Akpachara anya maka iji Ngwa SMT

Ọnọdụ gburugburu ebe obibi maka nchekwa nke akụrụngwa mgbakọ elu:
1. Ambient okpomọkụ: nchekwa okpomọkụ <40 ℃
2. Mmepụta saịtị okpomọkụ <30 ℃
3. iru mmiri gburugburu: <RH60%
4. Environment ikuku: ọ dịghị gas na-egbu egbu dị ka sọlfọ, chlorine na acid nke na-emetụta ọrụ ịgbado ọkụ na-ekwe na nchekwa na arụ ọrụ gburugburu ebe obibi.
5. Antistatic jikoro: izute antistatic chọrọ nke SMT components.
6. Oge nchekwa nke akụrụngwa: oge ​​nchekwa agaghị agafe afọ 2 site na ụbọchị mmepụta nke onye na-emepụta ihe;Oge ngwa ahịa nke ndị ọrụ ụlọ ọrụ igwe mgbe azụrụchara anaghị agafe otu afọ;Ọ bụrụ na ụlọ ọrụ mmepụta ihe dị na gburugburu ebe obibi iru mmiri, a ga-eji ihe SMT eme ihe n'ime ọnwa 3 mgbe ịzụrụ ya, a ga-ewerekwa ihe mgbochi mmiri kwesịrị ekwesị na ebe nchekwa na nkwakọ ngwaahịa.
7. Ngwa SMD nwere ihe mgbochi mmiri chọrọ.A ghaghị iji ya mee ihe n'ime awa 72 ka emepechara ma ọ bụghị ihe karịrị otu izu.Ọ bụrụ na enweghị ike iji ya mee ihe, a ga-echekwa ya n'ime igbe DRYING nke RH20%, na ngwaọrụ SMD ndị na-ekpo ọkụ kwesịrị ka akpọnwụ ma kpochaa ya dịka ndokwa ahụ si dị.
8. The SMD (SOP, Sj, lCC na QFP, wdg) juru n'ọnụ na plastic tube adịghị elu okpomọkụ na-eguzogide na-apụghị ozugbo butere na oven.A ga-etinye ya na tube ígwè ma ọ bụ traị ígwè ka a ga-esi sie ya.
9. QFP nkwakọ ngwaahịa plastik abụghị nnukwu okpomọkụ na elu okpomọkụ na-eguzogide abụọ.Nnukwu okpomọkụ na-eguzogide (dee Tmax = 135 ℃, 150 ℃ ma ọ bụ MAX180 ℃, wdg) nwere ike tinye ozugbo n'ime oven maka ime achịcha;Ọ bụghị okpomọkụ dị elu enweghị ike ịbanye ozugbo n'ime oven oven, ọ bụrụ na ihe mberede mere, a ga-etinye ya na efere ígwè maka ime achịcha.Ekwesịrị igbochi mmebi nke ntụtụ ahụ n'oge ntụgharị, ka ọ ghara ibibi ihe onwunwe coplanar ha.
Ụgbọ njem, nhazi, nleba anya ma ọ bụ ntinye akwụkwọ ntuziaka:

Ọ bụrụ na ịchọrọ iji ngwaọrụ SMD, yiri eriri nkwojiaka ESD wee jiri mkpịsị mkpịsị mkpịsị aka zere imebi ntụtụ ngwaọrụ SOP na QFP iji gbochie nrụrụ pin na nrụrụ.
Enwere ike ịchekwa SMD fọdụrụ dị ka ndị a:

Ejiri ya na obere okpomọkụ pụrụ iche yana igbe nchekwa dị ala.Chekwaa SMD nke a na-ejighị nwa oge ka emepechara ma ọ bụ ya na onye na-enye nri na igbe ahụ.Ma kwadebere na nnukwu pụrụ iche ala okpomọkụ na ala iru mmiri nchekwa tank-eri elu.

Jiri akpa nkwakọ ngwaahịa emeghị eme.Ọ bụrụhaala na akpa ahụ adịghị emebi emebi na desiccant nọ n'ọnọdụ dị mma ( okirikiri ojii niile dị na kaadị egosi iru mmiri na-acha anụnụ anụnụ, enweghị pink), SMD na-ejighị ya ka nwere ike itinyeghachi ya na akpa ma jiri teepu mechie.