Ua kom zoo rau PCBA tsim yog qhov tseem ceeb rau kev tswj hwm cov nqi ntau lawm, cuam tshuam ncaj qha cuam tshuam cov khoom sib tw thiab cov paj tau txais txiaj ntsig. Los ntawm kev siv cov tswv yim scientific, cov tuam txhab tuaj yeem txo cov khoom siv, kev tsim khoom, thiab kuaj cov nuj nqis thaum tswj kev ua tau zoo.
1. Cov qauv xaiv xaiv thiab muab cov saw txuas sib koom tes
Ua ntej cov pob khoom uas nquag siv cov pob khoom: siv cov qauv lag luam thiab capacitor cov pob (piv txwv li, 0805, 0603 kom txo qis kev cai kev cai. Cov Qauv Txheej Txheem Muaj cov sij hawm ua luv luv, cov nqi qis dua, thiab cov kab ke rov siv dua. Piv txwv li, ib lub tuam txhab txo cov nqi ua tiav cov nqi los ntawm 18% dhau los ntawm kev ntim khoom sib koom ua ke.
Lwm qhov kev npaj ua kom haum: qhia meej {2-3}}}}}} egus, nco) hauv bom rau txo cov kev pheej hmoo. Siv cov databases zoo li octopart rau kev sib tw ntawm lub sijhawm tiag tiag thiab cov chaw xa khoom.
Kev yuav khoom thiab cov lus cog lus ntev: Kos npe rau cov ntawv cog lus txhua xyoo (piv txwv li, cov nqi sib txuas) kom muaj nuj nqis rau cov nqi thiab ntim cov nqi.
2. Txheej txo thiab cov khoom siv tus nqi tswj
Optimize PCB Layers: Use 4-layer boards instead of 6- or 8-layer designs where signal integrity permits. Cov cuab yeej sib txuas lus cov khoom siv raug hluav taws xob txo rau ib lub rooj tsav tsheb los ntawm 25% los ntawm kev ua haujlwm ntawm kev ua kom zoo.
Xaiv Kev Xaiv Ntxiv: Xaiv cov nqi siv tau zoo tshaj plaws Fr {1}} qib rau cov ntawv thov. Rau cov kev tsim muaj zog tshaj plaws, hybrid stacks (piv txwv li, ro4350b nrog fr {}) tuaj yeem txuag 30% piv rau tag nrho cov nquag substrates.
Kev tsim qauv vaj huam sib luag tsim: Maximize vaj huam sib luag siv (saum 90%) ntawm v-txiav los yog breakaway tablets, layizing cov khoom pov tseg.
3. Tsim rau Kev Raug Raug (DFM) thiab cov txheej txheem yooj yim
Zam kev sib tw zoo nkauj (QFNs Cov neeg siv khoom siv hluav taws xob tau nce tawm los ntawm 12% tom qab hloov ntawm {4}}. 5 hli bga pitches.
Pad thiab stencil optimization: siv cov ntaub qhwv duab rau kev sib dhos kom zoo dua thiab tswj hwm}. 15mm) kom txo voids thiab bridging.
Yooj yim saum npoo: hloov tus nqi rau cov roj (electroless npib kub) nrog HASS lossis ORS POB ZEB, txiav ib-board nqi los ntawm 8% {{%.
4. Kuaj cov tswv yim thiab kev tiv thaiv tsis taus
Ciam yuam kev scan (JTAG) Kev sib koom ua ke: siv JTag Chains rau ntau qhov kev sim ntau, txo cov ntsiab lus xeem los ntawm ntau dua 50% thiab fixture nyuaj.
DFT (tsim qauv rau kev ua kom muaj) Cov cai: Cov cim kev nqis peev rau cov cim tseem ceeb (piv txwv li cov hwj chim siv hluav taws xob) los ua kom yooj yim txog cov kev sojntsuam.
Thaum Ntxov qauv siv tau: Siv 3D luam tawm lossis ceev pcb prototyping los txheeb xyuas cov qauv muaj kev tsim khoom pre-production pre-ntau lawm, zam kev ua haujlwm kim.
