Mokhoa oa ho qoba boto ea potoloho e hatisitsoeng warping

1. Fokotsa phello ea mocheso khatellong ea boto
Kaha [mocheso] ke mohloli o ka sehloohong oa khatello ea kelello ea boto, hafeela mocheso oa ontong ea reflow o theoha kapa lebelo la ho futhumatsa ha boto le ho pholile ka ontong ea reflow e fokotsehile, warpage ea PCB e ka fokotseha haholo.Leha ho le joalo, litla-morao tse ling li ka 'na tsa etsahala, tse kang li-sholder shorts.

2. Sebelisa leqephe le phahameng la Tg
Tg ke mocheso oa phetoho ea khalase, ke hore, mocheso oo thepa e fetohang ho tloha boemong ba khalase ho ea boemong ba rabara.Ha boleng ba Tg bo tlase ba thepa, boto e qala ho nolofala ka potlako ka mor'a ho kena ka ontong ea reflow, le nako e nkang ho fetoha boemo bo bonolo ba rabara.E tla boela e be nako e telele, 'me deformation ea boto e tla ba e tebileng haholoanyane.Tšebeliso ea pampiri e phahameng ea Tg e ka eketsa bokhoni ba eona ba ho mamella khatello ea maikutlo le deformation, empa theko ea thepa e lumellanang le eona e batla e phahame.

3. Eketsa botenya ba boto ea potoloho
E le ho fihlela botenya bo bobebe le bo bobebe ba lihlahisoa tse ngata tsa elektroniki, botenya ba boto bo siiloe ho 1.0mm, 0.8mm, esita le 0.6mm.Botenya bo joalo bo lokela ho boloka boto hore e se ke ea senyeha ka mor'a ho feta ka sebōpi sa reflow, e hlileng e leng ntho e thata haholo.Fektheri ea PCB e khothalletsa hore haeba ho se na tlhokahalo ea ho ba bobebe le ho ba mosesaane, boto e ka khetha ho sebelisa botenya ba 1.6mm, e leng ho ka fokotsang haholo kotsi ea warpage le deformation ea boto ea PCB.

4. Fokotsa boholo ba boto ea potoloho le ho fokotsa palo ea liphanele
Kaha lionto tse ngata tsa reflow li sebelisa liketane ho khanna boto ea potoloho pele, boto e kholoanyane ea potoloho e tla koaheloa le ho holofala ka ontong ea reflow ka lebaka la boima ba eona, kahoo leka ho beha lehlakore le lelelele la boto ea potoloho joalo ka boto.Ka ketane ea sebōpi sa reflow, deformation ea concave e bakoang ke boima ba boto ea potoloho ka boeona e ka fokotseha.Hona hape ke lebaka la ho fokotsa palo ea liphanele.Ke ho re, ha u feta sebōpi, leka ho sebelisa lehlakoreng le moqotetsane ho ba perpendicular ho tataiso ea sebōpi, e ka finyellang tlaase ka ho fetisisa Palo ea concave deformation.

5. Sebelisa mochini oa terei ea ontong
Haeba mekhoa e ka holimo e le thata ho e finyella, ntho ea ho qetela ke ho sebelisa tray ea ontong (reflow soldering carrier / template) ho fokotsa deformation ea boto ea potoloho.Molao-motheo oa hore mochini oa terei ea ontong o ka fokotsa warpage ea boto ea PCB ke hobane thepa ea sebopeho ke kakaretso.Aluminium alloy kapa majoe a maiketsetso a tla sebelisoa ho ba le mocheso o phahameng oa ho hanyetsa, kahoo fektheri ea PCB e tla lumella boto ea potoloho hore e fete mocheso o phahameng oa mocheso oa mocheso oa ontong ea reflow le shrinkage e batang ka mor'a hore e pholile.Terei e ka bapala mosebetsi oa ho tsitsisa boto ea potoloho.Ka mor'a hore mocheso oa poleiti o fokotsehe ho feta boleng ba Tg mme o qala ho hlaphoheloa le ho thatafala, boholo ba pele bo ka bolokoa.

Haeba mochini oa tray o le mong o ke ke oa fokotsa deformation ea boto ea potoloho , o tlameha ho eketsa lera la sekoahelo ho clamp boto ea potoloho ka literei tse ka holimo le tse ka tlaase, tse ka fokotsang haholo deformation ea boto ea potoloho ka ontong ea reflow..Leha ho le joalo, terei ena ea onto e turu haholo, 'me u tlameha ho eketsa mosebetsi ho e beha le ho sebelisa terei hape.

6. Sebelisa Router ho e-na le boto e nyenyane ea V-Cut
Kaha V-Cut e tla senya matla a sebopeho sa phanele pakeng tsa mapolanka, leka ho se sebelise boto e nyane ea V-Cut, kapa ho fokotsa botebo ba V-Cut.

Ka kopo, potso efe kapa efe e 'ngoe RFQ .