Printed Circuit Board (PCB) kev tsim khoom siv ntau lub tshuab laser los tsim microvias- qhov me me siv los txuas cov txheej txheem sib txawv ntawm PCB. Cov microvias no yog qhov tseem ceeb rau siab - kev sib cuam tshuam ntawm cov khoom siv hluav taws xob niaj hnub no, xws li smartphones thiab computers. Laser drilling muaj precision thiab efficiency piv rau cov tsoos mechanical txoj kev. Txawm li cas los xij, cov txheej txheem no suav nrog siab - lub zog lasers uas ua rau muaj kev nyab xeeb tseem ceeb, ua kom muaj kev tiv thaiv laser zoo tseem ceeb heev. Kab lus no tshawb txog cov khoom siv laser uas siv hauv PCB microvia drilling thiab qhia cov ntsiab lus tseem ceeb raulaser kev ruaj ntseg khoom. Los ntawm kev nkag siab txog cov ntsiab lus no, cov tuam txhab tsim khoom tuaj yeem ua kom muaj kev nyab xeeb thiab ua haujlwm zoo dua.
Common Laser Sources hauv PCB Microvia Drilling
Laser qhov chaw raug xaiv raws li lawv lub wavelength, lub zog, thiab kev cuam tshuam nrog PCB cov ntaub ntawv xws li tooj liab thiab dielectric substrates. Lub hom phiaj yog kom ua tiav qhov huv huv, meej yam tsis muaj kev puas tsuaj ib puag ncig. Nov yog thawj hom lasers siv hauv daim ntawv thov no, ua kom cov lus piav qhia nkag mus rau cov neeg tuaj saib.
Ultraviolet (UV) Lasers:
UV lasers ua haujlwm ntawm wavelengths ib ncig ntawm 355 nm, muab lub zog photon siab uas tso cai rau cov ntaub ntawv meej meej. Lawv yog cov zoo tagnrho rau drilling microvias nyob rau hauv PCBs vim lawv muaj peev xwm mus vaporize nyias copper txheej thiab dielectric cov ntaub ntawv nrog tsawg tshav kub- thaj tsam cuam tshuam. Qhov no txo cov burring thiab txhim kho qhov zoo, ua UV lasers haum rau siab -cov ntaub ntawv raug xws li multilayer boards. Cov txiaj ntsig tseem ceeb suav nrog kev daws teeb meem zoo thiab kev sib raug zoo nrog ntau yam PCB substrates, txawm tias lawv xav tau cov tshuab cua txias kom ruaj khov los tswj kev ua haujlwm.
Cov pa roj carbon dioxide (CO2) lasers:
CO2 lasers emit infrared lub teeb ntawm wavelengths txog 10.6 μm, uas yog absorbed zoo los ntawm organic cov ntaub ntawv xws li epoxy resins nyob rau hauv PCBs. Lawv ua tau zoo ntawm drilling qhov loj dua los yog tshem tawm cov txheej txheem dielectric zoo. CO2 lasers feem ntau yog siv rau qhov pib qhov tsim, tshwj xeeb tshaj yog nyob rau hauv thicker boards, vim hais tias lawv muaj zog tso zis ntau zog thiab nqi -effectiveness. Txawm li cas los xij, lawv qhov ntev wavelength tuaj yeem ua rau thermal puas rau tooj liab, yog li lawv feem ntau ua ke nrog lwm cov txheej txheem rau kev pom zoo.
Ntsuab Lasers:
Green lasers, nrog wavelengths nyob ib ncig ntawm 532 nm, muab qhov sib npaug ntawm UV thiab infrared qhov chaw. Lawv nkag mus rau tooj liab zoo thaum txo cov cua sov dispersion, ua rau lawv muaj txiaj ntsig zoo rau drilling microvias hauv tooj liab- clad laminates. Green lasers muab qhov zoo ntawm cov nqi nruab nrab thiab tsawg dua ua rau micro- tawg piv rau IR lasers. Qhov no ua rau lawv muaj ntau yam kev xaiv rau cov txheej txheem PCB tsim, tshwj xeeb yog qhov xav tau kev ceev thiab qhov tseeb.
Txhua hom laser muaj cov ntawv thov tshwj xeeb raws li PCB tsim cov cai, xws li qhov loj thiab cov khoom muaj pes tsawg leeg. Cov neeg ua haujlwm yuav tsum ntsuas qhov ntsuas tsis zoo xws li lub sijhawm mem tes thiab lub zog kom tsis txhob muaj qhov tsis xws luag, ua kom muaj qhov zoo sib xws ntawm microvia. Zuag qhia tag nrho, UV thiab ntsuab lasers yog qhov zoo dua rau kev nplua -pitch drilling, thaum CO2 lasers ua haujlwm ntau dua.
