Lead-tin boards xav tau nyob rau hauv ntau yam khoom, tshwj xeeb tshaj yog PCB multilayer board nrog ntau ntau yam thiab me me. Yog tias siv cov txheej txheem cua kub kub, cov nqi tsim khoom yuav nce ntxiv, lub voj voog ua haujlwm yuav ntev, thiab kev tsim kho yuav teeb meem heev. Vim li no, cov hlau lead-tin feem ntau yog siv hauv kev tsim khoom, tab sis muaj teeb meem zoo dua thaum ua. Qhov teeb meem loj tshaj plaws yog PCB delamination thiab blistering. Yog vim li cas? Ua rau:

Ua rau muaj teeb meem PCB zoo

1. Kev txwv tsis raug ua rau huab cua, noo noo thiab cov pa phem nkag mus;

2. Thaum lub sij hawm nias, vim tsis txaus cua sov, lub voj voog luv luv, tsis zoo ntawm prepreg, thiab tsis raug ntawm cov xovxwm, uas ua rau muaj teeb meem nrog cov degree ntawm curing;

3. Kev kho blackening tsis zoo ntawm cov kab sab hauv lossis qhov chaw muaj kuab paug thaum blackening;

4. Lub puab ply los yog prepreg muaj paug;

5. Cov kua nplaum tsis txaus;

6. Cov kua nplaum ntau dhau-yuav luag tag nrho cov kua nplaum uas muaj nyob rau hauv prepreg yog extruded tawm ntawm lub rooj tsavxwm;

7. Nyob rau hauv cov ntaub ntawv uas tsis yog-functional yuav tsum, lub puab txheej pawg thawj coj saib yuav tsum txo qhov zoo ntawm cov loj tooj liab nto (vim hais tias lub bonding quab yuam ntawm cov resin rau tooj liab nto yog tsawg tshaj li qhov sib txuas quab yuam ntawm cov resin thiab cov resin);

8. Thaum lub tshuab nqus tsev nias yog siv, lub siab tsis txaus, uas yuav ua rau cov kua nplaum ntws thiab adhesion (qhov seem ntawm qhov kev ntxhov siab ntawm lub rooj tsavxwm multilayer pressed los ntawm lub siab kuj tsawg).

Rau cov yeeb yaj kiab thinner, vim tias tag nrho cov kua nplaum me me, qhov teeb meem ntawm cov khoom siv hauv cheeb tsam tsis txaus yuav tshwm sim, yog li kev siv cov yeeb yaj kiab nyias yuav tsum tau ua tib zoo saib xyuas. Tam sim no, qhov kev faib ua feem ntawm daim hlau nyias tau nce siab thiab siab dua. Txhawm rau kom muaj kev ruaj ntseg ntawm cov tuab, cov qauv ntawm cov khoom siv hauv paus cov chaw tsim khoom raug hloov kho rau cov kev taw qhia ntawm qhov qis qis. Txhawm rau txhim kho lub cev lub cev ntawm cov ntaub ntawv, cov khoom sib txawv tau muab ntxiv rau hauv cov txheej txheem resin. Thaum lub sij hawm ua hauj lwm ntawm lub substrate, zam lub colloid ntog thaum lub sij hawm ua hauj lwm, uas tej zaum yuav ua rau cov teeb meem ntawm huab cua npuas nyob rau hauv qab phaj tshwm sim los ntawm nyias resin los yog cream txheej.