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Pali 3 zifukwa zazikulu PCBA kuyeretsa

1. Maonekedwe ndi zofunikira zamagetsi zamagetsi

The kwambiri mwachilengedwe zotsatira zoipitsa pa PCBA ndi maonekedwe a PCBA. Ngati atayikidwa kapena kugwiritsidwa ntchito pamalo otentha kwambiri komanso achinyezi, pakhoza kukhala kuyamwa kwa chinyezi ndi zotsalira zoyera. Chifukwa cha kufalikira kwa tchipisi zopanda lead, micro-BGA, phukusi la chip-level (CSP) ndi zigawo za 0201 mu zigawo, mtunda pakati pa zigawo ndi bolodi ukuchepa, kukula kwa bolodi kukucheperachepera, ndipo kachulukidwe ka msonkhano kuwonjezeka. Ndipotu, ngati halide yobisika pansi pa chigawocho kapena sichikhoza kutsukidwa nkomwe, kuyeretsa m'deralo kungayambitse zotsatira zoopsa chifukwa cha kumasulidwa kwa halide. Izi zingayambitsenso kukula kwa dendrite, zomwe zingayambitse maulendo afupikitsa. Kuyeretsa kosayenera kwa zonyansa za ion kumabweretsa mavuto ambiri: kutsika kwapansi, kutukuta, ndi zotsalira za conductive pamwamba zidzapanga kugawa kwa dendritic (dendrites) pamwamba pa bolodi la dera, zomwe zimapangitsa kuti pakhale dera lalifupi, monga momwe tawonetsera pachithunzichi.

Wopanga mgwirizano waku China

Zomwe zimawopseza kudalirika kwa zida zamagetsi zankhondo ndi ndevu za malata ndi zolumikizirana zitsulo. Vuto likupitirirabe. Ndevu ndi zolumikizirana zitsulo pamapeto pake zipangitsa kuti pakhale kuzungulira kwakanthawi. M'madera a chinyezi komanso magetsi, ngati pali kuipitsidwa kwa ion kwambiri pazigawo zake, kungayambitse mavuto. Mwachitsanzo, chifukwa cha kukula kwa ndevu za malata a electrolytic, dzimbiri za ma conductor, kapena kuchepetsa kukana kwa kutchinjiriza, mawaya pa bolodi yozungulira amatha kufupikitsa, monga momwe chithunzichi chikusonyezera.

Opanga aku China PCB

Kuyeretsa molakwika kwa zoipitsa zosakhala ndi ma ion kungayambitsenso zovuta zingapo. Zitha kupangitsa kuti chigobacho chisamamatire bwino, kusalumikizana bwino kwa pini ya cholumikizira, kusokoneza thupi, komanso kusamata bwino kwa zokutira zofananira ku magawo ndi mapulagi. Panthawi imodzimodziyo, zonyansa zopanda ma ionic zimathanso kuyika zonyansa za ionic mmenemo, ndipo zimatha kuyika ndi kunyamula zotsalira zina ndi zinthu zina zovulaza. Izi ndi nkhani zomwe sizinganyalanyazidwe.

2, Three anti-penti zokutira zofunika

 

Kuti ❖ kuyanika odalirika, ukhondo padziko PCBA ayenera kukwaniritsa zofunika IPC-A-610E-2010 mlingo 3 muyezo. Zotsalira za utomoni zomwe sizimatsukidwa musanaphike pamwamba zimatha kupangitsa kuti gawo loteteza liwonongeke, kapena kuti chitetezo ching'ambike; Zotsalira za activator zingayambitse kusamuka kwa electrochemical pansi pa zokutira, zomwe zimapangitsa kulephera kwa chitetezo cha kupasuka kwa zokutira. Kafukufuku wawonetsa kuti kuchuluka kwa zomangira zomangira kumatha kuwonjezeka ndi 50% poyeretsa.

3, No Kuyeretsa kumafunikanso kutsukidwa

Malinga ndi miyezo yamakono, mawu akuti "osayera" amatanthauza kuti zotsalira pa bolodi ndizotetezedwa ndi mankhwala, sizidzakhala ndi zotsatira pa bolodi, ndipo zikhoza kukhalabe pa bolodi. Njira zoyezera zapadera monga kuzindikira kwa dzimbiri, kukana kwa insulation ya pamwamba (SIR), electromigration, ndi zina zambiri zimagwiritsidwa ntchito pozindikira zomwe zili halogen/halide motero chitetezo cha zinthu zosayera pambuyo pa msonkhano. Komabe, ngakhale kusinthasintha kosayera kokhala ndi zolimba zotsika kumagwiritsidwa ntchito, padzakhalabe zotsalira zambiri kapena zochepa. Kwa mankhwala omwe ali ndi zofunikira zodalirika kwambiri, palibe zotsalira kapena zowonongeka zina zomwe zimaloledwa pa bolodi la dera. Kwa ntchito zankhondo, ngakhale zida zamagetsi zopanda ukhondo zimafunikira.


Nthawi yotumiza: Feb-26-2024