Quick Turn pcb pamwamba chithandizo HASL LF RoHS

Dongosolo loyang'anira dera la HASL nthawi zambiri limatanthawuza njira ya PAD HASL, yomwe imakutira malata pagawo la pad pamwamba pa bolodi. Itha kugwira ntchito ya anti-corrosion ndi anti-oxidation, komanso imatha kuwonjezera malo olumikizirana pakati pa pedi ndi chida chogulitsidwa, ndikuwongolera kudalirika kwa soldering. Kuthamanga kwapadera kumaphatikizapo masitepe angapo monga kuyeretsa, kuika mankhwala a malata, kuthira, ndi kutsuka. Kenako, munjira monga kutentha kwa mpweya wotentha, idzachitapo kanthu kuti ipange mgwirizano pakati pa malata ndi chipangizo cha splice. Kupopera tini pama board ozungulira ndi njira yomwe imagwiritsidwa ntchito kwambiri ndipo imagwiritsidwa ntchito kwambiri pamakampani opanga zamagetsi.

Mtsogoleli wa HASL ndi HASL wopanda lead ndi matekinoloje awiri apamtunda omwe amagwiritsidwa ntchito kwambiri kuteteza zitsulo zama board ozungulira kuti zisawonongeke ndi okosijeni. Pakati pawo, zikuchokera kutsogolera HASL wapangidwa 63% malata ndi 37% kutsogolera, pamene lead wopanda HASL wapangidwa malata, mkuwa ndi zinthu zina (monga siliva, faifi tambala, antimoni, etc.). Poyerekeza ndi HASL yochokera ku lead, kusiyana pakati pa HASL yopanda kutsogolera ndikuti ndi yogwirizana ndi chilengedwe, chifukwa lead ndi chinthu chovulaza chomwe chimayika chilengedwe komanso thanzi la anthu pangozi. Kuphatikiza apo, chifukwa cha zinthu zosiyanasiyana zomwe zili mu HASL yopanda lead, zida zake za soldering ndi zamagetsi ndizosiyana pang'ono, ndipo zimafunikira kusankhidwa molingana ndi zofunikira zogwiritsira ntchito. Nthawi zambiri, mtengo wa HASL wopanda lead ndi wokwera pang'ono kuposa wa HASL wamtovu, koma kuteteza chilengedwe ndi kutheka kwake ndizabwinoko, ndipo zimakondedwa ndi ogwiritsa ntchito ambiri.

Kuti mutsatire malangizo a RoHS, zinthu zama board board ziyenera kukwaniritsa izi:

1. Zomwe zili ndi lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr6+), polybrominated biphenyls (PBB) ndi polybrominated diphenyl ethers (PBDE) ziyenera kukhala zochepa kuposa malire omwe atchulidwa.

2. Zomwe zili muzitsulo zamtengo wapatali monga bismuth, siliva, golidi, palladium, ndi platinamu ziyenera kukhala mkati mwa malire oyenera.

3. Zinthu za halojeni ziyenera kukhala zochepa kuposa malire omwe atchulidwa, kuphatikizapo klorini (Cl), bromine (Br) ndi ayodini (I).

4. Gulu loyang'anira dera ndi zigawo zake ziyenera kuwonetsa zomwe zili ndi kugwiritsa ntchito zinthu zapoizoni ndi zovulaza. Zomwe zili pamwambapa ndi imodzi mwamikhalidwe yayikulu kuti ma board ozungulira atsatire malangizo a RoHS, koma zofunikira zenizeni ziyenera kutsimikiziridwa molingana ndi malamulo amderali.