Aliyense amene ali mugulu losindikizidwa ( PCB ) makampani amamvetsetsa kuti ma PCB ali ndi zomaliza zamkuwa pamtunda wawo.Ngati atasiyidwa osatetezedwa ndiye kuti mkuwawo umatulutsa okosijeni ndikuwonongeka, zomwe zimapangitsa kuti bolodi ladera lisagwiritsidwe ntchito.Kumapeto kwapamwamba kumapanga mawonekedwe ovuta pakati pa chigawocho ndi PCB.Mapetowo ali ndi ntchito ziwiri zofunika, kuteteza zozungulira zamkuwa zomwe zimawonekera komanso kupereka malo ogulitsidwa pamene akusonkhanitsa (kugulitsa) zigawozo ku bolodi losindikizidwa.

HASL / Lead Free HASL

HASL ndiye mapeto apamwamba omwe amagwiritsidwa ntchito pamakampani.Njirayi imakhala ndi kumiza matabwa ozungulira mumphika wosungunuka wa malata / lead alloy ndiyeno kuchotsa solder yowonjezereka pogwiritsa ntchito 'mipeni ya mpweya', yomwe imawomba mpweya wotentha pamwamba pa bolodi.

Chimodzi mwazabwino zosayembekezereka za njira ya HASL ndikuti idzawonetsa PCB ku kutentha mpaka 265 ° C yomwe idzazindikiritse zovuta zilizonse zomwe zingachitike bwino zisanachitike zida zilizonse zodula ku bolodi.

HASL Yamaliza Bolodi Yamagawo Awiri Osindikizidwa

Ubwino:

• Mtengo wotsika
• Likupezeka Ponseponse
• Zothekanso
• Wabwino Shelf Life

Zoyipa:

• Maonekedwe Osafanana
• Sibwino kwa Fine Pitch
• Muli Mtsogoleri (HASL)
• Thermal Shock
• Solder Bridge
• Ma PTH Okulungidwa kapena Ochepetsedwa (Opangidwa Kupyolera M'mabowo)

Kumiza Tin

Malinga ndi IPC, Association Connecting Electronics Industry, Immersion Tin (ISn) ndi chitsulo chomaliza chomwe chimayikidwa ndi chemical displacement reaction chomwe chimayikidwa mwachindunji pazitsulo zazitsulo za board board, ndiko kuti, mkuwa.The ISn imateteza mkuwa wapansi ku okosijeni pa moyo wake wa alumali.

Mkuwa ndi malata komabe zili ndi mgwirizano wamphamvu pakati pawo.Kufalikira kwa chitsulo chimodzi mumzake kudzachitika mosalephera, kukhudza mwachindunji moyo wa alumali wa depositi ndi ntchito yomaliza.Zotsatira zoyipa za kukula kwa ndevu za malata zimafotokozedwa bwino m'mabuku okhudzana ndi mafakitale ndi mitu yamapepala angapo osindikizidwa.

Ubwino:

• Pamwamba Pamwamba
• Pa pb
• Zothekanso
• Kusankha Kwapamwamba kwa Press Fit Pin Insertion

Zoyipa:

• Zosavuta Kuyambitsa Kusamalira Zowonongeka
• Njira Imagwiritsa Ntchito Carcinogen (Thiourea)
• Tin Yowonekera pa Final Assembly ikhoza Kuwononga
• Tin Whiskers
• Si Zabwino Pamachitidwe Awiri Obwereza/Kusonkhana
• Zovuta kuyeza makulidwe

Kumiza Siliva

Siliva womiza ndi kumaliza kwa mankhwala osagwiritsa ntchito electrolytic pomiza PCB yamkuwa mu thanki ya ayoni asiliva.Ndiwomaliza kusankha bwino pama board ozungulira omwe ali ndi EMI shieldingand amagwiritsidwanso ntchito polumikizana ndi dome ndi kulumikizana ndi mawaya.Makulidwe apakati a siliva ndi ma 5-18 mainchesi.

Ndi zovuta zamasiku ano zachilengedwe monga RoHS ndi WEE, siliva womiza ndi wabwinoko kuposa HASL ndi ENIG.Ndiwotchuka chifukwa cha mtengo wake wotsika kuposa ENIG.

Ubwino:

• Imagwira mofanana kwambiri kuposa HASL
• Zachilengedwe bwino kuposa ENIG ndi HASL
• Alumali moyo wofanana HASL
• Zotsika mtengo kuposa ENIG

Zoyipa:

• Ayenera kugulitsidwa mkati mwa tsiku lomwe PCB imachotsedwa kusungirako
• Ikhoza kuipitsidwa mosavuta ndi kusagwira bwino
• Zocheperako kuposa ENIG chifukwa chopanda nickel pansi

OSP / Entek

OSP (Organic Solderability Preservative) kapena anti-tarnish imateteza pamwamba pa mkuwa kuti zisakokedwe ndi okosijeni popaka zosanjikiza zoonda kwambiri zoteteza pa mkuwa wowonekera nthawi zambiri pogwiritsa ntchito njira yotumizira.

Amagwiritsa ntchito madzi opangidwa ndi madzi omwe amamangiriza mkuwa ndipo amapereka gawo la organometallic lomwe limateteza mkuwa usanayambe kugulitsidwa.Ndilonso lobiriwira kwambiri mwachilengedwe poyerekeza ndi zida zina zomwe sizikhala ndi lead, zomwe zimakhala ndi poizoni kapena kugwiritsa ntchito mphamvu kwambiri.

