Txhim kho koj cov PCB fabrication: xaiv qhov zoo meej tiav rau koj 12-txheej board

Hauv blog no, peb yuav tham txog qee qhov kev kho mob nto moo thiab lawv cov txiaj ntsig los pab koj txhim kho koj 12-txheej PCB txheej txheem tsim.

Hauv kev lag luam hluav taws xob, cov ntawv luam tawm Circuit Board (PCBs) ua lub luag haujlwm tseem ceeb hauv kev sib txuas thiab siv hluav taws xob ntau yam khoom siv hluav taws xob. Raws li thev naus laus zis nce qib, qhov kev thov rau ntau dua thiab nyuaj PCBs nce exponentially. Yog li ntawd, kev tsim PCB tau dhau los ua ib kauj ruam tseem ceeb hauv kev tsim cov khoom siv hluav taws xob zoo.

Ib qho tseem ceeb uas yuav tsum tau xav txog thaum lub sij hawm tsim PCB yog kev npaj nto.Kev kho deg yog hais txog cov txheej txheem los yog ua tiav rau PCB los tiv thaiv nws los ntawm ib puag ncig thiab txhim kho nws txoj haujlwm. Muaj ntau yam kev kho mob saum npoo av muaj, thiab xaiv qhov kev kho mob zoo tshaj plaws rau koj lub rooj tsavxwm 12-txheej txheej tuaj yeem cuam tshuam nws qhov kev ua tau zoo thiab kev ntseeg siab.

1.HASL (kub cua kub solder leveling):
HASL yog ib txoj hauv kev siv dav hauv kev kho mob uas suav nrog dipping PCB rau hauv molten solder thiab tom qab ntawd siv riam cua kub kom tshem tawm cov khoom siv ntau dhau. Txoj kev no muab cov kev daws teeb meem zoo nrog rau cov khoom zoo heev. Txawm li cas los xij, nws muaj qee qhov kev txwv. Lub solder yuav tsis sib npaug ntawm qhov chaw, uas ua rau qhov tsis sib xws. Tsis tas li ntawd, qhov kub thiab txias raug thaum lub sijhawm txheej txheem tuaj yeem ua rau thermal stress ntawm PCB, cuam tshuam rau nws txoj kev ntseeg siab.

2. ENIG (electroless nickel immersion kub):
ENIG yog qhov kev xaiv nrov rau kev kho mob saum npoo vim nws qhov zoo tshaj plaws weldability thiab flatness. Nyob rau hauv cov txheej txheem ENIG, ib txheej nyias ntawm npib tsib xee yog tso rau ntawm qhov chaw tooj liab, ua raws li txheej nyias ntawm kub. Qhov kev kho no ua kom zoo oxidation tsis kam thiab tiv thaiv tooj liab deterioration. Tsis tas li ntawd, qhov sib faib ntawm cov kub ntawm qhov chaw muab ib qho chaw tiaj tus thiab du, ua rau nws haum rau cov khoom zoo-pitch. Txawm li cas los xij, ENIG tsis pom zoo rau cov ntawv thov ntau zaus vim muaj teeb meem tshwm sim los ntawm nickel barrier txheej.

3. OSP (organic solderability preservative):
OSP yog ib txoj kev kho saum npoo uas siv cov txheej txheem nyias nyias ncaj qha rau ntawm qhov chaw tooj liab los ntawm cov tshuaj tiv thaiv. OSP muab cov kev daws teeb meem zoo rau tus nqi thiab ib puag ncig zoo vim nws tsis tas yuav muaj cov hlau hnyav. Nws muab ib qho chaw tiaj tus thiab du kom ntseeg tau zoo heev solderability. Txawm li cas los xij, OSP txheej yog rhiab heev rau cov dej noo thiab xav tau cov kev cia tsim nyog los tswj lawv txoj kev ncaj ncees. OSP-kho boards kuj muaj kev cuam tshuam ntau rau khawb thiab tuav kev puas tsuaj dua li lwm yam kev kho saum npoo.

4. Immersion nyiaj:
Immersion silver, tseem hu ua immersion silver, yog ib qho kev xaiv nrov rau PCBs ntau zaus vim nws cov conductivity zoo heev thiab tsis tshua muaj qhov poob. Nws muab lub tiaj, du nto kom ntseeg tau tias muaj kev ruaj ntseg. Immersion silver yog tshwj xeeb tshaj yog zoo rau PCBs nrog zoo-pitch Cheebtsam thiab high-ceev daim ntaub ntawv. Txawm li cas los xij, cov hniav nyiaj hniav kub zoo li tarnish hauv qhov chaw ntub dej thiab xav tau kev tuav thiab khaws cia kom zoo.

5. Hard kub plating:
Hard kub plating yuav tso ib txheej tuab ntawm kub ntawm tooj liab nto los ntawm cov txheej txheem electroplating. Qhov kev kho saum npoo no ua kom muaj hluav taws xob zoo heev thiab tiv thaiv corrosion, ua rau nws tsim nyog rau cov ntawv thov uas yuav tsum tau rov ua dua thiab tshem tawm cov khoom. Hard kub plating feem ntau yog siv rau ntawm ntug connectors thiab keyboards. Txawm li cas los xij, tus nqi ntawm qhov kev kho mob no kuj tseem siab dua piv rau lwm qhov kev kho saum npoo.

Hauv cov ntsiab lus, xaiv qhov zoo tshaj plaws saum npoo tiav rau 12-txheej PCB yog qhov tseem ceeb rau nws txoj haujlwm thiab kev ntseeg tau.Txhua qhov kev xaiv kho mob saum npoo muaj nws qhov zoo thiab cov kev txwv, thiab kev xaiv nyob ntawm koj qhov kev thov tshwj xeeb thiab kev siv nyiaj txiag. Txawm hais tias koj xaiv cov tshuaj tsuag kom zoo, txhim khu kev qha kub, ib puag ncig tus phooj ywg OSP, high-frequency immersion silver, los yog rugged hard kub plating, nkag siab txog cov txiaj ntsig thiab kev txiav txim siab rau txhua qhov kev kho mob yuav pab koj txhim kho koj cov txheej txheem tsim PCB thiab ua kom muaj kev vam meej. koj cov khoom siv hluav taws xob.