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Laser Safety Requirements rau cov khoom siv tiv thaiv
Laser kev ua haujlwm hauv PCB microvia drilling tsim cov kab mob hnyav thiab cov khoom tsim kev puas tsuaj, suav nrog cov hluav taws xob cuam tshuam thiab cov pa taws. Yog tias tsis muaj kev tiv thaiv zoo, cov neeg ua haujlwm ntsib kev pheej hmoo xws li kev raug mob ntawm qhov muag (xws li, kev puas tsuaj rau lub qhov muag) thiab cov tawv nqaij kub hnyiab. Cov qauv kev nyab xeeb thoob ntiaj teb, zoo li cov los ntawm ANSI thiab ISO, tswj hwm kev tiv thaiv tshwj xeeb. Cov kev cai no tsom rau kev tswj xyuas engineering,Cov khoom siv tiv thaiv tus kheej (PPE),thiab kev tiv thaiv ib puag ncig kom txo qhov raug.
Cov kev cai tseem ceeb raulaser kev ruaj ntseg khoomsuav nrog:
Kev Tiv Thaiv Qhov Muag:
Laser kev ruaj ntseg eyewearyuav tsum tau hnav los ntawm txhua tus neeg ua haujlwm nyob ib puag ncig ntawm cov khoom siv drilling. Cov tsom iav lossis tsom iav yuav tsum phim lub laser wavelength (xws li, UV, pom, lossis IR) thiab muaj qhov ntsuas qhov muag pom (OD) txaus los thaiv cov hluav taws xob tsis zoo. Piv txwv li, UV lasers xav tau OD qhov ntsuas siab tshaj 5 kom ntseeg tau tias tsis muaj kev sib kis ntawm lub teeb puas. Lub lens yuav tsum ruaj khov, khawb- tiv taus, thiab muab kev pom meej meej rau cov neeg ua haujlwm saib xyuas cov txheej txheem. Kev tshuaj xyuas tsis tu ncua thiab ntawv pov thawj ntawm cov looj tsom iav yog qhov tseem ceeb kom muaj txiaj ntsig zoo.
Daim tawv nqaij thiab lub cev tiv thaiv:
Cov khaub ncaws tiv thaiv, xws li cov tsho hauv tsev kawm ntawv lossis cov aprons, yuav tsum npog cov tawv nqaij kom tiv thaiv kev kub nyhiab los ntawm lub teeb tawg tawg los yog cov khib nyiab kub. Cov ntaub ntawv yuav tsum yog nplaim taws- tiv taus thiab tsis yog- cuam tshuam kom tsis txhob cuam tshuam cov nqaj. Rau siab - lub zog lasers, tag nrho - lub cev suits tej zaum yuav tsim nyog, tshwj xeeb tshaj yog thaum kho. Tsis tas li ntawd, hnab looj tes tsim raulaser kev nyab xeebpab tiv thaiv txhais tes thaum tuav cov khoom, xyuas kom lawv ua tau raws li cov qauv rau thermal thiab radiant zog tsis kam.
Engineering thiab Environmental Controls:
Tshaj li PPE, cov chaw ua haujlwm yuav tsum koom nrog kev tswj xyuas engineering xws li kab teeb ci, kev cuam tshuam, thiab lub tshuab ua pa. Cov ntaub thaiv npog muaj txoj hauv kev laser thiab tiv thaiv kev raug xwm txheej, thaum kev sib cuam tshuam tau kaw cov khoom siv yog ua txhaum cai. Cov tshuab cua tshuab tshem tawm cov pa tawm thaum lub sij hawm drilling, xws li hlau vapors, kom txo tau qhov kev pheej hmoo ntawm kev nqus pa. Cov cim ceeb toom thiab kev txwv tsis pub nkag mus rau hauv thaj chaw laser txuas ntxiv txhim kho kev nyab xeeb, xav tau kev cob qhia rau txhua tus neeg ua haujlwm ntawm cov txheej txheem xwm txheej ceev.
Ua raws li cov kev cai no tsis yog ua raws li cov cai nkaus xwb tab sis kuj tiv thaiv kev sib tsoo thiab kev poob qis. Kev tshuaj xyuas kev nyab xeeb tsis tu ncua thiab kev cob qhia cov neeg ua haujlwm txhawb nqa kev coj noj coj ua ntawm kev nyab xeeb, ua kom ntev - lub sijhawm ua haujlwm tau zoo hauv PCB kev tsim khoom.
Xaus
Hauv PCB microvia drilling, lasers xws li UV, CO2, thiab ntsuab qhov chaw yog qhov tseem ceeb rau kev ua tiav siab - qhov tseeb, tab sis lawv qhia txog cov teeb meem tseem ceeb uas xav tau kev tiv thaiv zoo. Kev nkag siab txog cov yam ntxwv ntawm txhua hom laser pab txhim kho cov txheej txheem drilling, thaum ua raws li cov kev cai ruaj ntseg nruj- xws li cov tsom iav tshwj xeeb, cov khaub ncaws tiv thaiv, thiab kev tswj xyuas engineering- tiv thaiv cov neeg ua haujlwm thiab cov chaw. Los ntawm qhov tseem ceeblaser kev nyab xeeb, manufacturers tuaj yeem txhim kho kev tsim khoom thiab kev ntseeg siab hauv kev tsim khoom siv hluav taws xob. Nco ntsoov sab laj cov lus qhia txog kev nyab xeeb rau cov lus pom zoo tam sim no hauv koj cheeb tsam.