani ya feza, OSP, HASL (hamwe na sisitemu), cyane cyane kubisahani bya FR4 cyangwa CEM-3, impapuro ibikoresho hamwe na rosin itwikiriye hejuru; Ku mabati akennye (kurya amabati) ibi niba gukuraho abakora paste nimpamvu zo gutunganya ibikoresho.

Hariho impamvu zimwe zikibazo cya PCB:

  1. Mugihe cyo gucapa PCB, niba hari amavuta yinjira muri firime kuri PAN, irashobora guhagarika ingaruka zamabati; ibi birashobora kugenzurwa nugurisha kureremba

  2. Niba imyanya myiza ya PAN ishobora kuba yujuje ibyangombwa bisabwa, ni ukuvuga, niba isuderi yo gusudira ishobora gushushanywa kugirango ibashe gushyigikirwa.

  3. Ikariso yo gusudira ntabwo yanduye, ishobora gupimwa no kwanduza ion; t

Kubijyanye n'ubuso:

Isahani ya zahabu, irashobora gutuma PCB ibikwa igihe kirekire, kandi nubushyuhe bwo hanze bwibidukikije hamwe nubushyuhe bwo guhinduka ni bito (ugereranije nubundi buryo bwo kuvura hejuru), mubisanzwe, birashobora kubikwa mugihe cyumwaka; HASL cyangwa kuyobora Ubuvuzi bwa HASL kubuntu bwa kabiri, OSP na none, uburyo bubiri bwo kuvura mubushuhe bwibidukikije nigihe cyo kubika ubushuhe kugirango witondere byinshi.

Mubihe bisanzwe, kuvura feza biratandukanye gato, igiciro nacyo kiri hejuru, uburyo bwo kubungabunga burakenewe cyane, gukenera gukoresha nta gutunganya impapuro za sulfuru! Kandi ubigumane hafi amezi atatu! Ku mabati, zahabu, OSP, tin spray mubyukuri birasa, abayikora bagomba gutekereza cyane kubikorwa byigiciro!