Kodi Ubwino wa SMT Processing Technology Ndi Chiyani?

Kukonzekera kwa SMT:

Choyamba padziko kusindikizidwa dera bolodi solder ❖ kuyanika solder phala, kachiwiri ndimakina a SMTzigawo za metallized terminal kapena pini molondola pa bonding pad wa solder phala, ndiye kuyika PCB ndi zigawo zikuluzikulu mureflow uvunilonse mkangano kusungunuka solder phala, pambuyo kuzirala, solder phala, solder kuchiritsa anazindikira pakati pa zigawo zikuluzikulu ndi kusindikizidwa dera kugwirizana makina ndi magetsi.Ubwino waukadaulo wa SMT processing ndi chiyani?

I. Kudalirika kwakukulu komanso kukana kugwedezeka kwamphamvu

SMT processing AMAGWIRITSA NTCHITO zigawo za chip, kudalirika kwakukulu, kachipangizo kakang'ono ndi kopepuka, kotero kukana kugwedezeka kumakhala kolimba, pogwiritsa ntchito makina opanga makina, odalirika kwambiri, nthawi zambiri osauka olowa nawo olowa nawo amakhala osakwana 10,000, otsika kuposa mafunde a plugging. soldering luso dongosolo la ukulu, kuonetsetsa kuti zinthu zamagetsi kapena zigawo solder olowa chilema ndi otsika, Pakali pano, pafupifupi 90% ya mankhwala amagetsi kutengera SMT luso.

II.Zamagetsi ndi zazing'ono kukula ndi mkulu mu kachulukidwe msonkhano

Voliyumu ndi kulemera kwa zigawo za SMT ndi pafupifupi 1/10 chabe ya zigawo zachikhalidwe zamapulagi.Nthawi zambiri, ukadaulo wa SMT ungachepetse kuchuluka ndi kulemera kwa zinthu zamagetsi ndi 40% -60% ndi 60% -80%, motsatana.The SMT SMT processing ndi zigawo zikuluzikulu gululi kuchokera 1.27mm mpaka pano 0.63mm gridi, ena mpaka 0.5mm gridi, kudzera m'dzenje unsembe luso kukhazikitsa zigawo zikuluzikulu, kungachititse msonkhano kachulukidwe apamwamba.

III.Makhalidwe apamwamba pafupipafupi, magwiridwe antchito odalirika

Chifukwa chomangika cholimba cha zigawo za chip, chipangizocho nthawi zambiri chimakhala chopanda lead kapena chachifupi, chomwe chimachepetsa mphamvu ya parasitic inductance ndi parasitic capacitance, chimapangitsa mawonekedwe apamwamba kwambiri a dera, ndikuchepetsa kusokoneza kwa electromagnetic ndi rf.Mabwalo opangidwa ndi SMC ndi SMD amakhala ndi ma frequency apamwamba a 3GHz, pomwe zida za chip ndi 500MHz zokha, zomwe zitha kufupikitsa nthawi yochedwa kufalitsa.Itha kugwiritsidwa ntchito m'mabwalo okhala ndi mawotchi pafupipafupi kuposa 16MHz.Ndiukadaulo wa MCM, mawotchi apamwamba kwambiri pamakompyuta amatha kufika 100MHz, ndipo kugwiritsa ntchito mphamvu zowonjezera chifukwa chakuchita kwa parasitic kumatha kuchepetsedwa ndi nthawi 2-3.

IV.Limbikitsani zokolola ndikuzindikira kupanga zokha

Kuti zonse zokha, perforated PCB kukwera panopa kumafuna 40% kuwonjezeka m'dera la PCB choyambirira kuti msonkhano mutu wa basi pulagi-mu akhoza amaika chigawo chimodzi, apo ayi palibe malo okwanira kuswa mbali.Makina odziyimira pawokha a SMT (SM421/SM411) amagwiritsa ntchito choyamwa cha vacuum nozzle ndikutulutsa, pompopompo ndi yaying'ono kuposa mawonekedwe agawo, koma sinthani kachulukidwe kake.M'malo mwake, tizigawo ting'onoting'ono komanso malo abwino a QFP amapangidwa ndi makina a SMT kuti akwaniritse kupanga kwathunthu.

V. Kuchepetsa ndalama ndi ndalama

1. Malo ogwiritsira ntchito bolodi losindikizidwa amachepetsedwa, ndipo malowa ndi 1/12 a teknoloji yodutsa-bowo.Ngati kukhazikitsidwa kwa CSP kuvomerezedwa, malowo adzachepetsedwa kwambiri.

2. Chiwerengero cha mabowo obowola pa bolodi losindikizidwa amachepetsedwa kuti apulumutse ndalama zokonza.

3. Chifukwa cha kusintha kwa machitidwe afupipafupi, mtengo wa kusokoneza dera umachepetsedwa.

4. Chifukwa cha kukula kwazing'ono ndi kulemera kwake kwa zigawo za chip, kulongedza, zoyendetsa ndi kusungirako ndalama zimachepetsedwa.

5. Ukadaulo waukadaulo wa SMT SMT ungapulumutse zida, mphamvu, zida, ogwira ntchito, nthawi, ndi zina, zitha kuchepetsa ndalama mpaka 30% -50%.