IPC-6012, SMB-SMT E hatisitsoeng mapolanka a potoloho ho ba le warpage e phahameng kapa ho sotha ho 0.75%, 'me mapolanka a mang ka kakaretso ha a fete 1.5%;warpage e amohelehang (mahlakore a mabeli / a mangata) ea semela sa kopano ea elektronike hangata ke 0.70 ---0.75%, (1.6mm botenya) Ha e le hantle, mapolanka a mangata a kang SMB le BGA board a hloka warpage e ka tlaase ho 0.5%;lifeme tse ling esita le tse ka tlaase ho 0.3%;PC-TM-650 2.4.22B

Mokhoa oa ho bala oa leqephe la ntoa = bophahamo ba leqephe la ntoa/bolelele bo kobehileng
Feme ea boto ea potoloho ea betri e u ruta mokhoa oa ho thibela ntoa ea boto ea potoloho:

1. Moralo oa boenjiniere: tlhophiso ea prepreg ea interlayer e lokela ho lumellana;multi-layer core board le prepreg li lokela ho sebelisa sehlahisoa se tšoanang sa mofani oa thepa;sebaka sa ka ntle sa litšoantšo sa C / S se lokela ho ba haufi ka hohle kamoo ho ka khonehang, 'me li-grids tse ikemetseng li ka sebelisoa;

2. Boto ea ho baka pele u khaola
Ka kakaretso likhato tse 150 bakeng sa lihora tse 6-10, tlosa mongobo ka boto, ka ho eketsehileng etsa hore resin e phekole ka ho feletseng, 'me u felise khatello ea kelello ka boto;ho baka boto pele u khaola, ho sa tsotellehe hore na ho na le lera le ka hare kapa mahlakore ka bobeli a hlokahalang!

3. Ela hloko tsela e theohileng le ea weft ea lakane e phekotsoeng pele u bokella boto ea multilayer:
The warp le weft shrinkage ratio e fapane.Ela hloko tataiso ea warp le weft pele u khaola lakane ea prepreg;ela hloko tataiso ea warp le weft ha u seha boto ea mantlha;ka kakaretso, tataiso ea moqolo oa lakane ke tsela e hlabang;tataiso e telele ea laminate ea koporo ke tataiso ea warp;Likarolo tse 10 4OZ Matla a poleiti ea koporo e teteaneng

4. Laminating e teteaneng ho felisa khatello ea kelello, ho hatella ho bata ka mor'a ho hatella boto, fokotsa li-burrs;

5. Boto ea ho baka pele ho cheka: likhato tse 150 bakeng sa lihora tse 4;

6. Ho molemo hore u se ke ua hlatsoa poleiti e tšesaane ka mochine, 'me ho khothalletsoa ho hloekisa lik'hemik'hale;lisebelisoa tse khethehileng li sebelisoa nakong ea electroplating ho thibela poleiti hore e se ke ea kobeha le ho phutha

7. Ka mor'a ho fafatsa thini, iphole ka tlhaho ho mocheso oa kamore holim'a 'mabole o bataletseng kapa poleiti ea tšepe kapa u hloeke ka mor'a hore u pholile holim'a bethe e phaphametseng moea;