Lub luag hauj lwm ntawm metallographic microscope nyob rau hauv cov txheej txheem tswj ntawm PCB board technology
Lub luag haujlwm ntawm metallographic microscope hauv PCB board slicing technology hauv kev tswj cov txheej txheem
Kev tsim khoom ntawm PCB board yog txheej txheem uas muaj ntau yam txheej txheem sib koom ua ke. Qhov zoo ntawm cov khoom hauv cov txheej txheem dhau los ncaj qha cuam tshuam rau kev tsim cov txheej txheem tom ntej, thiab txawm tias ncaj qha cuam tshuam rau qhov zoo ntawm cov khoom kawg. Yog li ntawd, kev tswj kom zoo ntawm cov txheej txheem tseem ceeb plays lub luag haujlwm tseem ceeb hauv qhov zoo ntawm cov khoom kawg. Raws li ib qho ntawm txoj kev tshawb nrhiav, metallographic seem thev naus laus zis tau ua lub luag haujlwm tseem ceeb hauv daim teb no.
Lub luag hauj lwm ntawm metallographic microscope nyob rau hauv cov txheej txheem tswj ntawm PCB board slicing tshuab muaj cov nram qab no yam
Lub luag haujlwm hauv kev tshuaj xyuas cov khoom siv raw khoom tuaj
Raws li tooj liab-clad laminate xav tau rau kev tsim ntau txheej PCB boards, nws qhov zoo yuav cuam tshuam ncaj qha rau kev tsim ntau txheej PCB boards. Cov ntaub ntawv tseem ceeb hauv qab no tuaj yeem tau txais los ntawm cov hlais coj los ntawm metallographic microscope:
Copper foil thickness, xyuas seb qhov tooj liab ntawv ci thickness ua tau raws li qhov yuav tsum tau ua ntawm ntau cov ntawv luam tawm.
Lub thickness ntawm insulating dielectric txheej thiab cov txheej txheem ntawm prepreg.
Nyob rau hauv nruab nrab insulating, lub warp thiab weft npaj ntawm iav fibers thiab cov ntsiab lus resin.
Cov ntaub ntawv tsis raug ntawm laminates Qhov tsis xws ntawm laminates feem ntau suav nrog cov hauv qab no:
(1) pinhole
Hais txog lub qhov me me uas nkag mus rau hauv ib txheej ntawm hlau. Rau multilayer luam boards nrog ntau dua thaiv qhov ceev, xws li tsis xws luag feem ntau tsis tso cai.
(2) lub qhov dej thiab qhov dej
Pockmarks hais txog cov qhov me me uas tsis nkag mus rau hauv cov ntawv hlau: cov pits xa mus rau hauv zos dot-zoo li protrusions ntawm pressed steel phaj uas yuav siv tau thaum lub sij hawm nias, uas ua rau ib tug me ntsis sinking tshwm sim nyob rau hauv lub pressed tooj liab ntawv ci nto. Nws tuaj yeem txiav txim siab seb qhov muaj nyob ntawm qhov tsis xws luag yog tso cai los ntawm kev ntsuas qhov loj ntawm lub qhov me me thiab qhov tob ntawm lub sag los ntawm cov seem metallographic.
3) Kos
Kos yog hais txog nyias thiab ntiav grooves kos rau saum npoo ntawm cov ntawv ci tooj liab los ntawm cov khoom ntse. Qhov dav thiab qhov tob ntawm khawb yog ntsuas los ntawm metallographic microscope seem los txiav txim seb puas muaj qhov tsis xws luag raug tso cai.
(4) Wrinkles
Wrinkles yog creases los yog wrinkles nyob rau hauv daim ntawv tooj liab nyob rau saum npoo ntawm platen. Lub hav zoov ntawm qhov tsis xws luag pom los ntawm metallographic seem tsis raug tso cai.
(5) Lamination voids, dawb me ntsis thiab hlwv
Lamination voids xa mus rau thaj chaw uas yuav tsum muaj cov resin thiab nplaum nyob rau hauv lub laminate, tab sis cov filling tsis tiav thiab muaj cov chaw uas ploj lawm; dawb me ntsis tshwm sim hauv lub substrate, thiab qhov tshwm sim ntawm kev sib cais ntawm cov iav fiber ntau thiab resin ntawm cov ntaub interweaving yog manifested nyob rau hauv Scattered dawb me ntsis los yog "cross qauv" tshwm nyob rau hauv lub nto ntawm lub substrate; blistering yog hais txog qhov tshwm sim ntawm kev nthuav dav hauv zos thiab kev sib cais hauv zos ntawm cov txheej txheem ntawm cov substrate lossis nruab nrab ntawm cov substrate thiab cov ntawv ci tooj liab. Qhov muaj qhov tsis xws luag yog nyob ntawm qhov xwm txheej tshwj xeeb los txiav txim siab seb puas yuav tso cai.
