IPC-6012, SMB-SMT Luam tawm circuit boards muaj qhov siab tshaj plaws warpage los yog twist ntawm 0.75%, thiab lwm yam boards feem ntau tsis tshaj 1.5%;qhov tso cai warpage (ob npaug-sided / multi-layer) ntawm cov khoom siv hluav taws xob sib dhos feem ntau yog 0.70 --- 0.75%, (1.6mm thickness) Qhov tseeb, ntau lub rooj tsavxwm xws li SMB thiab BGA boards xav tau warpage tsawg dua 0.5%;qee qhov chaw ua haujlwm txawm tias tsawg dua 0.3%;PC-TM-650 2.4.22B

Warpage xam txoj kev = warpage qhov siab / nkhaus ntug ntev
Lub Hoobkas roj teeb Circuit Court qhia koj yuav ua li cas tiv thaiv Circuit Court board warpage:

1. Engineering tsim: kev npaj ntawm interlayer prepreg yuav tsum sib haum;cov txheej txheem ntau txheej txheej thiab cov prepreg yuav tsum siv tib tus neeg muag khoom cov khoom;sab nrauv C/S saum npoo ntawm daim duab yuav tsum nyob ze li qhov ua tau, thiab cov phiaj xwm ywj pheej tuaj yeem siv tau;

2. Ci board ua ntej txiav
Feem ntau 150 degrees rau 6-10 teev, tshem tawm cov dej noo nyob rau hauv lub rooj tsavxwm, ntxiv cov resin kho kom zoo, thiab tshem tawm cov kev ntxhov siab nyob rau hauv lub rooj tsavxwm;ci lub rooj tsavxwm ua ntej txiav, seb lub puab txheej los yog ob sab yuav tsum tau!

3. Ua tib zoo saib rau qhov warp thiab weft kev taw qhia ntawm daim ntawv kho ua ntej stacking lub rooj tsavxwm multilayer:
Lub warp thiab weft shrinkage ratio yog txawv.Ua tib zoo saib rau qhov warp thiab weft kev taw qhia ua ntej txiav cov ntawv prepreg;them sai sai rau lub warp thiab weft kev taw qhia thaum txiav lub core board;Feem ntau qhov curing sheet yob kev taw qhia yog warp kev taw qhia;qhov ntev ntawm cov tooj liab clad laminate yog warp kev taw qhia;10 txheej 4OZ Hwj chim tuab tooj liab phaj

4. Laminating tuab kom tshem tawm kev ntxhov siab, txias nias tom qab nias lub rooj tsavxwm, txiav cov burrs;

5. Baking board ua ntej drilling: 150 degrees rau 4 teev;

6. Nws yog qhov zoo tshaj plaws kom tsis txhob txhuam cov phaj nyias, thiab kev siv tshuaj ntxuav yog pom zoo;tshwj xeeb fixtures yog siv thaum lub sij hawm electroplating los tiv thaiv lub phaj ntawm dabtsi yog khoov thiab folding

7. Tom qab txau cov tin, txias ib txwm nyob rau hauv chav tsev kub ntawm lub tiaj tus marble lossis steel phaj los yog huv si tom qab txias rau ntawm lub txaj-floating;