Ubwino:

• Pamwamba Pamwamba
• Pa pb
• Njira Yosavuta
• Zothekanso
• Mtengo Wogwira

Zoyipa:

• Palibe Njira Yoyezera Makulidwe
• Si Yabwino kwa PTH (Yokutidwa ndi Mabowo)
• Short Shelf Life
• Ikhoza Kuyambitsa Mavuto a ICT
• Adawululidwa Cu pa Final Assembly
• Kugwira Mwachangu

Electroless Nickel Immersion Gold (ENIG)

ENIG ndi zokutira ziwiri zosanjikiza zitsulo za 2-8 μin Au kupitirira 120-240 μin Ni.Nickel ndiye chotchinga mkuwa ndipo ndi pamwamba pomwe zidazo zimagulitsidwako.Golide amateteza faifi tambala panthawi yosungidwa komanso imaperekanso kukana kutsika komwe kumafunikira kuti golide wochepa kwambiri asungidwe.ENIG tsopano ndiyomwe imagwiritsidwa ntchito kwambiri pamakampani a PCB chifukwa chakukula ndi kukhazikitsidwa kwa malamulo a RoHs.

Printed Circuit Board yokhala ndi Chem Gold Surface Finish

Ubwino:

• Pamwamba Pamwamba
• Pa pb
• Zabwino kwa PTH (Yokutidwa ndi Mabowo)
• Long Shelf Life

Zoyipa:

• Zokwera mtengo
• Osathekanso kugwira ntchito
• Black Pad / Black Nickel
• Zowonongeka kuchokera ku ET
• Kutayika kwa Signal (RF)
• Njira Yovuta

Nickel Wopanda Electroless Palladium Immersion Gold (ENEPIG)

ENEPIG, wachibale watsopano kudziko lomaliza, adabwera pamsika chakumapeto kwa zaka za m'ma 90.Chophimba chachitsulo cha nickel, palladium, ndi golidi chamitundu itatu chimapereka mwayi wosankha wina aliyense: ndichotheka.Mng'alu woyamba wa ENEPIG pamankhwala osindikizidwa osindikizidwa adasokonekera chifukwa cha mtengo wake wokwera kwambiri wa palladium komanso kufunikira kochepa kogwiritsa ntchito.

Kufunika kwa mzere wopangira wosiyana sikunalandire zifukwa zomwezi.Posachedwapa, ENEPIG yabwereranso monga kuthekera kokwaniritsa kudalirika, zosowa zamapaketi, ndi miyezo ya RoHS ndizowonjezera pakumaliza uku.Ndi yabwino kwa mafupipafupi ogwiritsira ntchito pomwe malo amakhala ochepa.

Poyerekeza ndi zomaliza zina zinayi zapamwamba, ENIG, Lead Free-HASL, siliva womiza ndi OSP, ENEPIG imaposa zonse pamlingo wa dzimbiri pambuyo pa msonkhano.

Ubwino:

• Pamwamba Pamwamba Kwambiri
• Palibe Zotsogolera
• Multi-Cycle Assembly
• Zophatikiza Zabwino Kwambiri za Solder
• Waya Bondable
• Palibe Zowopsa Zowononga
• Miyezi 12 Kapena Kukulirapo Kwa Shelufu
• Palibe Chiwopsezo cha Black Pad

Zoyipa:

• Ndiwokwera mtengo
• Imagwiranso Ntchito Ndi Zolepheretsa Zina
• Malire Okonzekera

Golide - Golide Wolimba

Gold Electrolytic Gold imakhala ndi golide wosanjikiza wokutidwa ndi chotchinga cha faifi tambala.Golide wolimba ndi wokhazikika kwambiri, ndipo nthawi zambiri amagwiritsidwa ntchito kumalo ovala kwambiri monga zala zolumikizira m'mphepete ndi makiyi.

Mosiyana ndi ENIG, makulidwe ake amatha kusiyanasiyana poyang'anira nthawi ya plating, ngakhale kuti zocheperako zala zala ndi 30 μin golide kupitilira 100 μin nickel wa Class 1 ndi Class 2, 50 μmu golide wopitilira 100 μin nickel wa Gulu 3.

Golide wolimba nthawi zambiri sagwiritsidwa ntchito kumadera omwe angagulitsidwe, chifukwa cha kukwera mtengo kwake komanso kusasunthika kwake.Makulidwe apamwamba kwambiri omwe IPC amawona kuti akhoza kugulitsidwa ndi 17.8 μin, kotero ngati golide wamtunduwu akuyenera kugwiritsidwa ntchito pamalo oti agulitsidwe, makulidwe ovomerezeka akuyenera kukhala pafupifupi 5-10 μin.

Ubwino:

• Malo Olimba, Olimba
• Pa pb
• Long Shelf Life

Zoyipa:

• Zokwera mtengo kwambiri
• Zowonjezera Zowonjezera / Zogwira Ntchito
• Kugwiritsa Ntchito Resist / Tepi
• Plating / Bus Bars zofunika
• Kudula malire
• Kuvuta ndi Zomaliza Zina Zapamwamba
• Etching Undercut Itha Kutsogolera ku Sliver / Flaking
• Osagulitsidwa Pamwamba pa 17 μin
• Malizitsani Samangirira Mmbali Zammbali Mokwanira, Kupatula M'magawo a Zala

Mukuyang'ana Malo Apadera Omaliza a Gulu Lanu Lozungulira?