Ụfọdụ nkịtị nsogbu na ngwọta na soldering

Ụfụfụ na PCB mkpụrụ mgbe SMA soldering

Isi ihe kpatara ọdịdị nke ntu nha mgbe ịgbado ọkụ SMA gasịrị bụkwa mmiri nke etinyere na mkpụrụ PCB, ọkachasị na nhazi nke mbadamba multilayer.N'ihi na multilayer osisi mere nke multi-layer epoxy resin prepreg na mgbe ahụ na-ekpo ọkụ-enwe, ma ọ bụrụ na nchekwa oge nke epoxy resin ọkara curing ibe dị mkpụmkpụ, na resin ọdịnaya ezughị, na mmiri mwepụ site tupu ihicha adịghị ọcha. ọ dị mfe iburu mmiri vapo mgbe ịpịrị ọkụ.Ọzọkwa n'ihi na ọkara siri ike n'onwe ya gluu ọdịnaya ezughị, adhesion n'etiti n'ígwé ezughị na-ahapụ egosipụta.Na mgbakwunye, mgbe PCB zụtara, n'ihi ogologo oge nchekwa na iru mmiri na gburugburu ebe obibi, mgbawa na-adịghị tupu butere na oge tupu mmepụta, na moistened PCB na-adịkarị mfe ka ọnya.

Ngwọta: Enwere ike itinye PCB na nchekwa mgbe nnabata;A ga-ebu ụzọ sie PCB na (120 ± 5) ℃ maka awa 4 tupu etinye ya.

Mepee sekit ma ọ bụ ire ere ụgha nke IC pin ka emechara ya

Ihe kpatara ya:

1) Coplanarity na-adịghị mma, ọkachasị maka ngwaọrụ fqfp, na-eduga na nrụrụ pin n'ihi nchekwa na-ezighi ezi.Ọ bụrụ na onye na-ebuli elu enweghị ọrụ nke ịlele coplanarity, ọ dịghị mfe ịchọpụta.

2) Ogbenye solderability nke atụdo, ogologo nchekwa oge nke IC, yellowing nke pin na ogbenye solderability bụ isi ihe na-akpata ire ere ụgha.

3) Solder mado nwere adịghị mma mma, ala metal ọdịnaya na ogbenye solderability.The solder tapawa a na-ejikarị maka ịgbado ọkụ ngwaọrụ fqfp kwesịrị inwe a metal ọdịnaya ihe na-erughị 90%.

4) Ọ bụrụ na preheating okpomọkụ dị oke elu, ọ dị mfe ime ka oxidation nke IC atụdo na-eme ka solderability njọ.

5) The size nke ibipụta template window bụ obere, nke mere na ego nke solder mado ezughị.

Usoro nke mmezi:

6) Lezienụ anya na nchekwa nke ngwaọrụ ahụ, ewerela akụrụngwa ma ọ bụ mepee ngwugwu.

7) N'oge mmepụta, a ga-enyocha solderability nke components, karịsịa oge nchekwa IC ekwesịghị ịdị ogologo (n'ime otu afọ site na ụbọchị emepụtara), na IC ekwesịghị ikpughe elu okpomọkụ na iru mmiri n'oge nchekwa.

8) Jiri nlezianya lelee nha nke windo ndebiri, nke na-ekwesịghị ịdị oke ma ọ bụ dị ntakịrị, ma ṅaa ntị ka ọ kwekọọ na PCB pad size.