IPC-6012, SMB-SMT Yakadhindwa mapuranga edunhu kuve nehondo yakanyanya kana twist ye0.75%, uye mamwe mabhodhi kazhinji haapfuure 1.5%;iyo inobvumirwa warpage (double-sided/multi-layer) yemagetsi ekugadzira magetsi inowanzoita 0.70 ---0.75%, (1.6mm ukobvu) Kutaura zvazviri, mapuranga akawanda akadai seSMB uye BGA mabhodhi anoda warpage isingasviki 0.5%;mamwe mafekitari kunyange asingasviki 0.3%;PC-TM-650 2.4.22B

Warpage kuverenga nzira = warpage kureba/curved kumucheto kureba
Iyo bhatiri redunhu bhodhi fekitori inokudzidzisa nzira yekudzivirira redunhu bhodhi warpage:

1. Injiniya dhizaini: kurongeka kweiyo interlayer prepreg kunofanirwa kuenderana;iyo yakawanda-layer core board uye prepreg inofanirwa kushandisa imwechete chigadzirwa chemupi;nzvimbo yekunze yeC / S yemifananidzo inofanira kunge iri pedyo sezvinobvira, uye magiradhi akazvimirira anogona kushandiswa;

2. Baking board vasati vacheka
Kazhinji 150 madhigirii kwemaawa 6-10, bvisa unyoro mubhodhi, wedzera kuita kuti resin ipere zvachose, uye kubvisa kushushikana mubhodhi;kubika bhodhi isati yacheka, ingave mukati memukati kana mativi maviri anodiwa!

3. Teerera kune iyo warp uye weft kwairi kwepepa rapora usati warongedzera bhodhi rakawanda:
Iyo warp uye weft shrinkage ratio yakasiyana.Chenjerera kune warp uye weft direction usati wacheka prepreg sheet;teerera kune warp uye weft kutungamira paunenge uchicheka bhodhi repakati;kazhinji chirairo chepepa roll direction ndiyo warp direction;iyo yakareba nzira yemhangura yakavhara laminate ndiyo warp direction;10 akaturikidzana 4OZ Simba gobvu ndiro yemhangura

4. Laminating gobvu kubvisa kushushikana, kutonhora kudzvanya mushure mekudzvanya bhodhi, cheka maburrs;

5. Baking board vasati vachera: 150 degrees kwemaawa mana;

6. Zvakanakisisa kuti usashandise mechanical kukwesha ndiro yakaonda, uye kuchenesa kemikari kunokurudzirwa;zvakakosha zvigadziriso zvinoshandiswa panguva ye electroplating kudzivirira ndiro kubva pakukotama nekupeta

7. Mushure mekupfapfaidza tini, zvitonhodzei kusvika patembiricha yekamuri padombo rakati sandara kana ndiro resimbi kana kuti kuchenesa mushure mekutonhodzwa pamubhedha unoyangarara;