SMT bụ otu n'ime ihe ndị bụ isi components nke electronic components, na-akpọ n'èzí mgbakọ usoro, kewara n'ime ọ dịghị pin ma ọ bụ obere ndu, bụ site na usoro nke reflow soldering ma ọ bụ itinye ego ịgbado ọkụ mgbakọ nke sekit mgbakọ usoro, bụkwa ugbu a kasị ewu ewu na na ụlọ ọrụ mgbakọ eletrọnịkị a Usoro.Site na usoro nke SMT technology ugwu ọzọ nta na Mkpa ọkụ components, nke mere na sekit osisi mezue elu perimeta, miniaturization chọrọ, nke bụkwa na SMT nhazi nkà arịrịọ elu.
I. SMT nhazi solder mado dị mkpa ka ntị
1. Constant okpomọkụ: ụzọ na refrjiraeto okpomọkụ nke 5 ℃ -10 ℃, biko aga n'okpuru 0 ℃.
2. Out of nchekwa: ga-soro ụkpụrụ nduzi nke mbụ ọgbọ mbụ pụta, adịghị na-etolite solder mado na friza nchekwa oge dị ogologo.
3. Ntu oyi: Ghichaa tapawa solder nke ọma ma ọ dịkarịa ala awa 4 mgbe ewepụchara ya na friza, emechila okpu mgbe ị na-ajụ oyi.
4. Ọnọdụ: The ogbako okpomọkụ bụ 25±2 ℃ na ikwu iru mmiri bụ 45% -65% RH.
5. Tapawa ochie eji eme ihe: Mgbe imepechara mkpuchi nke ihe ngbonye ihe n'ime awa 12 iji mee ihe, ọ bụrụ na ịchọrọ idowe, biko jiri karama efu dị ọcha mejuo, wee mechie azụ n'ime friza iji jide.
6. na ego nke mado na stencil: oge mbụ na ego nke solder mado na stencil, iji bipụta ntụgharị adịghị agafe elu nke scraper nke 1/2 dị ka nke ọma, na-eme nlezianya nyocha, ịdị uchu mgbakwunye nke ugboro ịgbakwunye obere ego.
II.SMT mgbawa nhazi ọrụ obibi akwụkwọ dị mkpa iji ṅaa ntị
1. scraper: ihe nchacha kacha mma iji nweta ihe nchara ígwè, na-enye aka na-ebipụta na PAD solder paste molding and stripping film.
Scraper akụkụ: akwụkwọ ntuziaka maka ogo 45-60;ígwè obibi akwụkwọ maka 60 degrees.
Ọsọ ibipụta: akwụkwọ ntuziaka 30-45mm / min;n'ibu 40mm-80mm / min.
Ọnọdụ obibi akwụkwọ: okpomọkụ na 23 ± 3 ℃, iru mmiri 45% -65% RH.
2. Stencil: oghere stencil na-adabere na ọkpụrụkpụ nke stencil na ọdịdị na nha nke oghere dị ka arịrịọ nke ngwaahịa ahụ si dị.
3. QFP / CHIP: oghere etiti bụ ihe na-erughị 0.5mm na 0402 CHIP kwesịrị imeghe ya na laser.
Test stencil: iji kwụsị ule stencil otu ugboro n'izu, a na-arịọ uru erughị ala ka ọ dị elu karịa 35N/cm.
Na-ehicha stencil: Mgbe ị na-ebi akwụkwọ 5-10 PCB na-aga n'ihu, jiri akwụkwọ nhicha na-enweghị uzuzu hichaa stencil otu ugboro.E kwesịghị iji akwa akwa mee ihe.
4. Onye na-ehicha ihe: IPA
Ihe mgbaze: Ụzọ kachasị mma isi kpochapụ stencil bụ iji IPA na mmanya na-egbu egbu, anaghị eji ihe mgbaze nwere chlorine, n'ihi na ọ ga-emebi ihe mejupụtara nke mado ihe na-eme ka ọ dị mma.
Oge nzipu: Jul-05-2023