Ceev tig pcb nto kho HASL LF RoHS

Cov txheej txheem Circuit Board HASL feem ntau yog hais txog cov txheej txheem pad HASL, uas yog los npog cov tin rau ntawm thaj chaw ncoo ntawm qhov chaw ntawm lub rooj tsavxwm. Nws tuaj yeem ua lub luag haujlwm ntawm kev tiv thaiv corrosion thiab tiv thaiv oxidation, thiab tseem tuaj yeem ua rau thaj chaw sib cuag ntawm lub ncoo thiab cov khoom siv soldered, thiab txhim kho kev ntseeg tau ntawm soldering. Cov txheej txheem tshwj xeeb ntws suav nrog ntau cov kauj ruam xws li kev tu, tshuaj lom neeg tso ntawm tin, soaking, thiab rinsing. Tom qab ntawd, nyob rau hauv cov txheej txheem xws li cua kub soldering, nws yuav hnov ​​​​mob los ua ib daim ntawv cog lus ntawm cov tin thiab cov khoom sib txuas. Tin spraying on circuit boards yog ib txoj kev siv ntau thiab siv dav hauv kev tsim khoom siv hluav taws xob.

Lead HASL thiab lead-free HASL yog ob txoj kev kho saum npoo av uas yog siv los tiv thaiv cov hlau ntawm Circuit Court boards los ntawm corrosion thiab oxidation. Ntawm lawv, cov hmoov lead HASL yog tsim los ntawm 63% tin thiab 37% txhuas, thaum tsis muaj hlau lead HASL yog tsim los ntawm tin, tooj liab thiab lwm yam (xws li nyiaj, npib tsib xee, antimony, thiab lwm yam). Piv nrog cov hmoov lead-based HASL, qhov sib txawv ntawm cov hlau lead-dawb HASL yog tias nws yog ib puag ncig zoo dua qub, vim tias txhuas yog cov khoom tsis zoo uas cuam tshuam rau ib puag ncig thiab tib neeg kev noj qab haus huv. Tsis tas li ntawd, vim muaj cov ntsiab lus sib txawv uas muaj nyob hauv HASL tsis muaj hlau lead, nws cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob sib txawv me ntsis, thiab nws yuav tsum tau xaiv raws li cov ntawv thov tshwj xeeb. Feem ntau hais lus, tus nqi ntawm cov hlau lead-dawb HASL yog me ntsis siab dua li cov hlau lead HASL, tab sis nws cov kev tiv thaiv ib puag ncig thiab kev ua tau zoo dua, thiab nws nyiam los ntawm cov neeg siv ntau dua.

Txhawm rau ua raws li RoHS cov lus qhia, cov khoom lag luam hauv Circuit Court yuav tsum tau ua raws li cov hauv qab no:

1. Cov ntsiab lus ntawm cov hlau lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr6+), polybrominated biphenyls (PBB) thiab polybrominated diphenyl ethers (PBDE) yuav tsum tsawg dua li cov nqi txwv.

2. Cov ntsiab lus ntawm cov hlau tseem ceeb xws li bismuth, nyiaj, kub, palladium, thiab platinum yuav tsum nyob rau hauv qhov kev txwv tsim nyog.

3. Cov ntsiab lus halogen yuav tsum tsawg dua li cov nqi txwv, suav nrog chlorine (Cl), bromine (Br) thiab iodine (I).

4. Lub rooj tsav xwm hauv Circuit Court thiab nws cov khoom yuav tsum tau qhia txog cov ntsiab lus thiab kev siv cov tshuaj lom thiab cov teeb meem cuam tshuam. Cov saum toj no yog ib qho ntawm cov xwm txheej tseem ceeb rau lub rooj tsav xwm hauv Circuit Court kom ua raws li RoHS cov lus qhia, tab sis cov kev cai tshwj xeeb yuav tsum tau txiav txim siab raws li cov cai hauv zos thiab cov qauv.