Kusamala Pogwiritsa Ntchito Zida za SMT

Mikhalidwe ya chilengedwe kusungirako zigawo za msonkhano:
1. Kutentha kozungulira: kutentha kosungirako <40 ℃
2. Kupanga malo kutentha <30 ℃
3. Chinyezi chozungulira: <RH60%
4. Chilengedwe cha chilengedwe: palibe mpweya wa poizoni monga sulfure, klorini ndi asidi zomwe zimakhudza ntchito yowotcherera zimaloledwa kumalo osungira ndi opangira ntchito.
5. Miyezo ya Antistatic: kukwaniritsa zofunikira za antistatic za zigawo za SMT.
6. Nthawi yosungiramo zigawo: nthawi yosungiramo sichitha kupitirira zaka 2 kuchokera pa tsiku la kupanga chigawocho;Nthawi yowerengera ya ogwiritsa ntchito fakitale yamakina mutagula nthawi zambiri siyiposa chaka chimodzi;Ngati fakitale ili m'malo achilengedwe a chinyezi, zigawo za SMT ziyenera kugwiritsidwa ntchito mkati mwa miyezi 3 mutagula, ndipo njira zoyenera zowonetsera chinyezi ziyenera kuchitidwa m'malo osungiramo zinthu ndi kulongedza zigawozo.
7. Zipangizo za SMD zokhala ndi zofunikira zokana chinyezi.Iyenera kugwiritsidwa ntchito mkati mwa maola 72 mutatsegula komanso osapitilira sabata imodzi.Ngati sichikhoza kugwiritsidwa ntchito, chiyenera kusungidwa mu bokosi la DRYING la RH20%, ndipo zipangizo za SMD zomwe zakhala zonyowa ziyenera kuuma ndi kusungunuka malinga ndi zomwe zaperekedwa.
8. SMD (SOP, Sj, lCC ndi QFP, etc.) yodzaza mu chubu la pulasitiki sichitha kutentha kwambiri ndipo sichikhoza kuphikidwa mwachindunji mu uvuni.Iyenera kuyikidwa mu chubu chachitsulo kapena thireyi yachitsulo kuti iphike.
9. QFP ma CD pulasitiki mbale si mkulu kutentha ndi kutentha kukana awiri.Kutentha kwapamwamba (chidziwitso Tmax = 135 ℃, 150 ℃ kapena MAX180 ℃, etc.) akhoza kuikidwa mwachindunji mu uvuni kuti aziphika;Osati kutentha kwambiri sangakhale mwachindunji mu uvuni kuphika, ngati ngozi, ayenera kuikidwa mu mbale zitsulo kuphika.Kuwonongeka kwa zikhomo kuyenera kupewedwa panthawi yozungulira, kuti asawononge katundu wawo wa coplanar.
Kuyendera, kusanja, kuyang'anira kapena kuyika pamanja:

Ngati mukufuna kutenga chipangizo cha SMD, valani lamba wa ESD ndikugwiritsa ntchito cholembera kuti mupewe kuwononga mapini a zida za SOP ndi QFP kuti mupewe kupindika kwa pini ndi kusintha.
SMD yotsalayo ikhoza kupulumutsidwa motere:

Okonzeka ndi kutentha kwapadera otsika ndi otsika chinyezi chosungira bokosi.Sungani SMD yomwe sikugwiritsidwa ntchito kwakanthawi mutatsegula kapena pamodzi ndi chodyetsa m'bokosi.Koma okonzeka ndi lalikulu lapadera kutentha otsika ndi otsika chinyezi kusungirako thanki ndalama zambiri.

Gwiritsani ntchito matumba oyikapo osakhazikika.Malingana ngati thumba liri bwino ndipo desiccant ili bwino (zozungulira zonse zakuda pa khadi lowonetsera chinyezi ndi buluu, palibe pinki), SMD yosagwiritsidwa ntchito ikhoza kubwezeretsedwanso m'thumba ndikusindikizidwa ndi tepi.