Mamiriro ezvakatipoteredza ekuchengetera zvinhu zvinosangana nepamusoro:
1. Ambient tembiricha: kuchengetedza tembiricha <40 ℃
2. Kugadzira nzvimbo yekushisa <30 ℃
3. Ambient humidity: <RH60%
4. Mamiriro ekunze: hapana magasi ane chepfu akadai sesarufa, chlorine uye asidhi inokanganisa kushanda kwewelding inobvumirwa munzvimbo yekuchengetedza uye yekushanda.
5. Antistatic matanho: kusangana neantistatic zvinodiwa zveSMT zvikamu.
6. Nguva yekuchengetedza yezvikamu: nguva yekuchengetedza haifaniri kudarika makore maviri kubva pazuva rekugadzirwa kwemugadziri wechikamu;Nguva yekuverenga yevashandisi vefekitori yemuchina mushure mekutenga kazhinji haipfuuri gore rimwe;Kana fekitari iri munzvimbo yakasikwa yakasviba, zvikamu zveSMT zvinofanira kushandiswa mukati memwedzi ye3 mushure mekutenga, uye matanho akakodzera emvura-uchapupu anofanira kutorwa munzvimbo yekuchengetedza uye kuputirwa kwezvikamu.
7. SMD midziyo ine mwando kuramba zvinodiwa.Inofanirwa kushandiswa mukati meawa makumi manomwe nemaviri mushure mekuvhurwa uye isingapfuuri vhiki imwe.Kana isingakwanisi kushandiswa kumusoro, inofanira kuchengetwa muDRYING bhokisi reRH20%, uye michina yeSMD inenge yakanyorova inofanira kuomeswa uye yakasvibiswa maererano nezvinodiwa.
8. Iyo SMD (SOP, Sj, lCC neQFP, nezvimwewo) yakaputirwa muhubhu yepurasitiki haisi yakakwirira yekushisa uye haigoni kubikwa zvakananga muchoto.Inofanira kuiswa muchubhu yesimbi kana tireyi yesimbi kuti inobikwa.
9. QFP kurongedza epurasitiki ndiro haisi yakakwirira tembiricha uye yakakwirira tembiricha kuramba maviri.High tembiricha inodzivirira (chinyorwa Tmax = 135 ℃, 150 ℃ kana MAX180 ℃, nezvimwewo) inogona kuiswa yakananga muchoto yekubheka;Kwete tembiricha yepamusoro haigone kuve yakananga muchoto kubikira, kana tsaona, inofanira kuiswa mundiro yesimbi yekubheka.Kukuvadza kwepini kunofanira kudzivirirwa panguva yekutenderera, kuitira kuti irege kuparadza zvinhu zvavo zvekoplanar.
Kutakura, kuronga, kuongorora kana kuisa nemaoko:
Kana iwe uchida kutora iyo SMD mudziyo, pfeka ESD wrist tambo uye shandisa peni kuyamwa kudzivirira kukuvadza mapini eSOP neQFP zvishandiso kudzivirira pini warping uye deformation.
Iyo yasara SMD inogona kuchengetwa sezvinotevera:
Yakashongedzerwa neakakosha yakaderera tembiricha uye yakaderera humidity yekuchengetedza bhokisi.Chengetedza iyo SMD isingashandiswe kwenguva pfupi mushure mekuvhura kana pamwe chete neyekudyisa mubhokisi.Asi yakashongedzerwa neyakakura yakakosha tembiricha uye yakaderera humidity yekuchengetedza tank inodhura zvakanyanya.
Shandisa mabhegi ekurongedza epakutanga.Chero bedzi bhegi racho rakasimba uye desiccant iri mumamiriro akanaka (ese madenderedzwa madenderedzwa pane humidity chiratidzo kadhi ndeyebhuruu, isina pink), iyo SMD isina kushandiswa inogona kuramba ichidzoserwa mubhegi uye yakasimbiswa ne tepi.
Nguva yekutumira: Sep-14-2021